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Chomataster tethysiensis
Taxonomy
Nymphaster tethysiensis was named by Villier (2001). Its type specimen is Museum of Tercis-les-Bains, Holotype AST IV 104.3, Paratypes AST II 81.4, AST IV and is a 3D body fossil. Its type locality is Sample IV 104.3, Tercis-les-Bains, which is in a Campanian offshore shelf limestone in France.
It was recombined as Chomataster tethysiensis by Jagt et al. (2021).
It was recombined as Chomataster tethysiensis by Jagt et al. (2021).
Synonymy list
| Year | Name and author |
|---|---|
| 2001 | Nymphaster tethysiensis Villier pp. 585-589 figs. fig. 3.1-20 |
| 2001 | Nymphaster tethysiensis Villier and Odin figs. pl. 1, fig. 1-3, 5 |
| 2021 | Chomataster tethysiensis Jagt et al. p. 10 |
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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.
†Chomataster tethysiensis Villier 2001
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. Villier 2001 | Superomarginal plates of the arm bases each with two tubercules for articulation of spines. Tubercles generally occur on the external edge of the plate. To the arm tip, the tubercles are replaced by rounded bulges, and to the disc interradial marginal plates are only covered with granule pits. Center of the external face is slightly domed with granule-pits varying in size from coarser in the center to finer laterally, the plate edges being flattened and smooth. Inferomarginal and superomarginal plates alternate. Lateral faces of the marginal plates are flattened, bordered by a thickened rim. Internal face is oblical and concave. Inferomarginal plates with a regularly convex profile, close to a circle-arc, and with ornament of fine, dense granule-pits. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum | |||||
| References: Aberhan 1992, Blake 1990, Aberhan et al. 2004 | |||||
Age range: Late/Upper Campanian or 83.50000 to 70.60000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | France (Landes) | Nymphaster tethysiensis (213859 213881 213916 214093 214095 type locality: 214098) |