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Testaprica ajaguzensis

Strophomenata - Strophomenida - Rafinesquinidae

Taxonomy
Strophomena ajaguzensis was named by Borissiak (1956). Its type specimen is CNIHR 64/7304 (dorsal internal mould) and is a 3D body fossil.

It was recombined as Testaprica ajaguzensis by Popov and Cocks (2014).

Synonymy list
YearName and author
1956Strophomena ajaguzensis Borissiak p. 53 figs. pl. 6, figs 1–6
2014Testaprica ajaguzensis Popov and Cocks pp. 709 - 710 figs. 11H, K–M, R, 12W

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyStrophomenoideaKing 1846
familyRafinesquinidaeSchuchert 1893
subfamilyRafinesquininaeSchuchert 1893
genusTestapricaPercival 2009
speciesajaguzensis(Borissiak 1956)

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
L. E. Popov and L. R. M. Cocks 2014Shell strongly concavoconvex, transverse and suboval in outline, with maximum width at or immediately anterior to the hinge line. Cardinal extremities slightly acute to almost rectangular. Anterior commissure rectimarginate, broadly rounded. Ventral valve gently and evenly concave, with an apsacline interarea and a triangular delthyrium completely covered by a convex pseudodeltidium. Lateral profile of dorsal valve strongly convex with maximum height slightly posterior to mid-length and flattened posterior slope. Dorsal interarea low, planar, apsacline; chilidial plates obscure. Radial ornament finely and almost evenly multicostellate with 4–6 ribs per 2 mm along the posterior margin of mature specimens, with irregular oblique rugellae along the dorsal posterior margin. Ventral interior with small teeth supported by low and divergent dental plates continuing as evenly rounded muscle-bounding ridges almost completely enclosing the ventral muscle field, with a narrow gap in the middle. Adductor scars lenticular, bisected throughout their entire length by a narrow median ridge which completely separates the diductor scars. Mantle canal impressions very poorly impressed, apart from the slightly divergent proximal parts of the vascula media. Prominent subperipheral rim near the lateral and anterior valve margins. Dorsal interior with delicate bilobed cardinal process, and straight, widely divergent socket plates. A pair of prominent side septa extends to the mid-valve, but median and outer side septa are absent.