The Incubation Period of the Eggs of Oncomelania Nosophora

Reproductive Seasonality and Developmental Characteristics of the Page Springsnail (Pyrgulopsis morrisoni)

“…This suggests that a female deposits one egg approximately every 8-10 days, findings which are within range of inter-ovipositional periods of 7 days observed in other hydrobiids (Otori et al 1956, Chi and Wagner 1957, Liang and van der Schalie 1975, Lassen and Clark 1979.…”