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Paerticrinidae
Taxonomy
Paerticrinidae was named by Wright and Toom (2017) [urn:lsid:zoobank.org:act:0EBB8833-D4B9-4D7E-AED0-48FDE7E55B81].
It was assigned to Taxocrinida by Wright and Toom (2017).
It was assigned to Taxocrinida by Wright and Toom (2017).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Paerticrinidae 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.
Fm. †Paerticrinidae Wright and Toom 2017
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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. |