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Distribution. S European Russia, S in Muridae

Distribution. S European Russia, S Kazakhstan, Uzbekistan, Turkmenistan, Kyrgyzstan, Tajikistan, NE Iran, N Afghanistan, NW & NC China (Xinjiang, Gansu, Qinghai, Inner Mongolia [= Nei Mongol], Ningxia, N Shaanxi, N Shanxi, and NW Hebei), and S Mongolia.

FIGURES 45–46 in Review of the genus Schizoturanius Verhoeff, 1931, with the description of a new species from the Altais, Asian Russia (Diplopoda: Polydesmida: Polydesmidae)

FIGURES 45–46. Schizoturanius krugovae sp. nov., male paratype (ASU). 45 & 46. Left gonopod, mesal and lateral views, respectively. Abbreviations: en, gonopod endomere; ep, external endomere process; ex, gonopod exomere; oip, oval inner plate; pu, pulvillus; sch, seminal chamber; sip, subtriangular inner plate. Scales: 500 μm.

FIGURES 10–21 in Review of the genus Schizoturanius Verhoeff, 1931, with the description of a new species from the Altais, Asian Russia (Diplopoda: Polydesmida: Polydesmidae)

FIGURES 10–21. Schizoturanius krugovae sp. nov., male paratypes (ASU). 10 & 13. Front body part, dorsal and lateral views, respectively. 11, 14 & 17. Mid-body part, dorsal, lateral and ventral views, respectively. 12, 15 & 18. Rear body part, dorsal, lateral and ventral views, respectively. 16. Segment 2, dorsal view. 19. Margin of prozonite and metazonite between rings 3 and 4, lateral view. 20 & 21. Distal part of epiproct, lateral and ventral views, respectively. Abbreviations: mz, metazona; pz, prozona; sp, spinneret; ss, serrate spikes; arrows show details indicated in text. Scales: 50 μm (Fig. 19), 100 μm (Figs 20, 21), 400 μm (Fig. 16), 500 μm (Figs 12, 14, 15, 17, 18), 1 mm (Figs 10, 11, 13).

FIGURES 3–9 in Review of the genus Schizoturanius Verhoeff, 1931, with the description of a new species from the Altais, Asian Russia (Diplopoda: Polydesmida: Polydesmidae)

FIGURES 3–9. Schizoturanius krugovae sp. nov., male paratypes (ASU) (Figs 3, 5–9) & female paratype (ASU) (Fig. 4). 3. Antenna; 4. Terminal disc of antenna. 5. Distal part of antenna. 6 & 7. Mandibular gnathal lobe, front and lateral views, respectively. 8. Gnathochilarium. 9. Head and collum, dorsal view. Abbreviations: a1–a7, antennomeres 1–7; af, anterior fringe; col, collum; et, external tooth; ia, intermediate area; it, internal tooth; ll, lamella lingualis; mp, molar plate; pl, pectinate lamellae; sb, sensilla basiconica; sbs, sensilla basiconica spiniformia; sc, sensory cone; st, stipes; td, terminal disc; arrow shows pores on terminal disc. Scales: 100 μm (Figs 5–7), 200 μm (Fig. 4), 250 μm (Fig. 3), 400 μm (Fig. 8), 500 μm (Fig. 9).

FIGURES 1–2. 1 in Review of the genus Schizoturanius Verhoeff, 1931, with the description of a new species from the Altais, Asian Russia (Diplopoda: Polydesmida: Polydesmidae)

FIGURES 1–2. 1. Schizoturanius krugovae sp. nov., male paratype, habitus (ZMUM Rd 4672). 2. Habitat of a male paratype ZMUM Rd 4672 (Betula pendula and Larix sibirica forest with bushes). Scale: 1 cm (Fig. 2 courtesy of T.M. Krugova).

FIGURES 33–44 in Review of the genus Schizoturanius Verhoeff, 1931, with the description of a new species from the Altais, Asian Russia (Diplopoda: Polydesmida: Polydesmidae)

FIGURES 33–44. Schizoturanius krugovae sp. nov., male paratypes (ASU) (Figs 33–41) & female paratype (Figs 42–44). 33. Segment 7, caudal view (legs 9 omitted). 34. Sternum 9, caudal view (legs 9 omitted). 35. Distal part of right gonopod, caudal view. 36. Segment 7 with gonopods, ventral view. 37 & 38. Right gonopod, mesal and lateral views, respectively. 39. External process of right gonopod endomere, caudal view. 40. Tip of right gonopod endomere, mesal view. 41. Pulvillus of right gonopod, lateral view. 42. Segment 3, ventral view (leg 2 almost omitted). 43 & 44. Vulva, front and lateral views, respectively. Abbreviations: bu, bursa of vulva; co, mesal conical coxal outgrowth; cp, conical projection; cr, small crest; cx2 & cx9, coxae 2 and coxae 9; do, digitiform coxal outgrowth; en, gonopod endomere; ep, external endomere process; er, epigynal ridge; ex, gonopod exomere; msp, minute spinous process; op, operculum of vulva; pu, pulvillus; ro, rounded external coxal outgrowth; sip, subtriangular inner plate; arrows show details indicated in text. Scales: 30 μm (Fig. 40), 50 μm (Figs 39, 41), 100 μm (Figs 34, 35), 200 μm (Fig. 43), 300 μm (Figs 36, 44), 400 μm (Figs 37, 38, 42), 500 μm (Fig. 33).

FIGURES 22–32 in Review of the genus Schizoturanius Verhoeff, 1931, with the description of a new species from the Altais, Asian Russia (Diplopoda: Polydesmida: Polydesmidae)

FIGURES 22–32. Schizoturanius krugovae sp. nov., male paratypes (ASU) (Figs 22 & 23, 25–32) & female paratype (ASU) (Fig. 24). 22. Leg-pair 1, caudal view. 23. Terminal part of right tarsus 1, caudal view. 24. Leg-pair 1, caudal view. 25. Ring 3, caudal view. 26. Terminal part of right tarsus 2, front view. 27. Coxa of left leg 2, ventral view. 28 & 30. Segment 6, caudal and ventral views, respectively. 29 & 31. Sternum 7, caudal and ventral views, respectively. 32. Segment 7, ventral view (gonopods dissected, legs 9 removed). Abbreviations: ac, accessory claw; c, claw; cx2, coxa 2; gp, gonapophysis. Scales: 50 μm (Figs 23, 26), 100 μm (Fig. 27), 200 μm (Fig. 29), 300 μm (Fig. 31), 400 μm (Figs 22, 24), 500 μm (Figs 25, 30, 32), 1 mm (Fig. 28).

MAP 2 in Review of the genus Schizoturanius Verhoeff, 1931, with the description of a new species from the Altais, Asian Russia (Diplopoda: Polydesmida: Polydesmidae)

MAP 2. Distribution of Schizoturanius krugovae sp. nov. (red circle) within a strictly protected area and a buffer zone of the Tigirek State Nature Reserve (marked in green and yellow, respectively) and its immediate adjacent areas. Abbreviations: CN, China; KZ, Kazakhstan; MN, Mongolia.

MAP 1 in Review of the genus Schizoturanius Verhoeff, 1931, with the description of a new species from the Altais, Asian Russia (Diplopoda: Polydesmida: Polydesmidae)

MAP 1. Distributions of Schizoturanius species (circles): clavatipes (dark blue), dmitriewi (green), dshungaricus (light blue), kitabensis (violet), krugovae sp. nov. (red), levis (brown), montivagus (pink), strongylosomoides (orange), tabescens (yellow). Abbreviations: KG, Kyrgyzstan; UZ, Uzbekistan.

FIGURES 2–5 in Record of two rare taxa from Synura genus (Chrysophyceae) with a description of a new species (Synura tiksiensis sp. nov.) near the arctic settlement of Tiksi, Yakutia, Russia

FIGURES 2–5. Body scales of two rare Synura species Figures 2–3 (TEM): Synura obesa. Scales are almost circular, a broad median keel with a small foramen pore is seen. Arrows show ridges which end with a short and narrow keel tip. There are no pores on the keel tip. Figures 4 (TEM)– 5(SEM): S. petersenii f. taymyrensis. Scale bars: 1 μm.

FIGURES 6–14 in Record of two rare taxa from Synura genus (Chrysophyceae) with a description of a new species (Synura tiksiensis sp. nov.) near the arctic settlement of Tiksi, Yakutia, Russia

FIGURES 6–14. Scales of Synura tiksiensis sp. nov. from the type locality. Figures 6–7 (TEM): Rear scales. Figures 8–9 (TEM): Body scales with keel ending with an acute tip, large pores are present; Figures 10–12 (TEM) and Figures 13–14 (SEM): Apical scales. Rounded struts reach the proximal rim of scale, connected by a parallel rib in some places. Apical scales with a keel that ends with an acute or rounded tip. Scale bars: 1 μm.

FIGURE 13 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 13. Variability of some prodorsal structures in individuals of Oromurcia bicuspidata from Kolguev Island, Barents Sea. A–I—anterior part of prodorsum, setae shown partially; J—variability of rostrum; K—variability of bothridial seta. Scale bar 50 μm.

FIGURE 12 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 12. Map on distribution of Oromurcia spp. compiled from published data (Thor 1930; Willmann 1939; Hammer 1944, 1946; Dalenius 1960; Karppinen & Krivolutsky 1982; Golosova et al. 1983; Karppinen et al. 1987; Seniczak & Solhøy 1987; Karppinen et al. 1992; Starý 1993a, b, 1996, 2005, 2006a, b; Luxton 1996; Gjelstrup & Solhøy 1994; Krivolutsky et al. 1995; Skubała & Gulvik 2005; Seniczak et al. 2006; Gabris et al. 2008; Mahunka & Mahunka-Rapp 2008; Hågvar et al. 2009; Melamud 2009; Heggen 2010; Shtanchaeva & Subías 2010; Mahunka et al. 2013; Makarova & Behan-Pelletier 2015; Weigmann et al. 2015; Schatz 2020), and four original finds—two from Greenland as well as records from Kola Peninsula and Kolguev Island. Red circles—Oromurcia bicuspidata, blue circles—Oromurcia sudetica, asterisk—Oromurcia magadanensis sp. nov.

FIGURE 11 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 11. Collecting place of Oromurcia magadanensis sp. nov.: A—landscape of the Ola Plateau, Magadan Region, 60°39' N, 151°16' E; B—snowbed in the stream gully (the place of collection, 1023 m a.s.l., is indicated by an yellow arrow); C, D—rocky slope of a snowbed with vegetation patches dominated by Oxyria digyna and Artemisia kruhsiana (C) or Ranunculus pygmaeus and Sanionia uncinata (D).

FIGURE 10 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 10. Oromurcia magadanensis sp. nov., SEM micrographs of slightly deformed deutonymph (A–C) and microscope images of dissected juvenile instars (D–H): A, B—dorsal view; C—lateral view; D—larva, dorsal view; E—tritonymph, basal part of prodorsum and anterior part of gastronotum (pigmented, small, round pit (? rudimentary porose area Aa) is indicated by an arrow), dorsal view; F—tritonymph, some setae on gastronotic macrosclerite, dorsal view; G—protonymph, anterior part of body, ventral view; H —protonymph, posterior part of body, ventral view.

FIGURE 8 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 8. Oromurcia magadanensis sp. nov., tritonymph: A—dorsal view; B—ventral view (legs and anterior part of body not shown). Scale bar 100 μm.

FIGURE 9 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 9. Oromurcia magadanensis sp. nov., larva: A—subcapitulum, ventral view; B—palp, right, antiaxial view; C—chelicera, left, paraxial view; D—leg I, left, paraxial view; E—leg II, left, paraxial; F—leg III, left, antiaxial view. Scale bars 10 μm (A–C), 20 μm (D–F).

FIGURE 7 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 7. Oromurcia magadanensis sp. nov., ventral side of juvenile instars (legs and anterior part of body not shown): A—larva; B—protonymph; C—deutonymph. Scale bars 50 μm.

FIGURE 6 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 6. Oromurcia magadanensis sp. nov., juvenile instars: A—larva, lateral view; B—tritonymph, lateral view. Scale bar 50 μm. Scale bars 50 μm (A), 100 μm (B).

FIGURE 3 in Description of Oromurcia magadanensis sp. nov. (Acari, Oribatida, Ceratozetidae) from Russia, with remarks on biogeography of the genus Oromurcia Thor, 1930

FIGURE 3. Oromurcia magadanensis sp. nov., adult, SEM micrographs: A—dorsal view; B—ventral view; C—ventrolateral view; D—dorsoanterior view; E—posterior view; F—notogastral tuberculate microsculpturing.