El caragol terrestre Lychnopsis i altres tàxons relacionats del Paleogen de Mallorca (Mediterrània occidental)

THE LAND SNAIL LYCHNOPSIS AND OTHER RELATED TAXA FROM THE PALAEOGENE OF MALLORCA (WESTERN MEDITERRANEAN). The Palaeogene was a key period for the diversification of terrestrial snails, marking the origin of many lineages that persist to the present day. Continental mollusc assemblages from the Eocene and Oligocene of Mallorca (Balearic Islands, western Mediterranean) have been known for over a century and are notable for their high degree of endemism. However, only a small fraction of these faunas has so far been studied in detail. Among the poorly understood taxa are two of the most enigmatic Cenozoic land snails, ‘Lychnus’ hermitei and Lychnopsis bofilli, which have never been confidently assigned to any pulmonate family. This study re-examines these two species based on their type material, together with five additional related forms recovered from the same lithological units. These taxa are assigned to three genera: Anthracocycla gen. nov. (A. decipiens sp. nov. and A. hermitei comb. nov.), Ensaimadina gen. nov. (E. bauzai sp. nov. and E. mallorquina sp. nov.), and Lychnopsis (L. applanata sp. nov., L. bofilli, and L. juarezi sp. nov.). This work contributes to a better understanding of the poorly known Paleogene gastropod assemblages of the Balearic Islands.Keywords: Mollusca, Stylommatophora, Eocene, Oligocene, Balearic Islands.