taxonID	type	description	language	source
03BBB75EFFACFFD956E5FF5BE5850F15.taxon	description	(Figs. 2 – 4)	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFACFFD956E5FF5BE5850F15.taxon	vernacular_names	[New English name: Matsu earthworm goby] [Chinese name: DZ Ḃṃḛ]	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFACFFD956E5FF5BE5850F15.taxon	materials_examined	Materials examined Holotype. NTOUP- 2023 - 05 - 306, 37.7 mm SL, Zhuluo, Nangan Island, Matsu Islands, Lianjiang County; coll. C. L. Lee, 2 March, 2023. Paratypes. — NTOUP- 2023 - 05 - 307, 2 specimens, 28.1 – 39.0 mm SL, Zhuluo, Nangan Island, Matsu Islands, Lianjiang County; coll. C. L. Lee, 2 March, 2023.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFACFFD956E5FF5BE5850F15.taxon	diagnosis	Diagnosis Luciogobius matsuensis can be well distinguished from all other congeneric species by the following unique combination of features: (1) second dorsal fin rays: I / 12 and anal fin rays: I / 12; (2) pectoral fin rays modally 16 and with one upper, very short free soft ray; (3) vertebral count: 17 + 20 – 21 = 37 – 38; and (4) specific coloration: second dorsal fin translucent with tiny brown spots; caudal fin with many tiny brown spots; anal fin pale yellow and translucent, spotless, and darker in its rays; and pectoral fin creamy yellow with anterior 2 / 3 region with tiny brownish to black spots.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFACFFD956E5FF5BE5850F15.taxon	description	Description Body very slender, cylindrical anteriorly, and somewhat compressed posteriorly (all morphometric data is shown in Table 1). Head flat and depressed. Cheek slightly fleshy. Eye moderately small. A horizontal dermal fold on upper part of cheek and below orbit. Snout flat and short. Anterior nasal opening as a protruded, horizontal short tube and posterior nasal opening as a round hole. Interorbital region rather wide, about two times of eye diameter. Mouth oblique, maxillary extending to vertical of rear margin of orbit. Lower jaw more prominent compared to upper jaw. Teeth rather minute, with about 4 rows of tiny conical teeth, with outer rows larger in both jaws. Tongue somewhat pointed, but anterior tip bilobed. Gill-opening rather restricted, extending merely slightly below lower margin of pectoral base. Anus located in posterior half of body. Vertebral count 17 + 20 – 21 = 37 – 38. Fins. D 2 I / 12, A I / 12, P 16. D 1 absent. D 2 with middle one third portion of rays longest. A shape similar to D 2. Both first spines in D 2 and A relatively short. A origin in front of D 2 origin. D 2 origin inserted vertical between 2 nd and 3 rd branched rays of A. Both rear tips of D 2 and A far from procurrent rays of C when depressed. P rounded, and its length about equal to postorbital length. P with a short, free soft ray on upper margin near upper basal region. C rounded. V as a round sucking disc with complete frenum and rather small, somewhat larger than orbit but smaller than snout length. Scales. Both body and head entirely naked without any scales. Head lateral-line system Head canals: whole head lacking any canal and head pores. Sensory papillae: series of infraorbital sensory papillae, all representing a typically longitudinal pattern. Row a long and extending to snout, which upward to surrounded eye diameter in interorbital region. Row b rather long, starting above middle of dermal ridge. Row c mainly below dermal fold and rather long. A single cp located below rear Row c. Row d slightly shorter than row c. Row f paired only as two papillae. Opercle with three rows ot, os, and oi. Rows os and ot well separated. Rows z as a single vertical row. Other papillae are shown in detail in Fig. 3. Coloration when fresh Body and head light creamy yellow to yellowish brown background. Head and body with many tiny brownish to blackish melanophores. Second dorsal fin translucent with tiny brown spots. Caudal fin with many tiny brown spots. Anal fins pale yellow and translucent, spotless, and darker in their rays. Pectoral fin creamy yellow with anterior 2 / 3 region with tiny brownish to black spots (Fig. 4). Pelvic fin whitish.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFACFFD956E5FF5BE5850F15.taxon	distribution	Distribution Till present, this species is only known from the Matsu Islands, Lianjiang County of Taiwan. It is an intertidal species on the island.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFACFFD956E5FF5BE5850F15.taxon	etymology	Etymology The specific name, matsuensis, refers to the type locality from the Matsu Islands, Taiwan.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFACFFD956E5FF5BE5850F15.taxon	discussion	Remarks The current new species, Luciogobius matsuensis n. sp., is rather similar to Luciogobius ryukyuensis Chen et al., 2008 by having a lower count of pectoral fin rays with one free ray above the pectoral fin compared to any other congeneric species. However, it can be well distinguished from Luciogobius ryukyuensis by the following features: (1) fin rays: second dorsal fin rays I / 12 vs. I / 11; anal fin rays I / 12 vs. I / 11; and (2) vertebral count: anterior region as abdomen vertebrae always 17 vs. 16. Luciogobius matsuensis n. sp. can also be distinguished from Luciogobius guttatus Gill, 1859 by the following combination of features: (1) pectoral fin rays 16 vs. 18 – 19; and (2) anal fin rays I / 12 vs. I / 13.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFA9FFD656E5FC2BE3B50ADB.taxon	description	(Figs. 5 – 7)	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFA9FFD656E5FC2BE3B50ADB.taxon	vernacular_names	[New English name: Dongyin earthworm goby] [Chinese name: Þm ṃḛ]	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFA9FFD656E5FC2BE3B50ADB.taxon	materials_examined	Material examined Holotype. NTOUP- 2023 - 05 - 305, 58.2 mm SL, Beiao, Dongyin Island, Matsu Islands, Lianjiang County, coll. W. Y. Zhang, 21 March, 2024.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFA9FFD656E5FC2BE3B50ADB.taxon	diagnosis	Diagnosis Luciogobius dongyinensis can be distinguished from all other congeneric species by the following unique combination of features: (1) second dorsal fin rays: I / 16 and anal fin rays I / 16; (2) pectoral fin rays modally 14 and with three upper, very short free soft rays; (3) vertebral count: 18 + 23 = 41; and (4) specific coloration: a long infraorbital deep brown stripe below eye; a long deep brown stripe above and along upper jaw; pectoral fin with many small patches of melanophores except posterior, distal 1 / 5 region; and caudal fin brown with many light rounded spots.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFA9FFD656E5FC2BE3B50ADB.taxon	description	Description Body very slender, cylindrical anteriorly and somewhat compressed posteriorly (all morphometric data is shown in Table 1). Head flat and depressed. Cheek slightly fleshy. Eye small. A horizontal dermal fold with papillae row on upper part of cheek and below orbit. Snout flat and short. Anterior nasal opening as a protruded, horizontal short tube and posterior nasal opening as a round hole. Interorbital region rather wide. Mouth oblique and large, maxillary extending beyond middle vertical of orbit. Lower jaw more prominent compared to upper jaw. Teeth rather minute, with 4 – 5 rows of tiny conical teeth, with outer rows larger in both jaws. Tongue somewhat pointed, but anterior tip bilobed. Gill-opening rather restricted, extending merely slightly below lower margin of pectoral base. Anus located in posterior half of body. Vertebral count 18 + 23 = 41. Fins. D 2 I / 16, A I / 16, P 14. D 1 absent. D 2 with middle one third portion of rays longest. A shape similar to D 2. Both first spines in D 2 and A relatively short. A origin in front of D 2 origin. D 2 origin inserted vertically between 1 st and 2 nd branched rays of A. Both rear tips of D 2 and A far from procurrent rays of C when depressed. P rounded and its length much shorter than postorbital length. P with three free soft rays on upper margin near upper basal region. C elliptical. V as a round sucking disc with complete frenum and rather small. Scales. Both body and head entirely naked without any scales. Head lateral-line system Head canals: whole head lacking any canal and head pores. Sensory papillae: series of infraorbital sensory papillae, all representing a typically longitudinal pattern. Row a long and extending to snout, which upward to surrounded eye diameter in interorbital region. Row b rather long starting above middle of dermal ridge. Row c mainly below dermal fold and rather long. A single cp located below rear Row c. Row d slightly shorter than row c. Row f paired only as two papillae. Opercle with three rows ot, os, and oi. Rows os and ot well separated. Rows z as single vertical row. Other papillae are shown in detail in Fig. 6. Coloration when fresh Body and head light creamy yellow to yellowish brown background. Head and body with small, tiny deep brown spots. A long, infraorbital deep brown stripe below eye. A long deep brown stripe above and along upper jaw. Belly yellowish with about 5 major brown cross bands anteriorly. Second dorsal fin brown with tiny white spots. Anal fin whitish or yellowish. Pectoral fin with many small patches of melanophores except posterior, distal 1 / 5 region (Fig. 7). Caudal fin brown with many light, rounded spots. Pelvic fin creamy white.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFA9FFD656E5FC2BE3B50ADB.taxon	distribution	Distribution Till present, this species is only known from the Dongyin Island, Matsu Islands, Lianjiang County of Taiwan. It is an intertidal species on the island.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFA9FFD656E5FC2BE3B50ADB.taxon	etymology	Etymology The specific name, dongyinensis, refers to the type locality from the Dongyin Island, Matsu Islands, Taiwan.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
03BBB75EFFA9FFD656E5FC2BE3B50ADB.taxon	discussion	Remarks The current new species, Luciogobius dongyinensis n. sp., is rather similar to Luciogobius grandis Arai, 1970 by having upper free rays of pectoral fin with 3 – 4 free rays above the pectoral fin compared to any other congeneric species. However, the new species, Luciogobius dongyinensis n. sp., can be well distinguished from the endemic, Japanese Luciogobius grandis by the following features: (1) fin rays: second dorsal fin rays I / 16 vs. I / 15; anal fin rays I / 16 vs. I / 15; (2) presence of free rays: pectoral fin upper free rays 3 vs. 4; lower free rays 0 vs. 2; and (3) vertebral count 18 + 23 = 41 vs. 19 + 22 = 41.	en	Chen, I-Shiung, Shao, Yi-Ta, Chou, Li-Chin, Chen, Kuo-Shu, Chang, Chih-Wei (2024): Two new species of Luciogobius Gill (Teleostei: Gobiidae) from the Matsu Islands in Taiwan. Zootaxa 5550 (1): 189-199, DOI: 10.11646/zootaxa.5550.1.19, URL: https://doi.org/10.11646/zootaxa.5550.1.19
