無窗貝屬（學名：）是無窗貝科無窗貝亞科下已滅絕的一個屬，生存在早泥盆紀至三疊紀的海洋中，具有近乎相等的雙凸外殼，一般寬度較長度大。
和本屬相關的屬有Alverezites、Bruntonites和Meristospira。
物種
*Athyris (Cliothyris) King, 1850
*Athyris ambiguaeformis Waagen, 1883
*Athyris angulata Mansuy, 1912
*Athyris bisulcata Jin & Hu, 1982
*Athyris cestriensis Snider, 1915
*Athyris concentrica von Buch, 1834
*Athyris damesi Fliegel, 1901
*Athyris globularis Phillips, 1835
*Athyris mirabilis Zeng & al., 1995
*Athyris plicatiformis Jin & Hu, 1982
*Athyris spiriferoides Eaton, 1831
*Athyris subquadrata Yang & Xu, 1966
*Athyris sulcata Yang & Xu, 1966
*Athyris xetra Diener, 1915
重新分配的物種
無窗貝屬下的有些物種現時已被置入其他的屬。
- A. aliena = Septathyris aliena
- A. headi = Catazyga headi
- A. megalotis = Comelicania megalotis
- A. peracuta = Janiceps peracuta
- A. royssii = Cleiothyridina royssii
- A. umbonata = Hindella umbonata
圖片
File:Athyris concentrica pedunculate valve.jpg|Athyris concentrica的腳狀瓣
File:Athyris concentrica brachial valve.jpg|Athyris concentrica的臂狀瓣
File:Athyris concentrica opening.jpg|Athyris concentrica的前視圖
File:Athyris concentrica hinge.jpg|Athyris concentrica的後視圖
File:Athyris concentrica lateral.jpg|Athyris concentrica的側視圖
參考文獻
- R.C Moore 1952. Brachiopods, Ch 6. Moore, Lalicker, and Fischer. Invertebrate Fossils, McGraw-Hill.
*[http://paleodb.org/cgi-bin/bridge.pl?action=basicTaxonInfo&taxon_no=29105 Athyris data]
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