Chaerilus Simon, 1877

Kovařík, František, Lowe, Graeme, Stockmann, Mark & Šťáhlavský, František, 2020, Two new Chaerilus from Thailand and Laos (Scorpiones: Chaerilidae), Euscorpius 324, pp. 1-20 : 1

Chaerilus Simon, 1877

( Figures 1–86 , Table 1 )

http://zoobank.org/urn:lsid:zoobank.org:act:52 CAD 12D- 165A-470D-BD01-9589DC5EFCB6

Chaerilus Simon, 1877: 238 ; Kovařík & Ojanguren, 2013: 131–145, figs. 617–776 (complete reference list until 2013); Kovařík et al, 2015: 1–21, figs. 1–91, tables 1–3; Kovařík et al., 2018: 1–27 , figs. 1–125, tables 1–2; Kovařík, 2019: 1–9 , figs. 1–58, table 1.

= Chelomachus Thorell, 1889: 583 (sYn. bY Kraepelin, 1899: 157).

= Uromachus Pocock, 1890: 250 (sYn. bY Kraepelin, 1899: 157).

TYPE SPECIES. Chaerilus variegatus Simon, 1877

DIAGNOSIS. Total length 16–80 mm; trichobothrial pattern orthobothriotaxic tYpe B; pedipalp femur d 3 –d 4 trichobothrial axis angled toward dorsoexternal carina; patella with 3 ventral trichobothria, femur with 9 trichobothria (4 dorsal); cheliceral fixed finger with median and basal denticles flush on surface, not fused into bicusp; ventral margin of cheliceral movable finger crenulated, dorsal margin with single subdistal denticle; ventral surface of cheliceral fixed finger with 4–8 denticles; sternum, type 1, exhibiting subtle, wide horizontal compression; lateral eYes usuallY composed of 2 large major ocelli, eYespot present; maxillarY lobes I spatulate; hemispermatophore fusiform; ovariuterus 6-celled, embrYonic development apoikogenic; lateral lYmphoid organs absent; stigmata oval or round; median denticle row (MD) of pedipalp chela finger arranged in oblique groups; pedipalp chela with 8-carina configuration; legs without tibial spurs, but with prolateral and retrolateral pedal spurs; tarsi of legs with 2–4 rows of ventral setae and a median row of spinules; fifth metasomal segment with a single ventral carina; telson without subaculear tubercle; sclerotized cuticle of integument with weak or no autofluorescence emission under ultraviolet (UV) excitation.

Figures

Figures 1–2. Chaerilus kautti sp. n., male holotYpe (1) and female paratYpe (2) in vivo habitus.

Figures 3–6: Chaerilus kautti sp. n. Figures 3–4. HolotYpe male, dorsal (3) and ventral (4) views. Figures 5–6. ParatYpe female, dorsal (5) and ventral (6) views. Scale bar: 10 mm.

Figures 7–14: Chaerilus kautti sp. n. Figures 7–8. HolotYpe male, carapace and tergites I–III (7), and sternopectinal region and sternites (8). Figures 9–14. ParatYpe female, carapace and tergites I–II (9), sternopectinal region and sternites (10), left legs I–IV, retrolateral aspect (11–14).

Figures 15–22: Chaerilus kautti sp. n. Figures 15, 20–22. HolotYpe male, telson lateral (15), metasoma and telson, lateral (20), ventral (21), and dorsal (22) views. Figures 16–19. ParatYpe female, telson lateral (16), metasoma and telson, lateral (17), ventral (18), and dorsal (19) views. Scale bars: 10 mm (17–19, 20–22).

Figures 23–32. Chaerilus kautti sp. n., holotYpe male, pedipalp chela, dorsal (23), externodorsal (24), and ventrointernal (25) views. Pedipalp patella, dorsal (26), external (27) and ventrointernal (28) views. Pedipalp femur and trochanter, dorsalointernal (29) and ventral (30) views. Movable (31) and fixed (32) fingers dentition. The trichobothrial pattern is indicated in Figures 23–29.

Figures 33–41. Chaerilus kautti sp. n., paratYpe female, pedipalp chela, dorsal (33), external (34), and ventrointernal (35) views. Pedipalp patella, dorsal (36), external (37) and ventral (38) views. Pedipalp femur and trochanter, dorsalointernal (39) and ventral (40) views. Movable finger (41) dentition.

Figures 42–43. Chaerilus kautti sp. n., paratYpe female, left chelicera dorsal (42) and ventral (43) views.

Figures 44–48: Chaerilus kautti sp. n. Figures 44–47. Hemispermatophores of holotYpe. Figures 44–45. Right hemispermatophore, posterior (44) and convex (45) views. Figure 46. Left hemispermatophore, convex view. Note: the fissure in the sperm hemiduct is damage from handling, not a natural feature. Figure 47. Right hemispermatophore, capsule and distal lamina, convex view, fine refractile structure visualized under Nomarksi illumination. Scale bars: 1 mm (44–46), 500 μm (47). Figure 48. TYpe localitY.

Figures 49–50. Chaerilus kautti sp. n., paratYpe female with newborns (40) and with juveniles after first ecdYsis (50) in vivo habitus.

Figure 51. Chaerilus pulcherrimus sp. n., holotYpe male in vivo habitus.

Figures 52–53. Chaerilus pulcherrimus sp. n., holotYpe male, dorsal (52) and ventral (53) views. Scale bar: 10 mm.

Figures 54–55. Chaerilus pulcherrimus sp. n., holotYpe male, carapace and tergites (54), and sternopectinal region and sternites (55).

Figures 56–62: Chaerilus pulcherrimus sp. n. Figure 56. ParatYpe female, telson lateral. Figures 57–62. HolotYpe male, telson lateral (57), metasoma and telson, lateral (58), dorsal (59), and ventral (60) views, left legs III–IV, retrolateral aspect (61–62). Scale bar: 5 mm.

Figures 63–71. Chaerilus pulcherrimus sp. n., holotYpe male, pedipalp chela, dorsal (63), externodorsal (64), and ventrointernal (65) views. Pedipalp patella, dorsal (66), external (67) and ventral (68) views. Pedipalp femur and trochanter, dorsalointernal (69) and ventral (70) views. Movable finger (71) dentition. The trichobothrial pattern is indicated in Figures 63–69.

Figures 72–79. Chaerilus pulcherrimus sp. n., paratYpe female, pedipalp chela, dorsal (72), external (73), and ventral (74) views. Pedipalp patella, dorsal (75), external (76) and ventral (77) views. Pedipalp femur and trochanter, dorsalointernal (78) view. Movable finger (79) dentition.

Figures 80–83. Chaerilus pulcherrimus sp. n., left hemispermatophore. Figures 80–83. Whole hemispermatophore in posterior (80), convex (81) and anterior (82) views. Figure 83. Capsule and distal lamina, convex view (compressed), fine refractile structure visualized under Nomarksi illumination. Scale bars: 400 μm (80–81, 82), 200 μm (83).

Figures 84–86: The chromosomes of Chaerilus species. Figure 84. C. kautti sp. n., meiotic metaphase I. Figures 85–86. C. pulcherrimus sp. n., mitotic metaphase (85) and meiotic metaphase I (86). Scale bar: 10 μm.