Lycodapus
Lycodapus fierasfer
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Scorpaeniformes
Family: Zoarcidae
Subfamily: Lycodinae
Genus: Lycodapus
Gilbert, 1890
Type species
Lycodapus fierasfer
Gilbert, 1890[1]

Lycodapus is a genus of marine ray-finned fishes belonging to the family Zoarcidae, the eelpouts. The species in this genus are found in the Pacific and Southern Oceans.

Taxonomy

Lycodapus was first proposed as a monospecific genus in 1890 by the American ichthyologist Charles Henry Gilbert when he described Lycodapus fierasfer[1] from the Gulf of California.[2] This genus is classified within the subfamily Lycodinae, one of 4 subfamilies in the family Zoarcidae, the eelpouts.[3] This genus is the sister taxon to Bothrocara, Bothrocarina and Lycogrammoides, and these four genera form a clade within the subfamily Lycodinae.[4]

Etymology

Lycodapus is a compound of the Greek word or "wolf", lykos, a reference to the type genus of the Lycodinae, abd apous, which means "without feet", an allusion to the lack of pelvic fins in this genus.[5]

Species

Lycodapus contains the following species:[6]

  • Lycodapus antarcticus Tomo, 1982
  • Lycodapus australis Norman, 1937
  • Lycodapus derjugini Andriashev, 1935
  • Lycodapus dermatinus Gilbert, 1896
  • Lycodapus endemoscotus Peden & M. E. Anderson, 1978
  • Lycodapus fierasfer Gilbert, 1890
  • Lycodapus leptus Peden & M. E. Anderson, 1981
  • Lycodapus mandibularis Gilbert, 1915
  • Lycodapus microchir Schmidt, 1950
  • Lycodapus pachysoma Peden & M. E. Anderson, 1978
  • Lycodapus parviceps Gilbert, 1896
  • Lycodapus poecilus Peden & M. E. Anderson, 1981
  • Lycodapus psarostomatus Peden & M. E. Anderson, 1981

Characteristics

Lycodapus eelpouts have bodies which vary from slender to robust, the depth varying between 3.2% to 10% of the standard length. They may have transparent, gelatinous or opaque skin with no scales present. There are also no oral valve, occipital pores or pelvic fins. The only suborbital bone present is the lacrimal.[7] The gill slit is not joined to the isthmus to its rear. The flesh is gelatinous. In males the front teeth in the jaw are canine like. The pseudobranch, vomerine and palatine teeth are normally present. The pectoral fin has between 5 and 9 rays.[8] These are small eelpouts, some of which are mature at lengths of 120 mm (4.7 in).[7] The largest species is Lycodapus antatcticus which has a maximum published total length of 22.5 cm (8.9 in).[6]

Distribution and habitat

Lycodapus eelpouts are found mainly in the eastern Pacific Ocean with some species extending into the Bering Sea and western North Pacific Oceans and others extending in to the Southern Ocean. They appear to be mesopelagic fishes with most specimens being collected in open nets. There is also some evidence for diel vertical migration which has been described for Lycodapus mandibularis.[8]

References

  1. 1 2 Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Lycodinae". Catalog of Fishes. California Academy of Sciences. Retrieved 7 November 2022.
  2. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Lycodapus". Catalog of Fishes. California Academy of Sciences. Retrieved 7 November 2022.
  3. ↑ Anderson , M. E. and V. V . Fedorov (2004). "Family Zoarcidae Swainson 1839 — eelpouts" (PDF). California Academy of Sciences Annotated Checklists of Fishes. 34.
  4. ↑ M. Eric Anderson; Duane E. Stevenson; Gento Shinohara (2009). "Systematic review of the genus Bothrocara Bean 1890 (Teleostei: Zoarcidae)". Ichthyological Research. 56 (2): 172–194. doi:10.1007/s10228-008-0086-6. S2CID 41632983.
  5. ↑ Christopher Scharpf & Kenneth J. Lazara, eds. (6 May 2022). "Order Perciformes Suborder Cottoidea: Infraorder Zoarcales: Family: Zoarcidae". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 7 November 2022.
  6. 1 2 Froese, Rainer and Pauly, Daniel, eds. (2022). Species of Lycodapus in FishBase. June 2022 version.
  7. 1 2 Anderson, M.E. (1990). "Zoarcidae". In O. Gon and P.C. Heemstra (eds.). Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa. pp. 256–276. ISBN 9780868102115.
  8. 1 2 M. Eric Anderson (1994). "Systematics and Osteology of the Zoarcidae (Teleostei: Perciformes)". Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology. 60.
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