Monognathus
Monognathus | |
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M. jesperseni | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Anguilliformes |
Family: | Monognathidae |
Genus: | Monognathus Bertin, 1936 |
Species | |
15, see text. |
Monognathus, or onejaw, is the only genus of the family Monognathidae of deep-sea eels. The name comes from the Greek monos meaning “one” and gnathos meaning “jaw”, a reference to the large mouth in comparison with the rest of the fish, and also the absence of an upper jaw (maxilla and premaxilla bones are absent).[1]
Description
The dorsal and anal fins lack bony supports and the pectoral fins are missing. The snout has a fang connected to glands, which are venomous in adults.[2] These eels are virtually blind, with rudimentary eyes and small olfactory organs, although the male olfactory organs are enlarged, perhaps suggesting a method of "sniffing out" a mate.[1]
Typical lengths are from 4 to 10 cm (1.5–4 in), the maximum length recorded is 15.9 cm (6.3 in).
Distribution
They are found at depths of over 2,000 m (6,600 ft), and are found in all oceans.[3][1]
Species
The fifteen known species are:[3]
- Monognathus ahlstromi Raju, 1974 (Paddletail onejaw)
- Monognathus berteli J. G. Nielsen & Hartel, 1996.
- Monognathus bertini Bertelsen & J. G. Nielsen, 1987.
- Monognathus boehlkei Bertelsen & J. G. Nielsen, 1987.
- Monognathus bruuni Bertin, 1936.
- Monognathus herringi Bertelsen & J. G. Nielsen, 1987.
- Monognathus isaacsi Raju, 1974.
- Monognathus jesperseni Bertin, 1936.
- Monognathus jesse Raju, 1974.
- Monognathus nigeli Bertelsen & J. G. Nielsen, 1987.
- Monognathus ozawai Bertelsen & J. G. Nielsen, 1987.
- Monognathus rajui Bertelsen & J. G. Nielsen, 1987.
- Monognathus rosenblatti Bertelsen & J. G. Nielsen, 1987.
- Monognathus smithi Bertelsen & J. G. Nielsen, 1987.
- Monognathus taningi Bertin, 1936.
References
- ^ a b c BÖHLKE, EUGENIA B.; BÖHLKE, JAMES E.; LEIBY, MARK M.; McCOSKER, JOHN E.; BERTELSEN, E.; ROBINS, CATHERINE H.; ROBINS, C. RICHARD; SMITH, DAVID G.; TIGHE, KENNETH A. (1989). Orders Anguilliformes and Saccopharyngiformes: Part 9, Volume 1. Yale University Press. ISBN 978-1-933789-19-4. JSTOR j.ctvbcd0dm.
- ^ Poulsen, Jan Y.; Miller, Michael J.; Sado, Tetsuya; Hanel, Reinhold; Tsukamoto, Katsumi; Miya, Masaki (2018-07-25). "Resolving deep-sea pelagic saccopharyngiform eel mysteries: Identification of Neocyema and Monognathidae leptocephali and establishment of a new fish family "Neocyematidae" based on larvae, adults and mitogenomic gene orders". PLOS ONE. 13 (7): e0199982. Bibcode:2018PLoSO..1399982P. doi:10.1371/journal.pone.0199982. ISSN 1932-6203. PMC 6059418. PMID 30044814.
- ^ a b Froese, Rainer; Pauly, Daniel (eds.). "Family Monognathidae". FishBase. June 2011 version.
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- Kingdom: Animalia
- Phylum: Chordata
- Subphylum: Vertebrata
- Class: Actinopterygii
- Superorder: Elopomorpha
Protanguilloidei | |
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Synaphobranchoidei |
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Muraenoidei |
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Chlopsoidei |
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Congroidei |
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Moringuoidei |
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Saccopharyngoidei |
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Anguilloidei |
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![European conger eel](http://upload.wikimedia.org/wikipedia/commons/thumb/7/76/Conger_conger_Gervais.jpg/140px-Conger_conger_Gervais.jpg)
As food |
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Related topics |
Category
Commons
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