Oncomelania hupensis nosophora; Katayama snail
A small tropical freshwater snail, known as an intermediate host for schistosomiasis in East Asia. The name is primarily used in medical and biological contexts.
The Katayama snail is an intermediate host for Schistosoma japonicum.
Rare kanji spelling; the katakana form is standard.
Named after the Katayama district in Yamanashi Prefecture, Japan, where the snail was first linked to schistosomiasis. The exact derivation of the name is uncertain.