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Metopaster dividuus
Taxonomy
Metopaster dividuus was named by Rasmussen (1945). It is not extant. Its type specimen is Paleontological Department of the Mineralogical and Geological Museum at Copenha.
It was recombined as Ceramaster dividuus by Rasmussen (1950), Spencer and Wright (1966) and Rasmussen (1979).
It was recombined as Ceramaster dividuus by Rasmussen (1950), Spencer and Wright (1966) and Rasmussen (1979).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1945 | Metopaster dividuus Rasmussen pp. 419-420 figs. pl. 9, fig. 3-6 |
| 1950 | Ceramaster dividuus Rasmussen pp. 53-54 figs. pl. 5, fig. 17 |
| 1966 | Ceramaster dividuus Spencer and Wright p. U57 figs. fig. 53.1 |
| 1979 | Ceramaster dividuus Rasmussen p. 70 |
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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.
†Metopaster dividuus Rasmussen 1945
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. W. Rasmussen 1950 | A Ceramaster with a pentagonal outline, and nearly straight sides. The margin is formed of just as many superomarginals as inferomarginals. The marginals are provided with a depressed border bearing line, closely placed setae, and within this, scattered setae attached in spine-pits. In the outermost part of the arm, the superomarginals meet in the mid line. This produces an ossicle which seen from the abactinal side has a characteristic pentagonal outline. |