with mouth-gonopore in front end; one ciliated groove; esophagus simple and with weak walls;[From ()]
Notes from synonyms
Diagnosis for Prolecithophora Cylindrostomidae
Combinata with thick basement membrane and reinforced disc-like longitudinal musculature; brain with capsule; ciliated groove; intestine with tunic; gonads usually compact, with tunic; marine;
Diagnosis for Prolecithophora UlianiniidaeDiagnosis for the family Ulianiniidae nomen novum (= Gastropharyngidae Meixner, 1938): Prolecithophora with pharynx plicatus of pharynx variabilis medioventrally and separate common genital pore posteriorly. With anterior ciliary furrow (furrows) and encapsulated brain. (Eyeless.) Gondads without a tunic. Copulatory organ with unpaired external seminal vesicle, prostatic vesicle and secretory ejaculatory duct. One single genus, Ulianinia Levinsen, 1879, with the characteristics of the family. Type-species U. mollissima Levinsen, 1879.
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