Genus Liphistius Schiödte, 1849

Type species.

Liphistius desultor Schiödte, 1849 from Malaysia.

Diagnosis.

Liphistius can be distinguished from the other seven genera by having the male palps bearing tibial apophysis (TiA) (Figs 3 A, 5 C, 7 C, 9 A), clavate trichobothria on the dorsal side of cymbia and leg tarsi, and vulvae possessing median receptacular cluster (RC) and sclerotized poreplate (PPl) (Figs 4, 6, 8, 10).

Distribution.

China (Yunnan Province), Indonesia (Sumatra), Laos, Myanmar, Peninsular Malaysia, and Thailand.

Comments on Liphistius in Myanmar.

Eleven named Liphistius species in Myanmar were grouped into three species-groups: the birmanicus - group, comprising nine valid species; the bristowei - group, consisting of one known species; and the trang - group, also containing one known species (Schwendinger 1990; Schwendinger et al. 2022; Sivayyapram et al. 2024). All named Liphistius species of the birmanicus - group were described based on both sexes, except for L. hpruso Aung, Xu, Lwin, Sang, Yu, Liu, Liu & Li, 2019, which is only known from females. In this study, four new Liphistius species belonging to the birmanicus - group are described, identified according to the morphology of their copulatory organs in both sexes.

Composition of the birmanicus - group:

L. birmanicus, L. cupreus Schwendinger & Huber, 2022, L. ferox Schwendinger & Huber, 2022, L. hpruso, L. lahu Schwendinger, 1998, L. lordae Platnick & Sedgwick, 1984, L. metopiae Schwendinger, 2022, L. nabang Yu, Zhang & Zhang, 2021, L. pinlaung Aung, Xu, Lwin, Sang, Yu, Liu, Liu & Li, 2019, L. platnicki Schwendinger & Huber, 2022, L. pyinoolwin Xu, Yu, Aung, Yu, Liu, Lwin, Sang & Li, 2021, L. tung Schwendinger, 2022 .