|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Leptaena (Leptaena) enucleata
Strophomenata - Strophomenida - Rafinesquinidae
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.
|L. E. Popov and L. R. M. Cocks 2014||Shell concavoconvex, with sharp anterior dorsal geniculation. Outline transverse subtrapezoidal, with maximum width at hinge line; cardinal extremities acute and alate. Ventral valve lateral profile very gently convex posterior to the geniculation, accentuated by high, angular rim and corresponding to the valve highest point. Ventral interarea apsacline with a small, convex pseudodeltidium. Dorsal valve concave, almost flat posterior to the geniculation. Dorsal interarea low, anacline, with strong, convex chilidium. Radial ornament almost equally multicostellate, with 4 to 5 rounded ribs per mm along the anterior margin of mature specimens. Concentric ornament with 5 to 8 slightly undulating rugae posterior to the geniculation and fine, crowded filae from 10 to 12 per mm. Ventral interior with small teeth, supported by thin, widely divergent dental plates. Ventral muscle field almost circular, surrounded by strong muscle bounding ridges. Dorsal interior with a double cardinal process on a low notothyrial platform, and low, almost straight, broadly divergent socket plates. Median septum and a pair of transmuscle ridges variably developed, which may be strong in some specimens and almost indiscernible in others from the same population.|