Athyris

Athyris is a brachiopod genus with a subequally biconvex shell that is generally wider than long and a range that extends from the Silurian into the Triassic. Athyris is the type genus for the Athyrididae, which belongs to the articulate order Athyridida. R.C. Moore (1952) gives a shorter range, from the Mid Devonian to the Lower Mississippian. Alverezites, Bruntonites, and Meristospira are among related genera.

Some species originally included in Athyris have been reassigned.

A. aliena = Septathyris aliena A. headi = Catazyga A. megalotis = Comelicania megalotis A. peracuta = Janiceps peracuta A. royssii = Cleiothyridina royssii A. umbonata = Hindella umbonata

Composition: low Mg calcite Entire body: yes Adult length: 10 to < 100 Adult width: 10 to < 100 Adult height: 10 to < 100 Folds: minor Ribbing: minor Spines: none Internal reinforcement: none Locomotion: stationary Attached: yes Life habit: low-level epifaunal Diet: suspension feeder Vision: blind

File:Athyris concentrica pedunculate valve.jpg|''Athyris concentrica'', pedicle valve File:Athyris concentrica brachial valve.jpg|''Athyris concentrica'', brachial valve File:Athyris concentrica opening.jpg|''Athyris concentrica'', anterior view File:Athyris concentrica hinge.jpg|''Athyris concentrica'', posterior view File:Athyris concentrica lateral.jpg|''Athyris concentrica'', lateral view References: Aberhan et al. 2004, Hendy 2009