Turbellarian taxonomic database
Marcus E 1945 (citation)- notes this is characterized by presence of male efferent organs at the extreme
anterior end of the prostomium, p 18, 54.
Marcus E 1945 (citation)- definition of family:
"Cerebrum large, oval, without subdivision into anterior and posterior lobes. The cerebrum is situated
nearly at the anterior end of the body and therefore, far from the mouth. A ciliated groove can occur
and that, very far anterior to the mouth: male copulatory apparatus developed either in young or adult
zooids with more or less complete elements. Excretory ducts are present." 1 Genus, Chordarium.