taxonID	type	description	language	source
005D09A3E77A3F5D1977390BEE730ADA.taxon	materials_examined	Material examined. Holotype. United States National Museum, USA (USNM 41008) - female (21 mm TL; 8 mm W), from Port San Pio, Philippines, near mouth of a small stream, host unknown, 11 Nov 1908 (Richardson 1910).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
005D09A3E77A3F5D1977390BEE730ADA.taxon	description	Description. Holotype female. Length 21 mm, width 8 mm. Body oval, twice as long as greatest width, dorsal surfaces smooth and polished in appearance, widest at pereonite 5, most narrow at pereonite 7, lateral margins posteriorly ovate. Cephalon 0.5 times longer than wide, visible from dorsal view, triangular. Frontal margin rounded to form blunt rostrum. Eyes oval with distinct margins, one eye 0.3 times width of cephalon, 0.5 times length of cephalon. Antennula more stout but same length as antenna, same length as antenna, with 7 articles. Antenna with 7 articles; antennae extending to middle of the eye. Pereonite 1 with a slight dorsomedial projection, anterior border straight, anterolateral angles extending to anterior margin of eyes with wide truncated and dorsally projected ridges, slight depression at base of each ridge. Posterior margins of pereonites smooth and straight, with posteroventral angles rounded. Coxae 4 - 7 rounded; not extending past pereonite margin. Pereonites 1 - 5 increasing in length and width, 6 - 7 decreasing in length and width, becoming more progressively rounded posteriorly. Pleon with pleonite 1 most narrow, visible in dorsal view; pleonites posterior margin smooth, mostly concave; pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 narrowly rounded. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 posterior margin produced medially. Pleotelson 0.6 times as long as anterior width, dorsal surface smooth, lateral margins posteriorly narrow, posterior margin subtruncate and shallowly emarginate. Pereopod 1 basis 1.6 times as long as greatest width; ischium 0.8 times as long as basis; merus proximal margin with bulbous protrusion; carpus with straight proximal margin; propodus 1.2 times as long as wide; dactylus slender, 1.5 as long as propodus, 3 times as long as basal width. Pereopod 7 basis 0.8 times as long as greatest width; ischium as long as basis, with a large proximal bulbous protrusion; merus proximal margin with large bulbous protrusion, merus 0.5 times as long as wide, 0.3 times as long as ischium; carpus 0.8 times as long as wide, 1.1 times as long as ischium, without bulbous protrusion; propodus 1.3 times as long as wide, 0.5 times as long as ischium; dactylus slender, 1.7 times as long as propodus, 3.3 times as long as basal width. Uropod same length or slightly longer than the pleotelson; peduncle 1.3 times longer than rami, peduncle lateral margin without setae; rami subequal, extending beyond pleotelson, marginal setae absent. Endopod 2.6 times as long as greatest width, straight medial margin, convex lateral margin, apically slightly pointed; exopod 2.3 times as long as greatest width, extending to end of endopod, apically rounded.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
005D09A3E77A3F5D1977390BEE730ADA.taxon	description	Size. Female: 17.5 - 21.5 mm TL (9 mm W); male: 7 mm TL (Bruce and Bowman 1989, Williams et al. 2000).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
005D09A3E77A3F5D1977390BEE730ADA.taxon	distribution	Distribution. Known from the western and central Indo-Pacific region: Philippines (Richardson 1910); Indonesia (Nierstrasz 1931, Bruce and Bowman 1989); Guam, Micronesia (Williams et al. 2000); and India (Ravichandran et al. 2011, Rameshkumar et al. 2013). The record in Guam extends the range of this species by 2060 km and since this species has only ever been found on the one host species, the isopod range might extend even further as the host has a wider known geographic range in the Indo-Pacific. Ravichandran et al. (2011) recorded this species from India supporting suggestions by Bruce and Bowman (1989) and Williams et al. (2000) that Ceratothoa angulata may have a similar distribution to its host.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
3C9C8686F2656C8E36F0B04BC845C332.taxon	materials_examined	Material examined. Lectotype [here designated]. National Museum of Natural History, Paris (MNHN-IU- 2014 - 17477) - female (16 mm TL, 8 mm W) collected in buccal cavity of Capros aper off coast of Nouvelle (Aude, France, Mediterranean), 400 - 500 m depth, sample (n ° 81) (Trilles 1964 a, 1972 a). Also noted: dissected maxilliped, P 5 - P 7 damaged or missing, pleopod 1 - 2 missing, uropods missing, antennae on one side missing. Paralectotype. Male (6 mm TL), same data as lectotype (MNHN-IU- 2007 - 4028) (Trilles 1964 a, 1972 a).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
3C9C8686F2656C8E36F0B04BC845C332.taxon	description	Description. Lectotype female. Length 16 mm, width 8 mm. Body oval, 1.7 times as long as greatest width, dorsal surfaces smooth and polished in appearance, widest at pereonite 5, most narrow at pereonite 1, lateral margins posteriorly ovate. Cephalon 0.5 times longer than wide, visible from dorsal view, triangular. Frontal margin rounded to form blunt rostrum. Eyes oval with distinct margins, one eye 0.3 times width and length of cephalon. Antennula more stout than antenna. Antenna with 8 articles. Pereonite 1 smooth, anterior border straight, anterolateral angle acute, anteriorly produced, extend to anterior margin of eyes. Posterior margins of pereonites smooth and slightly curved laterally. Coxae 2 - 3 narrow; 4 - 7 with rounded point; not extending past pereonite margin. Pereonites 1 - 5 increasing in length and width; 6 - 7 decreasing in length and width; 6 and 7 narrower and becoming more progressively rounded posteriorly. Pleon with pleonite 1 most narrow, visible in dorsal view; pleonites posterior margin smooth, mostly concave. Posterolateral angles of pleonite 2 narrowly rounded. Pereopod 1 basis 1.7 times as long as greatest width; ischium 0.8 times as long as basis; merus proximal margin with bulbous protrusion; carpus with straight proximal margin; propodus 1.6 times as long as wide; dactylus slender, 1.1 times as long as propodus, 2.9 times as long as basal width. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 free, not overlapped by lateral margins of pleonite 4, posterior margin produced medially. Pleotelson 0.6 times as long as anterior width, dorsal surface with 2 sub-medial depressions, lateral margins weakly convex, posterior margin subtruncate.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
3C9C8686F2656C8E36F0B04BC845C332.taxon	description	Size. Female: 13 - 20 mm TL; male: 6 - 7 mm TL; second pullus: 2.5 - 3.5 mm TL (Trilles 1964 a, 1972 a, b).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
3C9C8686F2656C8E36F0B04BC845C332.taxon	distribution	Distribution. Throughout the Mediterranean with records from France (Trilles 1964 a); Tunisia (Trilles and Raibaut 1973); Straits of Gibraltar and the Alboran Sea (southern Iberian Peninsula) (Rodriguez-Sanchez et al. 2001); Turkey (Kirkim et al. 2008, Innal and Kirkim 2012); Cyprus (Kirkim et al. 2009); and Yemen (Al-Zubaidy and Mhaisen 2013). Rodriguez-Sanchez et al. (2001) stated that Ceratothoa capri was found in the Atlantic and Mediterranean Sea including the Bay of Biscay (Bolivar 1892), Canary Islands (Koelbel 1892) and the Iberian Mediterranean (Barcelo Combis 1875, Balcells 1953, Trilles 1977). None of these papers quoted by Rodriguez-Sanchez et al. (2001) mention Ceratothoa capri, and it is possible that these were erroneous reference entries for this species. These references were probably intended for Ceratothoa oestroides, which is mentioned in each of these articles and was also collected by Rodriguez-Sanchez et al. (2001). Junoy and Castello (2003) repeated this lapsus of the references in their checklist for the Iberian Peninsula and Balearic Islands. Rodriguez-Sanchez et al. (2001) also made reference to specific GPS co-ordinates in their paper which appear inaccurate as they correspond to localities on land instead of the expected aquatic points necessary for an oceanographic expedition.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
F370F2DDE1737DBF4C6FE1BF2FA073EC.taxon	materials_examined	Material examined. Neotype [here designated]. South African Musuem, Cape Town (SAMC-A 085795) - female (33 mm TL; 15 mm W), collected from Maputo Bay, Mozambique, from the buccal-cavity of Selar crumenophthalmus, November 2013, coll. Wynand Vlok (HP 221). Paratypes. Three females (27 - 31 mm TL; 12 - 14 mm W), same data as holotype (SAMC-A 085796).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
F370F2DDE1737DBF4C6FE1BF2FA073EC.taxon	description	Description. Neotype female. Length 33 mm, width 15 mm. Body rectangular, 1.8 times as long as greatest width, dorsal surface with medial longitudinal ridge present, widest at pereonites 3 - 5, most narrow at pereonite 1, lateral margins slightly convex. Cephalon 0.6 times longer than wide, visible from dorsal view, subtriangular. Frontal margin rounded to form blunt rostrum. Eyes oval with distinct margins, one eye 0.1 times width of cephalon; 0.2 times length of cephalon. Antennula more stout and same length as antenna, with 7 articles; antennule peduncle articles 1 and 2 distinct and articulated. Antenna with 8 articles. Pereonite 1 with median projection, anterior border straight, anterolateral angle with small distinct produced point, extend to middle of the eye. Posterior margins of pereonites smooth and straight. Coxae 2 - 3 narrow; with posteroventral angles rounded; 4 - 7 with rounded point; not extending past pereonite margin. Pereonites 6 and 7 narrower and becoming more progressively rounded posteriorly. Pleon with pleonite 1 most narrow, visible in dorsal view; pleonites posterior margin with irregular small nodules. Pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 narrowly rounded. Pleonite 5 widest, posterior margin produced medially. Pleotelson 0.5 times as long as anterior width, dorsal surface with 2 sub-medial depressions, lateral margins weakly convex, posterior margin subtruncate and shallowly emarginate. Pereopod 1 basis 1.5 times as long as greatest width; ischium 0.8 times as long as basis; merus proximal margin without bulbous protrusion; carpus with straight proximal margin; propodus 1.7 times as long as wide; dactylus moderately slender, 1.2 times as long as propodus, 2.9 times as long as basal width. Pereopod 7 basis as long as greatest width; ischium 1.2 times as long as basis, with a large proximal bulbous protrusion; merus proximal margin with large bulbous protrusion, merus 0.5 times as long as wide, 0.3 times as long as ischium; carpus 0.7 times as long as wide, 0.3 times as long as ischium, without bulbous protrusion; propodus 1.3 times as long as wide, 0.5 times as long as ischium; dactylus moderately slender, as long as propodus, 2.2 times as long as basal width. Uropod same length as pleotelson, peduncle 0.8 times longer than rami, peduncle lateral margin without setae; rami not extending beyond pleotelson, marginal setae absent, apices narrowly rounded. Endopod apically rounded, 3 times as long as greatest width, lateral margin straight, mesial margin straight, terminating without setae. Exopod extending to end of endopod, 4 times as long as greatest width, apically rounded, lateral margin weakly convex, mesial margin straight, terminating without setae.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
F370F2DDE1737DBF4C6FE1BF2FA073EC.taxon	description	Size. Ovigerous female: 28.5 - 38 mm TL (10 - 14 mm W); non-ovigerous female: 13 - 34 mm TL; male: 10 - 12 mm TL (Bianconi 1869, Schioedte and Meinert 1883, Stebbing 1910, Trilles 1972 b, c).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
F370F2DDE1737DBF4C6FE1BF2FA073EC.taxon	distribution	Distribution. Western Indian Ocean and southwest Pacific Ocean: Mozambique (Bianconi 1869, Hilgendorf 1879, Schioedte and Meinert 1883); Great Redangs, Malay Peninsula (Lanchester 1902); Seychelles (Stebbing 1910); New Caledonia (Trilles 1972 b, c, Bruce 2007); Red Sea (Trilles 2008); Japan (Nunomura 2006, Saito 2009, Nagasawa et al. 2014); and Australia (Martin et al. 2013).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
EECAB52F36D286A042E391D5F2CEFD23.taxon	materials_examined	Material examined. Holotype. National Museum of Natural History, Paris (MNHN-Is 386) - ovigerous female specimen (40 mm TL) collected in Algeria by Lucas (Schioedte and Meinert 1883), host unknown, registered as Meinertia collaris, J. P. Trilles det. 17.12.1971 (n ° 40) (Trilles 1972 b). Also noted: both right antennae are missing and some appendages are broken.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
EECAB52F36D286A042E391D5F2CEFD23.taxon	description	Description. Holotype female. Length 40 mm, width 18 mm. Body oval, 1.8 times as long as greatest width, dorsal surfaces slightly bumpy, widest at pereonite 4 and pereonite 5, most narrow at pereonite 1, lateral margins posteriorly ovate. Cephalon 0.6 times longer than wide, visible from dorsal view, triangular. Frontal margin rounded to form blunt rostrum. Eyes oval with distinct margins. Antennula more stout than antenna, shorter than antenna, with 7 articles. Antenna with 8 articles. Pereonite 1 with slight indentations, anterior border straight, anterolateral angle with distinct anterior projection, extend to middle of the eye. Posterior margins of pereonites smooth and slightly curved laterally. Coxae 2 - 3 narrow; with posteroventral angles rounded; 4 - 7 acute, posteriorly pointed; not extending past pereonite margin. Pereonites 1 - 4 increasing in length and width; 5 - 7 decreasing in length and width; becoming more progressively rounded posteriorly. Pleon with pleonite 1 most narrow, visible in dorsal view; pleonites posterior margin smooth, mostly concave. Pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 narrowly rounded. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 free, not overlapped by lateral margins of pleonite 4, posterior margin produced medially. Pleotelson 0.4 times as long as anterior width, dorsal surface with medial furrow, lateral margins weakly convex, posterior margin damaged and shallowly emarginate. Pereopod 1 basis 1.7 times as long as greatest width; ischium 0.6 times as long as basis; merus proximal margin with bulbous protrusion; carpus with rounded proximal margin; propodus 1.6 times as long as wide; dactylus slender, 0.9 times as long as propodus, 2.1 times as long as basal width. Pereopod 7 basis 1.4 times as long as greatest width; ischium 0.8 times as long as basis, without protrusions; merus proximal margin with large bulbous protrusion, merus 0.4 times as long as wide, 0.3 times as long as ischium; carpus 0.4 times as long as wide, 0.2 times as long as ischium, without bulbous protrusion; propodus 0.9 times as long as wide, 0.4 times as long as ischium; dactylus slender, 1.5 times as long as propodus, 2.3 times as long as basal width. Uropod more than half the length of pleotelson, peduncle 0.9 times longer than rami, peduncle lateral margin without setae; rami not extending beyond pleotelson, marginal setae absent, apices narrowly rounded. Endopod apically rounded, 3.6 times as long as greatest width. Exopod extending to end of endopod, 4 times as long as greatest width, apically rounded.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
EECAB52F36D286A042E391D5F2CEFD23.taxon	description	Size. Female: 18 - 40 mm TL (9 - 18 mm W); male: 9 - 22 mm TL (4 - 10 mm W); second pullus: 2.7 - 2.8 mm TL (0.7 - 0.8 mm W) (Monod 1924 b, Capape and Pantoustier 1976, Dollfus and Trilles 1976, Trilles 1977, 1979, Rokicki 1984 a, b, Bariche and Trilles 2008).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
EECAB52F36D286A042E391D5F2CEFD23.taxon	distribution	Distribution. Mediterranean and eastern Atlantic Ocean: Algeria (Schioedte and Meinert 1883, Lucas 1849, Trilles 1972 b, 1979, Ramdane and Trilles 2008); Morocco (Monod 1924 a, b, Trilles 1972 b, Dollfus and Trilles 1976); Mauritania (Monod 1924 a, b, Trilles 1972 b, 1977, Dollfus and Trilles 1976); Tunisia (Trilles and Raibaut 1973, Capape and Pantoustier 1976); Senegal (Trilles 1979); and Lebanon (Bariche and Trilles 2008). Ceratothoa collaris is common in Tunisia (Trilles and Raibaut 1973) and Mauritania (Monod 1924 a, Trilles 1977). This species has not been collected from the north or north-western Mediterranean countries despite many recent studies there. It has been found in southern areas of the Mediterranean, but never from Libya, Egypt, or Israel.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
891DA9445E5210B2CD0F69887F76DF8D.taxon	materials_examined	Material examined. Lectotype [here designated]. United States National Museum, USA (USNM 1254761) - female (22 mm TL; 9.5 mm W) collected from Mazatlan, Sinaloa (Mexico) in mouth of Mugil hospes (see Richardson 1904). The left side of pereonites 3 - 5 were damaged. Paralectotypes. Two males (11 - 12 mm TL; 4 - 5 mm W), same data as lectotype (USNM 29080).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
891DA9445E5210B2CD0F69887F76DF8D.taxon	description	Description. Lectotype female. Length 22 mm, width 9.5 mm. Body oval, 1.8 times as long as greatest width, dorsal surfaces slightly bumpy, widest at pereonite 4 and pereonite 5, most narrow at pereonite 1, lateral margins posteriorly ovate. Cephalon 0.6 times longer than wide, visible from dorsal view, triangular. Frontal margin rounded to form blunt rostrum. Eyes oval with distinct margins. Antennula more stout than antenna, shorter than antenna, with 7 articles. Antenna with 8 articles. Pereonite 1 with slight indentations, anterior border straight, anterolateral angle with distinct anterior projection, extend to middle of the eye. Posterior margins of pereonites smooth and slightly curved laterally. Coxae 2 - 3 narrow; with posteroventral angles rounded; 4 - 7 acute, posteriorly pointed; not extending past pereonite margin. Pereonites 1 - 4 increasing in length and width; 5 - 7 decreasing in length and width; becoming more progressively rounded posteriorly. Pleon with pleonite 1 most narrow, visible in dorsal view; pleonites posterior margin smooth, mostly concave. Pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 narrowly rounded. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 free, not overlapped by lateral margins of pleonite 4, posterior margin produced medially. Pleotelson 0.4 times as long as anterior width, dorsal surface with medial furrow, lateral margins weakly convex, posterior margin damaged and shallowly emarginate. Pereopod 1 basis 1.7 times as long as greatest width; ischium 0.6 times as long as basis; merus proximal margin with bulbous protrusion; carpus with rounded proximal margin; propodus 1.6 times as long as wide; dactylus moderately slender, 0.9 times as long as propodus, 2.1 times as long as basal width. Pereopod 7 basis 1.4 times as long as greatest width; ischium 0.8 times as long as basis, without protrusions; merus proximal margin with large bulbous protrusion, merus 0.4 times as long as wide, 0.3 times as long as ischium; carpus 0.4 times as long as wide, 0.2 times as long as ischium, without bulbous protrusion; propodus 0.9 times as long as wide, 0.4 times as long as ischium; dactylus slender, 1.5 times as long as propodus, 2.3 times as long as basal width. Uropod more than half the length of pleotelson, peduncle 0.9 times longer than rami, peduncle lateral margin without setae; rami not extending beyond pleotelson, marginal setae absent, apices narrowly rounded. Endopod apically rounded, 3.6 times as long as greatest width. Exopod extending to end of endopod, 4 times as long as greatest width, apically rounded.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
891DA9445E5210B2CD0F69887F76DF8D.taxon	description	Size. Female: 16 - 29 mm TL (8 - 14 mm W) (Brusca 1981).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
891DA9445E5210B2CD0F69887F76DF8D.taxon	distribution	Distribution. Known from the south-western coast of northern America in the Gulf of California region: from southern California, USA (MacGinitie 1937, Brusca 1981, Espinosa-Perez and Hendrickx 2001) and the west coast of Baja California to Puerto Penasco and Mazatlan, Mexico (Richardson 1904, Nierstrasz 1931, Brusca 1977, Brusca 1981, Espinosa-Perez and Hendrickx 2001).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
72587E4D4894E8434563DFB74B5FCAEE.taxon	materials_examined	Material examined. Holotype. Museum of Comparative Zoology, USA (MCZ 3707) - female (12 mm TL; 5 mm W), from the sand goby, Gobius minutus, from Messina, Italy, coll. Haeckel. Specimen with broken antennae and damaged pereonite 2.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
72587E4D4894E8434563DFB74B5FCAEE.taxon	description	Description. Holotype female. Length 12 mm, width 5 mm. Body elongate, 1.9 times as long as greatest width, dorsal surfaces smooth and polished in appearance, widest at pereonite 5, most narrow at pereonite 1, lateral margins slightly convex. Cephalon 0.7 times longer than wide, visible from dorsal view, triangular. Frontal margin rounded to form blunt rostrum. Eyes oval with distinct margins, one eye 0.3 times width of cephalon; 0.6 times length of cephalon. Pereonite 1 smooth, anterior border straight, anterolateral angle with small distinct produced point and produced past frontal margin of cephalon, extend to middle of the eye. Posterior margins of pereonites smooth and straight. With posteroventral angles rounded; coxae 4 - 7 rounded; not extending past pereonite margin. Pereonites 1 - 5 increasing in length and width; 6 - 7 decreasing in length and width; becoming more progressively rounded posteriorly. Pleon with pleonite 1 most narrow, visible in dorsal view; pleonites posterior margin smooth, mostly concave. Pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 narrowly rounded. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 free, not overlapped by lateral margins of pleonite 4, posterior margin produced medially. Pleotelson 0.4 times as long as anterior width, dorsal surface smooth, lateral margins weakly convex, posterior margin subtruncate and shallowly emarginate. Pereopod 1 basis 1.4 times as long as greatest width; ischium 0.7 times as long as basis; merus proximal margin with bulbous protrusion; carpus with rounded proximal margin; propodus 1.7 times as long as wide; dactylus slender, as long as propodus, 3 times as long as basal width. Pereopod 7 basis as long as greatest width; ischium 0.8 times as long as basis, without protrusions; merus proximal margin with large bulbous protrusion, merus 0.4 times as long as wide, 0.3 times as long as ischium; carpus 0.7 times as long as wide, 0.3 times as long as ischium, with slight bulbous protrusion; propodus 1.1 times as long as wide, 0.4 times as long as ischium; dactylus slender, 1.6 times as long as propodus, 2.7 times as long as basal width. Uropod same length or slightly longer than the pleotelson, peduncle 0.6 times longer than rami, peduncle lateral margin without setae; rami extending beyond pleotelson, marginal setae absent, apices narrowly rounded. Exopod extending to end of endopod.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
15F98DDE37EF36B921BF591DB243A32A.taxon	materials_examined	Material examined. Lectotype [here designated]. United States National Museum, USA (USNM 1254762) - female (17 mm TL; 7 mm W), 7 Feb 1908, obtained off Jolo Island, Philippines; from a flying fish 4 - 5 inches long (Richardson 1910). Specimen's left side slightly damaged from pereonite 4 to 6. Paralectotypes. Five females (13.5 - 16 mm TL; 5 - 6 mm W), same data as lectotype (USNM 40914).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
15F98DDE37EF36B921BF591DB243A32A.taxon	description	Description. Lectotype female. Length 17 mm, width 7 mm. Body oval and elongate, twice as long as greatest width, dorsal surfaces smooth and polished in appearance, widest at pereonite 5, most narrow at pereonite 1, lateral margins ovate. Cephalon 0.6 times longer than wide, visible from dorsal view, triangular. Frontal margin rounded to form blunt rostrum. Eyes irregular in outline. Antennula and antenna stout and same length. Antennula with 7 articles, antenna with 8 articles. Pereonite 1 smooth, anterior border straight, anterolateral angle with small distinct anterior projection extending to base of eyes. Posterior margins of pereonites slightly produced medially. Coxae 2 - 3 wide, with posteroventral angles rounded; 4 - 7 large and produced on pereonite margins, not extending past pereonite margin. Pereonites 1 - 5 increasing in length and width; 6 - 7 decreasing in length and width; 2 - 5 subequal. Pleon with pleonite 1 most narrow, visible in dorsal view; pleonites posterior margin smooth, mostly concave. Pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 forming acute point. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 free, not overlapped by lateral margins of pleonite 4, posterior margin produced medially. Pleotelson 0.6 times as long as anterior width, dorsal surface smooth, lateral margins weakly convex, posterior margin shallowly emarginate. Pereopod 1 basis 1.5 times as long as greatest width; ischium 0.8 times as long as basis; merus proximal margin with large bulbous protrusion; carpus with straight proximal margin; propodus as long as wide; dactylus slender, 1.4 times as long as propodus, 2.4 times as long as basal width. Pereopod 7 basis 0.8 times as long as greatest width; ischium 1.3 times as long as basis, with a large proximal bulbous protrusion overlapping merus; merus proximal margin with large distal bulbous protrusion, merus 0.7 times as long as wide, 0.3 times as long as ischium; carpus 0.7 times as long as wide, 0.3 times as long as ischium, without bulbous protrusion; propodus 1.4 times as long as wide, 0.5 times as long as ischium; dactylus slender, 1.4 times as long as propodus, 2.6 times as long as basal width. Uropod more than half the length of pleotelson, peduncle 0.8 times longer than rami.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
15F98DDE37EF36B921BF591DB243A32A.taxon	materials_examined	Other material. Holotype of Ceratothoa venusta. Russian Pacific Federal Fisheries Research Institute (AGK 75054) - on flying fish, Parexocoetus brachypterus, from the Red Sea (Avdeev 1978).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
15F98DDE37EF36B921BF591DB243A32A.taxon	description	Size. Ovigerous females: 14.5 - 23.0 mm TL; non-ovigerous females: 15.5 - 16.5 mm TL; males: 5.4 - 7.4 mm TL (Bruce and Bowman 1989).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
15F98DDE37EF36B921BF591DB243A32A.taxon	distribution	Distribution. Central and Western Indo-Pacific: Philippines (Richardson 1910, Nierstrasz 1931, Bruce and Bowman 1989, Kensley 2001); Red Sea (Avdeev 1978, Bruce and Bowman 1989, Kensley 2001); Madagascar; Australia; and Taiwan (Bruce and Bowman 1989, Kensley 2001).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
98B671D5CDF8D3AE9DB8363713EA4919.taxon	materials_examined	Material examined. Lectotype [here designated]. Zoological Museum, University of Copenhagen (ZMUC CRU- 6914) - female specimen (36 mm TL, 17 mm W) collected in Rijeka, Croatia (previously called Fiume), Adriatic Sea by Budde-Lund (Schioedte and Meinert 1883), host unknown. Also noted: the female has a broken pereonite 1, pleonite 2 and antenna; pereopod 1 missing and other pereopods are damaged and missing dactylii. Paralectotypes. Thirty-seven pullus stage (4 - 5 mm TL), same data as lectotype (ZMUC CRU- 8669); Eighty-two pullus stage (4 - 5 mm TL), same data as lectotype, label reads " Stor female udt. Som pectotype " (ZMUC CRU- 9124).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
98B671D5CDF8D3AE9DB8363713EA4919.taxon	description	Description. Lectotype female. Length 36 mm, width 17 mm. Body rectangular and elongate, 1.7 times as long as greatest width, dorsal surfaces smooth and polished in appearance, widest at pereonite 5 and pereonite 6, most narrow at pereonite 1, lateral margins subparallel. Cephalon 0.5 times longer than wide, visible from dorsal view, triangular. Eyes irregular in outline, one eye 0.2 times width of cephalon; 0.2 times length of cephalon. Pereonite 1 with unique bulbous orientation, anterior border anteriorly produced medially, anterolateral angle wide, with inwardly produced point, extend to anterior margin of eyes. Posterior margins of pereonites slightly produced medially. Coxae 4 - 7 rounded, not extending past pereonite margin. Pereonites 1 - 4 increasing in length and width; 5 - 7 decreasing in length and width; 6 and 7 narrower and becoming more progressively rounded posteriorly. Pleon with pleonite 1 same width as other pleonites (except pleonite 5), visible in dorsal view; pleonites posterior margin smooth, mostly concave. Posterolateral angles of pleonite 2 narrowly rounded. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 free, not overlapped by lateral margins of pleonite 4, posterior margin with 2 indented points. Pleotelson 0.5 times as long as anterior width, dorsal surface with medial furrow, lateral margins weakly convex, posterior margin subtruncate. Pereopod 1 basis 1.5 times as long as greatest width; ischium 0.9 times as long as basis; merus proximal margin with large bulbous protrusion; carpus with straight proximal margin; propodus 1.1 times as long as wide; dactylus slender, 1.2 times as long as propodus, 2.3 times as long as basal width. Pereopod 7 basis 1.2 times as long as greatest width; ischium 0.8 times as long as basis, without protrusions; merus proximal margin with slight bulbous protrusion, merus 0.5 times as long as wide, 0.4 times as long as ischium; carpus 0.5 times as long as wide, 0.3 times as long as ischium, without bulbous protrusion; propodus 1.1 times as long as wide, 0.5 times as long as ischium; dactylus slender, 1.4 times as long as propodus, 2.5 times as long as basal width. Uropod same length as pleotelson, peduncle 0.5 times longer than rami, peduncle lateral margin without setae; rami extending to pleotelson apex, marginal setae absent, apices narrowly rounded.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
98B671D5CDF8D3AE9DB8363713EA4919.taxon	description	Size. Ovigerous female: 15 - 30 mm TL; male: 8 - 15 mm TL; second pullus: 3 mm TL (Montalenti 1948, Trilles 1972 a, Rokicki 1984 b).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
98B671D5CDF8D3AE9DB8363713EA4919.taxon	distribution	Distribution. Mediterranean region and north-western Africa: Adriatic Sea (Schioedte and Meinert 1883, Carus 1885, Oektener and Trilles 2004); Mauritania (Monod 1924 a, 1924 b, Trilles 1972 b); Italy (Montalenti 1948); Galite Islands, Tunisia, France, Morocco (Trilles 1972 b); Montenegro (Trilles et al. 1989); Aegean Sea (Ates et al. 2006); and Algeria (Ramdane et al. 2007).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
BA60720E0EE3743105F25F92537D358C.taxon	materials_examined	Material examined. Lectotype [here designated]. National Museum of Natural History, Paris (MNHN-IU- 2014 - 17478) - female specimen (22 mm TL; 8 mm W), collected from the Mediterranean Sea; J. P. Trilles checked 17.12.1971, host unknown (n ° 6) (Trilles 1972 b). Paralectotype. Female specimen (21 mm TL; 8 mm W), same data as holotype (Trilles 1972 b) (MNHN-IU- 2007 - 4240). Also noted: the two females were in the same bottle as a female Cymothoa parallela (19 mm TL; 6 mm W) (MNHN-IU- 2014 - 17479).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
BA60720E0EE3743105F25F92537D358C.taxon	description	Description. Lectotype female. Length 22 mm, width 8 mm. Body oval and elongate, 1.9 times as long as greatest width, dorsal surfaces smooth and polished in appearance, widest at pereonite 4 and pereonite 5, most narrow at pereonite 1, lateral margins posteriorly ovate. Cephalon 0.6 times longer than wide, visible from dorsal view, triangular. Frontal margin rounded to form blunt rostrum. Eyes oval with distinct margins, one eye 0.3 times width of cephalon; 0.4 times length of cephalon. Antennula more stout than antenna, comprised of 7 articles. Antenna comprised of 8 articles. Pereonite 1 smooth, anterior border straight, anterolateral angle with small distinct produced point, extend to middle of the eye. Posterior margins of pereonites smooth and slightly curved laterally. Coxae 2 - 3 narrow, with posteroventral angles rounded; 4 - 7 rounded, not extending past pereonite margin. Pereonites 1 - 4 increasing in length and width; 5 - 7 decreasing in length and width; 6 and 7 narrower. Pleon with pleonite 1 most narrow and same width as other pleonites, visible in dorsal view; pleonites posterior margin smooth, mostly concave. Pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 narrowly rounded. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 free, not overlapped by lateral margins of pleonite 4, posterior margin with 2 indented points or produced medially. Pleotelson 0.5 times as long as anterior width, dorsal surface with lateral indent, lateral margins weakly convex, posterior margin rounded with medial indent. Pereopod 1 basis 1.7 times as long as greatest width; ischium 0.6 times as long as basis; merus proximal margin with large bulbous protrusion; carpus with rounded proximal margin; propodus 1.5 times as long as wide; dactylus slender, 0.9 times as long as propodus, 2.3 times as long as basal width. Pereopod 7 basis 1.1 times as long as greatest width; ischium 0.9 times as long as basis, with slight bulbous protrusion; merus proximal margin with large bulbous protrusion, merus 0.6 times as long as wide, 0.3 times as long as ischium; carpus 0.7 times as long as wide, 0.3 times as long as ischium, without bulbous protrusion; propodus 1.4 times as long as wide, 0.6 times as long as ischium; dactylus slender, 0.9 times as long as propodus, 2.4 times as long as basal width. Uropod same length or slightly longer than the pleotelson, peduncle 0.8 times longer than rami, peduncle lateral margin without setae; rami extending to pleotelson apex, marginal setae absent, apices narrowly rounded.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
BA60720E0EE3743105F25F92537D358C.taxon	description	Size. Ovigerous female: 12 - 30 mm; non-ovigerous female: 11 - 24.5 mm TL; male: 3.5 - 13 mm TL; second stage pullus: 3.3 - 4 mm TL; first stage pullus: 3.1 mm TL (Schioedte and Meinert 1883, Montalenti 1948, Trilles 1972 a, 1977, 1979, Rokicki 1984 b, Radujkovic et al. 1985).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
BA60720E0EE3743105F25F92537D358C.taxon	distribution	Distribution. Throughout the Mediterranean and eastern Atlantic: especially France and Algeria (Risso 1826, Milne Edwards 1840, Schioedte and Meinert 1883, Thielemann 1910, Trilles 1964 b); Adriatic (Heller 1866, Stalio 1877); Aegean Sea (Horton and Okamura 2001, Trilles 2008); Straits of Gibraltar and the Alboran Sea (Rodriguez-Sanchez et al. 2001); Turkey (Oektener and Trilles 2004, Solak et al. 2007, Innal and Kirkim 2012); and the eastern Atlantic islands and north-west Africa (Barrois 1888, Koelbel 1892, Monod 1924 b, Trilles 1972 b, 1979, Dollfus and Trilles 1976).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
E32D27C82541970110AA6C20844EF943.taxon	materials_examined	Material examined. Lectotype. National Museum of Natural History (Naturalis), Leiden, Netherlands (RMNH. CRUS. I. 7706) - ovigerous female (40 mm TL; 21 mm W), collected from Japan, unknown host, 1823 - 1829, coll: Siebold, Ph. F. v (designated by Yamaguchi 1993). Paralectotypes. Immature female (26 mm TL; 10.5 mm W), two males (16 - 19 mm TL; 7 - 8 mm W), same data as holotype (RMNH. CRUS. I. 39). Female slightly twisted, non-ovigerous, damaged pereopods and pleopods with uropods missing.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
E32D27C82541970110AA6C20844EF943.taxon	description	Description. Lectotype female. Length 40 mm, width 21 mm. Body oval, 1.9 times as long as greatest width, dorsal surfaces slightly bumpy, widest at pereonite 4, most narrow at pereonite 1, lateral margins slightly convex. Cephalon 0.7 times longer than wide, visible from dorsal view, subtriangular. Frontal margin rounded to form blunt rostrum. Eyes irregular in outline. Pereonite 1 with unique bulbous orientation, anterior border slightly indented, anterolateral angle with large wide projections, extend to anterior margin of eyes. Posterior margins of pereonites slightly damaged and bumpy. Coxae 2 - 3 wide; 4 - 7 large and produced on pereonite margins, not extending past pereonite margin. Pereonites subequal. Pleon with pleonite 1 most narrow, visible in dorsal view; pleonites posterior margin not smooth, mostly concave. Pleonite 2 not overlapped by pereonite 7; posterolateral angles of pleonite 2 narrowly rounded. Pleonites 3 - 5 similar in form to pleonite 2; pleonite 5 free, not overlapped by lateral margins of pleonite 4, posterior margin produced medially. Pleotelson 0.5 times as long as anterior width, dorsal surface with lateral indent, lateral margins weakly convex, posterior margin evenly rounded. Antennula more stout than antenna, same length as antenna, consisting of 7 articles. Antenna consisting of 9 articles. Pereopod 1 basis 1.4 times as long as greatest width; ischium 0.7 times as long as basis; merus proximal margin with large bulbous protrusion; carpus with rounded proximal margin; propodus 1.2 times as long as wide; dactylus slender, 0.9 times as long as propodus, 1.9 times as long as basal width. Pereopod 7 basis 0.8 times as long as greatest width; ischium as long as basis, with slight bulbous protrusion; merus proximal margin with large bulbous protrusion, merus 0.4 times as long as wide, 0.3 times as long as ischium; carpus 0.6 times as long as wide, 0.9 times as long as ischium, without bulbous protrusion; propodus 0.7 times as long as wide, 0.4 times as long as ischium; dactylus slender, 1.8 times as long as propodus, twice as long as basal width. Uropod half the length of pleotelson, peduncle as long as rami, peduncle lateral margin without setae; rami not extending beyond pleotelson, marginal setae absent, apices narrowly rounded.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
E32D27C82541970110AA6C20844EF943.taxon	description	Size. Ovigerous females: 27 - 50 mm TL (15.5 - 25.5 mm W); non-ovigerous females 20.5 - 40 mm TL; males 15 - 35 mm TL (11 mm W); larvae 3.5 mm TL (Schioedte and Meinert 1883, Thielemann 1910, Nierstrasz 1931, Trilles 1972 b, Nunomura 1981, Yamauchi and Nunomura 2010).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
E32D27C82541970110AA6C20844EF943.taxon	distribution	Distribution. Known from Japan and surrounding islands (Schioedte and Meinert 1883, Thielemann 1910, Sanada 1941, Trilles 1972 b, Nunomura 1981, Yamauchi and Nunomura 2010).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
949D97CD70C96068F7755104318319DA.taxon	materials_examined	Holotype. Deposition unknown.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
949D97CD70C96068F7755104318319DA.taxon	distribution	Distribution. Australia (Haswell 1881).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
2E795630A782C47319791E32F07B997E.taxon	materials_examined	Material examined. Holotype. United States National Museum, USA (USNM 9728) - immature specimen (17 mm TL; 7 mm W) collected from the Gulf of Mexico, Albatross Station 2395, U. S. F. C., 347 fms (635 metres), host unknown.	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
2E795630A782C47319791E32F07B997E.taxon	distribution	Distribution. Between the Mississippi Delta and Cedar Keys, Florida (Richardson 1900, 1901, 1905, Menzies and Frankenberg 1966, Schultz 1969).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
D7AEE9DF392C0ECFDD168811C0C04D71.taxon	materials_examined	Material examined. Holotype. United States National Museum, USA (USNM 40938) - female (19 mm TL; 8.5 mm W), collected from Opol, Mindanao, Philippines, 4 August 1909, host unknown (Richardson 1910).	en	Hadfield, Kerry A., Bruce, Niel L., Smit, Nico J. (2016): Redescription of poorly known species of Ceratothoa Dana, 1852 (Crustacea, Isopoda, Cymothoidae), based on original type material. ZooKeys 592: 39-91, DOI: http://dx.doi.org/10.3897/zookeys.592.8098, URL: http://dx.doi.org/10.3897/zookeys.592.8098
