Deutonura sengleti, Smolis & Skarżyński, 2020

Smolis, Adrian & Skarzynski, Dariusz, 2020, Contribution to the knowledge of Neanurinae of north-western Iran with description of seven new species (Collembola, Neanuridae), ZooKeys 992, pp. 105-138 : 105

Deutonura sengleti sp. nov. Figs 53-61 , Tables 13, 14, 15

Type material.

Holotype: female on slide, Iran, Gilan Province, Shahrbijar, tree hole, humus, sifting, 6.IX.1973, leg. A. Senglet, sample 7366. Paratypes: 2 males on slide, same data as holotype.

Other material.

Iran, 2 males on slide, Gilan Province, Limir, large trees in marsh, sifting, 28.VI.1973, leg. A. Senglet, 7306; female, 2 males and juvenile on slide, Gilan Province, road to Jirandeh, 1000 m a.s.l., forest, 9.VIII.1974, leg. A. Senglet, 7486; female, male and juvenile on slide, Gilan Province, near Asalem (37°38'N, 48°48'E), 1800 m a.s.l., tree holes, sifting, 10.VI.1975, leg. A. Senglet, 7516; 2 males and juvenile on slide, Gilan Province, near Asalem (37°40'N, 48°52'E), 1200 m a.s.l., tree holes, sifting, 10.VI.1975, leg. A. Senglet, 7517; female on slide Gilan Province, Asalem (37°45'N, 48°57'E), leaves and tree holes, sifting, 11.VI.1975, leg. A. Senglet, 7519; male on slide, Mazandaran Province, near Amol, forest, sifting, 18.VII.1973, leg. A. Senglet, 7329b; male on slide, Mazandaran Province, road to Tchorteh, 800 m a.s.l., tree and leaves, sifting, 5.VIII.1974, leg. A. Senglet, 7482.

Etymology.

The new species is dedicated to Antoine Senglet, collector of the Iranian material studied and prominent Swiss Arachnologist.

Diagnosis.

Habitus typical of the genus Deutonura . Dorsal tubercles present and well developed. 2+2 large pigmented eyes. Buccal cone relatively long and narrow, labrum without ogival sclerifications. Head without chaetae O, So2 and L3. Tubercles Cl and Af separate. No granular area between chaetae A and B on head. Tubercles De on Th. II and III with 3 and 4 chaetae, respectively. Tubercles Di on Abd. V not bilobed. Cryptopygy not developed. Male ventral organ present.

Description.

General. Body length (without antennae): 0.85 (juvenile) to 1.55 mm (holotype: 1.45 mm). Colour of the body bluish-grey. 2+2 large black eyes, in a typical arrangement for the genus (Fig. 53 ).

Chaetal morphology. Dorsal ordinary chaetae of five types: long macrochaetae (Ml), short macrochaetae (Mc), very short macrochaetae (Mcc), mesochaetae and microchaetae. Long macrochaetae thickened, slightly arc-like or straight, narrowly sheathed, serrated, cylindrical, apically rounded (Figs 53 , 56 , 60 ). Macrochaetae Mc and Mcc morphologically similar to long macrochaetae, but much shorter (Figs 53 , 60 ). Mesochaetae similar to ventral chaetae, thin, smooth and pointed. Microchaetae similar to mesochaetae, but clearly shorter (Figs 53 , 60 ). S-chaetae of terga thin, smooth and short, notably shorter than nearby macrochaetae (Figs 53 , 57 , 60 ).

Antennae. Typical of the genus. Dorsal chaetotaxy of Ant. III-IV as in Fig. 54 and Table 14 . S-chaetae of Ant. IV long and relatively thin, S3 notably longer than others, sensillum sgd of medium size and straight (Fig. 54 ). Apical vesicle distinct, trilobate. Ventral chaetotaxy of Ant. III as in Fig. 55 and Table 14 .

Mouthparts. Buccal cone relatively long and narrow, labral sclerifications nonogival (Figs 58 , 59 ). Labrum chaetotaxy: 4/2, 4 (Fig. 59 ). Labium with four basal, three distal and four lateral chaetae, papillae x absent. Maxilla styliform mandible thin and tridentate.

Dorsal chaetotaxy and tubercles. Head without granular area between chaetae A and B. Elementary tubercles DE and EE on head absent (Fig. 53 ). Head without chaetae O, L3 and So2, chaeta D free. Chaetae C as Mccormi (Fig. 53 ). Chaetae Ocm and Ocp of nearly equal length. Chaetae De2 on head as mior rarely Mcc (Fig. 53 ). Th. I with tubercles Di and De fused (Fig. 53 ). Chaetae Di3 on Th. II-III free. On Th. III, chaetae De2 slightly longer than De3 (Fig. 53 ). On Abd. I-III, chaetae De2 shorter than De3. Cryptopygy absent, Abd. VI well visible from above.

Ventral chaetotaxy. On head, groups Vea, Vem and Vep with 3, 4 and 4 chaetae, respectively. Group Vi on head with 6 chaetae. On Abd. IV, furca rudimentary with 6 minute microchaetae without visible chaetopores (Fig. 61 ). Male with thick and forked chaetae (male ventral organ) on furca rudimentary (Abd. IV, Fig. 61 ) and around genital aperture (Abd. V). On Abd. V, chaetae Vl and L’ present.

Legs. Chaetotaxy of legs as in Table 15 . Claw without internal tooth. On tibiotarsi, chaeta M present and chaetae B4 and B5 of medium size and pointed.

Remarks.

The new species runs in the most recent key to Deutonura species ( Deharveng et al. 2015) to D. caerulescens Deharveng, 1982 from France ( Deharveng 1982). However, these species differ in the number of chaetae (L+So) on the head (in sengleti , 8, in caerulescens , 9-10), the presence of microchaetae on furca rudimentary (in sengleti , present, in caerulescens , absent), the number of chaetae L on Abd. III and IV (in sengleti , 3 and 6 chaetae, in caerulescens , 4 and 8 chaetae), the number of chaetae on tubercle (De+Dl+L) of Abd. V (in sengleti , 5+s, in caerulescens , 7+s) and ratio of chaetae Di1:Di2:Di3 on Abd. V (in sengleti , 1:4:16, in caerulescens , 1:2:4 or 1:3:7).

Figures

Figures 53 - 61. Deutonura sengleti sp. nov. 53 chaetotaxy of head, Th. and Abd. I (holotype), dorsolateral view 54 dorsal chaetotaxy of Ant. III-IV 55 ventral chaetotaxy of Ant. III 56 chaeta Di 1 of Abd. V 57 sensillum of Abd. V 58 apical part of labrum 59 chaetotaxy and ventral sclerifications of labrum 60 dorsal chaetotaxy of Abd. V-VI (holotype) 61 ventral chaetotaxy of Abd. III-IV (adult male).