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Leptelloidea leptelloides

Strophomenata - Strophomenida - Leptellinidae

Taxonomy
Plectambonites schmidti leptelloides was named by Bekker (1922). It is the type subspecies of Leptelloidea.

It was recombined as Leptelloidea leptelloides by Jones (1928) and Rasmussen et al. (2012).

Synonymy list
YearName and author
1921Plectambonites schmidti leptelloides Bekker
1922Plectambonites schmidti leptelloides Bekker
1928Leptelloidea leptelloides Jones
2012Leptelloidea leptelloides Rasmussen et al. p. 27 figs. Plate 5, figures 9–14

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
—Lophophorata
—PanbrachiopodaCarlson and Cohen 2020
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyPlectambonitoideaJones 1928
familyLeptellinidaeUlrich and Cooper 1936
subfamilyLeptellininaeUlrich and Cooper 1936
genusLeptelloideaJones 1928
speciesleptelloides(Bekker 1922)

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.

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Diagnosis
ReferenceDiagnosis
C. M. O. Rasmussen et al. 2012Shell moderately concave, transverse, subelliptical in outline. Maximum width probably at hinge line. Anterior commissure rectimarginate.Dorsal valve strongly concave,with a high,wide catacline interarea. Chilidiumabsent. Unequally parvicostellate ornamentation with relatively closely spaced accentuated costellae that are intercepted by accentuated costae.

Dorsal interior with large bulbous cardinal process projecting posteriorly from a closed, convex chilidium. Socket ridges wing-like, bending at right angles in the anterior direction and not supported by valve floor, laterally. Dorsal median septum more like an elevated, thick ridge with a pair of side septa extending just anterior of cardinalia as short caluses on platform floor. Anteriorly the septum fuses with valve floor to form a bilobed elevated platform that continues laterally towards the cardinal extremities, extending for at least half of valve area. Muscle impressions faint.