New Collembolan species of the genera Sensiphorura Rusek, 1976 (Pachytullbergiidae) and Cephalachorutes Bedos & Deharveng, 1991 (Neanuridae) from Southern Vietnam

Sensiphorura tiunovi n. sp., S. anichkini n. sp. and Cephalachorutes judithae n. sp. are described from monsoon tropical forests of Cat Tien National Park of Southern Vietnam. The first species differs from congeners (S. marshalli Rusek, 1976, S. oligoseta Bu, Potapov & Gao 2013, and Sensiphorura anichkini n. sp.) by the absence of microsensillum on metathorax. Both new species of Sensiphorura Rusek, 1976 differ from known species by details in dorsal chaetom. Cephalachorutes judithae n. sp. is characterized by the following combination of characters: absence of eyes, large S3 and S4 sensilla on antennal organ III and five chaetae on dens.