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Spiriferina subtrigonalis
Taxonomy
Spirifer subtrigonalis was named by Gemmellaro (1899). It is a 3D body fossil. Its type locality is Rocca di San Benedetto, calcare compatto, Sosio, which is in a Wordian carbonate limestone in Italy.
It was recombined as Spiriferina subtrigonalis by de Gregorio (1930).
It was recombined as Spiriferina subtrigonalis by de Gregorio (1930).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1899 | Spirifer subtrigonalis Gemmellaro p. 162 figs. Pl 36, figs 13-17 |
| 1930 | Spiriferina subtrigonalis de Gregorio p. 20 |
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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.
†Spiriferina subtrigonalis Gemmellaro 1899
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 11.5 | 11.0 | 12.0 | 11.5 | 0.707 |
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||