Pyramus Dana 1847 (clam)

Bivalvia - Pholadomyida - Megadesmidae

Full reference: J. D. Dana. 1847. Descriptions of fossil shells of the collections of the exploring expedition under the command of Charles Wilkes, USN, obtained in Australia, from the lower layers of the coal formation in Illawarra, and from a deposit probably of nearly the same age at Harper's Hill, Valley of the Hunter. American Journal of Science and Arts, Second Series 4:151-160

Parent taxon: Megadesmidae according to N. J. Morris et al. 1991

See also Salvador and Simone 2010 and Sepkoski 2002

Sister taxa: Astartila, Astartilinae, Carnauba, Crassiconcha, Ferrazia, Huabiella, Jacquesia, Megadesminae, Megadesmus, Plesiocyprellinae, Plesiocyprinellinae, Pleurikodonta, Romaniamya, Unklesbayella

Subtaxa: Pyramus aenigmaeformis Pyramus concentricus Pyramus igori Pyramus laevis Pyramus myiformis Pyramus myriformis Pyramus nelliae Pyramus permianus Pyramus planus Pyramus primigenius Pyramus silicius Pyramus simmetricus

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Type: Pyramus myiformis

Ecology: facultatively mobile infaunal suspension feeder


• Permian of Australia (34 collections), China (4), Japan (1), Nepal (3), New Zealand (1), the Russian Federation (11), South Africa (1)

• Namurian of Australia (3)

• Carboniferous to Permian of the Russian Federation (1)

• Carboniferous of Argentina (1), Australia (1)

Total: 61 collections including 70 occurrences

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Specimen images are retrieved through the ePANDDA API.

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