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Lingulasma quaestor

Lingulata - Lingulida - Lingulasmatidae

Taxonomy
Lingulasma quaestor was named by Reed (1917) [Lingulasma? quaestor = Lingula granulata Phillips, Davidson 1883, p. 207, pl. xvii, figs. 20, 21.].

It was recombined as Lingulella quaestor by Reed (1917) and Williams (1962).

Sister species lacking formal opinion data
L. compactum

Synonymy list
YearName and author
1917Lingulella quaestor Reed
1917Lingulasma quaestor Reed p. 810 figs. pl. iii, figs. 2-4.
1962Lingulella quaestor Williams pp. 81 - 82 figs. P1. VI, figs. 7, 8, 10

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
—Lophophorata
—PanbrachiopodaCarlson and Cohen 2020
RankNameAuthor
phylumBrachiopodaCuvier 1805
subphylumLinguliformeaWilliams et al. 1996
classLingulataGorjansky and Popov 1985
orderLingulidaWaagen 1885
superfamilyLinguloideaMenke 1828
familyLingulasmatidaeWinchell and Schuchert 1893
genusLingulasma
speciesquaestor

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.

†Lingulasma quaestor Reed 1917
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Diagnosis
ReferenceDiagnosis
A. Williams 1962Dark-brown, elongate, parallel-sided and gently biconvex Lingulella, ventral umbo
obtuse, pedicle valve almost two-thirds as wide as long; ornamentation consisting of fine, crowded, concentric raised lines, about 16 per millimetre antero-medianly, as well as variably spaced concentric growth-ridges; dorsal interior with a well-defined median ridge extending forward for over half the length of the
brachial valve and separating a pair of narrow, wedge-shaped, slightly raised areas radiating from the umbo; ventral interior with a low, broad, median ridge extending anteriorly for about one-haft the length of the pedicle valve and united with a pair of reniform raised areas which are disposed normally to the median ridge at about two-fifths of the length of the valve.