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Spiriferella gravis
Taxonomy
Spiriferella gravis was named by Cooper and Grant (1976). Its type specimen is USNM 152953r, a shell (Articulated shell), and it is not a trace fossil. Its type locality is USNM706b, Hess Canyon, Glass Mtns., which is in a Wordian offshore shelf packstone/wackestone in the Word Formation of Texas.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Spiriferella gravis Cooper and Grant p. 2230 figs. Pl 630, figs 1-40 |
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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.
†Spiriferella gravis Cooper and Grant 1976
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 19 | 8.65 | 2.40 | 18.6 | 11.3 | 5.42 |
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| Source: f = family, o = order | |||||
| References: Aberhan et al. 2004, Hendy 2009 | |||||