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Paerticrinus
Taxonomy
Paerticrinus was named by Wright and Toom (2017) [urn:lsid:zoobank.org:act:6C1FE002-03BD-47BD-9D2F-8C09495D1540]. Its type is Paerticrinus arvosus.
It was assigned to Paerticrinidae by Wright and Toom (2017).
It was assigned to Paerticrinidae by Wright and Toom (2017).
Species
P. arvosus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Paerticrinus Wright and Toom |
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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. †Paerticrinus Wright and Toom 2017
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†Paerticrinus arvosus Wright and Toom 2017
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. F. Wright and U. Toom 2017 | A small ‘taxocrinid’-grade crinoid with an elongate, conical crown; medium bowl shaped calyx. Rays form ridges in plan view, forming a pentastellate outline. Radianal plate below the C ray radial. Anal X large; above and to the left of radianal; supporting additional vertically stacked plates, culminating in a sac rising above the calyx. Non-posterior interrays comprising large, proximal interradial plate, supporting numerous smaller plates above. Proximal interradial plates positioned between primibrachials laterally, in sutural contact with radials below. Arms branch at least twice, branching isotomously in all divisions. Lower primibrachials fixed, arms becoming free at primibrachial two or three. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, c = class, p = phylum | |||||
| References: Hendy et al. 2009, Aberhan et al. 2004, Kiessling 2004, Aberhan 1992 | |||||