CANDIDULA ULTIMA (MOUSSON, 1872) (MOLLUSCA, PULMONATA, HYGROMIIDAE), A NICE CASE OF ADAPTIVE CONVERGENCE

Leucorhroa ultima Mousson (recent), L. pressa Mousson (recent) and L. accola Mousson (subfossil) are three nominal taxa of the Canarian isla nd of Fuerteventura, traditionally referred to the family Sphincteroch ilidae due to shell characteristics and way of life. Our investigation showed that they really belong to the hygromiid genus Candidula, bein g a nice example of convergent adaptation with the Sphincterochilidae. It is the southernmost known case of autochthonous presence of the ge nus, which arrived from the mainland of Africa likely posteriorly to t he last glaciation, between 30-50 thousand years ago. Lectotypes oft. ultima, L. pressa and L, accola are designated and figured. L. pressa and L. accola are treated as junior synonyms oft. L. ultima.