Land molluscs from the Isola delle Femmine Nature Reserve (north-western Sicily, Italy) (Gastropoda Architaenioglossa Pulmonata) 1 Via Principe di Paternò 3, 90144 Palermo, Italy; e-mail: edizionidanaus@gmail.com 2 Dipartimento di Scienze agrarie, alimentari e forestali, Viale delle Scienze Edificio 4, 90128 Palermo, Italy; e-mail: salvatore.surdo@unipa.it Orcid: 0000-0002-0300-837X 3 Via Michele Cipolla 106, 90123 Palermo, Italy; e-mail: roberto.viviano@outlook.com 4 Via del Giubileo Magno 93, 90015 Cefalù, Italy; e-mail: fabioliberto@yahoo.it 5 Museo Civico di Storia Naturale, Via degli Studi 9, 97013 Comiso (Ragusa), Italy; e-mail: tinohawk@yahoo.it * Corresponding author ABSTRACT The results of a study on the fauna of land molluscs from Isola delle Femmine Nature Reserve (NW Sicily, Italy) (Gastropoda Architaenioglossa Pulmonata) are here described. In this small island 23 species have been found, 6 of which are Sicilian endemic taxa. Siciliaria leucophryna microinsularis n. ssp. endemic to the Isola delle Femmine (or Isola di Fuori) is described. For each species ecological, distributional data and information on their presence on this island are provided. INTRODUCTION The western Mediterranean Sea contains more than 1000 small islands, often less than 10 Km 2 wide. Some of them are poorly known or still to be explored. A lot of these host local endemics and have a more or less high biodiversity rate. In addition, they constitute a refuge area for many regional endemisms or threatened species of the neighbor areas like big islands or continental coast (see, for example, Lo Cascio & Pasta, 2012; Muscarella & Baragona, 2017; Lo Cascio & Sciberras, 2020). Small islands or archipelagos should play a significant role in conservation programs, and more investigations and deeper taxonomic knowledges are needed for this purpose (Minelli, 2012; Vela & Pavon, 2012). The aim of this work is to increase the knowledge on the living land molluscs of the Isola delle Femmine (or Isola di Fuori), a small island, on the north-western coast of Sicily (Italy). Isola delle Femmine Nature Reserve was established under decree n° 584, 01/09/1997 (Suppl. Ord. G.U.R.S. n° 3 the 16/01/1998) by Sicilian regional Government (Catalano et al., 1979) and managed by LIPU/Birdlife Italia. This island is a part of the regional protected areas belonging to Nature 2000 network under European Direttives 79/409/CEE (Birds Directive) and 92/43/CEE (“Habitat” Dir.) as Site of Community Importance with code ITA020005 KEY WORDS Conservation biology; micro-insularity; faunistic; land molluscs; Sicily. Ignazio Sparacio 1 , Salvatore Surdo 2* , Roberto Viviano 3 , Fabio Liberto 4 & Agatino Reitano 5 Biodiversity Journal, 2021,12 (3): 589–624 - https://doi.org/10.31396/Biodiv.Jour.2021.12.3.589.624 Received 06.04.2020; accepted 03.06.2021; published online 04.08.2021 https://zoobank.org:pub:986463AC-781A-4372-8674-38981C969405