Turbellarian taxonomic database

author date   title journal / publication
Johnson JR 1822 index card avail.
 
Observations on the genus Planaria. Philos. Transact. of the Royal Soc. of London. 1822 part 2, 437-447, tab 49.
Ijimia cornuta (Johnston, 1822) w primary taxonomic authority (describer)
Polycelis cornuta Johnston, 1822 w primary taxonomic authority (describer)