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Proexenocrinus
Taxonomy
Proexenocrinus was named by Strimple and McGinnis (1972) [Sepkoski's age data: O Aren-l Sepkoski's reference number: 1066]. Its type is Proexenocrinus inyoensis.
It was assigned to Xenocrinidae by Strimple and McGinnis (1972); to Rhodocrinitidae by Ausich (1986) and Ausich (1998); to Diplobathrida by Sepkoski (2002); and to Tanaocrinidae by Webster (2006).
It was assigned to Xenocrinidae by Strimple and McGinnis (1972); to Rhodocrinitidae by Ausich (1986) and Ausich (1998); to Diplobathrida by Sepkoski (2002); and to Tanaocrinidae by Webster (2006).
Species
P. inyoensis (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Proexenocrinus Strimple and McGinnis p. 72 |
| 1986 | Proexenocrinus Ausich p. 217 |
| 1998 | Proexenocrinus Ausich p. 23 |
| 2002 | Proexenocrinus Sepkoski |
| 2006 | Proexenocrinus Webster |
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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. †Proexenocrinus Strimple and McGinnis 1972
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†Proexenocrinus inyoensis Strimple and McGinnis 1972
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. I. Ausich 1986 | Rhodocrinitid with a high bowl- shapedcalyx, infrabasalswith the distal tips visible insideview, basalplatesmostlyoutside the basalconcavity, median ray ridges, the first two rangesof platesin normal interrays with a 1/2 arrangement,CD interrayprobably undifferentiated,10uniserialarms withhigh brachials. |