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Craigella grayiae

Strophomenata - Orthotetida - Triplesiidae

Taxonomy
Triplesia grayiae was named by Davidson (1870) [Triplesia Grayiae]. It is the type species of Epacroplecia.

It was recombined as Cliftonia grayiae by Reed (1917); it was recombined as Epacroplecia grayiae by Williams (1962) and Mitchell (1977); it was recombined as Craigella grayiae by Candela and Harper (2014).

Synonymy list
YearName and author
1870Triplesia grayiae Davidson p. 198 figs. pl. xxiv, figs. 31, 32; pl. xxv, figs. 9, 10, 11
1917Cliftonia grayiae Reed p. 913 figs. pl. xx, figs. 26, 27.
1962Epacroplecia grayiae Williams pp. 156 - 157 figs. Pl. XIV, figs. 6-17
1977Epacroplecia grayiae Mitchell
2014Craigella grayiae Candela and Harper pp. Supplement 1

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderOrthotetidaWaagen 1884
suborderTriplesiidinaMoore 1952
superfamilyTriplesioideaSchuchert 1913
familyTriplesiidaeSchuchert 1913
genusCraigella
speciesgrayiae(Davidson 1870)

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
A. Williams 1962Trigonal, unequally biconvex Epacroplecia with a short hinge-line less than one-half the maximum width of the shell; adult brachial valves over four-fifths as long as wide and about two-thirds as deep as long and so strongly inflated in a trilobate manner as to produce an auriculate effect in the postero-lateral areas; dorsal fold commonly sharp and arising at about 4 mm. anterior to the umbo; radial ornamentation consisting of fine, equal costellae, between 6 and 8 per millimetre; ventral umbo commonly long, erect, pedicle valve gently convex and strongly geniculate to project dorsally as a median tongue.