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Dzieduszyckia
Taxonomy
Dzieduszyckia is a genus. It is not extant. It is the type genus of Dzieduszyckiinae.
It was assigned to Spiriferida by Sepkoski (2002); and to Dzieduszyckiinae by Williams et al. (2002).
It was assigned to Spiriferida by Sepkoski (2002); and to Dzieduszyckiinae by Williams et al. (2002).
Synonyms
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Synonymy list
Year | Name and author |
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1968 | Eoperegrinella Ager p. 61–63 figs. Pl. 1, figs. 6a, c |
2002 | Dzieduszyckia Sepkoski |
2002 | Dzieduszyckia Williams et al. p. 1241 |
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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.
Diagnosis
Reference | Diagnosis | |
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D. Ager 1968 (Eoperegrinella) | Medium to large rhyncho-nelloids, laterally oval in outline, long straight hinge-line, equally biconvex, both valves with a pronounced median sinus, rectimarginate. Many strong simple costae throughout growth. Beak prominent, sub-mesothyrid. No dental plates, small teeth arising directly from shell wall. Long, massive dorsal median septum supporting thin, horizontal hinge-plates. Crura arising from distal ends of hinge-plates, directly in contact with median septum. The only noteworthy distinctions from Peregrinella are the complete absence of dental plates in some species (though per-haps not all) and the presence of a median sinus in the dorsal valve. |