Hooge MD 2003 (citation) - Male copulatory organ a multi-layered seminal vesicle composed of five layers of alternating longitudinal and circular muscles: outer-longitudinal muscles, outer-circular muscles, middle-longitudinal muscles, inner-circular muscles, and inner-longitudinal muscles. Epithelium-lined lumen of seminal vesicle opens proximally to false seminal vesicle and distally to ciliated male antrum and terminal male gonopore. Invaginated penis absent.[From Hooge MD (2003)]
Diagnosis for the valid (accepted) taxonomic name
Diagnosis for Crucimusculata Proporidae
Male copulatory organ posteroterminal, seminal vesicle present. Pharynx, when present located anteriorly. Ovaries never reaching behind testesReturn to Crucimusculata Proporidae