Graff (1905) replaces the name Macrorhynchus by the senior synonym Polycystis. All species described as ... [details]
Graff (1905: p. 86) and Steinböck (1932: p.111) use the wrong gender of epithet: groenlandica [details]
Graff (1905) replaces the name Vortex by Dallyellia for reasons of priority. However in 1913 he mentions six ... [details]