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Pachycephalocrinidae
Taxonomy
Pachycephalocrinidae was named by Cole and Toom (2019).
It was assigned to Glyptocrinoidea by Cole and Toom (2019).
It was assigned to Glyptocrinoidea by Cole and Toom (2019).
Subtaxa
Synonymy list
Year | Name and author |
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2019 | Pachycephalocrinidae Cole and Toom pp. 602 - 603 |
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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. †Pachycephalocrinidae Cole and Toom 2019
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Diagnosis
Reference | Diagnosis | |
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S. R. Cole and U. Toom 2019 | Glyptocrinoid with globose calyx; lobate arm bases; fixed brachials bifurcating once or twice within calyx, often asymmetrically within rays; fixed pinnules up to six or more per ray; relatively few (<10) interradial plates; interray plating 1-2, forming a biseries proximally; fixed intrabrachials present within half rays, occasionally within quarter rays; tegmen high, domed; posterior inter- ray with large periproct opening through calyx side. |
Measurements
No measurements are available
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Source: o = order, c = class, p = phylum | |||||
References: Aberhan et al. 2004, Aberhan 1992, Kiessling 2004 |
Collections
No collection or age range data are available