Opisthocentridae

Opisthocentridae
Kasatkia seigeli in the Point Lobos State Reserve
Systematics
Spinefish (Acanthopterygii) Perch relatives (Percomorphaceae) Order : Perch-like (Perciformes) Subordination : Cottoidei Partial order : Eel mother relatives (Zoarcales) Family : Opisthocentridae
Scientific name
Opisthocentridae
Jordan & Evermann , 1898

The Opisthocentridae are a fish family from the group of eel mother relatives (Zoarcales). All twelve species in the group are bottom-dwelling marine fish found in the cool waters of the northwest or eastern Pacific.

features

The body of the Opisthocentridae is elongated and in most cases relatively high. The number of vertebrae is 52 to 72. The different types of Opisthocentridae are 5.5 to 46 cm long. The head has no skin flaps or other skin protrusions. The anal fin has one or two fin spines. The pectoral fins are large; the number of pectoral fin rays is 12 to 21. The pelvic fins can be small, with one hard and three soft rays, or are rudimentary or completely absent ( Kasatkia also has no pelvic girdle). The head can be scaled, scaly or only the cheeks are scaled. The number of Branchiostegal rays is five or six. The canals of the lateral line system on the head are well developed. On the body there is a mediolateral line of neuromasts and a dorsal one.

Almost nothing is known about the way of life of the Opisthocentridae.

Systematics

The Opisthocentridae were scientifically introduced in 1898 as a subfamily of the spine backs (Stichaeidae) by the American ichthyologists David Starr Jordan and Barton Warren Evermann . In 2015, the Russian scientist OA Radchenko made the Opisthocentridae an independent family after he determined with the help of molecular biological data that they are more closely related to the butterfish (Pholidae) than to the spine backs. This was adopted in the Catalog of Fishes in mid-2018.

Genera and species

• Genus Askoldia
  • Askoldia variegata
• Genus Kasatkia
  • Kasatkia memorabilis
  • Kasatkia seigeli
• Genus Lumpenopsis
  • Lumpenopsis clitella
  • Lumpenopsis hypochroma
  • Lumpenopsis pavlenkoi
  • Lumpenopsis triocellata
• Genus Opisthocentrus
  • Opisthocentrus ocellatus
  • Opisthocentrus tenuis
  • Opisthocentrus zonope
• Genus Pholidapus
  • Pholidapus dybowskii
• Genus Plectobranchus
  • Plectobranchus evides

literature

• California Academy of Sciences, Catherine W. Mecklenburg, Boris A. Sheiko: Annotated Checklists of Fishes. Family Stichaeidae Gill 1864, pricklebacks. 2004. PDF , ISSN  1545-150X

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
2. ↑ Eschmeyer, WN & Fong, JD: Catalog of Fishes Species by Family / Subfamily, accessed on July 13, 2018

Web links

• Opisthocentridae on Fishbase.org (English)