Trachyuropoda (Leonardiella) imitans Berlese, 1905: 159, fig. 14. - Wiśniewski & Hirschmann, 1993: 85. - Wiśniewski, 1993a: 278–278. - Wiśniewski, 1993b: 399.

Distribution: Indonesia (Java).

Justification: Judging from the large, kidney-shaped lateral depressions in the dorsal idiosoma which were illustrated by Berlese (1905), we transfer this species from the genus Trachyuropoda to the genus Arculatatrachys.

Trachyuropoda cistulata Hirschmann, 1975: 103–104, fig. 115. - Wiśniewski & Hirschmann, 1993: 87. - Wiśniewski, 1993a: 276. - Wiśniewski, 1993b: 398.

Distribution: Sri Lanka.

Justification: Due to the triangular shape of the idiosoma and the presence of a ventral depression posterior to coxae IV (see Hirschmann, 1975) we transfer this species from the genus Trachyuropoda to Leonardiella.

Trachyibana sarawakiensis Kontschán, 2015: 273–277, figs 1–18.

Distribution: East Malaysia (Sarawak).

Trachyuropoda micherdzinskii Hirschmann, 1976: 29–30, fig. 18. - Wiśniewski & Hirschmann, 1993: 86. - Wiśniewski, 1993a: 277. - Wiśniewski, 1993b: 399.

Distribution: Vietnam.

Justification: See the next species.

Trachyuropoda tuberculata Berlese, 1913: 85, fig. 14. - Hirschmann & Zirngiebl-Nicol, 1969: 131. - Wiśniewski & Hirschmann, 1993: 86. - Wiśniewski, 1993a: 277–278. - Wiśniewski, 1993b: 400.

Distribution: Vietnam and Indonesia (Java).

Justification: Both B. tuberculata and B. micherdzinskii have a horizontal furrow on the dorsal shield which is a diagnostic character of the genus Bostocktrachys, therefore we transfer these species to the genus Bostocktrachys.

Holotype: MHNG, sample TL-15/09; female; Thailand, Surin Province & District, mixed evergreen-deciduous forest near prison, 14°52′36″N, 103°27′24″E, 150 m, 9.VII.2014; leg. P. Schwendinger.

Paratypes: MHNG; two females and two males with same data as for the holotype.

Diagnosis: Distinguished from the other two known Bostocktrachys species by smooth and spiniform dorsal setae, except for five pairs of short and apically pilose setae situated close to posterior margin of dorsal shield. Four vertical grooves with a strongly sclerotized horizontal crossbar situated posterior to horizontal furrow. Surface of genital shield of female smooth. Position and shape of strongly sclerotized dorsal grooves and humps unique within the genus Bostocktrachys. Only one species in this genus (B. micherdzinskii) has short apically serrate caudal setae. Beside the dorsal characters, the most important differences between these two species is the sculptural pattern of the female genital shield, which is smooth in the new species and ornamented with oval pits in B. micherdzinskii.

Description of female: Length of idiosoma 1000, width 700. Shape oval, with vertex slightly elongated; posterior margin rounded. Color reddish brown.

Dorsal idiosoma (Fig. 1): Dorsal and marginal shields fused anteriorly. Dorsal shield neotrichous, majority of dorsal setae spiniform (about 21–27 long) some of them pilose, others smooth (Figs 2–3). Ten short (about 8–10 long) and apically pilose setae in four groups (2-3-3-2) situated close to caudal margin of dorsal shield. Surface of dorsal shield bearing numerous strongly sclerotized structures. Numerous short, strongly sclerotized grooves situated close to margins of dorsal shield. One pair of large L-shaped grooves in anterior area of dorsal shield, one pair of C-shaped grooves located near end of L-shaped structures. A deep transversal furrow situated in central area of dorsal shield, anterior to furrow with one pair of long strongly sclerotized grooves and a V-shaped strongly sclerotized structure. Four longitudinal grooves anteriorly connected by a strongly sclerotized transversal crossbar situated posterior to transversal furrow. Surface of dorsal shield with some oval pits. Marginal shield without sculptural pattern; with spiniform setae (about 24-31 in length).

Ventral idiosoma (Fig. 4): Tritosternum with narrow and oval basis; laciniae with two smooth inner and two apically pilose outer branches (Fig. 6). Sternal shield without sculptural pattern and bearing smooth, short (about 16-20 in length) and needle-like setae. Numerous setae visible close to coxae IV. One pair of lyriform fissures situated close to anterior margin of sternal shield. Genital shield scutiform (about 235 long and about 145 wide) its surface smooth (Fig. 5). Ventral shield with oval pits, bearing smooth and needle like seta (about 24-28 long). Numerous setae situated in a horizontal row posterior to coxae IV, some setae placed on three strongly sclerotized humps close to caudal margin. Setae around anal opening similar in shape and length to other ventral setae. Stigmata situated between coxae II and III. Prestigmatic part of peritremes long and hook-shaped, poststigmatic part short (Fig. 4). Pedofossae deep, their surface smooth, only some denticles visible on posterior margins of pedofossae IV.

Gnathosoma (Fig. 7): Corniculi horn-like, internal malae longer than corniculi and divided into four fringed branches. Hypostomal setae h1 short (about 28-30 in length) and smooth, h2-h4 marginally serrate, h2 and h4 short (about 50-55 in length), h3 long (about 93-95 in length), h3 situated close to h2. Deutosternal region smooth. Palpal trochanter with one short and smooth, and one long and marginally serrate seta. Other setae on palp smooth and needle-like, except for one pilose seta on dorsal side of femur; palpal claw bifurcate. Epistome subtriangular and deeply serrate on anterior margin (Fig. 8). Chelicerae with one tooth on movable and fixed digit, fixed digit longer than movable digit, pilus dentilis absent, internal sclerotized node present, one dorsal seta present (Fig. 9).

Legs (Figs 11-14): Leg I 400-410 long, leg II 345-350, leg III 365-375, leg IV 420-430. Legs I-IV each with a pair of claws at tip of ambulacral prolongation; claws of legs I smallest. Most setae on legs needle-like, several robust and serrate setae situated on all legs. Flap-like processes present on femora II-IV and coxa I.

Description of male: Length of idiosoma 960-1000, width 660-700 (n=3). Shape same as in females.

Dorsal idiosoma: Ornamentation and chaetotaxy of dorsal shield as in female.

Ventral idiosoma: Ornamentation and chaetotaxy of ventral shield as in female. Sternal shield without sculptural pattern (Fig. 10). Positions of sternal setae as in Fig. 10. Sternal setae smooth and needle-like (about 15-20 long), one pair of lyriform fissures situated close to first sternal setae. Genital shield rounded (about 53-55 × 62-65 in dimension) and placed between coxae III. Other characters same as in female.

Nymph and larva unknown.

Etymology: The name of the new species refers to the province where the type specimens were collected.

Holotype: MHNG, sample 24-Th-79; female; Thailand, Bangkok, soil sample from base of tree; Berlese-extraction in Geneva; 17.VIII.1979; leg. J. Robert.

Paratypes: MHNG; two females and one male with same data as for holotype.

Diagnosis: Distinguished from the other congeneric species by most of dorsal setae smooth and spiniform. Anterior margin of furrow borders wide, elevated area with strongly sclerotized and V-shaped posterior margin. Anterior parts of elevated area forming one pair of L-shaped, strongly sclerotized structures with deep pits at their corners. Deep horizontal furrow bordered in posterior part with a wide U-shaped sclerotized area. Only Bostocktrachys tuberculata has similar strongly sclerotized dorsal structures. In B. tuberculata the elevated area posterior to the furrow is rounded and narrower than the elevated area anterior to the furrow, whereas in the new species it is quadrangular and as wide as the elevated area anterior to the furrow. The posterior margin of the elevated area anterior to the transversal furrow also differs: it is straight in B. tuberculata, but slightly bent in the new species.

Description of female: Length of idiosoma 1065-1120, width 700-795 (n=3). Shape oval, with vertex slightly elongated, posterior margin rounded. Color reddish brown.

Dorsal idiosoma (Fig. 15): Dorsal and marginal shields fused anteriorly. Dorsal shield neotrichous, majority of dorsal setae spiniform (about 32-44 long), some of them pilose, others smooth. Surface of dorsal shield with oval pits and bearing numerous strongly sclerotized structures. A deep transversal furrow situated in central area of dorsal shield. One pair of strongly sclerotized rings visible at lateral ends of furrow. Anterior margin of furrow borders forming a wide and elevated area with strongly sclerotized and V-shaped posterior margin. Anterior parts of elevated area forming one pair of L-shaped, strongly sclerotized structures with deep pits at their corners. Deep transversal furrow bordered in posterior part by a wide U-shaped sclerotized area bearing pilose setae on margins and smooth setae in central area. Numerous C-shaped humps situated close to lateral and caudal margins of dorsal shield, these humps bearing smooth setae. Marginal shield without sculptural pattern and bearing spiniform setae (about 33-42 long). Ventral idiosoma (Fig. 16): Tritosternum with narrow and oval basis; laciniae with two smooth inner and two apically pilose outer branches (Fig. 17). Sternal shield without sculptural pattern. First three pairs of sternal setae serrate, others smooth and needle-like, all sternal setae short (about 18-21 in length). Numerous setae visible close to coxae IV. One pair of lyriform fissures situated close to anterior margin of sternal shield, another pair situated in central area of sternal shield, a third pair at level of posterior margin of coxae III and a fourth pair at level of central area of coxae IV. Genital shield scutiform (about 260-270 long and 170-180 wide), its surface with oval pits (Fig. 22). Ventral shield ornamented with oval pits, bearing smooth and needle-like setae, shape similar to sternal setae but longer (about 30-36). Numerous setae situated in a transversal row posterior to coxae IV; in central section of each row one pair of humps carrying numerous setae. Similar humps with setae situated close to caudal margin of ventral idiosoma. Anal opening situated in a drop-shaped area bearing four setae similar in shape and length to other ventral setae plus one pair of lyriform fissures. Stigmata situated between coxae II and III. Prestigmatic part of peritremes long and hook-shaped, poststigmatic part short. Pedofossae deep, their surface smooth.

Gnathosoma (Fig. 18): Corniculi horn-like, internal malae longer than corniculi and divided into four fringed branches. Hypostomal setae h1 short (about 25-27 in length) and smooth, h2 and h4 apically bifurcated, h2 smooth, h3 and h4 marginally serrate, h2 and h4 short (about 45-55), h3 long (about 75-80), h3 situated close to h2. Palpal trochanter with one short and smooth, and one long and serrate ventral seta. Other setae on palp smooth and needle-like, except for one pilose seta on dorsal side of femur (Fig. 21). Epistome subtriangular and strongly serrate on lateral margins (Fig. 19). Chelicerae with one tooth each on movable and fixed digit, fixed digit longer than movable digit, pilus dentilus absent, internal sclerotized node and one dorsal seta present (Fig. 20).

Legs (Figs 23-26): Leg I 460-465 long, leg II 400-410, leg III 420-430, leg IV 460-465. Legs I-IV each with a pair of claws at tip of ambulacral process, claws of legs I smallest. Most setae on legs needle-like, some robust and serrate setae situated on all legs. Flap-like processes on femora II-IV.

Description of male: Length of idiosoma 1120, width 745 (n=1). Shape same as in females.

Dorsal idiosoma: Ornamentation and chaetotaxy of dorsal shield as in female.

Ventral idiosoma: Ornamentation and chaetotaxy of ventral shield as in female. Sternal shield without sculptural pattern (Fig. 27). Sternal setae smooth and needle-like (about 17-20 long), situated close to margins of sternal shield and around genital opening (Fig. 27). Genital shield rounded (about 47×50 in dimension) and situated between coxae III-IV. Other characters as in female.

Nymph and larva unknown.

Etymology: The name of the new species refers to the country where the type specimens were collected.