Pulmonate snails, like many other molluscs, are simultaneous hermaphrodites that generally retain the ability to selffertilize (Duncan 1975).They provide an excellent model system for studies on mating systems and inbreeding Low polymorphism at 19 microsatellite loci in a French population of Argentine ants (Linepithema humile)
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Krieger et al. (1997) studied this question.