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Leptaena Oklahomensis
''Leptaena'' is an extinct genus of mid-sized brachiopod that existed from the Darriwilian, Dariwilian epoch to the Emsian, Emsian epoch, though some specimens have been found in strata as late in age as the Tournasian, Tournasian epoch. Like some other Strophomenida, Strophomenids, ''Lepteana'' were epifauna, epifaunal, meaning they lived on top of the seafloor, not buried within it, and were suspension feeder, suspension feeders. Physical description ''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. Their width is usually greater than their length, like most Strophomenida, Strophomenids. Distribution ''Leptaena'' fossils have been found on every continent except Antarctica. Species ''Leptaena'' was a diverse genus, with over 70 recognized species and subgenus, subgenera. Species in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptaena Rugosa
''Leptaena'' is an extinct genus of mid-sized brachiopod that existed from the Dariwilian epoch to the Emsian epoch, though some specimens have been found in strata as late in age as the Tournasian epoch. Like some other Strophomenids, ''Lepteana'' were epifaunal, meaning they lived on top of the seafloor, not buried within it, and were suspension feeders. Physical description ''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. Their width is usually greater than their length, like most Strophomenids. Distribution ''Leptaena'' fossils have been found on every continent except Antarctica. Species ''Leptaena'' was a diverse genus, with over 70 recognized species and subgenera In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus. In the International ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |