Ceratothoa Dana, 1852

Martin, Melissa B., Bruce, Niel L. & Nowak, Barbara F., 2013, Redescription of Ceratothoa carinata (Bianconi, 1869) and Ceratothoa oxyrrhynchaena Koelbel, 1878 (Crustacea: Isopoda: Cymothoidae), buccal-attaching fish parasites new to Australia, Zootaxa 3683 (4), pp. 395-410 : 396

publication ID

https://dx.doi.org/10.11646/zootaxa.3683.4.4

publication LSID

lsid:zoobank.org:pub:EDAF3EEA-D5AB-4BDC-9AC8-4B36C3AE13C

DOI

https://doi.org/10.5281/zenodo.3499976

persistent identifier

https://treatment.plazi.org/id/A51B8408-FF86-E272-FF6B-91EDFC9DA7B2

treatment provided by

Plazi

scientific name

Ceratothoa Dana, 1852
status

 

Genus Ceratothoa Dana, 1852

Ceratothoa Dana, 1852: 203 ; 1853: 747.— Miers, 1876: 104 –105.— Schioedte and Meinert, 1883: 322.— Richardson, 1905: 233.— Bowman, 1978: 217 –218.— Brusca, 1981: 177.— Bruce and Bowman, 1989: 1.— Horton, 2000: 1041.

Codonophilus Haswell, 1881: 471 ; 1882: 283.— Hale, 1926: 201, 223.

Rhexana Schioedte and Meinert, 1883: 289 .

Cteatessa Schioedte and Meinert, 1883: 296 .

Meinertia Stebbing, 1893: 354 ; 1900: 642; 1910: 103.— Richardson, 1905: 236.— Menzies, 1962: 116.— Schultz, 1969: 156.

Rhexanella Stebbing, 1911: 179 .

Not Ceratothoa: Dana, 1853: 747 .— Richardson, 1905: 236.— Schultz, 1969: 155.— Kussakin, 1979: 287 [= Glossobius Schioedte and Meinert, 1883 ].

Type species. The type species for Ceratothoa can only be Cymothoa gaudichaudii Milne Edwards, 1840 or Cymothoa parallela Otto, 1828 , these being the two species included in the genus by Dana (1852). The type specimen of Ceratothoa parallela was originally deposited in Museum of Göttingen ( Schioedte & Meinert 1883) but is no longer extant ( Bruce and Bowman 1989; Horton 2000; Hadfield 2012). Trilles (1972 b) examined a female (no. 48) and male (no. 49) Ceratothoa gaudichaudii held at the MNHN and labelled as M. Gaudichaud’s material. The male specimen (labeled ‘type’), cannot be the specimen (2 pouces, c. 25 mm) described by Milne Edwards (1840) according to Trilles (1972 b) and Horton (2000) due to its small size (19 mm). Horton (2000) cites the female examined by Trilles as a lectotype, although no author has made a lectotype desgination. According to Hadfield (2012), both specimens attributed to M. Gaudichaud should be regarded as syntypes, with the male being the accompanying male to the female. Milne Edwards did not (for any of this species) indicate the number of specimens that he had at hand, and we agree with Hadfield’s (2012) interpretation. The female ‘syntype’ for Ceratothoa gaudichaudii is apparently missing ( Hadfield 2012) or near destroyed ( Trilles 1972 b), the bottle containing only the male syntype collected in Chile, Coquimbo (MNHN-Is 315).

Remarks. Characters that define Ceratothoa include contiguous antennal bases, pereonite 1 longest, body widest at pereonite 4 or 5 and subequal uropod rami that are equal in length or extend to the posterior margin of the pleotelson. Ceratothoa is closely related to other buccal-attaching isopods such as Cinusa Schioedte and Meinert, 1884 , Glossobius Schioedte and Meinert, 1883 and Cymothoa Fabricius, 1793 . Cinusa differs from Ceratothoa in the following characters: body ovoid, asymmetrical; pereonite 1 short, with rounded anterolateral margins that do not project anteriorly; pereonite 3 to 4 widest anteriorly; pereonite 1 and antennae bases close-set, almost contiguous ( Hadfield et al. 2010). Cymothoa differs from Ceratothoa by having basal articles of the antennule widely separated and not expanded ( Hadfield et al. 2011), and in having fleshy and thick folds on the pleopods.

Glossobius and Ceratothoa are very similar and have in the past been considered synonymous by Stebbing (1893). Bowman (1978) resolved the nomenclature ambiguities of Ceratothoa and Glossobius and recommended that species records of Ceratothoa found on flying fish should be transferred to Glossobius Schioedte and Meinert, 1883 . Bruce and Bowman (1989) considered the characters that separate adult females of the two genera to be unambiguous. Ceratothoa has the anterolateral margins of pereonite 1 projecting forward, the anterior margin of pereonite 1 recessed, and pereonite 6 longer than Glossobius .

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Isopoda

Family

Cymothoidae

Loc

Ceratothoa Dana, 1852

Martin, Melissa B., Bruce, Niel L. & Nowak, Barbara F. 2013
2013
Loc

Rhexanella

Stebbing 1911: 179
1911
Loc

Meinertia

Schultz 1969: 156
Menzies 1962: 116
Richardson 1905: 236
Stebbing 1893: 354
1893
Loc

Rhexana

Schioedte 1883: 289
1883
Loc

Cteatessa

Schioedte 1883: 296
1883
Loc

Codonophilus

Hale 1926: 201
Haswell 1881: 471
1881
Loc

Ceratothoa:

Kussakin 1979: 287
Schultz 1969: 155
Richardson 1905: 236
Dana 1853: 747
1853
Loc

Ceratothoa

Horton 2000: 1041
Bruce 1989: 1
Brusca 1981: 177
Bowman 1978: 217
Richardson 1905: 233
Schioedte 1883: 322
Miers 1876: 104
Dana 1852: 203
1852