Eulophias

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Eulophias
Eulophias tanneri

Eulophias tanneri

Systematics
Perch relatives (Percomorphaceae)
Order : Perch-like (Perciformes)
Subordination : Cottoidei
Partial order : Eel mother relatives (Zoarcales)
Family : Eulophiidae
Genre : Eulophias
Scientific name
Eulophias
Smith , 1902

Eulophias is a species of fish from the group of eel mother relatives (Zoarcales)that is poor in species and includes only two species. The two species occur in the northeastern Pacific, on the coast of Japan and the Sea of Japan, andon the southern coast of Korea.

features

Eulophias species are small, very elongated fish that reach a body length of 16 to 17 cm. Of the numerous rays of the long dorsal fin (approx. 130 to 143), most are hard rays, while only a few soft rays are to be found. The hard rays are also more numerous than the soft rays in the anal fin (approx. 75 to 103 fin rays). Ventral fins are missing. The caudal fin has 7 to 10 fin rays. It overlaps with the posterior dorsal and anal fin. The caudal fin skeleton consists of two to three elongated, free-standing bones called epuralia. The number of vertebrae is 133 to 143. Palatine teeth are missing, the number of Branchiostegal rays is 6. Pyloric tubes are missing. The paired parietal bones have no contact with each other.

Systematics

The genus and the type species Eulophias tanneri were described in 1902 by the American ichthyologist Hugh McCormick Smith . In 1954, two Japanese scientists described another species, Eulophias owashii , which was only known from a single specimen and was synonymous with Eulophias tanneri in 2012 . The second species of the genus, Eulophias koreanus , was described in September 2012.

The genus, which was previously assigned to the eel mother (Zoarcidae) or the spine back (Stichaeidae), was placed in a new family, the Eulophiidae, in December 2013, because the genetic distance of Eulophias to other eel mother relatives is very high and comparable to the distance of others Family-level taxa. The Eulophiidae are said to be the sister group of eel mothers and sea ​​wolves . The Eulophiidae family was recognized in 2016 in the 5th edition of Fishes of the World , a standard work on fish systematics. In 2015, Radchenko also included Azygopterus corallinus and Leptostichaeus pumilus in the Eulophiidae family, which thus includes three genera with four species.

species

literature

  • Hyuck Joon Kwun & Jin-Koo Kim: Molecular phylogeny and new classification of the genera Eulophias and Zoarchias (PISCES, Zoarcoidei). Molecular Phylogenetics and Evolution, Volume 69, Issue 3, December 2013, pages 787-795, doi: 10.1016 / j.ympev.2013.06.025
  • Hyuck Joon Kwun & Jin Koo Kim: A New Species of the Genus Eulophias (Zoarcoidei: Stichaeidae) from Korea. Zootaxa 3493: 27-34 (Sept. 21, 2012), abstract
  • Joseph S. Nelson , Terry C. Grande, Mark VH Wilson: Fishes of the World . John Wiley & Sons, 2016, ISBN 978-1-118-34233-6 .

Individual evidence

  1. ↑ OA Radchenko: The system of the suborder Zoarcoidei (Pisces, Perciformes) as inferred from molecular genetic data. Russian Journal of Genetics, November 2015, Volume 51, Issue 11, pp 1096–1112, DOI: 10.1134 / S1022795415100130

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