Turbellarian taxonomic database
Acoela Haploposthiidae Diagnosis
Westblad E 1948 (citation); see also Dörjes (citation) - Acoels with simple copulatory organs. In most cases this organ consists of a tube-shaped male antrum and a spherical seminal vesicle. Either the antrum or the seminal vesicle or both can be absent. Penis is lacking [but Haploposthia albiventer Marcus and H. rubra (An der Lan) have a very small penis papilla]. Male gonopore terminal, subterminal, or ventral. Mouth ventral.
[From Dorjes J (1968): 94]
Diagnosis for the valid (accepted) taxonomic name
Diagnosis for Crucimusculata ProporidaeMale copulatory organ posteroterminal, seminal vesicle present. Pharynx, when present located anteriorly. Ovaries never reaching behind testes
Return to Crucimusculata Proporidae