Euscorpius Thorell, 1876

Kovařík, František, Lowe, Graeme, Byronová, Markéta & Šťáhlavský, František, 2020, Euscorpius thracicus sp n (Scorpiones: Euscorpiidae) from Bulgaria, Euscorpius 326, pp. 1-17 : 3

Euscorpius Thorell, 1876

( Figures 1–61 , Tables 1–2 )

http://zoobank.org/urn:lsid:zoobank.org:act:CEC71123- 0F84-45DD-857E-2D4702C2FD80

Euscorpius Thorell, 1876: 15 ; Fet & Sissom, 2000: 357–377 (in part, complete reference list until 1998); KovařÍk & Šťáhlavský, 2020: 1–37, figs. 1–186, tabs. 1–4.

TYPE SPECIES. Scorpio carpathicus Linnaeus, 1767

DIAGNOSIS. Total length 20–50 mm. Movable fingers of pedipalp chela with MD aligned in a single straight row along entire length of chela fingers; ID, IAD (5 in number) and OD present. OD are displaced to outer aspect of fingers. Pedipalp chela flat in appearance. Trichobothrial pattern type C. Two subdistal denticles present on cheliceral movable finger dorsal edge. Ventral edge of cheliceral movable finger smooth; serrula absent. Two pedal spurs present on legs. Tarsal spurs on legs absent. Sternum pentagonal in shape. Hemispermatophore lamelliform in shape with broad trunk and distal lamina. Telson without subaculear tubercle. Metasoma I–IV with single median carina usually absent.

Figures

Figures 1–2. E. thracicus sp. n., male (1) and female (2) paratypes in vivo habitus.

Figures 3–6: E. thracicus sp. n. Figures 3–4. Male holotype in dorsal (3) and ventral (4) views. Figures 5–6. Female paratype in dorsal (5) and ventral (6) views. Scale bar: 10 mm.

Figures 7–16: E. thracicus sp. n. Figures 7, 9, 11–15. Male holotype, carapace and tergites I–IV (7), coxosternal area (9), left legs I–IV, retrolateral aspect (11–14 respectively), and telson lateral (15). Figures 8, 10, 16. Female paratype, carapace and tergites I–III (8), coxosternal area and sternites III–IV (10), and telson lateral (16).

Figures 17–22: E. thracicus sp. n. Figures 17–19. Female paratype, metasoma and telson lateral (17), ventral (18), and dorsal (19) views. Figures 20–22. Male holotype, metasoma and telson lateral (20), ventral (21), and dorsal (22) views. Scale bars: 10 mm (17–19, 20–22).

Figures 23–31. E. thracicus sp. n., male holotype, pedipalp segments. Chela dorsal (23), external (24) and ventral (25) views. Patella dorsal (26), external (27) and ventral (28) views. Trochanter and femur dorsal (29) and ventral (30) views. Movable finger dentition (31).

Figures 32–39. E. thracicus sp. n., female paratype, pedipalp segments. Chela dorsal (32), external (33) and ventral (34) views. Patella dorsal (35), external (36) and ventral (37) views. Trochanter and femur dorsal (38) and ventral (39) views. Trichobothrial pattern is indicated by white circles (32–38).

Figures 40–43. Chromosomes of E. thracicus sp. n., karyotype based on postpachytene (2n=92) (40), mitotic metaphase (41), postpachytene (42), one sister metaphase II (n=46) (43). Scale bars: 10 μm.

Figures 44–49. Euscorpius thracicus sp. n., left hemispermatophore. Figures 44–45. Whole hemispermatophore in convex (44) and concave (45) views. Figures 46–49. Capsule of left hemispermatophore, 3-dimensional form displayed in cross stereoscopic pairs, in posterior-convex (46), anterior (47), convex (48) and concave (49) views. Paratype No. 1864. Scale bar: 1 mm (Figs. 44–49).

Figures50–58. Comparison of the capsule lobesof the hemispermatophoresof nine euscorpiids (anterior-convexviews).50. Tetratrichobothrius flavicaudis. 51. Euscorpius sp., nr tergestinus. 52. E. concinnus. 53. E. solegladi. 54. E. italicus. 55. E. deltshevi. 56. E. sicanus. 57. E. candiota. 58. E. thracicus sp. n., paratype No. 1864 Abbreviations: lde: distal external lobe; ldi: distal internal lobe; bl: basal lobe; cls: crownlike structure. Capsules of left hemispermatophores shown except for Fig. 57, which shows the right capsule (in mirror image for comparison). Scale bar: 500 μm (in Fig. 56) applies to Figs. 50–58.

Figures 59–60. E. thracicus sp. n., type locality, Bulgaria, Krumovgrad, Bryagovets, 41.6485862°N 25.8132185°E.

Figure 61. Map of distribution of Euscorpius populations analysed by DNA (see Table 2).