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Plumasteridae (disused)
Taxonomy
Plumasteridae was named by Gale (2011). It is not extant. Its type is Plumaster.
It was assigned to Spinulosida by Gale (2011); and to Spinulosida by Gale and Jagt (2021).
It was assigned to Spinulosida by Gale (2011); and to Spinulosida by Gale and Jagt (2021).
Synonymy list
Year | Name and author |
---|---|
2011 | Plumasteridae Gale p. 82 |
2021 | Plumasteridae Gale and Jagt p. 178 |
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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. †Plumasteridae Gale 2011
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Diagnosis
Reference | Diagnosis | |
---|---|---|
A. S. Gale 2011 | Multiarmed (12–22 arms) asteroids with broad adambulacrals which occupy the entire actinal surface of the arm and V distally: adambulacrals concavoconvex, 5–8 specialised interlocking articulation ridges and grooves articulate with ridges on adjacent adambulacral (modified ada2-3); abactinal ossicles with numerous lateral projections and embayments, and each carries a central large convex boss with which long, glassy, ridged spines articulate. | |
A.S. Gale and J.W.M. Jagt 2021 | Five- to multi-armed asteroids possessing broad, short concavo-convex adambulacrals which possess a single row of large, transverse spine pits; adambulacrals articulate by means of transversely arranged specialised surfaces; abactinal ossicles stellate, large, with a central boss with which a long, glassy spine articulates. |