World Register of Marine Species (WoRMS)
Verhoeff, T. (2026). World Brachiopoda Database. Rhytirhynchia Cooper, 1957. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=235174 on 2026-08-01
Cooper, G. A. (1957). Tertiary and Pleistocene brachiopods of Okinawa, Ryukyu Islands. United States Geological Survey, Professional Paper. 314-A:1–20, pl. 1–5.