Turbellarian taxonomic database

Acoela Antroposthiidae Diagnosis

Ventral mouth. Outer body wall with outer circular and inner longitudinal muscle. Ciliated male atrium inserted into a penis sheath or sac as a direct inpocketing of the epidermis = male antrum adjoins proximally a vesicula granulorum. Proximally an unciliated granular vesicle closes off the atrium directly. Seminal vesicle or false seminal vesicle present. Male gonopore ventral or terminal at posterior end. Without penis.

[From Faubel A (1976)]

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