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Enbektenorthis molesta

Rhynchonellata - Orthida - Wangyuiidae

Taxonomy
Enbektenorthis molesta was named by Popov and Cocks (2014). Its type specimen is BC 58757, a valve (dorsal internal mould), and it is a 3D body fossil. It is the type species of Enbektenorthis.

Synonymy list
YearName and author
2014Enbektenorthis molesta Popov and Cocks pp. 739 - 740 figs. 16B', 23A–K

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
RankNameAuthor
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderOrthidinaSchuchert and Cooper 1932
superfamilyPlectorthoideaSchuchert and Le Vene 1929
familyWangyuiidaeZhang 1989
subfamilyWangyuiinaeZhang 1989
genusEnbektenorthis
speciesmolesta

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
L. E. Popov and L. R. M. Cocks 2014Shell slightly ventribiconvex, semioval, almost as long as wide to slightly transverse. Hinge line about 85% of shell width, which is posterior to midlength. Cardinal extremities obtusely rounded; anterior commissure weakly unisulcate to almost rectimarginate. Ventral valve subcarinate posteriorly to mid-length; lateral profile moderately convex, with maximum height of about one-third valve length. Ventral interarea gently curved, strongly apsacline, up to 4 mm high. Delthyrium open, narrow triangular. Dorsal valve slightly transverse with a shallow median sulcus originating in the umbonal area and gradually fading anteriorly. Lateral profile of dorsal valve gently convex, with maximum height about one-third length anteriorly from the umbo. Dorsal interarea low, planar, anacline. Radial ornament multicostellate, with 5 to 7 ribs per 3 mm at the anterior margin of mature shells. Ventral interior with strong teeth supported by short, divergent dental plates. Muscle field on pseudospondylium slightly excavated anteriorly, subpentagonal, completely enclosed by muscle bounding ridges occupying about one-third shell length, with a broad, subtriangular adductor scar which is strongly raised anteriorly, and strongly impressed narrow, strip-like diductor scars. Mantle canal system saccate with slightly divergent proximal parts of vascula media . Dorsal interior lacking notothyrial platform, with a cardinal process differentiated on a bilobed myophore and a short shaft. Brachiophores bladelike, with short, almost subparallel bases. Narrow, quadripartite adductor muscle field usually weakly impressed, bordered laterally by faint muscle bounding ridges, open anteriorly and with larger anterior adductor scars. No median ridge.