Journal article
Holoptychius bergmanni sp. nov. (Sarcopterygii, Porolepiformes) from the Upper Devonian of Nunavut, Canada, and a Review of Holoptychius Taxonomy
Proceedings of the Academy of Natural Sciences of Philadelphia, v 162(1), pp 47-59
Mar 2013
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Abstract
New material from the Upper Devonian (Frasnian) Fram Formation of Ellesmere Island, Nunavut, Canada, represents the second holoptychiid (Porolepiformes) species to be described from the formation. The quality of preservation and preparation of the material enables description of underrepresented anatomy for Holoptychius including the braincase (ethmosphenoid and otico-occipital). The new species of Holoptychius is diagnosed by, a quadrate articulation positioned on the lingual surface of the lower jaw, the presence of a marginal tooth field on all three coronoids, and the presence of a third mandibular sensory canal located dorsal to the infradentary foramina. Traditional use of the name Holoptychius has resulted in an overabundance of species. In recent years, efforts have been made to re-diagnose Holoptychius according to discrete cranial features rather than more widely distributed aspects of scale morphology. The new species is diagnosed as Holoptychius without any scales attributed to it With this new description, the recent Nunavut Paleontological Expeditions continue to expand the Fram Formation's diverse vertebrate fauna, one that additionally includes the elpistostegalian Tiktaalik roseae.
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Details
- Title
- Holoptychius bergmanni sp. nov. (Sarcopterygii, Porolepiformes) from the Upper Devonian of Nunavut, Canada, and a Review of Holoptychius Taxonomy
- Creators
- Jason P Downs - Swarthmore CollegeEdward B Daeschler - Drexel UniversityFarish A Jenkins - Harvard University, Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, 26 Oxford Street, Cambridge, Massachusetts 02138, USA.Neil H Shubin - Field Museum of Natural History
- Publication Details
- Proceedings of the Academy of Natural Sciences of Philadelphia, v 162(1), pp 47-59
- Publisher
- Academy of Natural Sciences of Philadelphia
- Number of pages
- 14
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES); Academy of Natural Sciences of Drexel University
- Web of Science ID
- WOS:000319024600004
- Scopus ID
- 2-s2.0-84877327587
- Other Identifier
- 991019168424804721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Biodiversity Conservation
- Ecology