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Valcourea confinis

Rhynchonellata - Orthida - Plaesiomyidae

Taxonomy
Orthis confinis was named by Salter (1849).

It was recombined as Orthis (Heterorthis) confinis by Reed (1917); it was recombined as Valcourea confinis by Williams (1962), Candela and Harper (2014) and Liljeroth et al. (2017).

Synonymy list
YearName and author
1848Orthis confinis Salter p. 15 figs. pl. i, fig. 4
1849Orthis confinis Salter p. 15 figs. pl. I, fig. 4
1917Orthis (Heterorthis) confinis Reed p. 847 figs. pl. viii, figs. 26-33
1962Valcourea confinis Williams p. 117 figs. Pl. X, figs. 8, 10, 11, 13, 14
2014Valcourea confinis Candela and Harper pp. Supplement 1
2017Valcourea confinis Liljeroth et al.

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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
suborderOrthidinaSchuchert and Cooper 1932
superfamilyOrthoideaWoodward 1852
familyPlaesiomyidaeSchuchert 1913
subfamilyPlaesiomyinaeSchuchert 1913
genusValcoureaRaymond 1911
speciesconfinis(Salter 1849)

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 1962Semicircular, convexo-concave Valcourea about three-fifths as long as wide in ventral outline with a sharp, ventral, median fold and complementary dorsal sulcus tending to disappear in adult stages of growth, brachial valve less than one-fifth as deep as wide; costellate ornamentation finely developed, varying from 12 to 19 costellae, most commonly 15, per 5 mm. at the medio-anterior margin, and cancellated by closely spaced, delicate concentric lamellae; ventral muscle-scar long and subflabeUate, more than two-fifths the length of the pedicle valve, and almost as wide as long; ventral pallial sinus pattern saccate; myophore strong, bulbous, trilobed with a high median carina, sockets large, flaring laterally; dorsal adductor field divided by a short median ridge continuous with the cardinal process shaft, rarely deeply impressed, extending anteriorly for less than two-fifths the length of the valve; dorsal pallial sinus pattern pinnate.