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Pegmatreta arellanoi
Taxonomy
Pegmatreta arellanoi was named by Cooper et al. (1952). Its type specimen is U.S.N.M. No.116058f, a valve, and it is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1952 | Pegmatreta arellanoi Cooper et al. pp. 43-44 figs. 7-12 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Pegmatreta arellanoi Cooper et al. 1952
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. A. Cooper et al. 1952 | This species is characterized by its short pseudointerarea, strongly oblique conical form and strong biconvexity. It differs from P. rotunda Bell in its apsacline and shorter pseudointerarea, longitudinally oval outline and strongly convex brachial valve Pegmatreta perplexa Bell is also a transversely elliptical form and therefore differs markedly from P. arellanoi. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, uc = unranked clade | |||||
| References: Hendy et al. 2009, Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Collections
No collection or age range data are available