Terrestrial flatworms have been extensively studied in Asia for the pa
st century with 208 spp. being recognized in South East Asia and 32 sp
p. in the Far East. The dominant family is the Bipaliidae with 136 Bip
alium spp. The following genera of the Rhynchodemidae are prominent: D
olichoplana (7 spp.) Platydemus (5 spp.) and Rhynchodemus (18 spp.) Rh
ynchodeminae); Othelosoma (7 spp.) and Microplana (7 spp.) (Microplani
nae). More restricted rhynchodemid genera are Cotyloplana (6 spp.), Di
gonopyla (2 spp.) and Pseudartiocotylus (1 sp.). In the Geoplanidae, t
here are no Asian Geoplaninae; a few genera of Caenoplaninae: Artiopos
thia (1 sp.), Caenoplana (4 spp.), Kontikia (5 spp); Pelmatoplaninae (
13 spp.) are mainly in the Oriental Region: Beauchampius (9 spp.) and
Pelmatoplana (4 spp.). Globally, species inquirendae are common and ha
mper modern classification.