Paraxenisthmus springeri, new genus and species of gobioid fish from the West Pacific, and its phylogenetic position within the Xenisthmidae
Gill, A.C.; Hoese, D.F. (1993). Paraxenisthmus springeri, new genus and species of gobioid fish from the West Pacific, and its phylogenetic position within the Xenisthmidae. Copeia 1993(4): 1049-1057
In: Copeia. American Society of Ichthyologists and Herpetologists: New York, N.Y., etc.. ISSN 0045-8511; e-ISSN 1938-5110, more
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| Keywords |
New genus
Taxa > Species > New taxa > New species
Paraxenisthmus Gill & Hoese, 1993 [WoRMS]; Paraxenisthmus springeri Gill & Hoese, 1993 [WoRMS]
Marine/Coastal |
| Abstract |
Paraxenisthmus springeri is described from two specimens from the Solomon Islands. It is unique among xenisthmids in having: vomer with two separate patches of teeth; palatine with elongate patch of teeth; coronomeckelian bone present; dorsal postcleithrum present; ceratobranchial 5 broad; infrapharyn- gobranchial 2 broad, with two anterior cartilage heads and well-developed tooth patch; infrapharyngobranchial 4 present; infrapharyngobranchial 4 toothplate large; and basibranchial 3 present. Based on a cladistic analysis of osteological and external characters, Paraxenisthmus is the sister group of a monophyletic group that includes all other xenisthmid genera (Allomicrodesmus, Rotuma, Tyson and Xenisthmus). Further evidence is presented that Allomicrodesmus, Rotuma, and Tyson form the sister group of Xenisthmus. |
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