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Composita biforma
Taxonomy
Composita biforma was named by Yang (1991). Its type specimen is IV47637 and is a 3D body fossil. Its type locality is Yishan section GY147, which is in an Artinskian carbonate limestone in the Qixia Formation of China.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1991 | Composita biforma Yang p. 87 figs. Pl 1, figs 11, 18 |
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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.
†Composita biforma Yang 1991
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 15.3 | 14.8 | 15.9 | 15.4 | 0.778 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: Artinskian or 290.10000 to 283.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | China (Guangxi) | Composita biforma (type locality: 132982) |