Photocorynus
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| Female P. spiniceps | |
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| Scientific classification Edit this classification | |
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| Binomial name | |
| Template:Taxon infoTemplate:Taxon italics Regan, 1925
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Photocorynus is a monospecific genus of marine ray-finned fish belonging to the family Linophrynidae, the leftvents.[2][3] The only species in the genus is Photocorynus spiniceps.
Photocorynus was first proposed as a genus in 1925 by the English ichthyologist Charles Tate Regan when he described its only species, P. spiniceps.[4] The holotype of P. spiniceps was collected by the Danish research vessel Dana[2] from the Gulf of Panama at 7°15'N, 78°54'W, from a depth of around Template:Cvt.[5] The 5th edition of Fishes of the World classifies this taxon in the family Linophrynidae, within the suborder Ceratioidei, the deep sea anglerfishes, of the anglerfish order Lophiiformes.[6]
Photocorynus means "light club", an allusion to the bioluminescent sac at the end of the short, club-like illicium. The specific name, spiniceps, means "spiny head", a reference to the robust spines on the sphenotic bone.[7]
The known mature male individuals are 6.2–7.3 millimetres (0.24–0.29 in), smaller than any other mature fish and vertebrate; the females, however, reach a significantly larger size of up to 50.5 millimetres (2 in).[8][9] Numerous fish species have both sexes reaching maturity below 20 millimetres (0.79 in).[10]
Photocorynus spiniceps has a circumglobal distribution in the Atlantic and Pacific Oceans. In the Atlantic Ocean it has been recorded from both sides between 32°N and 13°S. In the Pacific it has been recorded from Japan, Hawaii and the Gulf of Panama. Specimens have been taken from depths between Template:Cvt.[1]
Like most other deepsea anglerfishes, Photocorynus spiniceps lures its prey into striking range using a bioluminescent sac at the end of an illicium, the highly modified first ray of the dorsal fin, and swallows the prey whole with the help of a distending jaw and a similarly distending stomach. Its prey can sometimes be as big as their own bodies. The male spends its life fused to its much larger female counterpart, therefore effectively turning her into a hermaphrodite. The male has to bite the female in order to spend the rest of its life fused together.[11]
While the female takes care of swimming and eating, the male, with a large proportion of its body consisting of testes, is charged with the task of aiding reproduction.
See also
References
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- ^ a b Template:Cite iucn
- ^ a b Page Module:Citation/CS1/styles.css has no content.Charles Tate Regan (1925). "Dwarfed Males Parasitic on the Females in Oceanic Angler-Fishes (Pediculati Ceratioidea)". Proceedings of the Royal Society B. 97 (684): 386–400. Bibcode:1925RSPSB..97..386T. doi:10.1098/rspb.1925.0006.
- ^ Script error: No such module "Cite taxon".
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- ^ Page Module:Citation/CS1/styles.css has no content.Christopher Scharpf (21 August 2024). "Order LOPHIIFORMES (part 2): Families CAULOPHRYNIDAE, NEOCERATIIDAE, MELANOCETIDAE, HIMANTOLOPHIDAE, DICERATIIDAE, ONEIRODIDAE, THAUMATICHTHYIDAE, CENTROPHRYNIDAE, CERATIIDAE, GIGANTACTINIDAE and LINOPHRYNIDAE". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf. Retrieved 21 June 2024.
- ^ Page Module:Citation/CS1/styles.css has no content.Theodore W. Pietsch (2005). "Dimorphism, parasitism, and sex revisited: modes of reproduction among deep-sea ceratioid anglerfishes (Teleostei: Lophiiformes)". Ichthyological Research. 52 (3): 207–236. Bibcode:2005IchtR..52..207P. doi:10.1007/s10228-005-0286-2. S2CID 24768783.
- ^ Page Module:Citation/CS1/styles.css has no content.Doughton, Sandi (January 31, 2001). "Catch of the day: Researcher stakes claim to tiny-fish title". The Seattle Times. Archived from the original on 18 May 2008. Retrieved 2 February 2006.
- ^ Page Module:Citation/CS1/styles.css has no content.S. H. Weitzman; R. P. Vari (1988). "Miniaturization in South American freshwater fishes; an overview and discussion". Proceedings of the Biological Society of Washington. 101: 444–465.
- ^ Page Module:Citation/CS1/styles.css has no content.Kessler, R. (2006). "Fish Story in Reverse". Natural History. 115 (3): 32.
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External links
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