Borgesminthurinus andinus gen. nov., sp. nov. Palacios-Vargas et Vacaflores-Argandoña

Figs. 1‒32

Type locality: Bolivia, Department of La Paz, Province Los Andes Location Pucarani-Condoriri, River Palcoco, sample taken with surfer in the river, with riverside vegetation corresponding to ecological floor of PUNA, geographical coordinates of sampling 16°30’01” S and 68°35’08” W to 4,139 m. a.s.l. Collection date corresponding to the end of the wet season in the region 21/iv/2017, Adilen Fernández coll.

Type material. Holotype female and 9 paratypes will be kept at senior author institution. Two paratypes will be deposited at Bolivian Wildlife Collection, Institute of Ecology, Universidad Mayor de San Andrés, La Paz, Bolivia.

Description. Body length (n=10): 1,250 μm; head 640 μm. Cuticle finely granulated. Setae thin and smooth on Ant. IV, labrum, labium and furcula (Figs 1, 4, 5, 6, 15); thick and finely barbulate on Ant. I‒III; head, body, and legs (Figs 2, 3, 24, 25, 31), except 4 pair of setae at posterior part of Abd. IV. Ventrally without barbulate setae (Fig. 23). Colour very dark purple almost black, with a pattern of several circular or elliptical sepia patches on head (Fig. 20); eyes patch black. Body very dark purple, almost black, with irregular pattern of circular or elliptical patches, and four constant bands, 2 on Th. I, 1 on Th. II and III, and one between the greater abdomen and lesser abdomen (Fig. 19).

Ant. I and II very dark, III and IV lighters. Legs and furcula paler than body. Body globular; Abd. V distinctly from furcal and anal segment (Fig. 17). Head clothed with abundant moderately long and thick barbulate setae, those on top of head longer and thicker than those of anterior part (Figs 8, 24). Three short trichobothria (A-C) on each side of greater abdomen, arranged in a triangle (Fig. 31), B, closer to A. Lesser abdomen with a short trichobothria D (Fig. 17) between 2 microsetae. Antennae about 1.2-1.4 times longer than the diameter of the head. Relative lengths of Ant. I: II; III; IV are as 1: 2.4; 2.9; 7.5 (Figs 1, 2). Ant. I with 5 thick barbulate setae and 2 smooth thin and short ventrals. Ant. II with 16 thick barbulate setae and 2 ventral smooth. Ant. III with 17 thick barbulate setae (not longer than the width of Ant.) and 4 smooths; in middle part with a papilla subdivided into four vesicles (Figs 2, 25). Ant. organ III with 2 exposed, short elliptical sensilla, two guard sensilla smooth thin and shorter than setae and one short ventral microsensillum (Fig 3). Ant. IV simple, without subdivisions, about 1.5 times the size of Ant. III, with 14-15 irregular whorls of setae, which are in 8 longitudinal rows; 2 rows of short sensilla and one subapical pit (Figs 1, 26).

Labrum with 6 prelabral setae; 5 p, 5 m and 4 a, those lateral thicker than other (Figs 4, 28). Mandible well developed, with molar-plate and apically with 5 teeth. Head of maxilla globular with 2 teeth and six lamellae (Fig. 7). Eight eyes on each side of the head, cornea C, D and G smaller than others (Figs 8, 27). Interocular setae short and close to cornea G. Two small cuticular lobulations on central part of head close to eye-patch (Fig. 24). Labium (Fig. 6) with 7 pairs basal setae (5 V and 2 Cp) 4 distal medial (L), 5 centro distal and two pairs of postlabial (in parenthesis chaetotaxy following Baquero et al. 2006). Labial papilla with tubercles A-E (sensu Fjellberg 1999).

Metathoraxic trochanter with trochanteral organ (Figs 11, 21). Tibiotarsi I-III with 7 clearly capitate tenent hairs (Figs 9, 10, 12, 13). According to Nayrolles (1988), the setae would be named as: ka, kp; and setae from whorl I: a, ae, e, pe, p. Unguis moderately long with one inner tooth in the third apical (Figs 13, 34); dorsally with a big and long pseudonychia with about 9 teeth on each side (Figs 12, 13). No tunica. Ratio ungues/empodial appendage 1: 0.5. Empodial appendage lanceolate, lamellate, several corner-teeth and small subapical filament (Figs 9, 10, 12, 13), Tita. I, with subapical filament extending to tip of ungues (Fig. 29), on other Tita. they are shorter than unguis (Fig. 30).

Tenaculum with tridentate rami (sometimes with an apical filament on one or both rami), and one small appendage at the base of each rami (Fig. 14); corpus tenaculum with 2 setae. No neosminthuroid seta. Manubrium with 9 pairs of setae (Fig. 15). Ratio manubrium: dens; mucro as 1: 1.3; 4.2. Dens with a total of 22 setae (Fig. 15), 8 external setae (E 1‒8), four dorso-internal setae (Di 1, Di 2‒5) and three lateral setae (L 1, L 5‒6); three ventro-distal, two ventro-subapical (Ve 2), one ventro-proximal (Ve 5)‒‒ventral formula: 4, 2 … 1. Dens about 3 times length of mucro. Mucro serrated only in inner edge, and with two notches in outer edge (Fig. 15). Mucronal seta absent.

Subanal appendage of female thick, palmate with 7‒11 branches (Figs 18, 22). Ratio mucro: subanal append-age: 1.2. Female genital plate with 7‒15 setae (Figs 18, 22). Seta A0 acuminate (Fig. 18). Anal valves of females without winged setae or basally broadened. Males not found.

Variation. Ant. III papilla seems to have 3 or 4 vesicles depending on the position. Number of branches of female anal appendage from 7 to 11.

Derivatio nominis: The name of the new species is locative, for Los Andes.