Remarkable diversity of the genus Endonura Cassagnau, 1979 (Collembola: Neanuridae: Neanurinae) in the Caucasus Author Smolis, Adrian Author Kuznetsova, Nataliya text Zootaxa 2016 4200 1 47 82 journal article 37755 10.11646/zootaxa.4200.1.2 cc51902d-0f32-4b23-b251-fa283d65f4af 1175-5326 177675 00D32877-F83A-4AE0-9139-894872F0EB72 Endonura dobrolyubovae sp. nov. Figs 25–40 , Tab. 4 Type material. Holotype : adult female on slide, Russia , Caucasus , Krasnodarsky Krai , Adygeya , Lagonaki Plateau ('Kamennoye More"), 1748 m alt., litter mountain coniferous forest ( Abies nordmanniana ), N44.08259 ˚, E40.00691 ˚, 5.VII.2014 , leg. M. Potapov , N. Kuznetsova , A. Kremenitsa ( MSPU ) . Paratypes : 2 males on slides, same data as holotype ( DIBEC and MSPU ) . Other material. Male on slide, Russia , Caucasus , Krasnodarsky Krai , up from Krasnaya Polyana , Aibga Range (ropeway Gornaya Karusel), northern slope, 2300 m alt., alpine zone, under Rhododendron caucasicum , N43.64175 ˚, E40.26222 ˚, 29.VI.2014 , leg. M.Potapov , N. Kuznetsova , A. Kremenitsa ; female and juvenile on slides, Russia , Caucasus , Krasnodarsky Krai , road between Tuapse and Khadyzhensk , surroundings of Gothski pass, about 300 m alt., litter from beech forest ( Fagus orientalis ) on a slope, N44.26951 ˚, E39.27032 ˚, 7.VI.2013 , leg. M. Potapov , A. Kremenitsa ; female on slide, Russia , Caucasus , Krasnodarsky Krai , up from Krasnaya Polyana , Achishkho Range , road to Khmelevskiye Lakes , beech forest, decaying bark on lying tree, N43.70180 ˚, E 40.23352 ˚, 30.VI.2014 , leg. M. Potapov , N. Kuznetsova , A. Kremenitsa ; female on slide, Russia , Caucasus , Krasnodarsky Krai , up from Krasnaya Polyana , eastern spurs of Achishkho Range , Khmelevskiye Lakes , observation deck “ Far ”, under Rhododendron caucasicum , 1913 m alt., N43.72683 ˚, E40.17008 ˚, 30.VI.2014 , leg. M. Potapov , N. Kuznetsova , A. Kremenitsa ; (slides housed in MSPU and DIBEC ). Etymology. The new species is dedicated to our colleague Tatiana Dobrolyubova who has made a contribution to the study of Collembola of Caucasus. Diagnosis. Habitus typical of the genus Endonura . Dorsal tubercles present and well developed. 2+2 eyes darkly pigmented. Buccal cone notably short, labrum nonogival. Head with chaetae A, B, O, C, D, F and G. Chaetae E absent. Tubercles Cl and Af separate. Tubercles Dl and (L+So) on head with 5 and 8 chaetae respectively. Tubercles Di and De on th. I not fused. Tubercles De on th. II and III with 3 and 4 chaetae respectively. Tubercles L on abd. III and IV with 4 and 7 chaetae respectively. Abd. IV and V with 8 and 3 tubercles respectively. “Male ventral organ” present. Claw with inner tooth. Tibiotarsi with chaetae B4 and B5 relatively short. Description . Habitus typical of the genus. Body length (without antennae): 1.25 (juvenile)– 2.48 mm ( holotype : 1.65 mm ). Colour of the body bluish grey. 2+2 medium dark pigmented eyes ( Fig. 27 ). TABLE 4. Chaetotaxy of Endonura dobrolyubovae sp. nov. : a) Cephalic chaetotaxy–dorsal side.
Tubercle Number of chaetae Types of chaetae Names of chaetae
Cl 4 Ml Mc F G
Af 8 Ml Mc Mcc B A C, D
Oc 3 Ml mi Ocm, Ocp Oca
Di 2 Ml Mcc Di1 Di2
De 2 Ml Mcc De1 De2
Dl 5 Ml Mcc mi Dl1, Dl5 Dl4 Dl2, Dl6
(L+So) 8 Ml Mcc me L1, L4, So1 L2 So3–6
b) Cephalic chaetotaxy–ventral side.
Group Number of chaetae
Vi 6
Vea 4
Vem 3
Vep 4
labium 11, 0x
c) Chaetotaxy of antennae.
Segment, Group Number of chaetae Segment, Group Number of chaetae adult
I 7 IV or, 8 S, i, 12 mou, 6 brs, 2 iv
II 12
III ve 5 sensilla AO III 5 ap 8 bs, 5 miA
vc 4 ca 2 bs, 3 miA
vi 4 cm 3 bs, 1 miA
d 5 cp 8 miA, 1 brs
d) Postcephalic chaetotaxy. Terga Legs Di De Dl L Scx2 Cx Tr Fe T th. I 1 2 1 - 0 3 6 1 3 1 9 th. II 3 2+s 3+s+ms 3 2 7 6 12 19 th. III 3 3+s 3+s 3 2 8 6 1 1 1 8 Sterna abd. I 2 3+s 2 3 VT: 4 abd. II 2 3+s 2 3 Ve: 4–5; chaeta Ve 1 present abd. III 2 3+s 2 4 Vel:5; Fu: 6–7 me, 0 mi abd. IV 2 2+s 3 7 Vel: 4; Vec: 2; Vei: 2; Vl: 4 abd. V (3+3) 7+s Ag: 3; Vl: 1 abd. VI 7 Ve: 14; An: 2mi Types of dorsal ordinary chaetae. Macrochaetae Ml relatively thin, long, straight or slightly arc–like, narrowly sheathed, feebly serrated, apically rounded or rarely pointed ( Figs 27, 31 , 38, 39 ); macrochaetae Mc and Mcc thin, straight, apically rounded or pointed; mesochaetae and microchaetae short, thin and pointed. Head. Buccal cone notably short ( Fig. 25 ). Labrum rounded, with ventral sclerifications nonogival as in Fig. 26 . Labrum chaetotaxy 4/2, 4. Labium as Fig. 25 . Maxilla styliform ( Fig. 32 ), mandible thin with two basal and two apical teeth ( Fig. 33 ). Chaetotaxy of antennae as in Figs 28–30 and Tab. 4 c. Apical vesicle distinct trilobed ( Fig. 29 ). S-chaetae of ant. IV of medium length and thickness. Chaetotaxy of head as in Tab. 4 a, b, and Figs 25, 27 . Chaetae D free. Tubercle Af on head longer than tubercles Oc. Chaeta Ocp longer than A ( Fig. 27 ). Tubercle Dl with 5 chaetae, chaeta Dl3 absent. Tubercle (L+So) with 8 chaetae, chaetae So3 and L3 absent ( Fig. 27 ). Elementary tubercle BE present. Chaeta A shorter than B. Thorax, abdomen, legs. Body s-chaetae fine and smooth, distinctly shorter than nearby macrochaetae ( Figs 31 , 39 ). Chaetotaxy of thorax and abdomen as in Tab. 4 d and in Figs 27, 31 , 34, 39 . Tubercles Di on th. I not differentiated ( Fig. 31 ). Chaetae De2 on th. II–III and De3 on th. III free. Chaetae De3 on abd. I–III free ( Fig.31 ). FIGURES 25–33 . Endonura dobrolyubovae sp. nov. : 25, chaetotaxy of labium and group Vi; 26, ventral sclerifications of labrum; 27, dorsal chaetotaxy of head and th. I; 28, dorsal chaetotaxy of ant. III–IV; 29, apical bulb; 30, ventral chaetotaxy of ant. III–IV; 31, dorsal chaetotaxy of th. II–III and abd. I; 32, maxilla; 33, mandible. The line of chaetae De1-chaeta s parallel to the dorsomedian line on abd. I–III. Furca rudimentary without microchaetae. Male with thick and forked chaetae (“male ventral organ”) on anal plates (abd. VI) and in groups: Ag (abd. V), Ve and Vl (abd. IV), Fu and Ve (abd. III, Figs 34, 37 ). Tubercles Di on abd. V fused, with chaetae Di2 as Mc and Di3 as mi ( Fig. 39 ). Chaetae Vl on abd. V present. Cryptopygy slightly developed. Chaetotaxy of legs as in Fig. 35 and Tab. 4 d. Claw with distinct inner tooth ( Figs 35, 36 ).
Remarks . E . dobrolyubovae sp. nov. is similar to E . persica Smolis et al ., 2016 , by its short buccal cone and non ogival labrum, the same number of lateral chaetae Dl and (L+So) on head, the absence of chaeta O on head, the presence of the same free chaetae on dorsal side of th. and abd., and presence of toothed claws (Smolis et al . 2016). However, they are different in the length of chaeta Ocp (in dobrolyubovae distinctly longer than chaeta A, in persica slightly shorter than A), the presence/absence of elementary tubercles BE on head (in dobrolyubovae present, in persica absent), the presence/absence of chaetae E on head (in dobrolyubovae absent, in persica present) and the presence/absence of “male ventral organ” (in dobrolyubovae present, in persica absent). Ecological note. The species was collected both in litter of different type of mountain forests ( Fig. 40 ), and in alpine zone under rhododendron’s shrubs.