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Ptychopleurella rectangulata laciniata
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
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Ptychopleurella rectangulata laciniata Williams pp. 111 - 112 figs. Pl. IX, figs. 30, 33-36 |
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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.
†Ptychopleurella rectangulata laciniata Williams 1962
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Subrectangular, 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. |