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Paucicrura

Rhynchonellata - Orthida - Dalmanellidae

Synonyms
Synonymy list
YearName and author
1956Paucicrura Cooper pp. 956 - 957
1956Cristiferina Cooper pp. 961 - 962
1975Paucicrura Hints
1977Paucicrura Mitchell
1988Paucicrura Howe p. 206
2000Paucicrura Williams et al. p. 785
2002Cristiferina Sepkoski, Jr.
2002Paucicrura Sepkoski, Jr.
2002Sigopallus Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderDalmanellidinaMoore 1952
superfamilyDalmanelloideaSchuchert 1913
familyDalmanellidaeSchuchert 1913
subfamilyDalmanellinaeSchuchert 1913
genusPaucicrura

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 1956 (Cristiferina)Shell small, less than t inch in width, subelliptical to subcircular in outline; valves unequally convex, the brachial valve having less depth than the pedicle valve; anterior commissure gently sulcate; surface multicostellate, narrowly rounded, and strongly elevated, costellae increasing in number by intercalation. Pedicle valve with stout teeth having large fossettes; dental plates short and stout; delthyrial cavity deep; muscle area heart shaped; diductor scars protruding anterior to the ends of the dental plates and forming 2 lobes at the front of the muscle field. Traces of somewhat divergent vascula media separated by a low median ridge appear in some specimens. Brachial interior with moderately long bladelike brachiophores having short, sharp crura protruding from their inner end; brachiophores supported by strong swelling of the notothyrial platform; sockets deep; no fulcral plates; cardinal process with short, grooved shaft, expanded myophore; surface of myophore with large, recurved median plate; median ridge strongly elevated. Adductor field small.