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Cheirocystis ardmorensis
Taxonomy
Cheirocrinus ardmorensis was named by Bassler (1943). Its type specimen is USNM 93471 and is a 3D body fossil. Its type locality is Hickory Creek Gap, which is in a Chazyan deep subtidal sandstone/shale in the Bromide Formation of Oklahoma.
It was recombined as Cheirocystis ardmorensis by Paul (1972).
It was recombined as Cheirocystis ardmorensis by Paul (1972).
Synonymy list
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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.
†Cheirocystis ardmorensis Bassler 1943
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. R. C. Paul 1972 | A species of Cheirocystis with plate ornament of axial ridges and fine growth lines, proximal stem flanges ornamented with vertical ridges separated
by fine pits; slit-spacing of pectinirhombs averages one slit per 0.2145 mm. |
Measurements
No measurements are available
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| Source: o = order, p = phylum | |||||
| References: Aberhan et al. 2004, Aberhan 1992 | |||||
Age range: base of the Chazyan to the top of the Blackriveran or 470.00000 to 449.60000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chazyan | USA (Oklahoma) | Cheirocrinus ardmorensis (type locality: 230592) | |
| Blackriveran | USA (Oklahoma) | Cheirocystis ardmorensis (23990) |