Editorial Type:
Article Category: Research Article
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Online Publication Date: 04 Jun 2008

A New Species of Catfish of the Genus Gogo from Northeastern Madagascar (Siluriformes: Anchariidae)

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Page Range: 395 – 400
DOI: 10.1643/CI-07-121
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Abstract

Gogo atratus is a new species of anchariid catfish described from the Mananara du Nord River drainage in northeastern Madagascar. It can be distinguished from congeners by a longer snout (54.8–56.4% HL, vs. 47.1–54.3 in congeners) and faintly mottled dark gray coloration (vs. uniform brown, highly mottled dark gray and cream, or mottled brownish-gray). The following combination of characters further distinguishes Gogo atratus from congeners: dorsal-spine length 17.7–20.6% SL, pectoral-spine length 16.5–18.9% SL, length of adipose-fin base 23.6–27.8% SL, head width 17.8–18.9% SL, interorbital distance 28.9–30.5% HL, eye diameter 13.0–14.3% HL, unicuspid teeth, and straight dorsoposterior margin of dorsal fin.

Copyright: 2008 by the American Society of Ichthyologists and Herpetologists
Fig. 1
Fig. 1

Gogo atratus, AMNH 240660, holotype, 141.2 mm SL, Madagascar, Toamasina province, Mananara du Nord River.

Fig. 2
Fig. 2

Gogo atratus, ca. 190 mm SL (not preserved), illustrating live coloration.

Fig. 3
Fig. 3

Map showing collecting localities of species of Gogo examined.

Fig. 4
Fig. 4

Type locality of Gogo atratus (Mananara du Nord River).

Contributor Notes

Associate Editor: C. J. Ferraris

1 Raffles Museum of Biodiversity Research, Department of Biological Sciences, National University of Singapore, 6 Science Drive 2, Singapore 117546, E-mail: dbsnhh@nus.edu.sg. Send reprint requests to this address.
2 Department of Ichthyology, American Museum of Natural History, Central Park West at 79th Street, New York, New York, 10024, E-mail: jsparks@amnh.org.
3 New York Aquarium, Surf Avenue and West 8th Street, Brooklyn, New York, 11225, E-mail: ploiselle@wcs.org.
Received: 24 May 2007
Accepted: 19 Sept 2007
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