Endonura cryptopyga, 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 : 66-70

Endonura cryptopyga sp. nov.

Figs 49–56 , Tab. 6

Type material. Holotype: adult female on slide, Russia, Caucasus , Krasnodarsky Krai , up from Krasnaya Polyana, Achishkho Range (Khmelevskiye Lakes), 1913 m alt., southern slope, subalpine zone, mosses and silt on rocks, N43.72683 ˚, E40.17008 ˚, 30.VI.2014, leg. M. Potapov, N. Kuznetsova, A. Kremenitsa ( MSPU) .

Other material. 3 juveniles on slide, Russia, Caucasus, Krasnodarsky Krai , road between Belorechensk and Krasnodar, surroundings of settlement Ryazanskoe , forest shelter belt, N 44.97402 ˚, E 39.60708 ˚, 9.VI.2013, leg. M. Potapov, A. Kremenitsa, M. Furgoł, Т. Maulana .

Etymology. The species name refers to characteristic feature—cryptopygy.

Diagnosis. Habitus typical of the genus Endonura . Dorsal tubercles present and well developed. 2+2 eyes darkly pigmented. Buccal cone long, labrum ogival. Head with chaetae A, B, C, D, F and G. Chaetae E and O 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. Claw with inner tooth. Tibiotarsi with long chaetae B4 and B5.

Description. Habitus typical of the genus. Body length (without antennae): 0.49 (juvenile)– 1.61 mm (holotype: 1.61 mm). Colour of the body bluish grey. 2+2 large dark-pigmented eyes ( Fig. 53 ).

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 1 2 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: 5-6; 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

Types of dorsal ordinary chaetae. Macrochaetae Ml slightly thickened, relatively long, straight or arc-like, narrowly sheathed, feebly serrated, apically rounded or pointed ( Figs 53–55 ); macrochaetae Mc and Mcc thickened, straight, pointed or apically rounded; mesochaetae and microchaetae short, thin and pointed.

Head. Buccal cone long. Labrum ogival, with ventral sclerifications as in Fig. 50 . Labrum chaetotaxy 4/2, 4. Labium with four basal, three distal and four lateral chaetae, papillae x absent. Maxilla styliform, mandible thin with two basal and two apical teeth. Chaetotaxy of antennae as in Figs. 49, 52 and Tab. 6 c. Apical vesicle trilobed.

S–chaetae of ant. IV of medium length and relatively thin. Chaetotaxy of head as in Tab. 6 a, b, and Fig. 53 . Tubercle Af on head longer than tubercles Oc. Chaeta D free. Elementary tubercles CD and BE present ( Fig. 53 ). Chaeta A shorter than B.

Thorax, abdomen, legs. Body s-chaetae thin and smooth, shorter than nearby macrochaetae ( Figs 53–54 ). Chaetotaxy of thorax and abdomen as in Tab. 6 d and in Figs 53–54 . Tubercles Di on th. I differentiated but not fused with De ( Fig. 53 ). 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. 54 ). The line of chaetae De1-chaeta s parallel to the dorsomedian line on abd. I–III. Tubercles Di on abd. V fused, with chaetae Di3 as mi ( Fig. 54 ). Furca rudimentary without microchaetae. Chaetae Vl on abd. V present. Cryptopygy well developed, abd. VI only partially visible in dorsal view ( Fig. 54 ). Chaetotaxy of legs as in Fig. 51 and Tab. 6 d. Claw with distinct inner tooth ( Fig. 51 ).

Remarks. The following set of characters: body grayish-blue, absence of chaeta O on head, same number of chaetae De on th. II– abd. III, chaetae De 3 on th. II–abd. III free, presence of distinct inner tooth on claw and elongated chaetae B4 and B5 on tibiotarsi, place the new species closely to E. dentifera Smolis et al., 2007 , described from Crimea ( Smolis et al. 2007). Nevertheless, the two species differ in several essential features: presence/absence of chaetae E on head (in cryptopyga absent, in dentifera present), number of chaetae Dl on head (in cryptopyga 5, in dentifera 6), number of chaetae (L+So) on head (in cryptopyga 8, in dentifera 10), shape of ventral sclerifications of labrum (in cryptopyga ogival, in dentifera nonogival) and presence/absence of cryptopygy (in cryptopyga present, in dentifera absent).

Ecological note. Holotype of the new species was collected within subalpine zone, in mosses and silt on rocks ( Fig. 56 ), other specimens were found in forest belt.

Figures

FIGURE 56. Mosses on rocks in subalpine zone of Achishkho Range, type locality of Endonura cryptopyga sp. nov.

FIGURES 49 – 55. Endonura cryptopyga sp. nov.: 49, dorsal chaetotaxy of ant. III – IV; 50, chaetotaxy of labrum; 51, tibiotarsus and claw III, ventrolateral view; 52, sensillum sgv and ms of ant. III; 53, dorsal chaetotaxy of head and th. I – II (holotype); 54, dorsal chaetotaxy of abd. III – VI (holotype); 55, chaeta Di 1 of abd. V.

Tables

TABLE 6. Chaetotaxy of Endonura cryptopyga 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 Mc Mcc or mi	Ocm Ocp Oca
Di	2	Ml Mcc	Di1 Di2
De	2	Ml Mc	De1 De2
Dl	5	Ml Mc Mcc	Dl1, Dl5 Dl4 Dl2, Dl6
(L+So)	8	Ml Mcc me	L1, L4, So1 L2 So3–6