ammonites
Cleiothyridina ovalis Shi 1993 (lamp shell)

Rhynchonellata - Athyridida - Athyrididae

Full reference: G. R. Shi. 1993. N. W. Archbold. 1993. Systematic Palaeontology, in Aktastinian (Early Artinskian, Early Permian) brachiopods from the Jimba Jimba Calcarenite, Wooramel Group, Carnarvon Basin, Western Australia. Proceedings of the Royal Society of Victoria 105(2):187-202

Belongs to Cleiothyridina according to S. Z. Shen et al. 2001

Sister taxa: Athyris (Cleiothyridina) bajtuganensis, Athyris (Cleiothyridina) epigona, Athyris (Cleiothyridina) warchensis, Cleiothyridina accola, Cleiothyridina acutomarginalis, Cleiothyridina ailakensis, Cleiothyridina anabathra, Cleiothyridina attenuata, Cleiothyridina bajkurica, Cleiothyridina baracoodensis, Cleiothyridina barbata, Cleiothyridina capillata, Cleiothyridina circularis, Cleiothyridina ciriacksi, Cleiothyridina corculum, Cleiothyridina dalmiriensis, Cleiothyridina davidsoni, Cleiothyridina deroissyi, Cleiothyridina dilimensis, Cleiothyridina echidniformis, Cleiothyridina excavata, Cleiothyridina globulina, Cleiothyridina grossula, Cleiothyridina hayasakai, Cleiothyridina interposita, Cleiothyridina intonsa, Cleiothyridina laminosa, Cleiothyridina laqueata, Cleiothyridina macleayana, Cleiothyridina maynci, Cleiothyridina mulsa, Cleiothyridina nana, Cleiothyridina nielseni, Cleiothyridina nikolaevi, Cleiothyridina orbicularis, Cleiothyridina pectinifera, Cleiothyridina perthensis, Cleiothyridina pijaensis, Cleiothyridina pilularis, Cleiothyridina rara, Cleiothyridina rectimarginata, Cleiothyridina saraiensis, Cleiothyridina semiconcava, Cleiothyridina seriata, Cleiothyridina shenshuensis, Cleiothyridina simulans, Cleiothyridina solovjevae, Cleiothyridina subexpansa, Cleiothyridina tribulosa, Cleiothyridina tschironensis, Cleiothyridina uralica, Cleiothyridina xetriformis, Cleiothyridina zhexiensis, Cleiothyridellina accoliformis

Type specimen: GSWA F43896, a shell (Articulated shell). Its type locality is GSWA F94218, Jimba Jimba, Gascoyne River, which is in an Artinskian shallow subtidal packstone/lime mudstone in the Jimba Jimba Formation of Australia.

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 14.1 x 21.2, valve 11.1 x 13.6