|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Leptaena (Leptaena) diademata
Strophomenata - Strophomenida - Rafinesquinidae
It was recombined as Leptaena (Leptaena) diademata by Candela and Harper (2014).
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.
|A. Williams 1962||Small, quadrate Leptaena with a biplanate visceral disc, between 6 and 8 mm. long, separated from the geniculate zone, which is disposed at about 110 ~ to the disc, by a wide, high, concentric corrugation of the entire shell, which is convex ventrally; brachial valve faintly sulcate medianly; radial ornamentation with closely spaced, differentially thickened costellae, about 8 per millimetre anteromedianly, disc corrugated by 7 low rugae tending to die out anteriorly; socket plates united by secondary shell deposit with a thick, short, median ridge to form an anchor-shaped elevation, dorsal muscle-scars impressed on either side of median ridge and further divided by two pairs of short, divergent septa, high median septum situated anterior to median ridge flanked by a pair of long, curved ridges; ventral interior unknown.|