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Paralenorthis semnanensis

Rhynchonellata - Orthida - Orthidae

Taxonomy
Paralenorthis semnanensis was named by Popov et al. (2009). Its type specimen is 2004.22G.699, a valve (dorsal internal and external mould;), and it is a 3D body fossil.

Synonymy list
YearName and author
2009Paralenorthis semnanensis Popov et al. pp. 40 - 41 figs. Plate 2, figures 2–11

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderOrthidinaSchuchert and Cooper 1932
superfamilyOrthoideaWoodward 1852
familyOrthidaeWoodward 1852
genusParalenorthisHavlicek and Branisa 1980
speciessemnanensis

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 et al. 2009Ventribiconvex, about 75–80 per cent as long as wide; hinge line slightly shorter than maximum shell width which is close to mid-length, cardinal extremities obtuse; ventral valve evenly convex in transverse and lateral profiles; dorsal valve lacking distinct median sulcus; radial ornament of 18–27 ribs and superimposed fine capillae at about seven to nine per 1 mm.