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Two new species of the genus Hymenaphorura are described from the Maoershan National Forest Park, northeast China: H. maoerensis sp. nov. and H. minuta sp. nov. The former seems to be especially similar to H. granulata, H. sensitiva, H. superba and H. nearctica, but differs by a combination of the following characters: 1 submedial chaeta on Th. I tergum, second external papilla in AIIIO simple, inner tooth on unguis absent, chaeta C3 of proximal whorl of tibiotarsi absent, chaetae p2 and p3 on Abd. I—III of roughly subequal in length while S-chaeta weakly developed. H. minuta sp. nov. belongs to a group of species showing 9 chaetae in the distal whorl of the tibiotarsi, but it can easily be distinguished from the other members of the group by the dorsal pso formula.
The diagnosis of Bionychiurus Pomorski, 1996 is updated and a identification key to the world species of the genus is given. A new species, B. changbaiensis sp. nov., as the first Chinese species of the genus, is described from Northeast China. The new species is diagnosed by pso formulae as 32/133/33343 dorsally and 11/000/01120 ventrally, psx present on subcoxa 1 of legs I, II and III as 1,1 and 1 respectively, PAO composed with 22-26 granulated vesicles, Th. I with 9-10+9-10 chaetae dorsally, chaetae on subcoxa 1 of legs I-III as 5/6/6, unguiculus 0.8 times as long as inner edge of unguis and anal spines as long as inner edge of hind unguis.
Two new species of Sensillonychiurus, are described from Changbai Mountains, northeastern China: S. reducta sp. nov. and S. pseudoreducta sp. nov. Both these species are very similar to each other, sharing such characters as a reduced unguiculus, 4 papillae and 3 guard chaetae on the Ant. III sensory organ, the AC type of labium, 5+5 chaetae on Th. I tergum, 9 distal tibiotarsal chaetae, as well as the absence of anal spines. Yet they can be differentiated by the presence vs. absence of pso on Th. I tergum, of chaetae p2 on Th. II tergum, and of chaetae b2 on the upper anal valve, respectively, as well as by the number of dorsal S-chaetae, of sublobal hair on the maxillary palp, of p-row chaetae on Abd. IV tergum.
The new species Agrapkorura xuae sp. nov. is described from continental Ecuador, the first onychiurid species record in this region. The new species is most similar to A. gambiarius (Murphy, 1965) from West Africa, but they can be separated easily by the number and length of p-chaetae between two inner posterior pso on the head, the number of chaetae on Th. I tergum, the presence of the male ventral organ and the ratio of the empodial appendage/unguis. A key to the world known species is provided. The list of all known species from continental Ecuador is presented.
Protaphorura ionescui sp. nov. is described from Romania. This species is closest to Protaphorura glebata (Gisin, 1952) which is redescribed, and P. fimata (Gisin, 1952). A key for Protaphorura with dorsal pseudocellar formula like 33/022/33333 is given.
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