Leptaena
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| Leptaena Temporal range: | |
|---|---|
 | |
| Leptaena rhomboidalis | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Brachiopoda |
| Class: | †Strophomenata |
| Order: | †Strophomenida |
| Family: | †Rafinesquinidae |
| Subfamily: | †Leptaeninae |
| Genus: | †Leptaena Dalman, 1828 |
| Type species | |
| Leptaena rugosa Dalman, 1828 | |
| Species | |
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See Species | |
| Synonyms | |
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Leptaena is an extinct genus of mid-sized brachiopod that existed from the Dariwilian epoch to the Emsian epoch,[1][2] though some specimens have been found in strata as late in age as the Tournasian epoch.[1][3] Like some other Strophomenids, Lepteana were epifaunal, meaning they lived on top of the seafloor, not buried within it, and were suspension feeders.[4]
Leptaena usually have concentric wrinkling and concentric lines on the shell. Leptaena have a concavo-convex profile, and are sometimes Semiquadrate to semielliptical. The Cardinal Process is split in two and the hinge line is straight.[4] Their width is usually greater than their length, like most Strophomenids.
