Cyema atrum
Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Elopocephalai
Supercohors: Elopocephala
Cohors/Superordo: Elopomorpha
Ordo: Saccopharyngiformes
Familia: Cyematidae
Genus: Cyema
Species: Cyema atrum
Name
Cyema atrum Günther, 1878
References
DeVaney, S.C.; Hartel, K.E.; Themelis, D.E. 2009: The first records of Neocyema (Teleostei: Saccopharyngiformes) in the western North Atlantic with comments on its relationship to Leptocephalus holti Schmidt 1909. Northeastern naturalist, 16(3): 409–414. DOI: 10.1656/045.016.n308
Links
EoL
Bailly, N. (2010). Cyema atrum. In: Nicolas Bailly (2010). FishBase. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=127164 on 2011-01-20
Cyema is a monospecific genus of marine ray-finned fish belonging to the monotypic family Cyematidae. The only species in the genus is Cyema atrum, the arrow eel, bobtail eel, bobtail snipe eel or deepwater eel. This species has circumglobal distribution.
Taxonomy
Cyema was first proposed as a genus in 1878 by the German-born British ichthyologist Albert Günther when he described its only species Cyema atrum.[2] The type locality of C. atrum was given as the South Pacific from Challenger station 295 from a depths of 1,500 fathoms (9,000 ft; 2,700 m) and the Antarctic Ocean from Challenger station 158 from a depth of 1,800 fathoms (10,800 ft; 3,300 m).[4] In 1912 Charles Tate Regan classified this genus in the family Cyematidae, this genus is the only genus classified in that family. Formerly, the genus Neocyema was classified within this family but it is now classified in the family Neocyematidae.[5] This family is classified within the suborder Anguilloidei of the eel order Anguilliformes.[6]
Etymology
Cyema is derived from the Greek word kýēma (Gr. κύημα), which means "that which is conceived", in other words and embryo or foetus, an allusion Günther did not explain but it is likely to be an allusion to this taxon having a soft body like that of a leptocephalus. The specific name atrum is the neuter of ater, a Latin word meaning "black", a reference to the plain black colour of this eel.[7]
Description
Cyema has acompressed body with its anus in the middle, the trunk and the tail are of equal length. It has delicate, elongated jaws that resemble the beak of a bird. It has tiny, closley set teeth with recurved points on the jaws and on the vomer. The front nostrils are tubular while the rear nostrils resemble pores, closely set and jus to the front of the eyes. The small gill openings are just under the base of the pectoral fins. The dorsal and anal fins are large, originating just to the rear of the anus, getting taller to the rear and with their rear ends projecting past the caudal fin as a pair of lobes. The caudal fin consists of a small number of small rays. There are no pelvic fins. It is a uniform dark velvety brown pr purplish-black.[8] This species has a maximum published total length of 15 cm (5.9 in), although 13 cm (5.1 in) is more typical.[9]
Distribution and habitat
Cyema is found in all the oceans. In the Atlantic Ocean, it as far north as the waters off southwestern Greenland and at the southern boundary of the Irminger Sea. In the eastern Atlanticis occurs from off the coast of Portugal and Gibraltar west to the Azores and Madeira, south to South Africa. In the western Atlantic, itv occurs from off eastern Canada south to Bermuda, as well as having been recorded off Brazil and Argentina, although it is absent from the Gulf of Mexico, the Caribbean Sea or the Sargasso Sea. It is also found in the Indian Ocean off Somalia and in the central Indian Ocean extendingg east to Australia and New Zealand. The snipe eel has been recorded off southern Japan and in the Eastern Pacific, from British Columbia and Oregon south to Panama and Chile.[1] It is a Mesopelagic and bathypelagic fish found at depths between 330 and 5,100 m (1,080 and 16,730 ft), typically deeper than 610 m (2,000 ft).[9]
Biology
Cyema is a little known fish but it is carnivorous. It is also oviparous and has a leptocephalus larva.[9]
References
Knudsen, S. (2015). "Cyema atrum". IUCN Red List of Threatened Species. 2015: e.T18227109A60787320. doi:10.2305/IUCN.UK.2015-4.RLTS.T18227109A60787320.en. Retrieved 9 November 2024.
Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Cyematidae". Catalog of Fishes. California Academy of Sciences. Retrieved 9 November 2024.
Van Der Laan, Richard; Eschmeyer, William N.; Fricke, Ronald (11 November 2014). "Family-group names of Recent fishes". Zootaxa. 3882 (1): 1–230. doi:10.11646/zootaxa.3882.1.1. PMID 25543675.
Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Cyema". Catalog of Fishes. California Academy of Sciences. Retrieved 9 November 2024.
Nelson, Joseph S.; Grande, Terry C.; Wilson, Mark V. H. (2016). Fishes of the World (5th ed.). John Wiley & Sons. pp. 151–152. ISBN 9781118342336.
"Eschmeyer's Catalog of Fishes Classification". California Academy of Sciences. Retrieved 9 November 2024.
Christopher Scharpf (30 March 2023). "Family CYEMATIDAE Regan 1912 (Bobtail Eel)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf. Retrieved 9 November 2024.
Dianne J. Bray. "Cyema atrum". Fishes of Australia. Museums Victoria. Retrieved 9 November 2024.
Froese, Rainer; Pauly, Daniel (eds.). "Cyema atrum". FishBase. June 2024 version.
Froese, Rainer; Pauly, Daniel (eds.). "Cyema atrum". FishBase. June 2011 version.
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