Environmental Biology of Fishes

, Volume 6, Issue 2, pp 139–149 | Cite as

A new genus and two new species of gobiid fishes (Perciformes) from the Chagos Archipelago, Central Indian Ocean

  • Richard Winterbottom
  • Alan R. Emery


A recent (1979) expedition to the Chagos Archipelago resulted in the collection of about 40 new taxa of fishes. A new genus,Trimmatom, and two new species,T. nanus andT. offucius, are described here. The new genus is characterized by having all pelvic-fin rays simple (unbranched), a scaleless body, no head pores, a wide gill opening extending anteroventrally to below the eye, and hypurals 1 and 2 fused to the complex formed by the fusion of the ural centrum and hypurals 3 and 4.T. nanuss andT. offucius are differentiated on the basis of fin ray counts and colour pattern.T. nanus is the smallest vertebrate yet to be described. Mature females with ovaries full of eggs are 8–10 mm in standard length.


Gobiidae Trimmatom n. gen. T. nanus T. offucius Smallest vertebrate Habitat Osteologyz 


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Copyright information

© Dr W. Junk Publishers 1981

Authors and Affiliations

  • Richard Winterbottom
    • 1
  • Alan R. Emery
    • 1
  1. 1.Department of Ichthyology and HerpetologyRoyal Ontario MuseumTorontoCanada

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