Crassiplana Hyman 1955

Pseudostylochidae with tentacles, tentacular, brain and marginal eyes. Genital pores separate, placed posteriorly. Male copulatory apparatus with penis papilla. Free prostatic vesicle with strongly muscular wall. Internal epithelium of prostatic vesicle glandular and with conspicuous projections. Seminal vesicle present. Vagina very long and reaching anteriorly. Lang’s vesicle absent. Genito-intestinal duct present.