Endonura schwendingeri

Description. General. Body length (without antennae): 0.5 (juvenile) to 1.15 mm (holotype: 1.1 mm). Colour of the body bluish-grey. 2 + 2 large black eyes, in a typical arrangement for the genus (Fig. 29). Chaetal morphology. Dorsal ordinary chaetae of five types: long macrochaetae (Ml), short macrochaetae (Mc), very short macrochaetae (Mcc), mesochaetae and microchaetae. Long macrochaetae relatively thin, straight or slightly arc-like, narrowly sheathed, feebly serrated, apically rounded (Figs 29, 39, 40). Macrochaetae Mc and Mcc morphologically similar to long macrochaetae, but much shorter (Figs 29, 39). Mesochaetae similar to ventral chaetae, thin, smooth and pointed. Microchaetae similar to mesochaetae, but clearly shorter (Figs 29, 39). S-chaetae of terga thin, smooth and short, notably shorter than nearby macrochaetae (Figs 29, 39, 41). Antennae. Typical of the genus. Dorsal chaetotaxy of Ant. III-IV as Fig. 36 and Table 8. S-chaetae of Ant. IV of medium length and thickened, sensillum sgd short and straight (Fig. 36). Apical vesicle distinct, trilobate (Figs 34, 35). Ventral chaetotaxy of Ant. III-IV Table 8, sensillum sgv as Fig. 37. Mouthparts. Buccal cone relatively short with labral sclerifications nonogival (Fig. 30). Labrum chaetotaxy: 4 / 2, 4. Labium with four basal, three distal and three lateral chaetae, papillae x absent (Fig. 28). Maxilla styliform (Fig. 32), mandible relatively thin with two basal and two apical teeth (Fig. 31). Dorsal chaetotaxy and tubercles. Head without chaetae A, E, Ocp, Dl 3, So 2, L 2 and L 3 absent (Fig. 29), chaeta D free. Tubercles Di on Th. I not differentiated (Fig. 29). On Th. III chaetae De 2 and De 3 free, on Abd. I-III chaetae De 3 free (Figs 29, 39). On Abd. I-III, the line of chaetae De 1 - chaeta s non perpendicular to the dorsomedian line. Cryptopygy present, but weakly developed, Abd. VI partially visible from above (Fig. 39). 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 without microchaetae (Fig. 38). On Abd. IV, group L without free chaeta. On Abd. V, chaetae Vl present, chaetae L' absent (Fig. 38). Male with thick and forked chaetae (male ventral organ) on anal plates (Abd. VI) and in groups: Ag (Abd. V); Vei, Vec and Vel (Abd. IV) and Fu (Abd. III) (Fig. 38). Legs. Chaetotaxy of legs as in Table 9. Claw with internal tooth. On tibiotarsi, chaeta M present and chaetae B 4 and B 5 relatively long and pointed (Fig. 33).

Diagnosis. Habitus typical of the genus Endonura. Dorsal tubercles present. 2 + 2 large pigmented eyes. Buccal cone relatively long, labrum nonogival. Head with chaetae B, C and D. Chaeta O absent. Tubercles Cl and Af separate. Tubercles Dl and (L + So) on head with 5 and 7 chaetae, respectively. Tubercles Di on Th. I absent. Tubercles De on Th. II and III with 3 and 4 chaetae, respectively. Tubercles L on Abd. III and IV with 2 and 4 chaetae, respectively. Abd. IV and V with 8 and 3 tubercles, respectively. Furcal rest without mi. Claw with inner tooth. Tibiotarsi with chaetae B 4 and B 5 long.

Etymology. The new species is dedicated to Peter J. Schwendinger, curator of the Museum d'histoire naturelle in Geneva and prominent Austrian Arachnologist.

Other material. Iran, 3 females and male on slide, Gilan Province, Lunak, 600 m a. s. l., forest, leaves, trunk, sifting, 6. VII. 1973, leg. A. Senglet, 7313.