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Anoptambonites pulchra

Strophomenata - Strophomenida - Hesperomenidae

Leptellina pulchra was named by Cooper (1956).

It was recombined as Anoptambonites pulchra by Rasmussen et al. (2012).

Sister species lacking formal opinion data

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Synonymy list
YearName and author
1956Leptellina pulchra Cooper p. 753 figs. pl. 189, A, figs. 1–23; pl. 195, C, figs. 9–16; pl. 219, G, fig. 14.
2012Anoptambonites pulchra Rasmussen et al. p. 30 figs. Plate 6, figures 15–20

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phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyPlectambonitoideaJones 1928
familyHesperomenidaeCooper 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 strongly concavo-convex to ventrally resupinate; outline transverse to subelliptical, about 60% as long as wide. Maximum width at hinge line or near posterior margin, with acute to right angled cardinal angles. Some specimens with weak dorsal fold anteriorly. Ventral valve evenly convex, with a medium to high, wide apsacline interarea. Small apical pseudodeltidium present in some specimens. Dorsal valve strongly concave, with a low, wide, anacline to catacline interarea. Chilidium absent. Unequally parvicostellate ornamentation, usually stronger on dorsal valves; 6–8 costellae per mm along anterior margin of mature specimens and 7 accentuated costae originating at umbo, extending to the anterior margin. Some specimens lamellose.

Ventral interior with small, divergent dental plates and weak elongate to bilobed muscle scar impressions. Dorsal interior with undercut cardinal process, brachiophores with divergent socket ridges merging to form a plate. In front of alveolus, the dorsal median septum becomes more elevated anteriorly and merges with bilobed platform elevated on all sides. Commonly the median septum is weakly bent towards the left when viewed perpendicularly. Muscle scar impressions faint. Transmuscle septa occasionally developed.