Deutonura sengleti

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, S 3 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, L 3 and So 2, chaeta D free. Chaetae C as Mccormi (Fig. 53). Chaetae Ocm and Ocp of nearly equal length. Chaetae De 2 on head as mior rarely Mcc (Fig. 53). Th. I with tubercles Di and De fused (Fig. 53). Chaetae Di 3 on Th. II-III free. On Th. III, chaetae De 2 slightly longer than De 3 (Fig. 53). On Abd. I-III, chaetae De 2 shorter than De 3. 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 B 4 and B 5 of medium size and pointed.

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, So 2 and L 3. 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.

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

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, 7329 b; male on slide, Mazandaran Province, road to Tchorteh, 800 m a. s. l., tree and leaves, sifting, 5. VIII. 1974, leg. A. Senglet, 7482.