Wallago

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Wallago
Common helicopter catfish (Wallago attu)

Common helicopter catfish ( Wallago attu )

Systematics
Overcohort : Clupeocephala
Cohort : Otomorpha
Sub-cohort : Ostariophysi
Order : Catfish (Siluriformes)
Family : Real catfish (Siluridae)
Genre : Wallago
Scientific name
Wallago
Bleeker , 1858

Wallago is a genus from the family of the common catfish (Siluridae), which occurs in Asia from Pakistan to Indonesia . It consists of the common helicopter catfish ( Wallago attu ) as the only recent species and the extinct species Wallago maemohensis , whichlivedin the Miocene .

features

They are elongated fish with a large mouth, the crevice of which extends at least to the front edge of the eye, which has a free orbital edge and is not covered by skin. The lower jaw is longer than the upper jaw. The dorsal fin has four or more rays. The caudal fin is forked. The gills have more than 13 Branchiostegal rays .

Systematics

The genus includes two types:

Another possible Wallago species was described by Rudolf Kner in 1866 as Silurodon hexanema , but the status of this species is currently unclear, it could be con-specific with Wallago attu .

For a long time the species Wallagonia leerii and Wallagonia maculatus were also included in the genus Wallago . Due to osteological investigations, however, they were separated into a separate genus, Wallagonia , together with the newly described species Wallagonia micropogon . In addition, it was found that Wallago and Wallagonia are in fact not closely related within the catfish family. The assumed generic affiliation of all these catfish species due to their often overlapping habitats thus turned out to be a fallacy.

swell

  • Martin Hochleithner: Catfish (Siluridae) - biology and aquaculture . Aqua Tech Publications, Kitzbühel 2006, ISBN 3-9500968-7-6 , p. 25, 45 .
  • Roberts, TR (2014): Wallago Bleeker, 1851 and Wallagonia Myers, 1938 (Ostariophysi, Siluridae), Distinct Genera of Tropical Asian Catfishes, with Description of † Wallago maemohensis from the Miocene of Thailand. Bulletin of the Peabody Museum of Natural History, 55 (1): 35-47. doi: 10.3374 / 014.055.0103

Web links

Commons : Wallago  - collection of images, videos and audio files

Individual evidence

  1. ↑ Carl J., Jr. Ferraris: Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalog of siluriform primary types . (PDF) In: Zootaxa . 1418, 2007, pp. 1-628. Retrieved June 25, 2009.
  2. ↑ Roberts, TR (2014): Wallago Bleeker, 1851 and Wallagonia Myers, 1938 (Ostariophysi, Siluridae), Distinct Genera of Tropical Asian Catfishes, with Description of † Wallago maemohensis from the Miocene of Thailand. Bulletin of the Peabody Museum of Natural History, 55 (1): 35-47. doi: 10.3374 / 014.055.0103