Five new Liphistius species are described: L. lahu from northern Thail
and, L. isan from northeastern Thailand, L. sayam from central Thailan
d, L. phileion from southeastern Thailand and L. phuketensis from sout
hern Thailand. Liphistius thaleban Schwendinger is recorded from a new
locality in southern Thailand. Notes on natural history are given, zo
ogeography and relationships between the species examined are discusse
d and four superspecies are distinguished within the trang-species gro
up. (C) 1998 The Norwegian Academy of Science and Letters.