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Amphoracrinus
Taxonomy
Amphoracrinus was named by Austin (1848) [Sepkoski's age data: ]. It is not extant.
It was assigned to Amphoracrinidae by Webster and Lane (1987); and to Monobathrida by Sepkoski (2002).
It was assigned to Amphoracrinidae by Webster and Lane (1987); and to Monobathrida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1848 | Amphoracrinus Austin |
| 1987 | Amphoracrinus Webster and Lane p. 8 |
| 2002 | Amphoracrinus Sepkoski |
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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. †Amphoracrinus Austin 1848
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†Amphoracrinus cheni Webster et al. 2009
†Amphoracrinus rupinus Webster and Lane 1987
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. D. Webster and N. G. Lane 1987 | Calyx low to high, rounded or conical, IIRrr, fixed in each half-ray; primanal typically followed by 2 or rarely 3 plates. Tegmen usually higher than theca, but equal to or less than this, tapering upward and prominently lobed but not spinose, summit generally flat, occupied by 5 00, 4 of these forming semicircle around larger posterior 0; anal tube eccentric, on posterior side of CD 0. |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum | |||||
| References: Kiessling 2004, Aberhan et al. 2004, Aberhan 1992 | |||||
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Osagean | USA (Indiana) | A. sp. (2455) | |
| Osagean | USA (New Mexico) | A. rupinus (235910 235911 235912) | |
| Arundian - Holkerian | Ireland | A. gilbertsoni (76517) | |
| Chadian | United Kingdom | A. gilbertsoni, A. atlas, A. bollandensis, A. turgidus, A. compressus (90820) | |
| Chadian | USA (Kentucky) | A. sp. (5868) | |
| Chadian | USA (Indiana) | A. sp. (2251 2252 2442 2448) | |
| Chadian - Arundian | USA (Indiana) | A. sp. (558) |