Narrownose chimaera
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| Narrownose chimaera | |
|---|---|
| |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Holocephali |
| Order: | Chimaeriformes |
| Family: | Rhinochimaeridae |
| Genus: | Harriotta |
| Species: | H. raleighana
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| Binomial name | |
| Harriotta raleighana | |
The narrownose chimaera (Harriotta raleighana) is a longnose chimaera of the family Rhinochimaeridae,[3] the longnose chimaeras, consisting of eight species belonging three genera.[4] This species is found in temperate seas worldwide, at depths between 200 and 3,100 m.[3] Its length is between 1.0 and 1.5 m, including a long, tapering snout and a long, filamentous tail.[5]
Taxonomy
[edit]This species was first described by George Brown Goode and Tarleton Hoffman Bean in 1895.[2] The genus Harriotta refers to Thomas Harriot and the species name references Sir Walter Raleigh.[3][2]
Description
[edit]Narrownose chimaeras have elongate rostra, slender tails, large pectoral and pelvic fins, large eyes, and two dorsal fins, the first being preceded by a mildly toxic spine.[4][2] They possess two pairs of non-replaceable tooth plates in the upper jaw and a one pair in the lower jaw.[6] Male H. raleighana are estimated to reach 62.8 cm (24.7 in) and female 75.8 cm (29.8 in) at maturity, respectively.[7]
Habitat
[edit]The narrownose chimaera is found off Nova Scotia and in much of the rest of the Atlantic Ocean,[8] and in parts of the Pacific Ocean to depths of 3100 metres.[4] Very little is known of their biology due to their deep water habitats.[6]
Reproduction
[edit]Longnose chimaeras are members of the class Chondrichthyes, diverging from their closest relatives (sharks, rays, and skates) approximately 400 million years ago.[9] Like many other Chondrichthyes, longnose chimaeras reproduce by laying eggs.[7] Egg cases consist of a central chamber surrounded by a web-like structure.[6] Female longnose chimaeras lay a pair of eggs several times per season.[9]
Conservation status
[edit]The IUCN has classified this species as being of least concern.[1] In June 2018 the New Zealand Department of Conservation classified the narrownose chimaera as "Not Threatened" under the New Zealand Threat Classification System.[10]
Gallery
[edit]-
Illustration from paper giving the original description -
Harriotta raleighana in the Gulf of Mexico in 2012
Media related to Harriotta raleighana at Wikimedia Commons
References
[edit]- ^ a b Dagit, D.D.; Walls, R.H.L. & Buscher, E. (2016). "Harriotta raleighana". IUCN Red List of Threatened Species. 2016: e.T60140A3088899. doi:10.2305/IUCN.UK.2016-1.RLTS.T60140A3088899.en. Retrieved 20 November 2021.
- ^ a b c d Goode, G. Brown; Bean, Tarleton H. (1895). "Scientific results of explorations by the U. S. Fish Commission steamer Albatross. No. XXX. On Harriotta, a new type of chimaeroid fish from the deeper waters of the northwestern Atlantic" (PDF). Proceedings of the United States National Museum. 17 (1014): 471–473. doi:10.5479/si.00963801.17-1014.471. BHL page 15675494.
- ^ a b c Froese, Rainer; Pauly, Daniel (eds.). "Harriotta raleighana". FishBase.
- ^ a b c "FAMILY Details for Rhinochimaeridae - Longnose chimaeras". www.fishbase.org. Retrieved 2020-07-21.
- ^ Laura Gegel (2016-03-22). "Freaky winged fish with glowing green eyes mystifies fishermen". CBS News. Retrieved 2016-03-23.
- ^ a b c Didier, Dominique A. "Phylogeny and classification of extant Holocephali." Biology of sharks and their relatives 4 (2004): 115–138.
- ^ a b Finucci, B.; Dunn, M. R.; Jones, E. G.; Anderson, J. (2017-02-01). "Reproductive biology of the two deep-sea chimaerids, longnose spookfish (Harriotta raleighana) and Pacific spookfish (Rhinochimaera pacifica)". Deep Sea Research Part I: Oceanographic Research Papers. 120: 76–87. Bibcode:2017DSRI..120...76F. doi:10.1016/j.dsr.2016.11.008. ISSN 0967-0637.
- ^ McMillan, Elizabeth (March 7, 2016). "Creepy deepwater fish surprises Nova Scotia fisherman". CBC News. Retrieved July 21, 2020.
- ^ a b "Chimaera". The Shark Trust. 7 November 2018. Retrieved 2020-07-21.
- ^ Duffy, Clinton A. J.; Francis, Malcolm; Dunn, M. R.; Finucci, Brit; Ford, Richard; Hitchmough, Rod; Rolfe, Jeremy (2018). Conservation status of New Zealand chondrichthyans (chimaeras, sharks and rays), 2016 (PDF). Wellington, New Zealand: Department of Conservation. p. 10. ISBN 9781988514628. OCLC 1042901090.