Dorjes J 1968 (citation)- sets up new family for his new species and new genus, p 109. Definition of type genus and species Antigonaria arenaria Dorjes 1968. "Acoels with mouth lying ventrally in anterior end. Male reproductive pore shortly behind this. Hermaphroditic gonad in the middle of body. Sperm development from anterior end, a long, ciliated antrum tube and a false seminal vesicle. A true seminal vesicle and penis lacking, as well as all female accessory organs." Crezee M 1975 (citation)- p 839- eggs develop from posterior end.
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