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Showing results for tags 'ambocoelia'.
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Found as surface float on the scree pile at the Windom exposure. A very common fossil in Hamilton group sediments. Similar to Emanuella praeumbona, distinguished from E. praeumbona by the hinge width; the hinge of A. umbonata spans the width of the valve, while that of E. praeumbona is narrower. A. umbonata has a nearly flat brachial valve, while that of E. praeumbona shows a convex profile. Full-sized specimens of A. umbonata are also not as large as E. praeumbona. References: Wilson, K. A. “Field Guide to the Devonian Fossils of New York” (2014). Paleontological Research Institution Special Publication No. 44. Linsley, D. M. “Devonian Paleontology of New York” (1994). Paleontological Research Institution Special Publication No. 21. Hall, J. Palaeontology of New York v. 4. (1867) Fossilworks. http://fossilworks.org
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- a. umbonata
- ambocoelia
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Found as surface float near the top of the Windom exposure, a few feet below the Genundewa Limestone at Penn-Dixie Quarry in Hamburg, NY. A very common fossil in Hamilton Group sediments. Similar to Emanuella praeumbona, distinguished from E. praeumbona by the hinge width; the hinge of A. umbonata spans the width of the valve, while that of E. praeumbona is narrower. A. umbonata has a nearly flat brachial valve, while that of E. praeumbona shows a convex profile. Full-sized specimens of A. umbonata are also not as large as E. praeumbona. Originally designated Orthis umbonata. A. umbonata has been defined as the type species of Ambocoelia by Hall. References: Wilson, K. A. “Field Guide to the Devonian Fossils of New York” (2014). Paleontological Research Institution Special Publication No. 44. Linsley, D. M. “Devonian Paleontology of New York” (1994). Paleontological Research Institution Special Publication No. 21. Hall, J. Palaeontology of New York v. 4. (1867) Fossilworks. http://fossilworks.org
- 1 comment
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- 1
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- a. umbonata
- ambocoelia
- (and 13 more)