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Ravniaster granulatus
Taxonomy
Ravniaster granulatus 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 granulatus by Rasmussen (1950) and Rasmussen (1979).
It was recombined as Ceramaster granulatus by Rasmussen (1950) and Rasmussen (1979).
Synonymy list
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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.
†Ravniaster granulatus Rasmussen 1945
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Diagnosis
Reference | Diagnosis | |
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H. W. Rasmussen 1950 | A Ceramaster with equal numbers of superomarginals and inferomarginals. In the outermost part of the arm the marginals of the two sides meet in the mid line, producing an ossicle whose outline seen from the dorsal side is characteristically pentagonal. The free surface of the ossicles is evenly tumid, without an abactinal swelling; it is privided with a depressed border within which spine-pits and a marked granulation are found. |