Endonura kremenitsai, Smolis, Adrian & Kuznetsova, Nataliya, 2016

Smolis, Adrian & Kuznetsova, Nataliya, 2016, Remarkable diversity of the genus Endonura Cassagnau, 1979 (Collembola: Neanuridae: Neanurinae) in the Caucasus, Zootaxa 4200 (1), pp. 47-82 : 73-77

Endonura kremenitsai sp. nov.

Figs 67–73 , Tab. 8

Type material. Holotype: adult female on slide, Russia, Caucasus , Krasnodarsky Krai, between Adler and Sochi, Khostinsky Department Reserve, 250 m alt., subtropical deciduous forest ( Taxus baccata , Buxus colchica ), litter under Taxus , N43.31729 ˚, E39.52353 ˚, 1.VII.2014, leg. M. Potapov, N. Kuznetsova, A. Kremenitsa ( MSPU) . Paratypes: 4 females, male and 2 juveniles on slides, same data as holotype ( MSPU and DIBEC) .

Other material. Male and 2 juveniles 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 ( MSPU) .

Etymology. The new species is dedicated to our colleague Alexander Kremenitsa who is studying Collembola of Caucasus.

Diagnosis. Habitus typical of the genus Endonura . Dorsal tubercles present and well developed. 2+2 pigmented eyes. Buccal cone long, labrum nonogival. Head with chaetae A, B, O, C, D, E, F and G. Tubercles Cl and Af separate. Tubercles Dl and (L+So) on head with 5 and 10 chaetae respectively. Tubercles Di and De on th. I 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. Claw without inner tooth. Tibiotarsi with chaetae B4 and B5 relatively long.

Description. Habitus typical of the genus. Body length (without antennae): 0.77 (juvenile)– 1.65 mm (holotype 1.23 mm). Colour of the body bluish grey. 2+2 large pigmented eyes ( Fig. 67 ).

Types of dorsal ordinary chaetae. Macrochaetae Ml relatively long, slightly thickened, almost cylindrical, straight or arc-like, narrowly sheathed, serrated, apically rounded ( Figs 67, 69, 71 ); macrochaetae Mc and Mcc thickened, straight or arc-like, serrated ( Fig. 67, 71 ), pointed or rounded at apex; mesochaetae and microchaetae short, thin, feebly serrated and pointed.

Head. Labrum nonogival, with ventral sclerifications as in Fig. 68 . Labrum chaetotaxy 4/2, 4. Labium as Fig. 68 . Maxilla styliform, mandible thin with two basal and two subapical teeth. Chaetotaxy of antennae as in Tab. 8 c. Apical vesicle distinct, trilobed. S-chaetae of ant. IV relatively long and thin. Chaetotaxy of head as in Tab. 8 a, b, and Fig. 67 . Chaeta D not connected with tubercle Cl. Tubercle Af on head longer than tubercles Oc. Elementary tubercles CD present. Chaeta A shorter than B.

Thorax, abdomen, legs. Body s-chaeta thin and smooth, distinctly shorter than nearby macrochaetae ( Figs 67, 71 ). Chaetotaxy of thorax and abdomen as in Tab. 8 d and in Figs 67, 69–72 . Tubercles Di on th. I differentiated and fused with tubercles De ( Fig. 67 ). Chaetae De3 on th. III and abd. I–III as Mcc. Chaetae De2 on th. II–III and De3 on th. III free. Chaetae De3 on abd. I–III free ( Fig. 71 ). The line of chaetae De1-chaeta s parallel to the dorsomedian line on abd I–III. Furca rudimentary without microchaetae ( Figs 70, 72 ). Tubercles Di on abd. V fused, with chaetae Di2 as Mc or Mcc, and chaetae Di3 as mi ( Fig. 71 ). 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), and Fu (abd. III, Fig. 72 ). Chaetae Vl on abd. V present. No cryptopygy. Chaetotaxy of legs as in Tab. 8 d. Tibiotarsi with chaetae B4 and B5 relatively long. Claw without inner tooth.

Remarks. Morphologically, E. kremenitsai sp. nov. resembles two other new species described herein, E. paracantabrica sp. nov. and E. diminutichaeta sp. nov. However, it can be easily distinguished from them by the following combination of characters: presence/absence of chaeta E on head (in paracantabrica absent, in others present), presence/absence of elementary tubercles BE on head (in diminutichaeta present, in others absent), number of chaetae Dl on head (in kremenitsai 5, in paracantabrica 6, in diminutichaeta 4-5), shape of labrum (ogival in diminutichaeta , nonogival in others), length of chaetae Di1 of abd. IV (in diminutichaeta notably short and several times shorter than chaetae Di1 of abd. V, in others short but only ca. twice shorter than chaetae Di1 of abd. V), and presence/absence of male ventral organ (in kremenitsai present, in others absent).

b) Cephalic chaetotaxy–ventral side.

c) Chaetotaxy of antennae.

d) Postcephalic chaetotaxy.

Terga Legs

Di De Dl L Scx2 Cx Tr Fe T th. I 3 1 - 0 3 6 1 3 1 9 th. II 3 2+s 3+s+ms 3 2 7 6 1 2 1 9 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: 5; chaeta Ve 1 present

abd. III 2 3+s 2 4 Vel: 5–6; Fu: 5–6 me, 0 mi

abd. IV 2 2+s 3 7 Vel: 4; Vec: 2; Vei: 2; Vl: 4

abd. V (3+3) 7–8+s Ag: 3; Vl: 1

abd. VI 7 Ve: 13-14; An: 2mi

Ecological note. The species was collected in litter of different type of forests, subtropical deciduous forest ( Fig. 73 ) and beech forest.

2, Northern Ossetia, Tseyskoye Canyon— ossetica ;

3–4, Krasnodarsky Krai, up from Krasnaya Polyana, Aibga Range–– paracantabrica (960 m alt.), aibgai (2300 m alt.), dobrolyubovae (2300 m alt.), diminutichaeta (2300 m alt.);

5–8, Krasnodarsky Krai, up from Krasnaya Polyana, Achishkho Range, 1913 m alt.–– dobrolyubovae , diminutichaeta , cryptopyga ;

9, Krasnodarsky Krai, between Adler and Sochi, Khostinsky Department Reserve–– kremenitsai ; 10, Krasnodarsky Krai, Adygeya, Lagonaki Plateau–– dobrolyubovae ;

11, Krasnodarsky Krai, surroundings of Gothski pass–– dobrolyubovae , kremenitsai ; 12, Krasnodarsky Krai, surroundings of settlement Ryazanskoe–– cryptopyga ; 13, Krasnodarsky Krai, village Semigorsky,–– diminutichaeta .

Figures

FIGURE 73. Subtropical deciduous forest in Khostinsky Department Reserve, type locality of Endonura kremenitsai sp. nov.

FIGURES 67 – 72. Endonura kremenitsai sp. nov.: 67, dorsal chaetotaxy of head and th. I – II (holotype); 68, chaetotaxy of labium and group Vi; 69, chaetotaxy of tubercle L of abd. IV; 70, furca rudimentary (adult female); 71, ventral chaetotaxy of abd. III – VI (adult male); 72, dorsal chaetotaxy of abd. III – VI.

Tables

TABLE 8. Chaetotaxy of Endonura kremenitsai sp. nov.: a) Cephalic chaetotaxy – dorsal side.

Tubercle	Number of chaetae	Types of chaetae	Names of chaetae
Cl	4	Ml Mc	F G
Af	11	Ml Mc Mc or Mcc	B A, C, O D, E
Oc	3	Ml Mc Mcc or mi	Ocm Ocp Oca
Di	2	Ml Mc	Di1 Di2
De	2	Ml Mc or Mcc	De1 De2
Dl	6	Ml Mc Mcc	Dl1, Dl5 Dl4 Dl2, Dl3, Dl6
(L+So)	10	Ml Mc Mcc me	L1, L4, So1 L2 L3,So2 So3–6