Sugaentulus andrzeji sp. nov. (Figs. 1–33; Tables 1, 2). Material examined. Holotype female (nr 19.7b) from a moss sample collected in peat in a mixed forest near Turukhansk, 65°48' N 88°00' E, Evenkia, Krasnoyarskiy Kray, Siberia, Russia, 8.VIII.2003, coll. A. Babenko. Paratypes (nr 19.1–19.16) 14 females, 15 males, 5 praeimagoes, 5 maturi juniores, 5 larvae II and 1 larva I collected in a birch forest with dense herbaceous cover, litter and soil on a river terrace near the type locality on same data as the holotype. Paratypes (nr 6580–6584, 6595–6602): 2 females, 5 males, 1 maturus junior, 2 larvae II and 3 larvae I from litter and soil sample from a mountain forest with Pinus sibirica and Abies sibirica, 500–600 m elev., on the northern bank of the lake Teletskoe Ozero, 7 km north-eastern from Artybash, 51°48'N 87°22'E, 10. IX. 1988, coll. S.K. Stebaeva and W.M. Weiner. Two female paratypes (nr 19.17), collected in a litter sample from a pine forest with bilberry (Vaccinium myrtillus), 15 km west of Tomsk, 56° 01'N 84° 04'E, in Timiryazyevskoye Forestry, 23.VIII. 1984, coll. N. Kuznetsova. Other specimens examined. Four females, 5 males, 1 praeimago, 4 maturi juniores, 2 larvae II and 3 larvae I from a litter and soil sample in a birch-fir forest on bank of the river Podkamennaya Tunguska, 61°67’N 90°55’E, 57 m elev., Siberia, Russia, 1. VIII. 2006, coll. M. Shashkov. Type deposition. Holotype (female), 14 females and 14 males, 5 praeimagoes, 5 maturi juniores, 5 larvae II and 1 larva I (slides 19.3–19.7 and 19.11–19.16) and other materials are deposited in the collection of the SMNH. Three female and 7 male paratypes (slides 19.8–19.10) deposited in collection of M. Potapov, Moscow, Russia. Two female, 5 male, 1 maturus junior, 2 larva II and 3 larva I paratypes (slides 6580–6584, 6595–6602 deposited in collection of ISEA. One female and one male paratype (slides 19.1, 19.2) deposited in J. Rusek ’ s collection. All specimens are mounted in microscopic slides in Faure medium (Dunger & Fiedler 1989). Description. Measurements of all stages given in Table 1. Dorsal side of head with moderately long setae, without modified setae, additional and postpseudocular setae present (Fig. 1). Labrum slightly protruded (Fig. 2). Pseudoculus circular, with distinct but short posterior extension, PR 15–20 (Fig. 3). Maxillary gland with slight, weakly visible calyx and without racemose appendices on the surface. Posterior filament short, with small bilobed posterior dilation, CF 6.0–8.8 (Fig. 4). Maxillary palps short, dorsal and lateral sensilla equal in length, leaf-like (Figs 5, 6). Labial palps well developed, with finger-like basal sensillum (Fig. 7). Labium with smooth inner margin. Posterior margin of head with central seta 1 slightly shorter than lateral seta 2, lateral seta 3 half the length of seta 2 (Table 1, Fig. 1). Setae on nota differing only slightly in length (Figs. 10, 11). Setae on pronotum of nearly equal length. Meso- and metanotum with 2+2 anterior setae (A2, A4). Seta M on meso- and metanotum short, half the length of seta P1. Accessory setae P1a, P2a and P3a long, setiform; P5 minute, sensilliform. Length ratio of P1: P1a: P2 on mesonotum as 1.3–1.5: 1: 2. Seta P2a on mesonotum closer to P3 than to P2, on metanotum of the same distance to both mentioned setae. Mesonotum with pores al and sl, metanotum with pores sl only. Prosternum with seta A2, meso- and metasternum without A1 setae (Fig. 14). Setae A2 and M2 on prosternum, and A2 on meso- and metasternum setiform. Prosternum lacking pores; meso- and metasternum usually with two close adjacent median pores. Formula of chaetotaxy given in Table 2. Foretarsus lacking sensillum b’; sensillum t1 claviform; t3 leaf-like; d, f and c’ nearly setiform; remaining sensilla slender (Figs. 8, 9). Sensillum d located almost centrally between sensilla c and e. Sensillum b longer than c and of the same length as sensillum a; c, e, g and a’ shorter than a and b; a’ on the level of t2 insertion. Seta β 1 unmodified, setiform, longer than δ – setae (δ 1 – δ 3), δ 4 setiform, longer than other δ–setae. Claw very long and slender, with single small inner and outer teeth. Empodial appendage short. Relative length of foretarsal sensilla: t3

Published as part of Shrubovych, Julia & Rusek, Josef, 2010, Sugaentulus andrzeji sp. nov. from Siberia, Russia (Protura: Acerentomidae: Acerentominae) and key to Acerentominae genera, pp. 59-68 in Zootaxa 2720 on pages 59-64, DOI: 10.5281/zenodo.199876