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Anisopleurella tricostata

Strophomenata - Strophomenida - Sowerbyellidae

Anisopleurella tricostata was named by Rasmussen et al. (2012). Its type specimen is MGUH 29481 and is a 3D body fossil. Its type locality is Locality A-1230 Blocks 4-6, which is in an Ashbyan deep subtidal ramp limestone/siltstone in the Telsitna Formation of Alaska.

Sister species lacking formal opinion data

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Synonymy list
YearName and author
2012Anisopleurella tricostata Rasmussen et al. p. 21 figs. Plate 3, figures 8–12

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phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyPlectambonitoideaJones 1928
familySowerbyellidaeOpik 1930
subfamilySowerbyellinaeOpik 1930
genusAnisopleurellaCooper 1956

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.

C. M. O. Rasmussen et al. 2012Shell moderately concavo-convex, with transverse outline, twice as wide as long. Cardinal angles acute. Apical pseudodeltidium possibly present. Chilidium present. Faintly developed unequally parvicostellate ornamentation with three prominent costae. Angle of 45 degrees between two consecutive costae. Ventral interior with small teeth, not supported by dental plates. Dorsal interior with undercut, probably bilobed, cardinal process. Socket ridges wide, curving back laterally towards hinge line. Anteriorly elevated dorsal median ridge and pair of prominent side septa. Side septa bisecting, but confined within a bilobed, subelliptical bema.