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Megadiscosorus
Taxonomy
Megadiscosorus was named by Foerste (1925) [Sepkoski's age data: O Ashg S Wenl Sepkoski's reference number: 298]. Its type is Megadiscosorus crassisegmentatus.
It was assigned to Cephalopoda by Foerste (1925); to Armenoceratidae by Teichert et al. (1964) and Crick (1981); and to Actinocerida by Sepkoski (2002).
It was assigned to Cephalopoda by Foerste (1925); to Armenoceratidae by Teichert et al. (1964) and Crick (1981); and to Actinocerida by Sepkoski (2002).
Species
M. crassisegmentatus (type species), M. inopinatus
Synonymy list
| Year | Name and author |
|---|---|
| 1925 | Megadiscosorus Foerste p. 90 |
| 1964 | Megadiscosorus Teichert et al. p. 208 |
| 1981 | Megadiscosorus Crick p. 227 |
| 2002 | Megadisocosorus Sepkoski |
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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.
G. †Megadiscosorus Foerste 1925
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†Megadiscosorus crassisegmentatus Foerste 1925
†Megadiscosorus crassisegmentatus brevior Foerste 1925
†Megadiscosorus inopinatus Foerste 1925
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. F. Foerste 1925 | Breviconic cyrtoceracones, with thick siphuncles which are in contact with the ventral wall of the conch, in some species more or less flattened by contact with the latter. Compared with typical Discosorus, the segments of the siphuncle are much taller, and the sutures between the segments are of less depth. |