Argna Argna biplicata Argna ferrari Argna bielzi Argnidae Gaspard Michaud Xerocrassa geyeri Yeidji List of vulnerable molluscs List of least concern molluscs List of non-marine molluscs of Ukraine List of non-marine molluscs of Poland List of non-marine molluscs of Slovakia List of vulnerable invertebrates List of non-marine molluscs of Austria IUCN Red List vulnerable species (Animalia) List of non-marine molluscs of Spain List of gastropods described in 2016 Agardhiella (gastropod)