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Composita cracens
Taxonomy
Composita cracens was named by Cooper and Grant (1976). Its type specimen is USNM 153008a, a shell (Articulated shell), and it is not a trace fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Composita cracens Cooper and Grant p. 2148 figs. Pl 653, figs 38-52 |
| 1995 | Composita cracens Kues p. 73 fig. 7.11,12 |
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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 cracens Cooper and Grant 1976
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 55 | 4.69 | 1.30 | 18.0 | 4.70 | 3.84 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Collections (24 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian | USA (Texas) | Composita cracens (105801) | |
| Sakmarian | USA (New Mexico) | Composita cracens (39152) | |
| Sakmarian | USA (Texas) | Composita cracens (75962 105756) | |
| Artinskian | USA (Texas) | Composita cracens (81616 105588 105800 105892 105908) | |
| Kungurian | USA (Texas) | Composita cracens (75864 75865 75881 81592 81635 81637 81710 81723 81860 81862 81938 81951 105988) Composita emarginata (81724) | |
| Roadian | USA (Texas) | Composita cracens (102610) |