Taxon - Links and literature
species
Caecum johnsoni Winkley, 1908
Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Caecum johnsoni Winkley, 1908]Data retrieved on: 23 November 2013
Paleobiology Database [158627]
Paleobiology Database [https://paleobiodb.org/] [as Caecum johnsoni (Winkley, 1908)]
Data retrieved on: 28 January 2018