| 词条 | Protanguilla |
| 释义 |
| image = Protanguilla palau.jpg | image_caption = (a) Holotype, female, 176 mm SL. (b–g) Paratype, juvenile, 65 mm SL; (c,d) head in lateral and ventral view; (e) gill opening; (f,g) stained body scales.[1] | display_parents = 3 | grandparent_authority = G.D. Johnson, H. Ida & Miya, 2012 | genus = Protanguilla | parent_authority = G.D. Johnson, H. Ida & Miya, 2012 | species = palau | authority = G. D. Johnson, H. Ida & Sakaue, 2012 }}Protanguilla palau is a species of eel, the only species in the genus Protanguilla (first eel), which is in turn the only genus in its family, Protanguillidae. Individuals were found swimming in March 2010 in a deep underwater cave in a fringing reef off the coast of Palau.[1] CharacteristicsThe body is very small and slender, about 18 cm long.[2][3] The eel has a second premaxilla and under 90 vertebrae, features previously found only in fossilised eels. Its full set of gill rakers in its branchial arches has never previously been found in an eel, but is common in bony fish.[4] It is very different from all other living eels, and scientists estimate it must have diverged from the others around 200 million years ago, during the Mesozoic era. It thus has not only its own species, but also its own genus and family, as well, and has been referred to by scientists as a "living fossil".[3] References1. ^1 {{cite journal |last=Johnson |first=G. D. |author2=Ida H. |author3=Sakaue J. |author4=Sado T. |author5=Asahida T. |author6=Miya M. |year=2012 |title=A 'living fossil' eel (Anguilliformes: Protanguillidae, fam nov) from an undersea cave in Palau |journal=Proceedings of the Royal Society |volume=(in press) |doi=10.1098/rspb.2011.1289 |pmc=3259923 }}{{Open access}} 2. ^[https://www.google.com/hostednews/afp/article/ALeqM5jpgfZ7kYnRBImcgjv-7eY1jtCEVg?docId=CNG.7aa66f1c981d06b848662459607dc717.51 'Fossil eel' squirms into the record books], Agence France-Presse, 16 August 2011. 3. ^1 {{cite news |url=https://www.bbc.co.uk/news/science-environment-14547942 |author=Rincon, Paul |title=New Pacific eel is a 'living fossil', scientists say |publisher=BBC News |accessdate=17 August 2011 |date=17 August 2011}} 4. ^{{cite web |url= http://www.eurekalert.org/pub_releases/2011-08/s-sdt081711.php |title=Scientists discover the most primitive living eel |work=eurekalert.org |year=2011 |accessdate=17 August 2011}} External links{{Commons category|Protanguilla palau}}{{Wikispecies}}
5 : Eels|Fish of the Pacific Ocean|Living fossils|Monotypic fish genera|Fish described in 2012 |
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