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Comptonia
Taxonomy
Comptonia was named by Gray (1840) [Sepkoski's age data: K Apti K Ceno-u]. It is not extant. Its type is Comptonia elegans.
It was assigned to Goniasteridae by Forbes (1841), Spencer and Wright (1966) and Breton (1992); to Valvatida by Sepkoski (2002); and to Pseudarchasteridae by Gale (2020).
It was assigned to Goniasteridae by Forbes (1841), Spencer and Wright (1966) and Breton (1992); to Valvatida by Sepkoski (2002); and to Pseudarchasteridae by Gale (2020).
Species
C. bretoni, C. bruni, C. elegans (type species), C. soullansensis, C. stelcki, C. thierryi, C. wightensis
Species lacking formal opinion data
Synonymy list
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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. †Comptonia Gray 1840
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†Comptonia bretoni Gale 2020
†Comptonia bruni Breton 1992
†Comptonia elegans Gray 1840
†Comptonia soullansensis Breton 1992
†Comptonia stelcki McLearn 1944
†Comptonia thierryi Breton 1992
†Comptonia wightensis Breton 1992
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Breton 1992 | Long and slender arms. Radius at least 3 time longer than the interradius. Interbrachial arc parabolic. Marginal plates squarish. One row of carinal plates inserted between the superomarginal rows and joining the arm tip. External face of the marginal plates convex, slightly domed to saddle-shaped. Ornament of tiny, dense granule-pits, occasionally associated with tiny and evenly spaced tubercles. Pedicellariae unknown. | |
| A.S. Gale 2020 | Pseudarchasterids in which the interradii are strongly curved, and the interradial marginals are very narrow; the abactinal plates set between the superomarginals in the proximal arm are approximately as broad as the superomarginals. |