Hoplocheylus magnificus Khaustov, sp. nov.
Creators: name: Khaustov, Alexander A.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Tarsocheylidae
Hoplocheylus
Hoplocheylus magnificus

description: Hoplocheylus magnificus Khaustov sp. nov.
(Figs. 1–16, 20 A)
Description. LARVA (Figs. 1–3, 14, 20 A). Body weakly sclerotized. Length of idiosoma 280–285, length of body including gnathosoma 320–325, width 110–115. Gnathosoma (Figs. 1–2, 14 B, C). Setae cha (10–11) blunt-ended situated at posterior half of chelicerae, and pointed chb (9–10) situated near anterior margin of chelicera. Setae dFe and dGe of femurogenu weakly barbed. Tibiotarsus with large tibial claw bearing tiny subterminal process; Eupathidia ul’ and ul” represented by duplex of setae. Subterminal processes dome-like, fused at base. Subcapitulum setae m (21–23) slightly shorter than n (28–32). Adoral setae absent. Hypostome with 1pair of short spine-like hypostomal papillae (Figs. 14 C). Length of palps 44–45. Pharynx long, weakly sclerotized, with lateral processes (Fig. 20 A). Idiosomal dorsum (Fig. 1 A). Prodorsum with large, weakly sclerotized smooth prodorsal shield. Setae v 2 and sc 1 blunt-ended and weakly barbed. Setae c 1, d and e blunt-ended, other hysterosomal setae pointed. Setae c 2 smooth, other hysterosomal setae weakly barbed. Lengths of dorsal setae: v 1 26–30, v 2 10–11, sc 1 10–11, sc 2 39–41, c 1 18–19, c 2 51–55, d 19–20, e 19–20, f 46–48, h 1 47–49, h 2 41–44. Idiosomal venter (Figs. 1 B, 14A). Large rectangular midsternal plate situated in the space between coxal fields II and III. Aggenital plate with deep incision on posterior margin. Pseudanal segment with setae ps 2 distinctly longer than ps 1 and ps 3. Lengths of ventral setae: 1 a 14–15, 1 b 12–13, 2 a 15–16, 2 b 20–21, 3 a 14–15, 3 b 15–16, ps 1 12–14, ps 2 25–29, ps 3 13–14. Legs (Figs. 2, 14 D). Lengths of legs: I 110–115, II 74 –78, III 95 –97. Leg I (Figs. 2 A, 14D). Leg setation: Tr 0, Fe 5 (d, l’, l”, v’, bv”), Ge 5 (d, l’, l”, v’, v”), Ti 6(1) (φ 1, k, d, l’, l”, v’, v”), Ta 11(1) (ω 1, tc’, tc”, ft’, ft”, u’, u”, s, pl’, pl”, pv’, pv”). Setae (tc) are eupathidia. Solenidion ω 1 (11–12) finger-shaped, reaching beyond tip of tarsus. Solenidion φ 1 (8) clavate. Setae v’ of femur, genu and tibia blunt-ended. Leg II (Fig. 2 B). Leg setation: Tr 0, Fe 3 (d, l’, bv”), Ge 4 (l’, l”, v’, v”), Ti 5(1) (φ, d, l’, l”, v’, v”), Ta 8(1) (ω, pl”, p’, tc’, tc”, u’, u”, pv’, pv”). Solenidion ω 6 long, finger-shaped. Solenidion φ 1 4 long, clavate. Setae l’ of femur and v’ of genu blunt-ended. Seta p’ slightly bifurcate distally. Leg III (Fig. 2 C). Leg setation: Tr 0, Fe 2 (d, v’), Ge 4 (l’, l”, v’, v”), Ti 5(1) (φ, d, l’, l”, v’, v”), Ta 8 (pl”, p’, tc’, tc”, u’, u”, pv’, pv”). Solenidion φ 1 3 long clavate. Seta p’ slightly bifurcate distally.
PROTONYMPH (Figs. 3–5). Length of idiosoma 345–350, length of body including gnathosoma 405–430, width 115–130. Gnathosoma as in larva, except presence of short 3 long blunt-ended adoral setae or situated in distal half of subcapitulum. Lengths of gnathosomal setae: cha 11–12, chb 9–11, m 22–24, n 33–34. Length of palps 52–54. Idiosomal dorsum (Fig. 3 A) as in larva, but setae ps 1 situated dorsally and h 2 blunt-ended and distinctly shorter than h 1. Lengths of dorsal setae: v 1 32 –33, v 2 12–13, sc 1 10–11, sc 2 47–49, c 1 19–20, c 2 57–66, d 19–20, e 20–21, f 45–50, h 1 47–51, h 2 27–28. Idiosomal venter (Fig. 3 B). Setae 1 c and 2 b pointed, other setae of coxal fields I and II needle-like. Aggenital plate almost round, with narrow incision on posterior margin and bearing pair of setae ag 2. Setae ps 3 needle-like and distinctly shorter than ps 1-2. Lengths of ventral setae: 1 a 10–11, 1 b 10–11, 1 c 17–18, 1 d 12–13, 2 a 14–15, 2 b 23–25, 2 c 18–21, 3 a 15–16, 3 b 15–16, 3 c 14–16, 4 a 9–11, ag 1 11–13, ps 1 40–42, ps 2 35–37, ps 3 15–16. Legs (Figs. 4–5). Lengths of legs: I 135–140, II 85 –89, III 100–105, IV 110–115. Leg I (Fig. 4 A). Leg setation similar with that of larva, except presence of small clavate solenidion ω 2 in basal half of tarsus, presence of finger-shaped solenidion φ 2 near distal end of tibia, and presence of setae bl’ on tarsus. Lengths of solenidia: ω 1 11–12, ω 2 3–4, φ 1 9–10, φ 2 6–7. Leg II (Fig. 4 B) as in larva. Lengths of solenidia: ω 6–7, φ 3–4. Leg III (Fig. 5 A) similar with that of larva, except presence of seta l’ on trochanter. Solenidion φ 3–4 long. Leg IV (Fig. 5 B). Leg setation: Tr 0, Fe 0, Ge 0, Ti 5 (d, l’, l”, v’, v”), Ta 5 (p’, tc”, u’, u”, pv’). Seta p’ slightly bifurcated distally.
DEUTONYMPH (Figs. 6–8). Length of idiosoma 425–430, length of body including gnathosoma 490–495, width 135–145. Weak border present between palpfemur and palpgenu laterally. Lengths of gnathosomal setae: cha 11–12, chb 11–12, m 33–37, n 38–40, or 4. Length of palps 68–71. Idiosomal dorsum (Fig. 6 A) as in protonymph. Lengths of dorsal setae: v 1 37 –38, v 2 12–13, sc 1 12–13, sc 2 58–59, c 1 22–24, c 2 68–70, d 23–25, e 24–25, f 55–58, h 1 53–57, h 2 29–31. Idiosomal venter (Fig. 6 B). Coxal fields IV with 1 needle-like setae 4 b. Lengths of ventral setae: 1 a 10–12, 1 b 11–13, 1 c 20–22, 1 d 12–13, 2 a 14–16, 2 b 30–32, 2 c 21–24, 3 a 15–18, 3 b 16–17, 3 c 17–18, 4 a 11–13, 4 b 9–10, ag 1 13–16, ag 2 13–14, ag 3 13–14, g 1 7–8, g 2 6–7, ps 1 56–58, ps 2 46–47, ps 3 19–20. Legs (Figs. 7–8). Lengths of legs: I 160–175, II 100–105, III 115–120, IV 135–140. Leg I (Fig. 7 A) similar with that of protonymph except presence of setae v’ on trochanter. Lengths of solenidia: ω 1 12–13, ω 2 4–5, φ 1 10–11, φ 2 7–8. Leg II (Fig. 7 B) similar with that of protonymph except presence of setae v’ on trochanter. Lengths of solenidia: ω 7–8, φ 4. Leg III (Fig. 8 A) similar with that of protonymph except presence of setae v’ on trochanter. Solenidion φ 4 long. Leg IV (Fig. 8 B). Leg setation: Tr 0, Fe 2 (d, v’), Ge 5 (d, l’, l”, v’, v”), Ti 5 (d, l’, l”, v’, v”), Ta 7 (p’, tc’, tc”, u’, u”, pv’, pv”). Seta v’ of genu blunt-ended.
FEMALE (Figs. 9–12, 15, 16). Length of idiosoma 470 (470–480), length of body including gnathosoma 560 (550–580), width 160 (155–170). Gnathosoma (Figs. 10, 15 C–F, 16A, B) as in deutonymph, but more strongly sclerotized. Palps as in Figs. 10, 15 E, F. Lengths of gnathosomal setae: cha 16 (16–17), chb 17 (17–18), m 28 (35–41), n 55 (53–58), or 5 (5). Palp 100 long (94–105). Idiosomal dorsum (Figs. 9 A, 15A). Stigmata prominent (Fig. 16 D) associated with long tracheal trunks. Prodorsal shield with numerous small round dimples and distinct ω-like apodeme in posterior half. Lengths of dorsal setae: v 1 50 (48–55), v 2 22 (21–23), sc 1 26 (25–27), sc 2 72 (66– 85), c 1 32 (30–34), c 2 93 (85–105), d 33 (31–36), e 34 (31–38), f 71 (57–79), h 1 77 (69–83), h 2 40 (38–44). Idiosomal venter (Figs. 9 B, 15B). Coxal fields I–III as in deutonymph. Weakly sclerotized apodemes 4 (ap4) and 5 (ap5) present between coxal fields III and IV and near posterior margin of coxal fields IV, respectively. Pseudanal segment as in deutonymph. Lengths of ventral setae: 1 a 15 (14–16), 1 b 14 (13–15), 1 c 35 (31–40), 1 d 17 (16–18), 2 a 20 (19–22), 2 b 49 (39–55), 2 c 34 (32–36), 3 a 23 (21–25), 3 b 27 (23–31), 3 c 24 (22–26), 4 a 17 (16–18), 4 b 13 (10–15), 4 c 14 (12–16), ag 1 20 (16–23), ag 2 20 (18–22), ag 3 21 (18–23), g 1 12 (11–13), g 2 11 (10–13), g 3 11 (10– 12), g 4 13 (12–14), ps 1 76 (66–84), ps 2 60 (53–66), ps 3 26 (24–28). Legs (Figs. 11, 12, 16 E, F). Lengths of legs: I 200 (185–210), II 125 (115–130), III 140 (130–150), IV 180 (170–190). Leg I (Figs. 11 A, 16E) similar with that of deutonymph. Lengths of solenidia: ω 1 13 (13–14), ω 2 5 (4–5), φ 1 10 (9–11), φ 2 8 (8–9). Leg II (Figs. 11 B, 16F) similar with that of deutonymph. Lengths of solenidia: ω 10 (9–10), φ 5 (4–5). Leg III (Fig. 12 A) similar with that of deutonymph. Solenidion φ 5 long (5–6). Leg IV (Fig. 12 B) similar with that of deutonymph, but trochanter with seta v’.
MALE (Fig. 13). Length of idiosoma 525, length of body including gnathosoma 617, width 180. Palp 93 long. Lengths of dorsal setae: v 1 50, v 2 25, sc 1 23, sc 2 68, c 1 33, c 2 78, d 35, e 37, f 75, h 1 68, h 2 43. Lengths of ventral setae: 1 a 15, 1 b 15, 1 c 35, 1 d 15, 2 a 20, 2 b 48, 2 c 34, 3 a 24, 3 b 27, 3 c 24, 4 a 18, 4 b 13, 4 c 14, ag 1 20, ag 2 20, ag 3 22, g 1 11, g 2 11, g 3 11, g 4 12, ps 1 63, ps 2 58, ps 3 28. Lengths of legs: I 200, II 125, III 140, IV 170.
Type material. Female holotype, slide AY 051014, RUSSIA, Kurgan Province, Shatrovskiy district, vicinity of settlement Shatrovo, spruce forest, in the nest of the ant Formica rufa L., 56o30’1.95” N, 64o38’53.76” E, 5 October 2014, coll. A.Yadryshnikov; paratypes: one male, 12 larvae, ten ptotonymphs, eight deutonymphs, 130 females, same data as holotype.
Type deposition. The holotype, one male paratype and 90 female paratypes are deposited at the Zoological Institute of the Russian Academy of Sciences, St.-Petersburg, Russia; other paratypes—at the acarological collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.
Etymology. The species name is derived from the Latin word magnificus meaning magnificent and refers to a large and impressive body size of the new species.
Differential diagnosis. The new species is most similar to Hoplocheylus pickardi Smiley and Moser, 1968 by the absence of a solenidion on tibia IV, position of setae 4 a and ag 1 on the plates, solenidion ω 1 distinctly longer than ω 2,and by setae p’ on tarsi II–IV distally bifurcated. The new species differs from H. pickardi by solenidion ω 1 reaching distinctly beyond the tip of tarsus I (in H. pickardi solenidion ω 1 reaching to the tip of tarsus I) and by the presence of 14 setae (excluding solenidia) on tarsus I (in H. pickardi tarsus I with 13 setae).
description: Published as part of Khaustov, Alexander A., 2015, To systematics of the mite genus Hoplocheylus (Acariformes: Tarsocheylidae), pp. 277-299 in Zootaxa 3957 (3) on pages 278-291, DOI: 10.11646/zootaxa.3957.3.2, http://zenodo.org/record/232252