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Cheirocystella
Taxonomy
Cheirocystella was named by Paul (1972) [Sepkoski's age data: O Trem-u O Aren-l Sepkoski's reference number: 326].
It was assigned to Rhombifera by Sepkoski (2002); and to Cheirocrinidae by Paul (1972), Paul and Rozhnov (2016).
It was assigned to Rhombifera by Sepkoski (2002); and to Cheirocrinidae by Paul (1972), Paul and Rozhnov (2016).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Cheirocystella Paul pp. 31 - 32 |
| 2002 | Cheirocystella Sepkoski |
| 2016 | Cheirocystella 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. †Cheirocystella Paul 1972
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†Cheirocystella antiqua Paul 1972
†Cheirocystella languedociunus Thoral 1935
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. R. C. Paul 1972 | A genus of Cheirocrinidae with open lateral and infralateral circlets and six radials; with short ambulacra confined to flat oral surface; with disjunct pectinirhombs. |
Measurements
No measurements are available
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| Source: o = order, p = phylum | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Stairsian | USA (Utah) | C. antiqua (195523) | |
| Floian | France (Languedoc-Roussillon) | Cheirocrinus languedocianus (101714) | |
| Middle Ordovician | Thailand | C. sp. (191371) | |
| Cautleyan | Greenland (Washington Land) | C. sp. (24162) |