ammonites
Acosarina janiceps Waagen 1884 (lamp shell)

Rhynchonellata - Orthida - Schizophoriidae

Alternative combination: Orthis janiceps

Full reference: W. Waagen. 1884. Productus Limestone Fossils, Part IV, fas. 3. Salt Range Fossils, Palaeontologia Indica, Series 13 1(4):547-610

Belongs to Acosarina according to L. Lee and F. Gu 1980

Sister taxa: Acosarina aethopa, Acosarina antesulcata, Acosarina baylorensis, Acosarina circular, Acosarina dorashamensis, Acosarina dunbari, Acosarina fecunda, Acosarina grandis, Acosarina incisiva, Acosarina juresanensis, Acosarina mesoplatys, Acosarina minuta, Acosarina monocosta, Acosarina rectimarginata, Acosarina regularis

Type specimen: Its type locality is East of Katwahi, middle compact Middle Productus-limestone, Salt Range, which is in a Wuchiapingian carbonate limestone in the Wargal Formation of Pakistan

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 15.0 x 17.5