Two new pseudoscorpion species (Pseudoscorpiones, Chthoniidae, Cheiridiidae) from the Tonga Islands, Polynesia, with a redescription of the genus Nesocheiridium

The genera Chamberlin, 1929 and Beier, 1957 are recorded from the Tonga Islands, Polynesia, for the first time. is described from the island of Eua. is described from the island of Onevai. This is the first discovery of a representative of the genus in more than 60 years. The holotype of the type species, Beier, 1957, is redescribed, allowing a better understanding of this poorly known genus. The genus is diagnosed by the following combination of characters: integument coarsely granulate, dorsally granulo-reticulate; vestitural setae either relatively long, with a leaf-like outline, or arcuate with a small spine; cucullus short; only 10 abdominal tergites visible in dorsal view; cheliceral rallum of four blades; venom apparatus present in both chelal fingers; fixed chelal finger with granulate swelling mesally and seven trichobothria; trichobothria and located distad of granulate swelling; and situated close together at the base of the finger; moveable chelal finger with two trichobothria.