Rhynchonellata - Orthida - Schizophoriidae

Alternative combination: Orthis derbyi

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 Orthotichia according to L. Li et al. 1986

Sister taxa: Orthotichia altilis, Orthotichia avushensis, Orthotichia chekiangensis, Orthotichia fushanensis, Orthotichia gypidularhynchia, Orthotichia hueconiana, Orthotichia irregularis, Orthotichia japonica, Orthotichia jiangxiensis, Orthotichia kozlowskii, Orthotichia latirostrata, Orthotichia lengshuixiensis, Orthotichia lentiformis, Orthotichia magnifica, Orthotichia marmorea, Orthotichia morganiana, Orthotichia nana, Orthotichia nawtawaketensis, Orthotichia newelli, Orthotichia parva, Orthotichia pentamera, Orthotichia sulcata, Orthotichia tongluensis, Orthotichia transversa, Orthotichia trigona, Orthotichia xizangensis

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 20.9 x 22.7