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Ptychopleurella rectangulata laciniata

Rhynchonellata - Orthida - Hesperorthidae

Taxonomy
Ptychopleurella rectangulata laciniata was named by Williams (1962). Its type specimen is BB.25922, a shell (complete shell), and it is a 3D body fossil.

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1962Ptychopleurella rectangulata laciniata Williams pp. 111 - 112 figs. Pl. IX, figs. 30, 33-36

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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
superfamilyOrthoideaWoodward 1852
familyHesperorthidaeSchuchert and Cooper 1931
genusPtychopleurellaSchuchert and Cooper 1931
speciesrectangulata
subspecieslaciniata

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
A. Williams 1962Subrectangular, strongly and subequally biconvex Ptychopleurella with the brachial valve about three-fifths as long as wide; radial ornamentation consisting of 11-16 costae, most commonly 14 or 15, and exceptionally augmented by 2 incipient submedian costellae and further ornamented by lamellae, averaging 4 per millimetre at the antero-median margins of shells in excess of 2 mm. long; ventral muscle-scar cordate, over four-fifths as long as wide and extending anteriorly for less than onethird the length of the pedicle valve.