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Fascifera carrickensis

Rhynchonellata - Orthida - Draboviidae

Taxonomy
Hemipronites carrickensis was named by Reed (1917) [= 1883. Strophomena retroflexa, Salter, Davidson (pars), Mm. Brit. Foss. Brack., vol. v, Silur. Suppl., p. 195, pi. xv, figs. 7-8,].

It was recombined as Fascifera carrickensis by Williams (1962) and Candela and Harper (2014).

Synonymy list
YearName and author
1917Hemipronites carrickensis Reed pp. 918 - 919 figs. Plate XXI, figs. 24-26
1962Fascifera carrickensis Williams pp. 148 - 149 figs. P1. XIII, fig. 19
2014Fascifera carrickensis Candela and Harper pp. Supplement 1

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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
suborderDalmanellidinaMoore 1952
superfamilyEnteletoideaWaagen 1884
familyDraboviidaeHavlicek 1950
subfamilyDraboviinaeHavlicek 1950
genusFasciferaUlrich and Cooper 1942
speciescarrickensis()

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
F. R. C. Reed 1917Shell semielliptical to subquadrate, unequally biconvex ; hinge-line rather less than maximum width ; cardinal angles subrectangular to obtuse. Pedicle-valve deepest at beak, conical, with somewhat flattened surface ; beak forming apex of cone, not incurved, the margins of hinge-area meeting at beak at very obtuse angle (about 130°-140°); hinge-area large, flat, triangular, steeply inclined to plane of valve, with narrow median delthyrium. Brachial valve gently convex, with weak median depression usually present; beak small, inconspicuous, not rising above hingeline; hinge-area narrow, steeply inclined.

Surface of valves covered with small rather unequal closely placed ro'unded threadlike lines increasing in number by intercalation more than once, every second or third or fourth line rather stronger than the others, and all arched back slightly on lateral portions of valves; 3—4 strong concentric lamellose growth-ridges usually present near margin, and fine concentric striation over rest of surface.