Bothrocara
| Bothrocara | |
|---|---|
| |
| Bothrocara brunneum | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Perciformes |
| Family: | Zoarcidae |
| Subfamily: | Lycodinae |
| Genus: | Bothrocara T. H. Bean, 1890 |
| Type species | |
| Bothrocara mollis T. H. Bean, 1890[1]
| |
| Species | |
|
about 8, see text | |
| Synonyms[1] | |
Bothrocara is a genus of marine ray-finned fishes belonging to the family Zoarcidae, the eelpouts. They are found in the Pacific Ocean with one species reaching the southwestern Atlantic Ocean.
Taxonomy
[edit]Bothrocara was first proposed as a monospecific genus in 1890 by the American ichthyologist Tarleton Hoffman Bean when he described Bothrocara mollis from Cape St. James, in Haida Gwaii, British Columbia.[1][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 Bothrocarina, Lycodapus and Lycogrammoides, and these four genera form a clade within the subfamily Lycodinae.[4]
Etymology
[edit]Bothrocara is a compound of bothros, which means "pit" or "trench", and kara, meaning head, an allusion to the large pores along jaws and reaching back to the operculum in B. mollis.[5]
Species
[edit]- Bothrocara brunneum (T. H. Bean, 1890)
- Bothrocaropsis elongata Garman, 1899
- Bothrocara hollandi (Jordan & Hubbs, 1925)
- Bothrocara molle T. H. Bean, 1890
- Bothrocara nyx Stevenson & Anderson, 2005
- Bothrocara pusillum (T. H. Bean, 1890)
- Bothrocara soldatovi (Schmidt, 1950)
- Bothrocara tanakae (Jordan & Hubbs, 1925)
- Bothrocara zestum Jordan & Fowler, 1902
A review of the genus in 2011 placed B. elongata, B. nyx and B. pusillum in the genus Bentartia and classifies B. tanakae in the monospecific genus Zestichthys.[7]
Characteristics
[edit]
Bothrocara eelpouts share the loss of an oral valve with the three sister taxa. They also share the absence of a pelvic fin and compared to other Lycodin eelpouts they do not display marked sexual dimorphism.[4] In his original description of the genus Bean stated that it bore a resemblance to the genus Maynea but lacked teeth on the vomer and palate with the small teeth in the jaws being arranged in narrow bands with very few on the lower jaw. There are six branchiostegals and the gill membrane is narrowly attached to the isthmus. There are large pores along the jaws and these extend rearwards onto the operculum. The front part of the body is naked, with no scales. The dorsal fin has its origin over the that of the pectoral fin and is continuous with the anal fin.[8] However, later authors state that these fish do have vomerine and palatine teeth and that most species, other than the type species, are extensively scaled.[9] These fishes range in size from a maximum published standard length of 14.5 cm (5.7 in) in B. pusillum to 64.5 cm (25.4 in) in B. tanakae.[6]
Distributuion and habitat
[edit]Bothrocara eelpouts are mainly found in the northern Pacific Ocean with one species, B. elongatum, being found in the eastern central Pacific Ocean as far south as Chile, and another B. molle extending into the southwestern Atlantic Ocean.[2] They are demersal fish and can be found in shallow and deep water, mainly along continental slopes.[4]
References
[edit]
- ^ a b c Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Lycodinae". Catalog of Fishes. California Academy of Sciences. Retrieved 21 October 2022.
- ^ a b c Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Bothrocara". Catalog of Fishes. California Academy of Sciences. Retrieved 21 October 2022.
- ^ Anderson , M. E. and V. V . Fedorov (2004). "Family Zoarcidae Swainson 1839 — eelpouts" (PDF). California Academy of Sciences Annotated Checklists of Fishes. 34.
- ^ a b c 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.
- ^ 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 25 October 2022.
- ^ a b Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Bothrocara". FishBase. June 2022 version.
- ^ A. V. Balushkin; B. A. Sheiko; V. V. Fedorov (2011). "Catalog of the archival collection of the Zoological Institute, Russian Academy of Sciences: Class osteichthyes (Bony Fishes), order perciformes, family Zoarcidae". Journal of Ichthyology. 51: 950–1034. doi:10.1134/S0032945211100031.
- ^ Bean, T. H. (1890). "Scientific results of explorations by the U. S. Fish Commission steamer Albatross. No. XI. New fishes collected off the coast of Alaska and the adjacent region southward". Proceedings of the United States National Museum. 13 (795): 37–45.
- ^ M. Eric Anderson (1994). "Systematics and Osteology of the Zoarcidae (Teleostei: Perciformes)". Ichthyological Bulletin of the J.L.B. Smith Institute of Ichthyology (60).