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Sowerbyella curdsvillensis

Strophomenata - Strophomenida - Sowerbyellidae

Taxonomy
Plectambonites curdsvillensis was named by Foerste (1912).

It was recombined as Sowerbyella curdsvillensis by Cooper (1956), Howe (1979) and Titus (1992).

Synonyms
Synonymy list
YearName and author
1912Plectambonites curdsvillensis Foerste p. 122 figs. pl. 10 f. 15A, B
1917Plectambonites punctostriatus Mather p. 38 figs. pl. 1, figs. 15-17.
1956Sowerbyella curdsvillensis Cooper pp. 780 - 781 figs. pl. 201A f. 1-13
1956Sowerbyella punctostriata Cooper p. 780 figs. pl. 201A, figs. 1-13
1972Sowerbyella punctostriata Howe p. 442 figs. pl. 1, fig. 12
1979Sowerbyella curdsvillensis Howe pp. C1-C2 figs. Plate 1, figures 6-16
1992Sowerbyella curdsvillensis Titus pp. 769 - 770 figs. 4, 6

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyPlectambonitoideaJones 1928
familySowerbyellidaeOpik 1930
subfamilySowerbyellinaeOpik 1930
genusSowerbyellaJones 1928
speciescurdsvillensis()

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
H. J. Howe 1979Shell large for the genus; width nearly twice the length; cardinal extremities acute to right-angular; anterior margin broadly rounded. Ornamentation unevenly costellate and faintly beaded; one to five finer costellae grouped between slightly larger ones. Region adjacent to posterior margin displaying weak oblique wrinkles in occasional specimens.

Pedicle valve moderat.ely convex in lateral profile; umbonal region gently inflated. Interior of pedicle valve finely papillose. Teeth small. Adjustordiductor muscle field wide, extending to about midlength; diductors strongly diverging in front of short median septum; paired adductor scars deeply incised into callus deposits of delthyrial floor.

Brachial valve concave in lateral profile. Inner surface marked by fine papillose elevations. Adductor muscle field large, ·subcircular in outline, reaching beyond the middle of the valve; inner scars bordered by moderately elevated septa; occasional specimens displaying low median septum. Brachiophores large, strongly divergent, and ending in points; cardinal process strongly elevated ventrally. Interarea short, anacline.