Deep water clumps

The division of living beings into systematics is a continuous subject of research. Different systematic classifications exist side by side and one after the other. The taxon treated here has become obsolete due to new research or is not part of the group systematics presented in the German-language Wikipedia.

The deep-water groups (Abyssocottidae Jordan , 1923) ( size : ἄβυσσος abyssos = bottomless, kottos = head) live endemically in the southern Siberian Lake Baikal at depths of less than 170 meters.

features

The fish reach lengths of 6 to 28 centimeters. They have two dorsal fins . The first, shorter dorsal fin is supported by three to ten spines , the second by 10 to 21 soft rays. The anal fin has 8 to 16 soft rays. The pelvic fins have a fin spine and two to four soft rays. The postcleithra (a bone in the shoulder girdle) is reduced or absent. Deep-water clusters have 30 to 37 eddies .

Systematics

Traditionally, the deep-water groups are viewed as an independent family. Phylogenetically, however, just like the Baikal oilfish (Comephoridae), they are located deep within the family of the bullheads (Cottidae) and even within the genus Cottus . The American ichthyologist Joseph S. Nelson , author of the standard work on fish systematics Fishes of the World , continues to lead the family, although he advocates incorporating them into the Cottidae. In the latest revision of the bony fish, the family rank of deep-water groups is rejected; their genera and species are now counted among the bullheads.

Genera and species

• Genus Abyssocottus
  • Abyssocottus elochini Taliev, 1955 .
  • Abyssocottus gibbosus Berg, 1906 .
  • Abyssocottus korotneffi Berg, 1906 .
• Genus Asprocottus
  • Asprocottus abyssalis Taliev, 1955 .
  • Asprocottus herzensteini Berg, 1906 .
  • Asprocottus intermedius Taliev, 1955 .
  • Asprocottus korjakovi minor Sideleva, 2001 .
  • Asprocottus minor Sideleva, 2001 .
  • Asprocottus parmiferus Taliev, 1955 .
  • Asprocottus platycephalus Taliev, 1955 .
  • Asprocottus pulcher Taliev, 1955 .
• Genus Cottinella
  • Cottinella boulengeri (Berg, 1906) .
• Genus Cyphocottus
  • Cyphocottus eurystomus (Taliev, 1955) .
  • Cyphocottus megalops (Gratzianov, 1902) .
• Genus Limnocottus
  • Limnocottus bergianus Taliev, 1935 .
  • Limnocottus godlewskii (Dybowski, 1874) .
  • Limnocottus griseus (Taliev, 1955) .
  • Limnocottus pallidus Taliev, 1948 .
• Genus Neocottus
  • Neocottus thermalis Sideleva, 2002 .
  • Neocottus werestschagini (Taliev, 1935) .
• Genus Procottus
  • Procottus gotoi Sideleva, 2001 .
  • Procottus gurwicii (Taliev, 1946) .
  • Procottus jeittelesii (Dybowski, 1874) .
  • Procottus major Taliev, 1949 .

literature

• Joseph S. Nelson : Fishes of the World. Wiley, New York 2006, ISBN 0-471-25031-7 .

Web links

• Deep water globs on Fishbase.org (English)

Individual evidence

1. ↑ Tytti Kontula, Sergei V. Kirilchik, Risto Väinölä (2003) Endemic diversification of the monophyletic cottoid fish species flock in Lake Baikal explored with mtDNA sequencing Molecular Phylogenetics and Evolution 27, 1, 143–155.
2. ↑ Betancur-R, R., E. Wiley, N. Bailly, M. Miya, G. Lecointre, and G. Ortí. 2014. Phylogenetic Classification of Bony Fishes --Version 3 ( Archived copy ( memento of the original from August 14, 2015 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. ).