Turbellarian taxonomic database

Trigonostomidae Trigonostominae Diagnosis


Vitellaria caudally continuing into the germaria efferent;
deferent tracts of the female copulatory organ connecting the fecundatorium and the atrium genitale commune;
efferent tract always provided with a cuticular bursal appendage;
vasa defferentia widened into two spermaducal vesicles, before they enter the muscular part of the copulatory organ (except in Marinella, where only one spermaducal vesicle occurs);
male cuticular copulatory organ consisting of the penis stylet and mostly also of the stiffened wall of the male genital atrium (except in Beklemycheviella);
margin of the pharynx without cilia (except Marinella);

Notes from synonyms

Diagnosis for Trigonostomidae Proxenetinae

Trigonostomidae mit getrennten zuführenden (Bursa copulatrix, Ductus spermaticus, Receptaculum seminis, Mundstücke) und abführenden Wegen (weiblicher Genitalkanal) zwischen Keimdotterstock und Atrium genitale. Germarium eine direkte kausale Fortsetzung des Vitellariums bildend. Pharynxsaum unbewimpert. Vorderende des Körpers nicht rüsselartig.

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