Toledonia Dall, 1902 The genus Toledonia was created by Dall (1902) for the species T. perplexa. It is characterised by a small, thin shell that is smooth or can have spiral furrows. The spire is elevated resembling an Acteon. The foot is not forked and the prostate is not divided. Usually there is a diverticulum present between the buccal mass and gizzard and the denticulated rachidian tooth can be flanked by up to two lateral plate-like teeth (Dall 1902; Marcus 1976; Golding 2010).

Published as part of Ohnheiser, Lena Tina & Malaquias, Manuel António E., 2014, The family Diaphanidae (Gastropoda: Heterobranchia: Cephalaspidea) in Europe, with a redescription of the enigmatic species C olobocephalus costellatus M. Sars, 1870, pp. 501-522 in Zootaxa 3774 (6) on page 511, DOI: 10.11646/zootaxa.3774.6.1, http://zenodo.org/record/227215