Blainville, 1828, sensu Lang, 1884
Planoceridae with a broadly-oval body bearing two slender nuchal tentacles situated in second quarter of body length. Eyes disposed in cerebral and tentacular groups; tentacular eyes form a ring at the base of each tentacle, cerebral eyes in two clusters between the tentacles. Pharynx centrally situated, with four or five pairs of deep lateral folds. Male and female genital pores separated, well anterior to hinder margin of the body. Male copulatory complex directed anteriorly from its aperture; seminal vesicle very muscular; prostatic organ independent, bulbous and muscular; intromittent organ represented by an eversible spacious cavity or cirrus-sac, lined with numerous small spines, sometimes also with one or more large thorn-like spines or hooks. Thick muscular envelope encloses prostatic organ and cirrus-sac. With vagina bulbosa and rudimentary Lang's vesicle; uterine canals not confluent anteriorly. Life-cycle, where known, involves Mülller's larva, either free or encapsulated.
Source: Prudhoe, 1982.
The following species of this genus occurs in the region:
Planocera folium