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Craspedelia

Strophomenata - Strophomenida - Bimuriidae

Taxonomy
Craspedelia was named by Cooper (1956) [Sepkoski's age data: O Llde O Cara-u Sepkoski's reference number: 878].

It was assigned to Bimuriidae by Cooper (1956) and Williams et al. (2000); and to Strophomenida by Sepkoski (2002).

Synonymy list
YearName and author
1956Craspedelia Cooper pp. 772 - 773
2000Craspedelia Williams et al. p. 317
2002Craspedelia Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
RankNameAuthor
phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyPlectambonitoideaJones 1928
familyBimuriidaeCooper 1956
genusCraspedelia

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
ReferenceDiagnosis
G. A. Cooper 1956Shell small, resembling small Bimuria; strongly concavo-convex; transverse and with the hinge equal to or greater than the widest part; surface smooth; pseudopunctate.

Pedicle valve with swollen umbo and median region; foramen produced into a short siphon ; interarea short, anacline ; teeth short and wide ; dental plates absent; other details of the interior not discernible. Anterior margin deflected toward the pedicle valve to form an elevated rim that fits inside a similar rim on the brachial valve.

Brachial valve with anterior margin deflected in the direction of the pedicle valve to form a high rim which fits outside the edge of the pedicle valve ; interarea hypercline ; chilidial plates small. Brachial process small, widely divergent and adhering closely to the palintrope edge. Median septum rising to a crest a short distance anterior to the cardinaha, extended anteriorly as a low ridge or dying out; lateral septa narrowly divergent anteriorly, an elevated and anteriorly fimbriate adductor platform appearing on the outside of the septa.