Files and links (1)
SubmittedCC BY-NC-SA V4.0, Open
Journal article
Eusthenopteron jenkinsi sp. nov. (Sarcopterygii, Tristichopteridae) from the Upper Devonian of Nunavut, Canada, and a Review of Eusthenopteron Taxonomy
Breviora, v 562(1)
Jun 2018
Abstract
New material from the Upper Devonian (Frasnian) Fram Formation of Ellesmere Island, Nunavut, Canada, represents a new large-bodied species of Eusthenopteron. The complete and well-preserved nature of the fossil material enables a description of anatomy that is otherwise poorly represented in most Eusthenopteron species; this includes braincase (ethmosphenoid and otic-occipital), scapulocoracoid, and pectoral fin. The new species is distinguished from other Eusthenopteron species by its large body size, pitted rather than tuberculated dermal cranial ornament, a distinct caudolateral margin of the vomer, an unossified basicranium, and a horizontally oriented hyomandibula. A large sample size and decades of detailed study of Eusthenopteron foordi have resulted in an important anatomical understanding of that species, but a lack of autapomorphies has complicated efforts to diagnose the grouping Eusthenopteron. We review the taxonomic history of Eusthenopteron and provide a new diagnosis that relies on a combination of discrete features that are commonly preserved and unaffected by specimen quality.
Metrics
12 Record Views
Details
- Title
- Eusthenopteron jenkinsi sp. nov. (Sarcopterygii, Tristichopteridae) from the Upper Devonian of Nunavut, Canada, and a Review of Eusthenopteron Taxonomy
- Creators
- Jason P DownsEdward B DaeschlerAlison M LongNeil H Shubin
- Publication Details
- Breviora, v 562(1)
- Publisher
- The Museum of Comparative Zoology
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES); Academy of Natural Sciences of Drexel University
- Other Identifier
- 991020836470304721