(2007)
Volume
39
Part
4
Page from
467
Discus rotundatus (0. F. Müller, 1774), D. ruderatus (Férussac, 1821) and D. perspectivus (Megerle von Mühlfeld, 1818) carry some of their eggs in the umbilicus. We interpret such behaviour as an incipient parental care which has reached its perfection in some Pacific endodontids.
Keywords
reproduction
Land snails
Discus
behaviour.