Toniciinae Pilsbry, 1893

Subfamily Toniciinae Pilsbry, 1893 View in CoL

Genus Lucilina Dall, 1882 View in CoL

Type species. Chiton confossus Gould, 1846 View in CoL (= Chiton lamellosus Quoy & Gaimard, 1835 View in CoL ), by subsequent designation ( Pilsbry 1893).

Distribution. Lucilina is known from the Oligocene to the Recent, with a modern distribution in the Indo-Pacific Ocean. The fossil record is quite scant, and includes the Oligocene of France ( Dell’Angelo et al. 2018a), the Miocene and Pliocene of the W. Pacific islands ( Ladd 1966; Schwabe et al. 2008), and the Pleistocene of the Red Sea ( Dell’Angelo et al. 2020a).

Remarks. Following the suggestions of some authors (e.g., Schwabe et al. 2008; Schwabe & Pittman 2014), and according to WoRMS (2024), the genus Lucilina is here considered as a separate genus, not a subgenus of Tonicia Gray, 1847 . It differs from the latter mainly by the position of the mucro in tail valve, subterminal in Lucilina and subcentral in Tonicia ( Kaas et al. 2006) . Moreover, the species of Tonicia are presently restricted to the southeastern Pacific region off south America, with one single species reported for the Caribbean; on the contrary, members of Lucilina are widespread throughout the entire tropical Indo-Pacific. The main characters of the species considered here are given in Tab. 16.

personal observations).