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The penial stalk of the Zonitoides nitidus (O. F. Muller, 1774) spermathecal duct is found to be an additional allosperm container. Inside the penial stalk of spermathecal duct, sperm was observed in hemiphallic snails only. At the same time, some specimens had sperm inside the penis. The atrial stalk of spermathecal duct is the distal part of spermathecal duct.

The penial stalk of the Zonitoides nitidus (O. F. Müller, 1774) (Gastropoda: Pulmonata: Gastrodontidae) spermathecal duct as an allosperm container