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Chomataster
Taxonomy
Chomataster was named by Spencer (1913) [Sepkoski's age data: K Sant T Dani Sepkoski's reference number: 772]. It is not extant. Its type is Chomataster acules.
It was assigned to Valvatida by Sepkoski (2002); and to Goniasteridae by Spencer (1913), Spencer and Wright (1966) and Jagt et al. (2021).
It was assigned to Valvatida by Sepkoski (2002); and to Goniasteridae by Spencer (1913), Spencer and Wright (1966) and Jagt et al. (2021).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1913 | Chomataster Spencer |
| 1966 | Chomataster Spencer and Wright p. U59 |
| 2002 | Chomataster Sepkoski |
| 2021 | Chomataster Jagt et al. p. 6 |
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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. †Chomataster Spencer 1913
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†Chomataster acules Spencer 1913
†Chomataster breizh Jagt et al. 2021
†Chomataster tethysiensis Villier 2001
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J.W.M. Jagt et al. 2021 | Medium- to large-sized (R up to 115 mm; r up to 45 mm) goniasterid with tall marginal ossicles; median/interradial superomarginals tall, narrow, lateral face either vertical, inclined outwards or evenly rounded to aboral surface; either with single large crater-shaped spine pit at the summit of the lateral face of all SMs, or only on those of disc/arm transition and along arms; in one species, two spine pits on distal SMs; spherical spines on SMs; no enlarged, ‘angle’ SMs at arm base; SMs in arms alternating, not opposing at mid-radial line; IMs with broad, rounded oral surface, intermarginal facet narrow, either merely with close-set granule cover or 1‒5 large crater-shaped pits on oral face. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum | |||||
| References: Aberhan 1992, Aberhan et al. 2004, Blake 1990 | |||||
Age range: base of the Late/Upper Campanian to the top of the Danian or 83.50000 to 61.60000 Ma
Collections (24 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | Belgium (Liege) | C. acules (32147 32150) | |
| Late/Upper Campanian | France (Landes) | Nymphaster tethysiensis (213859 213881 213916 214093 214095 214098) | |
| Early/Lower Maastrichtian | Belgium (Liege) | C. acules (32148 32151 32158) | |
| Early/Lower Maastrichtian | Germany (Mecklenburg-Vorpommern) | C. acules (32022) | |
| Late/Upper Maastrichtian | Netherlands (Limburg) | C. acules (32159) | |
| Late/Upper Maastrichtian | Netherlands | C. acules (32161 32177 32179) | |
| Late/Upper Maastrichtian | Belgium (Liege) | C. acules (32149 32153 32154 32156 32157) | |
| Late/Upper Maastrichtian - Maastrichtian | Netherlands | C. acules (32162) | |
| Late/Upper Maastrichtian - Danian | Poland | C. acules (64008) | |
| Danian | Denmark | C. acules (89866) |