| 词条 | Edenopteron |
| 释义 |
| name = Edenopteron | fossil_range =Late Devonian -{{fossil range|Famennian}} | image = Edenopteron keithcrooki.tif | image_caption = Reconstruction of Edenopteron keithcrooki | regnum = Animalia | phylum = Chordata | subphylum = Vertebrata | classis = Osteichthyes | subclassis = Sarcopterygii | ordo = Osteolepiformes | familia = Tristichopteridae | genus = Edenopteron | genus_authority = Young, Dunstone, Senden & Young, 2013 | species = E. keithcrooki | binomial = Edenopteron keithcrooki }} Edenopteron is a genus of large tristichopterid fish from the Late Devonian (Famennian) of what is now southeastern Australia. It is known from a single specimen of a single species, E. keithcrooki, described in 2013. DiscoveryEdenopteron keithcrooki is known from remains excavated from the Worange Point Formation, near the town of Eden on the coast of New South Wales in 2008. The species name is a combination of the name Eden and pteron, meaning wing or fin in Greek. The specific name honors Dr. Keith Crook of the Australian National University for his discovery of several fossil sites in New South Wales.[1]Description{{Details|Fish anatomy}}The holotype consists of numerous semi-articulated remains, including an incomplete skull roof, snout, palate, cheeks, lower jaws and associated dermal bones, a left shoulder girdle, and assorted scales. Reconstructions suggest a skull length of 30 cm (12 in) and lower jaw length of about 48 cm (19 in). The endoskeleton shows a large or complete lack of ossification. The orbits (eye-sockets) are somewhat triangular rather than oval-shaped. Edenopteron possessed dentary fangs and premaxillary tusks, which are presumed to be derived traits for other large tristichopterids. By comparison to body size ratios of other tristichopterid fishes (e.g. Eusthenodon, Langlieria, Mandageria), the body length of Edenopteron is estimated at 2.9—3.2 m (9.5—10.5 ft).[1] Additional fossil material may be described in the future: according to lead researcher Gavin Young, quoted in the Canberra Times: "We know that part of the pectoral girdle is still in the rock, so if we can lift up a few more blocks, we might find that the body is actually preserved in the rock."[2] ClassificationEdenopteron is assigned to the Gondwanan tristichopterid subfamily Mandageriinae due to similarities shared with Cabonnichthys and Mandageria, including paired vomers in the palate, submandibular bones overlapping ventral jaw margin, and scales ornamented with widely-spaced grooves.[1]References1. ^1 2 {{cite journal|last=Young|first=Ben|author2=Dunstone, Robert L. |author3=Senden, Timothy J. |author4= Young, Gavin C. |title=A Gigantic Sarcopterygian (Tetrapodomorph Lobe-Finned Fish) from the Upper Devonian of Gondwana (Eden, New South Wales, Australia)|journal=PLoS ONE|year=2013|volume=8|issue=3|pages=e53871|doi=10.1371/journal.pone.0053871|url=http://www.plosone.org/article/info:doi/10.1371/journal.pone.0053871 |pmid=23483884 |pmc=3590215}} 2. ^{{cite news|last=Page|first=Fleta|title=Origin of the species might need rethink|url=http://www.canberratimes.com.au/act-news/origin-of-the-species-might-need-rethink-20130307-2fonr.html|accessdate=8 February 2014|newspaper=The Canberra Times|date=March 8, 2013}} External links{{Portal|Paleontology|Fish}}
7 : Osteolepiformes|Prehistoric lobe-finned fish genera|Late Devonian animals|Late Devonian fish|Prehistoric fish of Australia|Paleontology in New South Wales|Fossil taxa described in 2013 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。