The millipede genus Leucogeorgia Verhoeff, 1930 in the Caucasus, with descriptions of eleven new species, erection of a new monotypic genus and notes on the tribe Leucogeorgiini (Diplopoda: Julida: Julidae) Author Antić, Dragan Ž. A3774DC0-0710-4F91-8F36-F18620D694E0 University of Belgrade - Faculty of Biology, Institute of Zoology, Studentski Trg 16, 11000 Belgrade, Serbia. Serbian Biospeleological Society, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia. Department of Soil Zoology, Senckenberg Museum of Natural History Görlitz, Am Museum 1, 02826 Görlitz, Germany. Thüringer Höhlenverein e. V., Johann-Sebastian-Bach-Str. 16 a, 98529 Suhl, Germany. dragan.antic@bio.bg.ac.rs Author Reip, Hans S. 2FEC1E52-27EF-4393-AB77-D21C66081CD5 reip@myriapoden-info.de text European Journal of Taxonomy 2020 2020-09-07 713 1 106 journal article 20988 10.5852/ejt.2020.713 1d5fdead-d612-4c66-b482-4f051f990351 4020752 A6CB58F5-1ECC-47F0-AA07-798844AF80A7 Leucogeorgia borealis sp. nov. urn:lsid:zoobank.org:act: D8CFFCD0-8D33-42A0-B7FD-E8FDE92E99E2 Figs 16–18 , 56–57 Diagnosis This species belongs to the group of Leucogeorgia spp. without modified mouthparts and with teeth on the mesomeral claw (vs absent in L. golovatchi sp. nov. , L. lobata sp. nov. and L. prometheus sp. nov. ). Leucogeorgia borealis sp. nov. differs from L. abchasica , L. satunini and L. gioi sp. nov. by having a stout mesomeral claw (vs elongate and slender in L. abchasica , L. satunini and L. gioi sp. nov ). Leucogeorgia borealis sp. nov. differs from L. oculata sp. nov. by having a strongly serrate mesomeral lamella without a posterior rise (vs lamella non-serrate and with a posterior rise in L. oculata sp. nov. ), and in the absence both of pigmentation and ommatidia, and the presence of metazonal setae (vs a pigmented body, ommatidia present and metazonal setae absent in L. oculata sp. nov. ). Etymology From the Latin ʻ boreas ʼ (= ʻnorthʼ), reflecting its having the northernmost species in the genus.Adjective. Fig. 16. Leucogeorgia borealis sp. nov. , types from Fanagoriyskaya Cave (ZMUM). A . Paratype ♀, habitus, lateral view. B . Paratype ♀, anterior part of body, lateral view. C . Paratype ♂, posterior part of body, lateral view. D . Holotype ♂, body ring 7, lateral view. E . Paratype ♀, midbody rings, lateral view. Arrow indicated metazonal seta. Scale bars: 1 mm. Type material Holotype RUSSIA • ♂ ; Krasnodar Province , near Goryachiy Klyuch, NW karst area of Greater Caucasus , Fanagoriyskaya (= Bolshaya Fanagoriyskaya, = Psekupskaya) Cave ; 44.47° N , 38.98° E ; 3 Nov. 1943 ; J. Birstein leg.; ZMUM . Paratypes RUSSIA • 1 ♂ , 1 ♀ , 2 juvs ; same collection data as for holotype but 8 Jul. 1961 ; S.I. Ljovuschkin leg.; ZMUM • 1 juv. ; same collection data as for holotype but 19 May 1983 ; S.I. Golovatch leg.; ZMUM • 1 ♀ ; same collection data as for holotype but 20 Sep. 1968 ; ZMUM . Description SIZE AND NUMBER OF BODY RINGS. Holotype male 24 mm long, vertical diameter of largest body ring 1.5 mm , body with 43 podous rings + 1 apodous ring + telson. Paratype male 28 mm long, vertical diameter of largest body ring 1.55 mm , body with 49 podous rings + 2 apodous rings + telson. Paratype females 21 and 24 mm long, vertical diameter of largest body ring 1.4–1.5 mm , body with 37 or 44 podous rings + 1 apodous ring + telson. COLOUR ( Fig. 16 ). Yellowish white in alcohol. HEAD ( Figs 16B , 17C ). Without ommatidia. Frontal setae absent. Labrum with three labral teeth, four supralabral setae and 17 labral setae in paratype male. Gnathochilarium with a rhomboid promentum; lamellae linguales with 4+4 setae, stipites with 3+3 distolateral and 5+6 medial setae. Antennae 1.9 mm long in smaller paratype female, their length ca 140% of vertical diameter of largest body ring. Lengths of antennomeres I–VIII (in mm): 0.13 (I), 0.45 (II), 0.36 (III), 0.30 (IV), 0.40 (V), 0.18 (VI), 0.06 (VII) and 0.02 (VIII). Length/width ratio of antennomeres I–VII: 0.8 (I), 3 (II), 2.4 (III), 2 (IV), 2.7 (V), 1 (VI) and 0.5 (VII). Antennomeres V and VI each with a terminal corolla of large sensilla basiconica bacilliformia; antennomere VII with a terminal corolla of small sensilla basiconica bacilliformia. BODY RINGS ( Fig. 16E ). Entire metazonal area with longitudinal striations. Length of midbody setae ca 5% of vertical diameter of rings. TELSON ( Fig. 16C ). Epiproct with a short and blunt preanal process, covered with dorsal and lateral setae. Paraprocts rounded, setose. Hypoproct without any modifications. LEGS IN MALES. First pair of legs modified, hook-shaped ( Figs 17 A–B, 18D–E), with three complete podomeres; coxa with two setae; prefemur with four setae; femur, postfemur and tibiotarsus coalesced; femur with two setae; postfemur with one seta; tibiotarsus with a prominent distal lobe (tarsal remnant). Tip slightly tuberculated. Postfemoral and tibial ventral pads well developed on anterior legs, then gradually disappearing towards posterior legs. VENTRAL MARGIN OF MALE BODY RING 7 ( Fig. 16D ). Poorly developed, low, rounded in lateral view. PENES ( Fig. 18C ). In form of a short trapezoid, apically with two small subtriangular lobes. GONOPODS ( Figs 17D , 18 A–B). Promere (p) long and slender, with a flagellum (f); apical part spatulate, with denticulate margins; basal half with two developed ridges. Mesomere (m) with a well-developed, robust and denticulate mesomeral claw (mc); mesomeral lamella (ml) convex in central part, distal margin serrate, posterior part finely fimbriate. Opisthomere (o) bipartite. Anterior branch of o with a solenomere (s), with a medium-sized tip, and a well-developed and fimbriate velum (v). Posterior branch of o in form of a shield-like protective lamella (pl). Mesomere and opisthomere connected basally through an accessory membrane (am). Fig. 17. Leucogeorgia borealis sp. nov. , paratype ♂ from Fanagoriyskaya Cave (ZMUM). A . Leg-pair 1, anterior view. B . Right leg 1, lateral view. C . Head, ventral view. D . Left gonopods, mesal view. Abbreviations: am = accessory membrane; f = flagellum; m = mesomere; mc = mesomeral claw; ml = mesomeral lamella; o = opisthomere; p = promere; pl = protective lamella; s = solenomere; v = velum. Scale bars: A–B = 0.05 mm; C = 0.2 mm; D = 0.1 mm. Distribution Known only from its type locality ( Fig. 57 , blue triangle). Remarks This is the northwesternmost record of the entire genus.