The genus Pseudachorutes Tullberg, 1871 (Collembola, Neanuridae) in the Ukraine with descriptions of new species Author Kaprus’, Ighor J. Author Weiner, Wanda M. text Zootaxa 2009 2166 1 23 journal article 10.5281/zenodo.189101 ffd26a22-acd1-4b55-988c-9e07123362ac 1175-5326 189101 Pseudachorutes dubius Krausbauer, 1898 Redescription . Body length without antennae 1.50–2.85 mm. Colour dark bluish-grey (on slide), ocular plate bluish-black. Tegumental granulation coarse, dense and uniform. Antennae are long as the head approximately. Ant. I with 7 setae, Ant. II with 11 setae and Ant. III with 19 ordinary setae. Ant. III and IV fused dorsally, ventral separation well marked. Sensory organ of Ant. III consisting of: two small, oval sensilla, two subcylindrical guard sensilla (ventral sensillum as long as dorsal one) and two guard setae between them; ventral microsensillum present. Ant. IV with about forty five ordinary setae, 9–10 modified setae in ventro-apical part and 6 thin subcylindrical sensilla; dorsoexternal microsensillum and subapical organite present; apical vesicle divided on three lobes. PAO oval with 14–20 vesicles, 1.35–1.60 times larger than ocellus B. Eyes 8+8. Buccal cone short. Mandible fork-like, with two small teeth near apex. Styliform maxilla with two lamellae, one of them with tiny apical hook. Labral formula: 4/2,3,4. Labium with 12+12 ordinary setae, no apical organite x, but an internal stylet visible near apex. Perilabial area with 4+4 subequal setae. Dorsal chaetotaxy with short setae and with longer sensory setae s. Formula per half tergum as: 022/ 11111. Microsensilla on Th. II present. Head with unpaired seta d1 and without a0 seta. Th. I with 4+4 setae. Th. II and III with 10+10 setae (a2, a5 and m4 setae absent). Abd. I–III with 8+8 setae (a6, a3 setae absent and m4 setae present), Abd. IV with 11+11 setae (m4, m6 setae present), seta s = seta p5. Abd. V without a2 and with p2 setae, seta s = p3. Ventral chaetotaxy: thoracic sterna without setae, VT with 3+3 setae, Abds. I without setae, Abds. II with 3+3 setae, Abds. III with 6–7+6–7 setae. Dens with six setae. Mucro boat-shaped, with curved ventral edge and broad lateral lamella. Manubrium with 12–13+12-13 setae. Tenaculum with 3+3 teeth. Each anal valve with two setae hr. Tibiotarsi I, II and III with 18, 18 and 17 setae, respectively, setae M and B7 absent on tibiotarsus III. Femora I, II and III with 12, 12 and 11 setae, trochanters I, II and III with 6, 6 and 6 setae, coxae I, II and III with 3, 6 and 7 setae, subcoxae 2 of legs I, II and III with 0, 2 and 2 setae, subcoxae 1 of legs I, II and III with 1, 2 and 2 setae, respectively. Claw with a strong tooth near middle of inner edge and a pair of strong lateral teeth in basal part. Empodial appendage absent. Material examined. 2 females and 7 juveniles (on slides), Ukraine , Ivano-Frankivs’k district, Karpats’ky National Park, near Vorochta village, Chornohora ridge, Pozhyzhevska Mt., 1750 m alt., Duschekia viridis and Pinus mugo crooked forest, moss, 20.VIII.1993 , leg. I. Kaprus’; 1 female (on slide), Ukraine , Ivano- Frankivs’k district, near Mykulychyn village, Gorgany ridge, 700 m alt., Fagus and Abies forest, moss, 25.VI.1991 , leg. I. Kaprus’; 1 female (on slide), Ukraine , L’viv district, near Skole town, Skolivs’ki Beskydy ridge, 500 m alt., Fagus forest, leaf litter and soil, 7.IX.2004 , leg. V. Javornytsky; 1 male and 3 females (on slides), Ukraine , Chernivtsi district, near Perkalab village, Chyvchyny ridge, Chyvchyn Mt., 1000 m alt., Alnus forest, leaf litter, 2.VIII.1992 , leg. I. Kaprus’; 2 females (on slides), Ukraine , Zakarpattya district, near Julivtsi village, Julivs’ky Hills, Quercus and Carpinus forest, leaf litter, 6.IV.1989 , leg. I. Kaprus’; 2 males and 2 females (on slides), Ukraine , L’viv district, near Mykolaiv town, Quercus forest, leaf litter and soil, 7.X.1999 , leg. I. Kaprus’; male and 2 females (on slides), Ukraine , L’viv district, near Javoriv town, Roztochchya Hills, Pinus forest, leaf litter and soil, 7.VIII.2003 , leg. V. Javornytsky; 1 female (on slide), Ukraine , Volyn’ district, near Shats’k town, Pinus forest, leaf litter, 7.XII.1977 , leg. V. Melamud; 1 female (on slide), Ukraine , Zhytomyr town, Pinus-Quercus forest, leaf litter and soil, 5.II.2008 , leg. I. Kaprus’; male (on slide), Ukraine , Ternopil’ district, Grymajliv village, Medobory Reservation, Carpinus forest, soil, 20.VI.1994 , leg. I. Kaprus’; 1 female (on slide), Ukraine , Donetsk district, near Bohorodychne village, Quercus forest, 2.VIII.1997 , leg. I. Bondarenko. Biology. Pseudachorutes dubius has been collected in the forest habitats of Ukraine , besides the Crimean Peninsula. Bisexual forest species. Remarks. A recent morphological description of P. dubius was published by Fjellberg (1998) using material from Fennoscandia and Denmark . Morphological characters of the Ukrainian specimens fit this description. Pseudachorutes dubius is related to Pseudachorutes vitalii sp.nov. Differences between the two species are given in Table 1.