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Pycinaster crassus
Taxonomy
Pycinaster crassus was named by Spencer (1907). It is not extant. Its type specimen is Holotype BNHM OR 35498, Paratypes BNHM E 2576, E 2628, E 2632a,b.
Synonymy list
| Year | Name and author |
|---|---|
| 1907 | Pycinaster crassus Spencer pp. 96-97 figs. fig. 24; pl. 29, fig. 1-5 |
| 1913 | Pycinaster crassus Spencer p. 125 figs. pl. 15, fig. 4 |
| 1915 | Pycinaster crassus Valette pp. 38-39 figs. fig. 12 |
| 1935 | Pycinaster crassus Mercier p. 12 figs. pl. 1, fig. 4a-b |
| 1936 | Pycinaster crassus Mercier p. 24 |
| 1943 | Pycinaster crassus Brünnich-Nielsen pp. 56-57 figs. pl. 3, fig. 20-21 |
| 1950 | Pycinaster crassus Rasmussen pp. 73-74 figs. pl. 10, fig. 6-7 |
| 1979 | Pycinaster crassus Rasmussen p. 70 |
| 1993 | Pycinaster crassus Lewis p. 64 |
| 1997 | Pycinaster crassus Breton p. 138 |
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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.
†Pycinaster crassus Spencer 1907
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. W. Rasmussen 1950 | Large size of the marginal plates suggests a large body size. Marginal plates of the disc are long, proportionally thin and high. The upper face has a polygonal outline. Its surface is bulged, more or less covered by homogeneous granule-pits. A strong fold underlined the dorsal margin of the lateral faces, which are markedly concave. Adradial and abradial faces oblique. Median face of articulation with the other raw of marginal plates concave. Lower part of the inferomarginal plate keel-like. |
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||