Redescription of Folsomia loftyensis Womersley with notes on the sensillary arrangement of the genital segment in the genus (Collembola: Isotomidae)

Isotomidae of Japan and the Asiatic part of Russia. I. Folsomia 'inoculata' group

The paper considers blind species of the genus Folsomia having two pairs of macrosetae on both meso- and metathorax and united in so-called 'inoculata' group, which is given a new, more laconic definition. Morphological characters important in the group's taxonomy are discussed and a further division into four subgroups is proposed. Eight new species, i.e., F. amurica Potapov & Kuznetsova, sp. n., F. breviseta Potapov & Kuznetsova, sp. n., F. calcarea Potapov, sp. n., F. imparis Potapov & Hasegawa, sp. n., F. laconica Potapov & Kuznetsova, sp. n., F. tertia Potapov, sp. n., F. trisensilla Potapov, sp. n., and F. tubulata Potapov & Babenko, sp. n., are described. F. hidakana Uchida & Tamura and F. inoculata Stach are redescribed basing on new material, for the latter species the Stach's individuals were also examined. A key to species of the group is given.

Taxonomy of the Cryptopygus complex. II. Affinity of austral Cryptopygus s.s. and Folsomia, with the description of two new Folsomia species (Collembola, Isotomidae)

Folsomiaminoraesp. n. and Folsomiaaustralicasp. n. are described from New Zealand and Australia, respectively. Their possible affinity to two different groups of Cryptopygussensu stricto is discussed. Attention is paid to the variability of sensillary patterns of the genital segment in Cryptopygus: mainly, all s-chaetae are subequal, but in more advanced forms the dorsal triplet, lateral duplet or either of them become macrochaeta-like in length. Cryptopygusulrikeae (= Folsomiaulrikeae Najt & Thibaud, 1987), comb. n. is given a new generic position.