Scorpiops dunlopi, Kovařík & Lowe & Stockmann & Šťáhlavský, 2020

Kovařík, František, Lowe, Graeme, Stockmann, Mark & Šťáhlavský, František, 2020, Revision of genus-group taxa in the family Scorpiopidae Kraepelin, 1905, with description of 15 new species (Arachnida Scorpiones), Euscorpius 325, pp. 1-140 : 56-62

Scorpiops dunlopi sp. n.

( Figures 414–415 , 420–442 , 696, 701–702, 707 , 799 , Tables 4, 9) http: //zoobank. org / urn: lsid: zoobank. org: act: B376006F-

9E69-4100-9213-8E4D25AAB110

Euscorpiops sp. 1 : Šťáhlavský et al., in press.

TYPE LOCALITY AND TYPE REPOSITORY. Thailand, Phang Nga Province, 2 km NE Phang Nga, Tham Pha Sua , 8.477309°N 98.539827°E, 40 m. a. s. l.; FKCP.

TYPE MATERIAL. Thailand, Phang Nga Province, 2 km NE Phang Nga, Tham Pha Sua , 8.477309°N 98.539827°E, 40 m a. s. l., 9.XI.2019 , UV detection, under rock at rock face, primary forest, waxing moon, 1♀ (holotype, 1822), leg. Peter Kautt , FKCP; Phang Nga Province, 2 km NE Phang Nga, Tham Pha Sua , 8.475886°N 98.539477°E, 40 m. a. s. l., 14.I.2020, 19:00–22:00 h , UV detection, between rocks at rock face, primary forest, waning moon, 1♀ (paratype), leg. M. Stockmann , FKCP.

ETYMOLOGY. The species epithet is a patronym honoring Jason Dunlop (Museum für Naturkunde der Humboldt-Universität, Berlin, Germany), for his help with this paper.

DIAGNOSIS (♀). Total length 24 mm. Base color uniformly reddish brown to reddish black. Legs and telson yellow to orange. Pectine teeth number 4–5 in female, fulcra present but reduced. Pectines with 2 marginal and 2 middle lamellae. Patella of pedipalp with 16 (5 eb, 2 esb, 2 em, 3 est, 4 et) external and 6 ventral trichobothria. Chela of pedipalp with 4 V series trichobothria located on ventral surface. Chelal trichobothrium Eb 3 located in distal half of manus between trichobothria Dt and Est. Fingers of pedipalps straight in female. Chela length to width ratio 3.15 in female. Pedipalp movable finger with 12 IAD/ID, ca. 35 MD, and 7–8 OD; all these denticles create one irregular row. Tarsomere II of legs with row of 5–6 stout median ventral spinules. Metasoma I with 10 carinae, II–IV with 8 carinae, V with 7 carinae. Telson is sparsely granulate and elongate in female, length to depth ratio 3.1 in female; annular ring developed.

DESCRIPTION (♀ holotype). Total length 24 mm. Male unknown. Habitus as shown in Figs. 414–415 . For position and distribution of trichobothria on pedipalps, see Figs. 423– 429 . Fingers of pedipalps are straight in female ( Fig. 424 ).

Coloration ( Figs. 433–434 ). Base color uniformly reddish brown to reddish black. Telson and legs are yellow to orange. Chelicerae yellowish brown, dark in anterior part, and reticulate.

Carapace and mesosoma ( Figs. 435–436 ). Entire carapace covered with both large and minute granules; carinae absent. Anterior margin of carapace with a deep median notch. Carapace with 3 pairs of lateral eyes of which two are normal and one is reduced. Mesosoma granulated, with one median carina. Tergite VII is pentacarinate. Sternites finely granulated with two parallel furrows except sternite VII, which has four sparsely granulate carinae. Pectine teeth number 4–5 in female, fulcra reduced. Pectines with 2 marginal and 2 middle lamellae. Metasoma and telson ( Figs. 420–422 ). Metasoma sparsely hirsute and granulated. Metasomal segment I with 10 carinae, II–IV with 8 carinae, and V with seven carinae. Median lateral carinae of metasoma V are developed. Dorsolateral carinae of segments III–IV granulate with sharp granules, which terminate posteriorly with a barely pronounced tooth. Telson elongate and smooth with annular ring developed.

Pedipalps ( Figs. 423–432 , 696 ). Pedipalps very sparsely hirsute. Patella with 16 (5 eb, 2 esb, 2 em, 3 est, 4 et) external and 6 ventral trichobothria. Chela with 4 ventral trichobothria located on ventral surface. Femur and patella are sparsely granulated. Femur with 5 granulose carinae and patella with 5 complete carinae with dorsal and ventral patellar spurs reduced. Manus dorsally with fine sparse, rounded granules, which are in the central area represented by large granules. External surface of chela is sparsely covered by minute granules. Movable fingers with 12 IAD+ID in a row, parallel with MD (ca. 35 in number) and there are also 7–8 OD present; all these denticles create one irregular row.

Legs ( Figs. 437–440 ). Tibia and tarsomeres of legs with several setae not arranged into bristle combs on dorsal surfaces but with rows of spinules on dorsolateral and ventrolateral surfaces. Tarsomere II of legs I–IV with 5–6 stout median ventral spinules and two pairs of flanking setae. Femur with 3–4 and patella 4–5 incomplete carinae; both femur and patella are finely granulated. Measurements. See Table 4.

AFFINITIES.The most similar species are S. neradi , S. phatoensis sp. n., and S. schumacheri sp. n. These four species, with total length 23–30 mm, are the smallest members of the genus. Their pedipalp patella has 6–7 ventral and 16 external trichobothria (only 3 trichobothria in est series). Their pedipalp chela movable finger has ID and IAD in a row. In S. dunlopi sp. n. and S. phatoensis sp. n., there are only 12–17 IAD/ID which do not create a parallel row with MD like in S. neradi and S. schumacheri sp. n., which have 20–28 IAD/ID ( Figs. 694– 696 ). Both S. dunlopi sp. n. and S. phatoensis sp. n. are difficult to differentiate morphologically because the male of S. dunlopi sp. n. is unknown. However, S. phatoensis sp. n. has a slightly wider pedipalp chela in the female (chela length to width ratio 2.8 versus 3.15), and the validity of these two species was confirmed DNA analysis (Šťáhlavský et al., in press).

DISTRIBUTION. Thailand ( Fig. 799 ).

Figures

Figure 799. Geographic distribution of the family Scorpiopidae. The map plots locality

Figures 414–415: Scorpiops dunlopi sp. n., female holotype, dorsal (414) and ventral (415) views. Scale bar: 10 mm.

Figures 416–422: Figures 416–418. Scorpiops neradi, male holotype, metasoma and telson lateral (416), ventral (417), and dorsal (418) views. Figure 419. S. neradi, female paratype, metasoma and telson lateral view. Figures 420–422. S. dunlopi sp. n., female holotype, metasoma and telson lateral (420), ventral (421), and dorsal (422) views. Scale bars: 10 mm (416–418, 419, 420–422).

Figures 423–432: Scorpiops dunlopi sp. n., female holotype, pedipalp segments, chela dorsal (423), external (424) and ventral (425) views. Patella dorsal (426), external (427) and ventral (428) views. Trochanter and femur dorsal (429) and ventral (430) views. Movable (431) and fixed (432) finger dentition. Trichobothrial pattern is indicated by white circles.

Figures 433–440: Scorpiops dunlopi sp. n. Figures 433. Female paratype with newborns. Figures 434–440. Female holotype in vivo habitus (434), carapace and tergites I–III (435), coxosternal area and sternites III–IV (436), left legs I–IV, retrolateral aspect (437–440 respectively).

Figures 441–442: Scorpiops dunlopi sp. n., female paratype with juveniles after first ecdysis.

Figures 690–707: Comparison of three similar species Scorpiops neradi (690–691, 693, 697–698, 703, 705), S. schumacheri sp. n. (692–693, 695, 699–700, 704, 705), and S. dunlopi sp. n. (696, 701–702, 707). Figures 690–693, 697–702. Pedipalp chela dorsal and external views of males (690–693) and females (697–702). Figures 694–696. Movable finger dentition under UV light. Figures 703–707. Telson lateral views of males (703–704) and females (705–707).