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Pentasteria (Archastropecten) lithographica
Taxonomy
Plutonaster lithographicus was named by de Loriol (1895). Its type specimen is Holotype ML 20 015 381, Museum d'Histoire Naturelle, Lyon and is a 3D body fossil.
It was recombined as Archastropecten lithographica by Hess (1955); it was recombined as Pentasteria (Archastropecten) lithographica by Breton et al. (1994).
It was recombined as Archastropecten lithographica by Hess (1955); it was recombined as Pentasteria (Archastropecten) lithographica by Breton et al. (1994).
Synonymy list
| Year | Name and author |
|---|---|
| 1895 | Plutonaster lithographicus de Loriol p. 5 figs. pl. 1 fig. 3 |
| 1955 | Archastropecten lithographica Hess pp. 34-35 |
| 1994 | Pentasteria (Archastropecten) lithographica Breton et al. pp. 56-57 figs. text-fig. 4, pl. 1 fig. 5-6 |
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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.
†Pentasteria (Archastropecten) lithographica de Loriol 1895
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Breton et al. 1994 | R/r ratio equals to 3.5. Arms acute, with straight sides. Interbrachial sinus deep but rounded. Thirty-five pairs of marginal plates per half-arc. Marginals twice large as long in the interbrachial arc, squared near the arm tip, where marginals are tall and highly domed. One short columnar spine in the actinal side and one or two abradial spines on every inferomarginal plate. |