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Cheirocystis
Taxonomy
Cheirocystis was named by Paul (1972) [Sepkoski's age data: O Aren-u O Cara-l Sepkoski's reference number: 326]. Its type is Echinoencrinites anatiformis.
It was assigned to Rhombifera by Sepkoski (2002); and to Cheirocrinidae by Paul (1972), Sumrall and Schumacher (2002) and Paul and Rozhnov (2016).
It was assigned to Rhombifera by Sepkoski (2002); and to Cheirocrinidae by Paul (1972), Sumrall and Schumacher (2002) and Paul and Rozhnov (2016).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Cheirocystis Paul p. 36 |
| 2002 | Cheirocystis Sepkoski |
| 2002 | Cheirocystis Sumrall and Schumacher p. 848 |
| 2016 | Cheirocystis Paul and Rozhnov p. 270 |
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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.
G. †Cheirocystis Paul 1972
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†Cheirocystis anatiformis Hall 1847
†Cheirocystis ardmorensis Bassler 1943
†Cheirocystis fultonensis Sumrall and Schumacher 2002
†Cheirocystis radiatus Jaekel 1899
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. R. C. Paul 1972 | A genus of Cheirocrinidae with all plate circlets closed, six radial plates; short ambulacra confined to flat oral surface; 8-16 disjunct pectinirhombs. |
Measurements
No measurements are available
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| Source: o = order, p = phylum | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chazyan | USA (Oklahoma) | Cheirocrinus ardmorensis (230592) | |
| Kunda | Russian Federation | Chirocrinus radiatus (174007) | |
| Mohawkian | USA (New York) | Cheirocrinus anatiformis (104604 104607 104619) | |
| Blackriveran | USA (Oklahoma) | C. ardmorensis (23990) | |
| Chatfieldian | USA (New York) | Cheirocrinus anatiformis (432) | |
| Edenian | USA (Kentucky) | C. fultonensis (154339) C. sp. (74876) |