ammonites
Pseudospiriferina tsinghaiensis Yang and Yin 1962 (lamp shell)

Rhynchonellata - Spiriferinida - Spiriferellinidae

Alternative combination: Spiriferina tsinghaiensis

Belongs to Pseudospiriferina according to G. R. Xu and G. C. Liu 1983

Sister taxa: Pseudospiriferina biplicata, Pseudospiriferina lipoldiformis, Pseudospiriferina multicostata, Pseudospiriferina paucicostata, Pseudospiriferina pauciplicata, Pseudospiriferina pinguis, Pseudospiriferina variabilis

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 10.4 x 13.7, valve 15.7 x 27.0