A new genus and two new species of gobiid fishes (Perciformes) from the Chagos Archipelago, Central Indian Ocean
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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.
KeywordsGobiidae Trimmatom n. gen. T. nanus T. offucius Smallest vertebrate Habitat Osteologyz
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- Akihito, Prince. 1969. A systematic examination of the gobiid fishes based on the mesopterygoid, postcleithra, branchiostegals, pelvic fins, scapula, and suborbital. Jap. J. Ichthyol. 16: 93–114.Google Scholar
- Birdsong, R.S. 1975. The osteology ofMicrogobius signatus Poey (Pisces : Gobiidae), with comments on other gobioid fishes. Bull. Florida State Mus., Biol. Sci. 19: 135–187.Google Scholar
- Bruun, A.F. 1940. A study of a collection of the fishSchindleria from south Pacific waters. Dana Rept. 21: 1–12.Google Scholar
- Hoese, D.F. 1976. Higher classification of gobioid fishes. Rev. Trav. Inst. Peches marit. 40: 605.Google Scholar
- Hoese, D.F. & E.B. Brothers. 1976.Paratrinuma, a new genus of gobiid fishes and two new species. Copeia 1976: 494–497.Google Scholar
- Lachner, E.A. & S. Karnella. 1978. Fishes of the genusEviota of the Red Sea with descriptions of three new species (Teleostei: Gobiidae). Smith, Contrib. Zool. 286: 1–23.Google Scholar
- Lachner, E.A. & S. Karnella. 1980. Fishes of the Indo-Pacific genusEviota, with descriptions of eight new species (Teleostei: Gobiidae). Smith. Contrib. Zool. 315: 1–127.Google Scholar
- Miller, P.J. 1973. The osteology and adaptive features ofRhracichthys aspro (Teleostei: Gobioidei) and the classification of gobioid fishes. J. Zool Lond. 171: 397–434.Google Scholar
- Te Winkel, L.E. 1935. A study ofMistichthys luzonensis with special reference to conditions correlated with reduced size. J. Morph. 58: 463–535.Google Scholar