Alzoniella
Alzoniella is a genus of minute freshwater spring snails, aquatic gastropod mollusks or micromollusks in the subfamily Islamiinae of the family Hydrobiidae.
Description
All the species within the snail genus Alzoniella are crenobiotic, i.e. they are dependent on springs as a habitat. Some are stygobiont, i.e. living exclusively in underground rivers. They are tiny to minute, usually with delicate, elongated, white or translucent shells. The conical to cylindrical-conical shells often have smooth or finely striated surfaces, and the three to four whorls are quite convex with deep sutures.Distribution
Alzoniella is primarily found in Europe, often in very localized, isolated habitats, with some species restricted to underground freshwater habitats such as specific springs or cave systems.Species
The genus Alzoniella contains the following species:Alzoniella asturica Alzoniella bergomensis Pezzoli, 2010Alzoniella borberensis Bodon & Cianfanelli, 2022Alzoniella braccoensis Bodon & Cianfanelli, 2004Alzoniella calorensis Cianfanelli & Bodon, 2017Alzoniella camocaensis Rolán & Boeters, 2015Alzoniella cantabrica Alzoniella cervarensis Cianfanelli, Talenti, Nardi & Bodon, 2019Alzoniella cornucopia Alzoniella delmastroi Bodon & Cianfanelli, 2004Alzoniella edmulndi Alzoniella fabrianensis Alzoniella feneriensis Fo. Giusti & Bodon, 1984Alzoniella finalina Giusti & Bodon, 1984Alzoniella galaica Alzoniella haicabia Boeters, 2000Alzoniella hartwigschuetti Alzoniella iberopyrenaica Arconada, Rolán & Boeters, 2007Alzoniella isoensis Bodon & Cianfanelli, 2022Alzoniella junqua Boeters, 2000Alzoniella katagabriellae Varga, 2021Alzoniella ligustica Alzoniella lucensis Alzoniella lunensis Bodon & Cianfanelli, 2002Alzoniella macrostoma Bodon & Cianfanelli, 2002Alzoniella manganellii Bodon, Cianfanelli & Talenti, 1997Alzoniella marianae Arconada, Rolán & Boeters, 2007Alzoniella microstoma Bodon & Cianfanelli, 2002Alzoniella montana Alzoniella murita Boeters, 2003Alzoniella navarrensis Boeters, 1999 onatensis Boeters, 2003Alzoniella ovetensis Alzoniella parvula Alzoniella perrisii Alzoniella pyrenaica Boeters, 1983Alzoniella rolani Alzoniella sigestra Fo. Giusti & Bodon, 1984Alzoniella slovenica Alzoniella somiedoensis Rolán, Arconada & Boeters, 2009Alzoniella tanagrensis Cianfanelli & Bodon, 2017;Synonyms:Alzoniella Boeters, 2000 : synonym of Navarriella Boeters, 2000 Alzoniella elliptica : synonym of Navarriella elliptica Alzoniella pellitica Arconada, Rolán & Boeters, 2007: synonym of ''Navarriella elliptica''