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aqua International Journal 2(4)



Volume 2, Issue 4 – December 1997

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Volume 2, Issue 4 – December 1997

W. Ivantsoff, Aarn, Margaret A. Shepherd and G. R. Allen: Pseudomugil reticulatus (Pisces: Pseudomugilidae) a review of the species originally described from a single specimen, from Vogelkop Peninsula, Irian Jaya with further evaluation of the systematics of Atherinoidea, pp. 53-64


Pseudomugil reticulatus, hitherto only known from a single specimen from Vogelkop Peninsula, Irian Jaya is redescribed on the basis of selected specimens collected din the environs of Timika and Tembagapura, (approx. 4° 23’S 136°53’E) Irian Jaya. Examination of a large number of specimens allows for a much more accurate description of meristics, morphometrics, coloration, and sexual dimorphism. Osteological study of P. reticulatus provides a clear cut diagnosis of the species. Although the present study does not contradict the hypothesized systematic position of Pseudomugilidae, it suggests that Telmatherinidae, Pseudomugilidae and Melanotaeniiae may form a transformation series. The latest definition of the family Pseudomugilidae and the genus Pseudomugil are given.

J. Géry & U. Römer: Tucanoichthys tucano gen. n. sp. n., a new miniature characid fish (Teleostei, Characiformes, Characidae) from the Rio Uaupés basin in Brazil, pp. 65-72


A new dwarf genus and species, Tucanoichthys tucano, less than 17 mm in maximal standard length, is described. It comes from a brook tributary of the Rio Uaupés, upper Rio Negro basin, in Brazil. Its affinities are discussed. It belongs to the Characidae in the broad sense, but could not as yet be attached to a particular subfamily. Its ecology and behaviour are also described, following observations in the field as well as in the aquarium.

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Dimensions 266 × 203 × 3 cm
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