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Orthis (Hebertella) scotica

Rhynchonellata - Orthida - Plectorthidae

Taxonomy
Orthis scotica was named by McCoy (1852).

It was recombined as Orthis (Hebertella) scotica by Reed (1917); it was recombined as Plectorthis scotica by Williams (1962), Mitchell (1977), Candela and Harper (2014).

Sister species lacking formal opinion data
O. arcuata, O. dehmollaensis, O. resupinata

Synonymy list
YearName and author
1852Orthis scotica McCoy p. 232 figs. pl. III, figs. 29, 29a, 29b
1917Orthis (Hebertella) scotica Reed p. 844 figs. pl. viii, figs. 19-23
1962Plectorthis scotica Williams pp. 121 - 122 figs. Pl. X, figs. 20, 21, 24; P1. XI, figs. 1-3, 7
1977Plectorthis scotica Mitchell
2014Plectorthis scotica Candela and Harper pp. Supplement 1

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
—Lophophorata
—PanbrachiopodaCarlson and Cohen 2020
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderOrthidinaSchuchert and Cooper 1932
superfamilyPlectorthoideaSchuchert and Le Vene 1929
familyPlectorthidaeSchuchert and Le Vene 1929
genusOrthisHall and Clarke 1892
subgenusHebertella
speciesscotica(McCoy 1852)

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
A. Williams 1962Subrectangular, subequaUy biconvex Plectorthis, brachial valve just over two-thirds as long as wide and slightly more than one-third as deep as long, commonly with a shallow sulcus bounded by elevated flanks, complementary ventral sulcus shallow and wide; ornamentation dichotomously costellate with 14-18 neanic costae bifurcating within a few millimetres of the umbo, so that the adult shell appears to be multicostate with 29-36 (most commonly 35 or 36) strong, rounded "costae" with a wave-length of 1 mm. at about 10 mm. antero-medianly of the umbo and separated by interspaces of about the same width bearing concentric lamellae and radial filae; ventral muscle-scar acutely triangular, about three-fifths as wide as long and extending forward for about two-fifths the length of the pedicle valve, vascula media divergent; cardinal process blade-like.