taxonID	type	description	language	source
795287BFE4535510D0F175077701FC66.taxon	type_taxon	Type species and locality. Chiton textilis Gray, 1828 accepted as Ischnochiton textilis (Gray, 1828) (type by subsequent designation) textilis Gray, 1828: 1 – 5. Cape of Good Hope, South Africa.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4535510D0F1725F7081F820.taxon	description	(Figures 2 A, 4 A – I)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4535510D0F1725F7081F820.taxon	materials_examined	Type material. Lectotype ZMB Moll. 102027 (Kilias 1995). Type locality. Champerico, Guatemala or Acajutla, El Salvador (Kaas & Van Belle 1990). Material examined. Two specimens, BL 6.8 – 8.1 mm. Habitat. Under big, semi – humid rocks. The specimens were found on rocks buried in sand with brown and red crusty algae patches.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4535510D0F1725F7081F820.taxon	discussion	Remarks. The examination of Ischnochiton guatemalensis revealed microgranular sculpture (Figs. 4 A – C) of valves, lateral areas somewhat raised (Fig. 4 B). Each microgranule with 16 – 19 microaesthetes (Figs. 4 D – E). Girdle dorsal scales, somewhat bent with 7 – 10 longitudinal ribs which converge distally (Figs. 4 F – G). Radula with bicuspid major lateral and narrow central tooth (Figs. 4 H – I). According to Kaas & Van Belle (1990), I. guatemalensis shows a continuous distribution in the intertidal, from the Gulf of California to Guatemala. Nevertheless, it has not been registered since Kaas & Van Belle (1990) reported it in their monograph of worldwide living chitons, nor in recent studies such as the ones performed about the fauna from Mazatlán, Sinaloa (Ortiz – Arellano & Flores – Campaña 2008), the Mexican Tropical Pacific (MTP) (Jalisco, Guerrero and Oaxaca) (Reyes – Gómez et al. 2010; Flores-Garza et al. 2012; Galeana – Rebolledo et al. 2014; ReyesGómez et al. 2022) and the coast of El Salvador (García-Ríos et al. 2007). In the present study, we only obtained two individuals from both sites (Bahía la Choya, Puerto Peñasco), indicating that it may be a rare species (with respect to its abundance and occurrence) in the Northern Gulf of California. The absence of reports of I. guatemalensis in some regions of the Gulf and the MTP is also reflected in the lack of representative material of this species in the malacological collections. The report of this species from the northern Gulf of California represents the rediscovery of I. guatemalensis in this region after Kaas & Van Belle's report (1990).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4515512D0F176D27703FCF7.taxon	description	(Figure 2 B)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4515512D0F176D27703FCF7.taxon	materials_examined	Type material. Lectotype, designated by Kaas & Van Belle (1990), ANSP 66324. Type locality. La Paz, Baja California Sur, México (Kaas & Van Belle 1990). Material examined. Seventy – six specimens, BL 7.3 – 20.2 mm. Habitat. In the superficial intertidal on medium – sized and small rocks buried in sand. Specimens were collected from numerous loose rocks with dense patches of globular thalli (maximal diameter of 20 cm) of the alga Dictyosphaeria Decaisne, 1842.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4515512D0F176D27703FCF7.taxon	discussion	Remarks. Ischnochiton tridentatus has a sculpture of concentric zigzag lines and variable tegmentum color of light olive, dark green and gray (Fig. 2 B). Kaas & Van Belle (1990) reported the distribution of this species throughout the Gulf of California, including Mazatlán. However, recent studies have shown that I. tridentatus is absent in Mazatlán, while it is abundant at La Paz, Baja California Sur (García-Ríos & Álvarez-Ruiz 2007). In the present study, it was only registered at Bahía San Carlos, Sonora. The maximal size measured is 26.1 mm, coinciding with previous reports by Kaas & Van Belle (1990). Ischnochiton tridentatus is endemic to the Gulf of California. In our surveys, it was common to find small (maybe juveniles) and adult specimens cohabiting at beaches with low wave energy.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4515512D0F175EC729EFBFB.taxon	type_taxon	Type species and locality. Chiton limaciformis G. B. Sowerby I, 1832 accepted as Stenoplax limaciformis (G. B. Sowerby I, 1832) (type species by original designation), Stenoplax limaciformis Sowerby, 1832. México to Inner Lobos Id, Peru, Guacomayo.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4515513D0F172E07790F8EB.taxon	description	(Figures 2 C, 4 J – N) Chiton limaciformis Sowerby in Broderip & Sowerby, 1832: 25 – 33. Chresonymy and synonymy in Bullock (1985).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4515513D0F172E07790F8EB.taxon	materials_examined	Type material. Syntype BMNH 1980007 / 1. Type locality. According to Kaas & Van Belle (1987) at Inner Lobos, Perú; Central America, Guacomayo (the exact location is unknown; it is even unclear from which country in Central America). Material examined. Ninety – five specimens, BL 11.2 – 28.9 mm. Habitat. In the intertidal, on medium – sized and small rocks with patches of crusty algae and abundant globular tally of the algae Dictyosphaeria Decaisne, 1842. The algae patches had a maximum diameter of 20 cm.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4515513D0F172E07790F8EB.taxon	discussion	Remarks. Stenoplax limaciformis has a sculpture of somewhat elevated ribs, the ribs are usually broken at the periphery of the valves and become less broken and can show a zigzag arrangement towards the apex (Figs. 4 J, L). Lateral areas of valves raised and central areas with narrow longitudinal ribs (Fig. 4 K). Girdle with small, bent dorsal scales showing eroded surface with 5 – 9 longitudinal, broken striae (Fig. 4 M). Radula with tricuspid major lateral and short thin central tooth (Fig. 4 N). Stenoplax limaciformis differs from the other species of Stenoplax in body shape and tegmentum sculpture. The morphological characters of S. limaciformis are: 1) high variation in the color pattern of the tegmentum, 2) maximal known body size 35 mm, 3) moderately elevated tegmentum sculpture of irregular and / or inter – cut slats forming nodules, and 4) elongated girdle scales, curved and with longitudinal fine grooves. However, S. sonorana exhibits a gray or olive – green tegmentum color; its maximum size is up to 65 mm; with coarse, elevated tegmentum and long bent spicules. Stenoplax limaciformis is more similar to the species of the Caribbean (Stenoplax purpurascens C. B. Adams, 1845, S. floridana Pilsbry, 1892, and S. bahamensis Kaas & Van Belle, 1987). These morphological similarities were also noted by Ferreira (1978) and Bullock (1985) and were confirmed in a molecular clock (cox 1) study by García-Ríos et al. (2014). Bullock (1985) concluded that S. limaciformis shows a greater affinity to S. purpurascens. He noted that S. floridana, S. purpurascens, and S. bahamensis are morphologically similar but can be differentiated by details in shape and arrangement of the tegmentum sculpture, also observed in the Stenoplax species from the Mexican Caribbean discussed by Reyes – Gómez et al. (2017). Bullock (1985) recognized the Caribbean Stenoplax species including S. limaciformis from the Pacific as a complex of “ sister species ". The phylogeny of this genus requires more in – depth studies that analyze morphological characteristics and DNA regions of more individuals of the species that constitute this genus. Due to the absence of S. limaciformis in the samples collected at higher latitudes, the present study considers Bahía San Carlos, Sonora as the northern limit of this species. Bullock (1985) reported that the northern limit of this species is located at Puertecitos and La Libertad, Baja California. However, Kaas & Van Belle (1987) mentioned that the distribution of S. limaciformis extends from the Gulf of California to Lobos Island, Perú.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F176D2776EFBFA.taxon	description	(Figures 2 D, 5 A – E)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F176D2776EFBFA.taxon	materials_examined	Type material. Syntype, USNM 58865. Type locality. Gulf of California (Kaas & Van Belle 1990). Material examined. 162 specimens, BL 5.2 – 14.3 mm. Habitat. In the intertidal during low tides, adhered to medium – sized and small rocks buried in sand. It was collected from loose rocks with crusty brown and red algae patches with numerous globular thalli of Dictyosphaeria Decaisne, 1842.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F176D2776EFBFA.taxon	discussion	Remarks. Stenoplax mariposa has a sculpture of irregular flat nodules (Figs 5 A – C); central areas with longitudinal fine grooves; lateral areas indicated by a change of the sculpture arrangement (Fig. 5 B). Dorsal scales of girdle subrectangular shaped, somewhat bent with 22 – 32 longitudinal grooves distally (Fig. 5 D). Radula with tricuspid major lateral and narrow, short central tooth (Fig. 5 E). Stenoplax mariposa, along with S. petaloides Gould, 1846 from the Hawaiian Islands, S. rugulata (G. B. Sowerby I, 1832) with a distribution range from Nicaragua to Ecuador (including the Galapagos Islands) all together form a species complex (Reyes-Gómez et al. 2023). This complex is characterized by their small size (BL 8 – 18 mm) and by having a tegmentum with a sculpture of longitudinal broken grooves in the central areas; lateral areas not raised, with irregular nodules or fine grooves; girdle scales twice or thrice as wide as long, with numerous longitudinal ribs; radula with narrow and elongated central tooth and the major lateral tooth with a tricuspid head or cusp. At a first glance, these species are very similar to each other, especially due to the pattern of the tegmentum color (purple, olive green, light green, brown, cream, and white) and characteristic turquoise dots located in the jugal area of the intermediate valves. Stenoplax mariposa differs from its congeners by displaying a sculpture of irregular, flat nodules on the lateral areas, the head, and on the anteromucronal area of the tail valves (Figs. 5 A – C). It displays longitudinal narrow, broken ribs that are somewhat elevated, covering the entire central area (Fig. 5 B).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F172E07635F85E.taxon	description	(Figures 2 E, 5 F – J)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F172E07635F85E.taxon	type_taxon	Type material. Holotype, SBMNH 34427, “ Berry collection 15131 ”.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F172E07635F85E.taxon	materials_examined	Type locality. Puerto Peñasco, Sonora, México (Kaas & Belle 1987). Material examined. 124 specimens, BL 7.1 – 14.3 mm.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F172E07635F85E.taxon	biology_ecology	Habitat. On large and medium – sized rocks semi – buried in sand.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F172E07635F85E.taxon	discussion	Remarks. This species has a body length ranging from 35 – 45 mm. The tegmentum has an olive green, dark green, and gray coloration with pink eroded areas. Tegmentum strongly sculptured with concentric corrugated ribs (Figs. 5 F – H); the lateral areas and the tail valve are elevated showing concentric ribs that break into irregular nodules (Figs 5 G – H); girdle with elongated spicules ornamented with longitudinal ribs (Fig. 5 I); central and minor lateral teeth of the radula are elongated short plates (Fig. 5 J).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F172E07635F85E.taxon	distribution	Kaas & Van Belle (1987) reported the distribution of this species from Guaymas to the north of the Gulf of California. In the present study, S. sonorana was found at four localities within the region (Bahía San Carlos, Bahía Kino, Puerto Peñasco and de Bahía de los Ángeles). Only one specimen was obtained from Bahía San Carlos; however, we found numerous specimens in Puerto Peñasco and Bahía de los Ángeles.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45E551DD0F172E07635F85E.taxon	discussion	Stenoplax sonorana along with S. circumsenta Berry, 1956, S. fallax Carpenter in Pilsbry, 1892, Stenoplax magdalenensis Hinds, 1845, Stenoplax conspicua Carpenter in Pilsbry, 1892, and S. heathiana Berry, 1946 are part of a group of large, thick chitons inhabiting the Gulf of California and the west coast of the BC peninsula up to California. This species differs from its congeners by displaying an irregular diamond – like shaped sculpture of the central areas (usually eroded in adult specimens) and by having elongated, curved dorsal girdle spicules.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45D551ED0F170F47772F897.taxon	type_taxon	Type species and locality. Chiton mertensii Middendorff, 1847 accepted as Lepidozona mertensii (Middendorff, 1847) (type by original designation), von Middendorff, 1847: 113 – 122. California.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45C551FD0F176D277D0FCF7.taxon	description	(Figures 2 F, 6 A – F)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45C551FD0F176D277D0FCF7.taxon	materials_examined	Type material. According to Ferreira (1974) he did not find the holotype, which was recorded to be held in BMNH. Type locality. According to Ferreira (1974) at San Felipe, Baja California (BC), México. Material examined. Four specimens, BL 18.1 – 19.2 mm. Habitat. On large rocks with brown and red crusty algae patches, in exposed areas that are semi – dry during low tide. The chitons were found in the lower part of loose rocks buried in sand in a moist environment.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45C551FD0F176D277D0FCF7.taxon	discussion	Remarks. Lepidozona clathrata has a sculpture of radial ribs with rounded knobs on head, tail valves and lateral areas of intermediate valves (Figs. 6 A – D); lateral areas with 3 – 4 ribs with aligned somewhat elevated knobs (Fig. 6 B). Central areas with sculpture of thick red, jugal area with 3 – 5 longitudinal elevated ribs (Figs. 6 B – D). Dorsal girdle scales with a horn – like projection located on its apical edge (Fig. 6 E). Major lateral radular tooth unicuspid, minor lateral shorter than the central tooth (Fig. 6 F). Lepidozona clathrata is a relatively large species compared to other species of the genus Lepidozona from the Gulf of California (Kaas & Van Belle 1987), with a maximum length of 38 mm. This species is characterized by having a coarse tegmentum, girdle dorsally covered with large sub – rectangular scales (240 μm) with rounded edges and a small, short protrusion in the shape of a horn at the apical edge of the scale (Fig. 6 E).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45C551FD0F175EC7729F824.taxon	description	(Figures 2 G, 6 G – L)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45C551FD0F175EC7729F824.taxon	materials_examined	Type material. The holotype (USNM 16204) is lost according to Kaas & Van Belle (1987). Paratype, PRM 98. Type locality. Cabo San Lucas, Baja California Sur, México. Material examined. Three specimens, BL 7.9 – 8.7 mm. Habitat. In the intertidal on medium – sized rocks buried in sand, with brown and red crusty algae patches.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45C551FD0F175EC7729F824.taxon	discussion	Remarks. The tegmentum of Lepidozona serrata is usually eroded; it exhibits a fine sculpture of radial low ribs (Figs. 6 G – I). The posterior margin of the head and intermediates valves displays 8 – 9 longitudinally arranged denticles (Figs. 6 G – H); central areas with net – like sculpture and smooth jugal area (Figs. 6 H – I); lateral areas somewhat raised with 3 radial fine grooves (Fig. 6 H). Girdle with small, bent dorsal scales with small, rounded spheres aligned longitudinally towards its distal edge (Fig. 6 K). Radula with unicuspid major lateral teeth; the central tooth is larger than the minor lateral tooth, which is distally bilobulated (Fig. 6 L). Ferreira (1974) reported the distribution of this species from San Diego, California, to Magdalena Bay on the west coast of Baja California (BC), from the interior of the Gulf of California, from San Luis Gonzaga to Cabo San Lucas, including Punta Chivato of Bahía Concepcion, Bahía Kino, Guaymas, Mazatlán and the islands of Espíritu Santo, San Francisco, Carmen, Coronados, Tiburón and Tres Marías. Kaas & Van Belle (1987) considered the same distribution and added that it is " continuously " distributed throughout the Gulf of California. In the present study, only three L. serrata individuals were registered from two sites: Playa las Palmas and Bahía Kino, both in Sonora. Pilsbry (1892) considered L. serrata as a member of the genus Ischnochiton, because according to him, the species is smaller than other species of Lepidozona. Ferreira (1974) and Pilsbry (1892) identified significant morphological differences between L. serrata and the diagnostic characteristics of the genus Lepidozona. Both authors considered that the few similarities that L. serrata shares with the other members of the genus Lepidozona might be the result of convergences and a possible polyphyletic origin of the genus. Moreover, other Lepidozona species have a reduced number of ribs on the lateral areas (2 – 4) and the postmucronal area of the tail valve (8 – 6 ribs). In addition, the girdle scales are much smaller (200 μm) than those observed in the other species of the genus.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45B5519D0F1714772BFFCF2.taxon	description	(Figures 2 H, 7 A – F)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45B5519D0F1714772BFFCF2.taxon	materials_examined	Type material. Holotype, SBMNH 34432 ex. “ Berry collection 15132 ”. Type locality. Puerto Peñasco, Sonora, México (Kaas & Van Belle 1987). Material examined. 284 specimens, BL 6.1 – 19.7 mm.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45B5519D0F1714772BFFCF2.taxon	biology_ecology	Habitat. On semi – humid large and medium – sized rocks buried in sand with brown and red crusty algae patches exposed during low tide. At Playa Cementerio and Playa Gringa in the Bahía de los Ángeles, Baja California (BC) it was found on a substrate with abundant anemones and ascidians, asteroids, ophiuroids, and holothuroids.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45B5519D0F1714772BFFCF2.taxon	discussion	Remarks. This species has a nodular radial sculpture (Figs. 7 A – C) and lateral areas with 4 – 6 fine grooves (Fig. 7 B). Aesthetes with 6 – 9 microaesthetes (Fig. 7 D). Radula with bicuspid major lateral and bilobate minor lateral tooth (Figs. 7 E – F). Ferreira (1974) proposed that L. subtilis is distributed from 26 ° N in the Gulf of California up to Puerto Peñasco including Puerto Lobos, Bahía San Pedro, Guaymas, San Felipe, Puertecitos, Bahía San Luis Gonzaga, Bahía de los Ángeles, and Bahía San Francisquito. Most of this distribution accounts were based on field observations, specimens from the collection of the California Academy of Sciences, and private collections (Allyn G. Smith and George Hanselman). We recorded this species from Bahía Kino to Bahía de los Ángeles, BC which coincides with the distribution reported by Ferreira (1974). This species was the most numerous in our samples, representing 40 % of the total number of specimens, and was present at almost all sampling sites, except Bahía San Carlos, Sonora. The studied specimens have varied coloration patterns of red, orange, yellow, olive green, dark green, and beige with combinations of these colors in spots or lines as was also reported by Ferreira (1974). We also observed a variable number of ribs in the adult individuals and no apparent relationship between rib number and body length. These variations were also pointed out by Ferreira (1974), who found that L. subtilis differs from its congeners by the absence of a protuberance (horn) on the apical edge of the scales.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45A5519D0F175B37082FBD8.taxon	type_taxon	Type species and locality: Callistochiton palmulatus Carpenter [in Dall], 1879 (type by monotypy), Callistochiton palmulatus Carpenter MS, Dall, 1879: 281 – 344. Sta Barbara, California.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45A551AD0F172FB70FDF854.taxon	description	(Figures 2 I, 7 G – K) Chiton elenensis Sowerby in Broderip & Sowerby, 1832: 50 – 61. Chresonymy and synonymy in Kaas & Van Belle (1994).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45A551AD0F172FB70FDF854.taxon	materials_examined	Type material. Lectotype, designated by Kaas & Van Belle (1994), NHM 20150526.1 (the left specimen on the tablet) from the H. Cuming collection. Acc. no: 1829 / 1. Type locality. Santa Elena, Panamá. Material examined. Eleven specimens, BL 5.7 – 14.5 mm. Habitat. In the intertidal on medium – sized and small semi – humid rocks. At Las Palmas and Playa Pintas, the rocks were densely covered with the algae Dictyosphaeria decaisne.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE45A551AD0F172FB70FDF854.taxon	discussion	Remarks. Callistochiton elenensis has a sculpture of wide, thick, elevated ribs with rounded knobs (Figs. 7 G – I). Dorsal girdle scales 3 times wider than long with 10 – 12 wide, longitudinal ribs (Fig. 7 J). Major lateral radular tooth tricuspid, minor lateral tooth smaller and shorter than the central tooth, which appears as an elongated plate (Fig. 7 K). According to Ferreira (1979), Kaas & Van Belle (1994) and García-Ríos & Álvarez-Ruiz (2007), Callistochiton elenensis shows a distribution range from Pichilingue, Balandra and Tecolote, La Paz, Baja California Sur (BCS) to Punta Ancón, Santa Elena peninsula, Ecuador. In the Mexican Tropical Pacific (MTP), the species has been recorded in Mazatlán, Sinaloa and Sayulita, Nayarit, as a common member of the rocky intertidal (Flores-Garza et al. 2012; Galeana – Rebolledo et al. 2014; Reyes – Gómez et al. 2010; Reyes – Gómez et al. 2022). Ríos – Jara et al. (2020) also recorded this species from Bahía de Chamela, Jalisco. This is a medium – sized species (up to 21 mm); it is characterized by radial ribs on the lateral areas of the head and tail valves. The ribs are formed by pustules or slightly elevated rounded nodules and a net – like sculpture on the central areas. The detailed study of specimens from La Paz (BCS), Sayulita (Nayarit) and Acapulco (Guerrero) performed by Reyes – Gómez et al. (2022) revealed that the specimens from the southern coasts of México are smaller (up to 14 mm) and have fewer radial ribs on the head and tail valve (8) than the specimens from La Paz. The specimens examined by us have a head valve with nine thick radial ribs, eight ribs on the tail valve and a maximal size of 14.5 mm. The specimens obtained from Bahía San Carlos, Puerto Peñasco, Sonora and from Bahía de los Ángeles have a similar size as those from the MTP. They also display nine ribs on the head valve and eight on the tail valve. Their tegmentum sculpture is less elevated and not as coarse.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE458551BD0F1769C7635FEF5.taxon	type_taxon	Type species and locality. Dendrochiton thamnoporus (Berry, 1911): 487 – 492. (type by original designation) Dendrochiton thamnoporus Berry, 1911, as Mopalia (Dendrochiton) in Berry, 1911. Monterey Bay, California.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE458551BD0F177E470C7FBCC.taxon	description	(Figures 3 A, 8 A – H)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE458551BD0F177E470C7FBCC.taxon	materials_examined	Type material. Holotype, SBMNH 34440 from the “ Berry collection 29879 ”. Type locality. North shore of Bahía San Felipe, Baja California. Material examined. Three specimens, BL 8.5 – 17.1 mm. Habitat. On large rocks with brown and red crusty algae. The rocks were found in an exposed area, dry during the low tide. The chitons were collected on rocks, buried in sand, in a moist environment.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE458551BD0F177E470C7FBCC.taxon	discussion	Remarks. The sculpture of Dendrochiton lirulatus has irregular pits arranged in quincunx (Figs. 8 A, C); lateral areas with eroded sculpture and remains of smaller pits near the apex area (Fig. 8 B); intermediate areas with 12 – 15 longitudinal coarse ribs (Figs. 8 B, C). Tiny elongated dorsal girdle spicules with an apical nipple – like top (Fig. 8 G); long, branched bristles (Figs. 8 E – F). Major lateral radular tooth tricuspid, minor lateral tooth smaller and shorter than the central tooth, which appears as a sub – rectangular plate (Fig. 8 H). Dendrochiton lirulatus is the only species of this genus in the Gulf of California. It is characterized by longitudinal ribs on the central areas of the intermediate valves, a girdle with tiny spicules, and tufts of ramified corneous hairs. According to Kaas & Van Belle (1985), the distribution of this species is confined to the north of the Gulf of California, from Bahía San Felipe, BC and Bahía la Choya, Puerto Peñasco down to Guaymas, Sonora. The specimens studied herein come from the known distribution range.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE458551BD0F172F6725CFA41.taxon	materials_examined	Type material and locality. Chiton marginatus Pennant, 1777 = Chiton cinereus Linnaeus, 1767: 1 – 532, accepted as Lepidochitona cinerea (Linnaeus, 1767). Norwegian sea. Based on molecular studies, Eernisse (2007) reestablished the genus Cyanoplax and assigned the Lepidochitona species of the West Coast of the United States to a lineage independent from the Atlantic and Mediterranean species. Accordingly, Lepidochitona beanii (from the Gulf of California) and the Caribbean Lepidochitona species are retained as members of the genus Lepidochitona, and the genus Nutallina has been identified as the sister group to Cyanoplax.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4585505D0F1707A71A0FD62.taxon	description	(Figures 3 B, 8 I – O)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4585505D0F1707A71A0FD62.taxon	materials_examined	Type material. Lectotype, designated by Keen (1968), Carpenter´s Mazatlán collection, LACM tablet 905. Type locality. Mazatlán, Sinaloa, México. Material examined. Ten specimens, BL 4.7 – 8.5 mm. Habitat. In the upper intertidal on medium – sized and small rocks, buried in sand.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4585505D0F1707A71A0FD62.taxon	discussion	Remarks. Lepidochitona beanii has a microgranular sculpture in all valves (Figs. 8 I – M), lateral areas delimited by a shallow depression (Fig. 8 L). Girdle densely covered by tiny spicules and tufts of hyaline curved spicules, bunched in groups of 3 – 5 located near the sutural areas of the valves (Figs. 8 I – J). Radula with tricuspid major lateral tooth, minor lateral tooth long and narrow, shorter than the central tooth, which is a sub – rectangular, long plate (Figs. 8 N – O). Ferreira (1982) recorded specimens from Baja California (he did not specify the exact locality) with a maximum size of 11.7 mm, and with varied tegmentum colors (pink, cream, and light " salmon " color). Ferreira (1982) reported that hyaline girdle spicules are lacking in small individuals (BL 4.5 mm) and concluded that these structures develop in the last phase of the juvenile stage (this cannot be confirmed herein, see below). Kaas & Van Belle (1985 a) reported that L. beanii has been collected from the intertidal to up to 230 m depth, showing a continuous distribution from southern California to Perú, including the Gulf of California. García-Ríos & Álvarez-Ruiz (2007) reported L. beanii from La Paz, Baja California Sur (BCS). There are no recent reports from the type locality, Mazatlán, Sinaloa. We found that hyaline spicules are present even in small specimens collected at Bahía Kino (BL 3.6 mm, see Fig. 8 I) and La Paz (BL 3.1 mm, see Fig. 8 J). Smaller specimens also showed hyaline spicules, while larger ones showed evidence of many broken spicules. Therefore, Ferreira's (1982) hypothesis regarding the late ontogenetic development of the spicules could not be confirmed.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4465505D0F1759E70D3F856.taxon	description	(Figures 3 C, 9 A – I)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4465505D0F1759E70D3F856.taxon	materials_examined	Type material. Holotype, SBMNH 34423 from the “ Berry collection 15133 ”. Type locality. Puerto Peñasco, Sonora, México. Material examined. Forty-one specimens, BL 8.5 – 7.1 mm. Habitat. In the upper intertidal on medium – sized and small rocks, on exposed rocky massifs, among brown algae that were also under large rocks buried in sand.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4465505D0F1759E70D3F856.taxon	discussion	Remarks. Nuttallina crossota exhibits irregular granulose sculpture arranged in quincunx (Figs. 9 A – D); the lateral areas are reduced with 2 elevated thick radial ribs (Figs. 9 B, C); jugal area with the sculpture, however, usually very much eroded in adult specimens (Figs. 9 B, C). Girdle densely covered with small elongated, striated spicules and interspersed, thick hyaline spicules (Figs. 9 E – F). Major lateral radular tooth tricuspid, minor lateral reduced, smaller and shorter than central tooth; central tooth appears as a sub – rectangular plate with its apical edge slightly bent outwards (Figs. 9 H – I). The genus Nuttallina was considered a member of the family Callistoplacidae (Pilsbry 1893; Smith 1960) due to the similarity of the insertion slits of the articulamentum and the ribs of the valve tegmentum. Later, this genus was included in the family Lepidochitonidae (see Thiele 1929; Thorpe 1971; Van Belle 1977) based on four characteristics: 1) the tegmentum has granules, 2) the tail valve is smaller than the head valve, 3) the major lateral tooth is tricuspidate, and 4) the girdle scales are small. Nuttallina crossota is endemic and the only species of this genus in the Gulf of California. At Puerto Peñasco (the type locality), the species was not found, while at Playa Cementerio, the number of the collected individuals was three and at Las Palmas, Bahía Kino two specimens were found. However, at Pie de Faro, Bahía San Felipe, the number of individuals collected was high (36 individuals). Most of the individuals showed an eroded tegmentum on the jugal area of the intermediate valves; some were eroded in the lateral areas as well. At Pie de Faro, Bahía San Felipe, the specimens were found sheltered among brown algae densely covering a large volcanic rock massif with a rough surface, 1.60 m high and 12 m long. During low tide, the rock massif was totally exposed and dry with Nuttallina crossota covered by the algae. In the lower part of the beach, they were observed on (large) submerged rocks semi – buried in sand and buried on the base of the rock massif.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4465505D0F175567100FC3A.taxon	type_taxon	Type species and locality. Chiton scaber Reeve, 1847: 93 – 159, accepted as Nuttallina californica (Reeve, 1847) (type by monotypy). Central America.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4455506D0F173EB7199F99A.taxon	materials_examined	Type material and locality. Chiton tuberculatus Linnaeus, 1758 (type by subsequent designation), Chiton tuberculatus Linnaeus, 1758: 667. Central America.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4455507D0F170397167FE7F.taxon	description	(Figures 3 D, 7 L)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4455507D0F170397167FE7F.taxon	materials_examined	Type material. According to Bullock (1988), the holotype is held in BMNH but Bullock mentioned that it was not found. Type locality. According to Bullock (1988) at Bahía Kino, Sonora, México. Material examined. Sixty – two specimens, BL 3.9 – 47.8 mm. Habitat. In the intertidal, on large rocks with brown and red crusty algae patches. The rocks were found in shallow waters in an exposed, semi – dry rocky area; the chitons were collected on the rocks buried in the wet sand.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4455507D0F170397167FE7F.taxon	discussion	Remarks. Chiton virgulatus has radial, bifurcated, narrow ribs (Fig. 3 D) on the head and tail valves and the lateral areas of the intermediate valves. Radula with unicuspid major lateral teeth, minor lateral tooth of about the same length as the central tooth (Fig. 7 L). Thorpe (1971) and Abbott (1974) agreed that Chiton stokesii and C. virgulatus are sympatric in the southern Mexican Tropical Pacific (MTP). Bullock (1985) and Reyes – Gómez (2016) rectified this assumption based on their expeditions in this region and the study of additional material. They found that C. virgulatus is restricted to the Gulf of California and C. stokesii to Central America. Chiton virgulatus is endemic to the Gulf of California and, contrary to other species of the genus Chiton present in the Mexican Pacific, it is characterized by a longitudinal and bifurcated tegmental sculpture.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4445507D0F175797262F898.taxon	description	(Figures 3 E, 10 A – F)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4445507D0F175797262F898.taxon	materials_examined	Type material. Lectotype by designation of Watters (1981), ANSP 349330. Type Locality. Catalina Island, California, USA. Material examined. One specimen, BL 9.6 mm. Habitat. In the intertidal zone, in an exposed area with semi – wet rock mounds during low tide. The chiton was collected from the lower part of a rock semi – buried in sand with brown and red crusty algae patches.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4445507D0F175797262F898.taxon	discussion	Remarks. Acanthochitona avicula exhibits pustules with numerous (10 – 16) micraesthetes (Fig. 10 D). The jugum exhibits a smooth surface with the micraesthetes openings visible (Figs. 10 B, C). Girdle densely covered by curved, striated hyaline spicules (Fig. 10 E). Radula with tricuspid major lateral teeth, the middle cusp is longer than the other two; minor lateral tooth very reduced; the central tooth is an elongated, apically hook – like plate (Fig. 10 F). Acanthochitona avicula was considered a synonym of A. angelica Dall, 1919 by several authors (Thorpe 1971; Abbott 1974; Kaas & Van Belle 1990). However, Smith (1977) indicated that the tegmentum color pattern of A. angelica does not correspond to the variations in color observed in A. avicula. Watters (1990) recognized both species as independent, considering the distribution of A. angelica in the Gulf of California, without specifying the sampling sites, which were somewhere in the Bahía de los Ángeles, Baja California (BC), and Islas Tres Marías, Nayarit. Moreover, he indicated that A. avicula has a wider distribution, from the Bahía la Choya to Puerto Peñasco, Sonora. He reported it as a common species in the intertidal and up to 20 m depth. Watters (1990) provided a detailed morphological description of the Acanthochitona species from the eastern Pacific and provided for all of them SEM images of the valve pustules. This author showed that the jugum of A. avicula has 8 to 12 deep longitudinal grooves and that the pustules of the tegmentum are drop – shaped, densely covering the lateropleural areas. Conversely, A. angelica has a jugum with 7 to 10 more superficial grooves, the pustules are smaller and slightly rounded. The A. avicula specimen obtained in the present study showed that the pustules adjacent to the jugum are elongated, the peripheral pustules are less elongated, and the jugum is smooth on its center.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4445507D0F1742F702BFD5F.taxon	type_taxon	Type species and locality. Chiton fascicularis Linnaeus, 1767 accepted as Acanthochitona fascicularis (Linnaeus, 1767) (type by monotypy), Gray, J. E. (1821): 229, 239. England.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4435502D0F170BB721CFE02.taxon	description	(Figures 3 F, 10 G – L)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4435502D0F170BB721CFE02.taxon	materials_examined	Type material. Lectotype, designated by Watters (1990), ANSP 349332. Type locality. Bahía Las Ánimas, Baja California (BC), México. Material examined. Twenty – six specimens, BL 8.3 – 20.9 mm. Habitat. On large to medium – sized semi – submerged rocks, mainly on rough surfaces with coralline algae, either filamentous, crusty, green, brown or red.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4435502D0F170BB721CFE02.taxon	discussion	Remarks. Acanthochitona exquisita has a sculpture of pustules with one aesthete on the center of its base (Figs 10 J, K). Intermediate valves with sub – triangular tegmentum and jugal area smooth (Fig. 10 H). Major lateral radular tooth tricuspid, minor lateral teeth small and short, very reduced; the central tooth appears as a rectangular long plate (Fig. 10 L). This species can reach body lengths between 25 and 34 mm and is considered a large species within the genus.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4405503D0F17130703BF854.taxon	materials_examined	Type material. Holotype, USNM 110346. Type locality. Bahía de los Ángeles, Baja California, México.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE4405503D0F1730772BAF9BE.taxon	materials_examined	Type material. Holotype (in balsam), SBMNH 34396 from the “ Berry collection 4102 ”. Type locality. Monterey Bay, California off Point Pinos; probably from the intertidal and also found at a depth of 61 m (Sirenko & Clark 2008); it was recorded from Canal Salsipuedes, Gulf of California (28 ᵒ 35 ’ N, 112 ᵒ 35 ’ W) (Stebbins & Eernisse 2009).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44F550CD0F176D271DFFEEE.taxon	materials_examined	Type material. Lectotype, by designation of Keen (1968), BMNH 1857. 6. 4. 907. Partially disarticulated specimen. Type locality. Mazatlán, Sinaloa, México	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44F550CD0F177D67764FDB6.taxon	materials_examined	Type material. Holotype, LACM 2880. Type locality. Canal de San Lorenzo, Baja California, México (Clark 2000).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44F550CD0F1742E7755FCBA.taxon	materials_examined	Type material. Syntypes, BMNH 1984050. Type locality. Restricted to Chatham Islands, Islas Galápagos, Ecuador according to Smith & Ferreira (1977). According to Watters (1990), it is distributed throughout the Gulf of California.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44F550CD0F1727A77E4FB6A.taxon	materials_examined	Type material. Lectotype, USNM 110345. Type locality. Bahía de los Ángeles, Baja California, México (Kaas & Van Belle 1987).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44F550CD0F1705673A4F912.taxon	materials_examined	Type material. Holotype, CASI 028810. Type locality. Isla Pata, Bahía de los Ángeles, Baja California, México (Ferreira 1983 a; Kaas & Van Belle 1987).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44F550CD0F172B672B8FA6E.taxon	materials_examined	Type material. Holotype, IRSN IG – 11365. Type locality. Machalilla, Ecuador (Ferreira 1983 a). Within the Gulf of California in Bahía San Felipe, Baja California; Guaymas, Sonora and Mazatlán, Sinaloa (Ferreira 1983 a; Kaas & Van Belle 1987)	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44F550DD0F171DA7746FF7A.taxon	materials_examined	Type material. Holotype, IRSN IG – 27.436. Type col. 442. Type locality. Puerto Peñasco, Sonora, México (Kaas & Van Belle 1990).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44E550DD0F1776377CCFE02.taxon	materials_examined	Type material. Holotype, CASI 098786. Type locality. Isla el Requesón, Bahía Concepción, Baja California Sur (Clark 2000).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44E550DD0F177BB7769FD2A.taxon	materials_examined	Type material. Holotype, LACM 2877. Type locality. Punta Bajo (about 10 km north of Loreto), Baja California Sur.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44E550DD0F1755B7779FC0A.taxon	materials_examined	Type material. Holotype, CASG 55073. Type locality. Isla San Francisco, Baja California Sur, México (Ferreira 1974).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44E550DD0F1728B77EAFAFA.taxon	materials_examined	Type material. Holotype, IRSN IG – 23.377, type coll. 437 / 2. Type locality. Puerto Peñasco, Sonora (not Punta Peñasco as in Kaas & Van Belle 1990).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44E550DD0F175B377F4FBD2.taxon	materials_examined	Type material. Holotype, CASI 050246. Type locality. Isla Smith, Bahía de los Ángeles, Baja California, México (Ferreira 1985).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44E550DD0F173E377EAF982.taxon	materials_examined	Type material. Holotype, IRSN IG – 23.377, type collection 438 / 2. Type locality. Puerto Peñasco, Sonora (not Punta Peñasco as in Kaas & Van Belle 1990).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44E550DD0F1708370C7F8E2.taxon	materials_examined	Type material. Lectotype, BMNH 1842.2. 21.38, by designation of Kaas & Van Belle (1987). Type locality. Bahía Magdalena, Baja California Sur, México.	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44D550ED0F1769A7709FECA.taxon	materials_examined	Type material. Holotype, LACM 2878. Type locality. Canal de San Lorenzo, Baja California Sur, México (Clark 2000).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
795287BFE44D550ED0F174027751FD62.taxon	materials_examined	Type material. Holotype, LACM 2707. Type locality. Bahía de los Ángeles, Baja California, México (Clark 1994).	en	Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen, Ríos-Jara, Eduardo (2023): Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key. Zootaxa 5296 (2): 147-178, DOI: 10.11646/zootaxa.5296.2.2, URL: http://dx.doi.org/10.11646/zootaxa.5296.2.2
