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Acrothele concava
Taxonomy
Acrothele concava was named by Cooper et al. (1952). Its type specimen is U.S.N.M. No.116035d, a valve, and it is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1952 | Acrothele concava Cooper et al. pp. 44-45 figs. 1-6 |
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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.
†Acrothele concava Cooper et al. 1952
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. A. Cooper et al. 1952 | This species is most strongly suggestive of A. colleni Walcott in its strongly concave brachial umbo and strongly pyramidal pedical valve. It differs from the Montana species, however, in having the umbral concavity covering a somewhat larger area of the posterior and in having a greater convexity of the median area. The pseudointerarea of the pedicle valve of the Mexican species is broader than that of A. colleni, the apex of the latter is narrower than that of A. concava. The anterior slope is more concave in the Montana species than in A. concava. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order, c = class, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Hendy 2009, Aberhan et al. 2004 | |||||
Age range: Wuliuan or 509.00000 to 504.50000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Delamaran - Menevian | Mexico | Acrothele concava (10687) | |
| Wuliuan | Mexico (Sonora) | Acrothele concava (234898) |