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Promathilda spirocostata
Taxonomy
Promathilda spirocostata was named by Batten and Stokes (1986). Its type specimen is AMNH 43016 and is a 3D body fossil. Its type locality is AMNH3026, Windowblind Butte, San Rafael Swell, which is in a Smithian lagoonal/restricted shallow subtidal packstone in the Moenkopi Formation of Utah.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1986 | Promathilda spirocostata Batten and Stokes p. 27 figs. 46-48 |
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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.
†Promathilda spirocostata Batten and Stokes 1986
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 2.35 | 2.20 | 2.50 | 2.35 | 0.212 | |
| shell diameter | 2 | 1.24 | 1.10 | 1.40 | 1.25 | 0.212 |
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||