Supriya Ghosh

Helogenes

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Kingdom  Animalia
Scientific name  Helogenes
Rank  Genus
Family  Cetopsidae
Phylum  Chordata
Order  Catfish
Helogenes wwwscotcatcomimageshmarmorates4jpg
Subfamily  Helogeneinae Regan, 1911
Lower classifications  Helogenes marmoratus, Helogenes gouldingi, Helogenes castaneus, Helogenes uruyensis

Helogenes marmoratus


Helogenes is a genus of whale catfish found in tropical South America.

Contents

Helogeneinae is the sister taxon of Cetopsinae, the other subfamily in the family Cetopsidae.

Denticetopsis and helogenes


Species

There are currently four recognized species in this genus:

  • Helogenes castaneus (Dahl, 1960)
  • Helogenes gouldingi Vari & H. Ortega, 1986
  • Helogenes marmoratus Günther, 1863
  • Helogenes uruyensis Fernández-Yépez, 1967
  • Distribution

    Helogenes species occur through much of the Amazon River basin, the southern portions of the Orinoco River basin, the coastal rivers of the Guianas, and at least the lower portions of the Tocantins River.

    Description

    In Helogenes, the dorsal fin base is short, the anal fin base is elongate, the dorsal and pectoral fins lack spines, the adipose fin is usually present, but is reduced or absent in one population of one species. Helogenes species grow to about 4.3–7.3 centimetres (1.7–2.9 in) SL.

    Ecology

    Helogenes species feed on allochthonous insects. The only species for which details of the ecology are known is H. marmoratus (refer to article for that species).

    References

    Helogenes Wikipedia


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