Endonura annae

Description. General. Body length (without antennae): 0.8 to 1.45 mm (holotype: 1.25 mm). Colour of the body white. 2 + 2 large black eyes, in a typical arrangement for the genus (Fig. 14). Chaetal morphology. Dorsal ordinary chaetae of four types: long macrochaetae (Ml), short macrochaetae (Mc), very short macrochaetae (Mcc) and mesochaetae. Long macrochaetae thick, slightly arc-like, narrowly sheathed, feebly serrated, apically rounded (Figs 14, 23, 25). Macrochaetae Mc and Mcc morphologically similar to long macrochaetae, but shorter. Mesochaetae similar to ventral chaetae, thin, smooth and pointed. S-chaetae of terga thin, smooth and short, notably shorter than nearby macrochaetae (Figs 14, 23, 24). Antennae. Typical of the genus. Dorsal chaetotaxy of Ant. III-IV as Fig. 22 and Table 5. S-chaetae of Ant. IV of medium length and moderately thickened, sensillum sgd notably short (Fig. 22). Ant. III with two chaetae d. Apical vesicle distinct, trilobate (Figs 19, 20). Ventral chaetotaxy of Ant. III as in Table 5, sensillum sgv long and slightly s-shaped (Fig. 21). Mouthparts. Buccal short and wide with labral sclerifications nonogival (Fig. 15). Labrum chaetotaxy: 4 / 2, 4 (Fig. 15). Labium with four basal, three distal and four lateral chaetae, papillae x absent (Fig. 18). Maxilla styliform (Fig. 17), mandible with four teeth and relatively thin (Fig. 16). Dorsal chaetotaxy and tubercles. Head without chaetae O, C, So 2 and L 3 (Fig. 14). Chaetae D free and not connected with tubercle. Tubercles Di on Th. I differentiated, not fused with tubercles De (Fig. 14). Th. III and Abd. I-III without free chaetae De 2 and De 3 (Figs 14, 23). On Abd. I-III, the line of chaetae De 1 - chaeta s perpendicular to the dorsomedian line. On Abd. III-IV, chaetae Di 1 notably longer than chaetae Di 1 of Abd. V (Fig. 23). On Abd. V, tubercle (Di + Di) with 2 + 2 chaetae. Cryptopygy strongly developed, Abd. VI practically not visible from above (Fig. 23). Ventral chaetotaxy. On head, groups Vea, Vem and Vep with 3, 4, 4 chaetae, respectively. Group Vi on head with 6 chaetae (Fig. 18). On Abd. IV, furca rudimentary without macrochaetae, tubercle L with 6 chaetae (Fig. 27). On Abd. V, chaetae Vl and L' present. Legs. Chaetotaxy of legs as in Table 6. Claw with internal tooth. On tibiotarsi, chaeta M present and chaetae B 4 and B 5 relatively short and pointed (Fig. 26).

Diagnosis. Habitus typical of the genus Endonura. Dorsal tubercles present and well developed. 2 + 2 large pigmented eyes. Buccal cone short, labrum nonogival. Head with chaetae A, B, D and E. Chaetae O and C absent. Tubercles Cl and Af separate. Tubercles Dl and (L + So) on head with 6 and 8 chaetae, respectively. Tubercles Di on Th. I present. Tubercles De on Th. II and III with 3 and 4 chaetae, respectively. Tubercles L on Abd. III and IV with 3 and 6 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 rather short.

Etymology. The new species is dedicated to Anna, wife of the second author.

Other material. Iran, 7 females and male on slide, Gilan Province, near Asalem, 300 - 600 m a. s. l., large beeches, sifting, 30. VI. 1973, leg. A. Senglet, 7308; 3 females on slide, Gilan Province, Shahrbijar, tree hole, humus, sifting, 6. IX. 1973, leg. A. Senglet, 7366; 4 females and juvenile on slide, Gilan Province, Asalem (37 ° 45 ' N, 48 ° 57 ' E), leaves and tree holes, sifting, 11. VI. 1975, leg. A. Senglet, 7519; juvenile on slide, Mazandaran Province, Pol-e Zanguleh, 2300 m a. s. l., 12. VII. 1973, leg. A. Senglet, 7320.