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Dolerorthis rankini

Rhynchonellata - Orthida - Hesperorthidae

Orthis rankini was named by Davidson (1883) [Orthis Rankini].

It was recombined as Orthis (Dalmanella) rankini by Reed (1917); it was recombined as Dolerorthis rankini by Williams (1962) and Candela and Harper (2014).

Synonymy list
YearName and author
1883Orthis rankini Davidson pp. 190, 226 figs. pl. xi, figs. 17-19
1917Orthis (Dalmanella) rankini Reed p. 852 figs. pl. ix, figs. 31-37; pl. x, figs. 1-3.
1962Dolerorthis rankini Williams p. 114 figs. P1. IX, figs. 28, 29, 39, 40
2014Dolerorthis rankini Candela and Harper pp. Supplement 1

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phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderOrthidinaSchuchert and Cooper 1932
superfamilyOrthoideaWoodward 1852
familyHesperorthidaeSchuchert and Cooper 1931
genusDolerorthisSchuchert and Cooper 1931
speciesrankini(Davidson 1883)

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.

A. Williams 1962Subquadrate Dolerorthis with a subcarinate pedicle valve about one-quarter as deep as long and a more gently convex, strongly sulcate brachial valve about four-fifths as long as wide; interareas of both valves long and curved, delthyrium narrow and slot-like; ornamentation concentrically lamellose and finely multicostellate with over 90 costellae in adult shells averaging about 14 per 5 ram. anteromedianly; teeth strong, dental lamellae short and receding, continuous with low ridges forming the lateral boundaries to a slightly elevated rhomboidal muscle-scar over two-thirds as wide as long and extending forward for one-third the length of the pedicle valve, adductor scar lanceolate, diductor scars continuous anteriorly with a pair of subjacent vascula media, separated from each other by only a median depression; cardinal process thin and plate-like, flanked by a pair of subsidiary ridges also arising from the notothyrial floor; notothyrial platform massive, encrusting brachiophore bases and extending anteriorly as a broad median ridge; dorsal adductor scars small, limited to the posterior quarter of the valve floor and behind two pairs of strong divergent sinuses which are interpreted as vascula media.