||Nematode Caenorhabditis elegans
||AG Cattaneo, R Gornati, M Chiriva-Internati, G Bernardini, Ecotoxicology of nanomaterials: the role of invertebrate testing (2009) Publisher ISJ p. 85 right column 3rd paragraph in link
||Two sexes are described: a self-fertilizing true hermaphrodite, with two intra-abdominal gonads, one producing sperm, the other eggs. It is able to give rise to about 300 larvae in its life course. Males are occasionally and rarely produced (1/10^3).