“…Current understanding of the evolutionary and ecological significance of self-fertilization versus outcrossing is mainly derived from investigation of terrestrial plant species (reviewed in Jarne and Charlesworth, 1993;Hedrick and Kalinowski, 2000;Goodwillie et al, 2005). The importance of such mating systems in animals has, however, rarely been investigated (reviewed in Jarne and Auld, 2006), though information on the importance of selfing in pulmonate snails (Jarne and Charlesworth, 1993;Jarne et al,1996Jarne et al, , 2000Trouvé et al, 2003;Henry et al, 2005), ascidians (Ryland and Bishop, 1990;Bishop and Ryland, 1993;Cohen, 1996;Jiang and Smith, 2005;Manríquez and Castilla, 2005) and platyhelminthes (Trouvé, et al, 1996) is starting to emerge.…”