Re. Ogren et R. Sluys, Selected characters of the copulatory organs in the land planarian family Bipaliidae and their taxonomic significance (Tricladida : Terricola), HYDROBIOL, 383, 1998, pp. 77-82
Preliminary analysis was made of 76 species in the monotypic family Bipalii
dae, for which the copulatory apparatus has been described. Four characters
from the copulatory organs were selected: profile of the female organ (thr
ee character states), approachment of the ovovitelline ducts to the female
organ (two states), shape of the penial papilla (two states), and shape of
the male antrum wall (three states). Data were scored for five preliminary
ingroup taxa, viz., the restricted genus Placocephalus, and four other a pr
iori defined subgroups within the family, viz., the genus Bipalium sensu st
ricto and three other informal taxonomic groupings. An artificial outgroup
taxon was constructed on the basis of character states generalized from the
Geoplanidae subfamilies Caenoplaninae, Pelmatoplaninae and Rhynchodemidae
subfamily Microplaninae. Analysis of the data matrix resulted in a single m
ost parsimonious tree with the following topology: (outgroup (Placocephalus
(Bipalium, group A (group B1, group B2)))).