Ripersiella incarum Kaydan & Szita, sp. n.

(Fig. 1).

Material examined. Holotype ♀. Peru: Cusco Region / Machu Picchu / 7.xii.1972 / Leg. Balogh J. (PPI code: 12844; HNHM code: D-Am 3189); additional information: 2000 m a.s.l., moss forest, in leaf litter and roots.

Description of the slide-mounted adult female. Body elongate-oval, 1.18 mm long, 0.68 mm wide. Eyes marginal, each about 12.5 μm wide. Antenna 5 segmented, 210 μm long; apical segment 85 μm long, 32.5 μm wide, with 4 fleshy setae, each seta 30–50 μm long, and apical setae each about 35 μm long. Clypeolabral shield 95 μm long, 105 μm wide. Labium 3 segmented, 115 μm long, 85 μm wide. Anterior spiracles each 32–35 μm long, 12–15 μm wide across atrium; posterior spiracles each 32–35 μm long, 12–15 μm wide across atrium. Legs well developed, length data for posterior legs: coxa about 110 μm, trochanter + femur 160–165 μm, tibia + tarsus about 175 μm, claw 30–35 μm. Ratio of lengths of tibia + tarsus to trochanter + femur 1.06–1.09:1; ratio of lengths of tibia to tarsus 0.89–1.0:1; ratio of length of hind trochanter + femur to greatest width of femur 2.75–3.2:1. Claw digitules spine-like, each about 7.5 μm long, shorter than claw. Claw without a denticle. Both pairs of ostioles present; anterior ostioles each with a total of 16 trilocular pores and 8 setae for both lips; posterior ostioles each with a total of 24–26 trilocular pores and 12–19 setae for both lips. Anal ring without spicules, 45 μm wide, bearing 6 setae, each seta 65–75 μm long.

Dorsum. Derm membranous, without any cerarii around body margin. Setae on each anal lobe hair-like, each 50–55 μm long; body setae short flagellate, each 15–30 μm long, scattered on head, thorax and abdominal segments. Trilocular pores each 4–5 μm in diameter, scattered over entire body. Multilocular disc pores absent. Bitubular ducts, each duct 10 μm wide at mid-point, present in longitudinal single rows on medial, submedial and marginal areas; in a single row across abdominal segments, numbers as follows: segment I, 6; II, 5; III, 5; IV, 4; V, 5; VI, 4; VII, 6; VIII + IX, 0, and on head and thorax, 18. Tubular ducts absent.

Venter. Setae flagellate, each 10–55 μm long, longest setae situated medially on head. Apical setae of anal lobe broken. Multilocular disc pores absent. Trilocular pores each 3–4 μm in diameter, scattered. Bitubular ducts, each duct 7–8 μm wide at mid-point, present in a longitudinal row on margins of abdomen and thorax, 1 on mid-area of each of abdominal segments VII and VI, and on mid-area of mesothorax.

Distribution. Peru.

Etymology. The name of the species is dedicated to the Inca people, as the specimen was found at Machu Picchu, near the most prominent icon of the Inca civilization.

Diagnosis. Ripersiella incarum Kaydan & Szita sp. n. can be recognized by the combination of the following features: (i) antenna 5 segmented; (ii) circulus absent; (iii) bitubular ducts of one size on dorsum, distributed in longitudinal single rows on medial, submedial and marginal area; (iv) multilocular pores absent; and (v) tubular ducts absent. Ripersiella incarum sp. n. is similar to R. caledonensis and R. boharti in lacking circuli, but differs from them both in lacking multilocular pores and tubular ducts and in having 5-segmented antennae (multilocular pores and tubular ducts present, antennae 6 segmented in R. caledoniensis and R. boharti). Ripersiella incarum sp. n. is also similar to R. gombakensis (Williams) in lacking multilocular pores and tubular ducts, but differs in lacking a circulus and having 5-segmented antennae (circulus present and antennae 6 segmented in R. gombakensis).