The 4 species Thalassaphorura encarpata (Denis, 1931), Thalassaphorura lifouensis (Thibaud & Weiner, 1997), Thalassaphorura biquaternata sp. nov., and Allonychiurus shandongensis sp. nov. were recorded from Shandong Province, China. Thalassaphorura biquaternata sp. nov. is peculiar in the genus by having more posterior pseudocelli on the head, fewer pseudocelli on the prothoracic tergum, papillae and guard chaetae on the antennal segment III sensory organ, guard chaetae on labial papilla E, and chaetae in the distal row of tibiotarsi, and by the absence of chaeta d0 dorsally on the head. Allonychiurus shandongensis sp. nov. belongs to the “volinensis-group” by having the small body size and smooth sensory clubs on the antennal segment III sensory organ, but with 5 papillae on the antennal segment III sensory organ. It is similar to the species A. songi Sun & Wu, 2012, and it can be recognized easily by the number of p-chaetae between 2 inner posterior pseudocelli on the head, the pseudocellus on abdominal segment IV sternum, and the number of papillae on the antennal segment III sensory organ.