Alien species and greenhouses: new data from the Botanical Garden of Palermo (Sicily, Italy) (Diplopoda and Mollusca)

On the basis of specific research carried out recently at the Botanical Garden of Palermo (Sicily, Italy), a new list of alien species is presented. In particular, two species of millipedes Choneiulus palmatus (Nĕmec, 1895) (Julida Blaniulidae) and Poratia obliterata (Kraus, 1960) (Polydesmida Pyrgodesmidae), and four species of terrestrial molluscs Zonitoides arboreus (Say, 1817) (Gastropoda Gastrodontidae), Allopeas clavulinum (Potiez et Michaud, 1838), Opeas opella Pilsbry et Vanatta, 1906 (Gastropoda Achatinidae), and an indeterminate species of the familia Charopidae.