Gogangra

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Gogangra
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Sisoridae
Subfamily: Sisorinae
Genus: Gogangra
Roberts, 2001
Type species
Pimelodus viridescens
Hamilton, 1822
Binomial name

Gogangra laevis
Ng, 2005
Gogangra viridescens
(Hamilton, 1822)
Synonyms

Gangra
Roberts & Ferraris, 1998

Gogangra is a genus of catfishes (order Siluriformes) of the family Sisoridae. It includes two species, G. laevis and G. viridescens.[1][2]

Contents

[edit] Taxonomy

G. viridescens was previously placed in the genus Nangra. In 1998, the genus was given the name Gangra, but this name was already preoccupied by the genus Gangra of lepidopterans, so Gogangra was proposed as a replacement name in 2001.[3] G. laevis was described in 2004.[3]

[edit] Distribution

Gogangra species are distributed in the Ganges, Meghna, and Brahmaputra drainages, India and Bangladesh. G. viridescens is known from the Ganges and Brahmaputra drainages of India and Bangladesh.[1] It is also reported from the Indus drainage in Pakistan, Nepal, and Bhutan.[4] G. laevis is from the Yamuna and Meghna River drainages of the lower Brahmaputra River drainage in Bangladesh.[1][5]

G. viridescens is found in the upper reaches of rivers.[4]

[edit] Description

Gogangra species have a depressed head, small conical teeth in the lower jaw, the branchiostegal membranes free from isthmus, small serrations on the anterior margin of the pectoral spine (and a smooth posterior edge), no well-developed maxillary barbel membrane, the outer and inner mental barbels widely separated with the origin of inner barbels anterior to origin of outer barbels, short nasal and maxillary barbels, and palatal teeth absent.[1] Live specimens have a viridescent or silvery supraopercular mark.[1]

Gogangra species grow to about 8.0–8.5 centimetres (3.2–3.4 in) in length.[5][4]

[edit] References

  1. ^ a b c d e Thomson, Alfred W.; Page, Lawrence M. (2006). "Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes)" (PDF). Zootaxa 1345: 1–96. 
  2. ^ Ferraris, Carl J., Jr. (2007). "Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types" (PDF). Zootaxa 1418: 1–628. 
  3. ^ a b Ng, Heok Hee (September 2005). "Gogangra laevis, a new species of riverine catfish from Bangladesh (Teleostei: Sisoridae)". Ichthyol. Explor. Freshwaters 16 (3): 279–286. 
  4. ^ a b c "Gogangra viridiscens". FishBase. Ed. Ranier Froese and Daniel Pauly. July 2007 version. N.p.: FishBase, 2007.
  5. ^ a b "Gogangra laevis". FishBase. Ed. Ranier Froese and Daniel Pauly. July 2007 version. N.p.: FishBase, 2007.
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