Podotarsonemus boliviensis Seeman, Lindquist & Husband, 2018

Seeman, Owen D., Lindquist, Evert E. & Husband, Robert W., 2018, A new tribe of tarsonemid mites (Trombidiformes: Heterostigmatina) parasitic on tetrigid grasshoppers (Orthoptera), Zootaxa 4418 (1), pp. 1-54 : 18-26

Podotarsonemus boliviensis Seeman, Lindquist & Husband sp. nov.

Figures 7–12 , 15A, B

Type material. Holotype. Adult female. BOLIVIA, Dept. Beni, Puertofonbeni, Luis E. Peña, 12 Nov. 1956, ex Batrachidea mucronata (Serville) (Tetrigidae) . G# 23, RWH 15I 2010 (slide 2). In UMMZ.

Paratypes. 20 females, 5 males, 11 larvae, as follows: 14 females, 4 males, 8 larvae, same data as holotype . 1 female, 1 male, same data as holotype except additional collection data “on way to Reyes from Rio Beni ″, 6–10 Nov. 1956 . 5 females, 3 larvae, Dept. La Laz, Altamarani on Beni River, Luis E. Peña, 5–11 Nov. 1956, ex B. mucronata . In UMMZ except 1 female, 1 male, 1 larva in each of CNCI and QM.

Non-type material. 1 adult female, same data as holotype, RWH 15I 2010 (slide 8)—aberrant specimen. 1 pharate female , 8 eggs, same data as holotype. In UMMZ .

Diagnosis. Female and male: Palps with 1 seta; chelicera with 1 tooth (female) or without teeth (male); prodorsal plate with imbricate sculpturing; femora I–II with rudimentary seta lʹ, d; genua II–III bare; tarsi II–III with 4 setae, lacking seta u″ (except male tarsus III with 5 setae, u″ present); trochanter IV bare. Female: Setae sc1 present; vestigial setae v2 expressed as alveoli within prodorsal shield; coxisternal plates III–IV separated by soft cuticle; setae h attenuate,> 70 long; femorogenu IV with 2 setae; tracheal atria separate, post-atrial sac lightly sclerotized, not punctate. Male: Genital capsule with small copulatory flanges; setae h1 rudimentary, like h2; femorogenu IV with 1 seta; tibia IV with solenidion, without setae; tarsus IV absent. Male and larva: Leg I with tibia and tarsus fused. Larva: Setae h1-2, ps1-2 attenuate; leg I without claws.

Description. ADULT FEMALE ( Figures 7–8 , 15A, B, n = 11 measured)

Measurements are in the form of: Range [Measurement of aberrant specimen if outside of range].

Gnathosoma . Length 51–63, width 59–66 [69]. Palps 9–14, with 1 apical seta 7–9 flanked medially by pointed triangular hyaline process. Cheliceral stylets 1 9–23, each with 1 tooth. Pharynx length 26–42, width 19–25. Dorsal setae ch 25–34, ventral setae su 8–23 [30], palpcoxal setae e 7–13.

Idiosoma . Length 228–245, width 159–198. Tracheal atria separate, post-atrial sac lightly sclerotized, not punctate, terminal tracheae separate. Prodorsal plate with imbricate sculpturing, irregular anteriorly [similar, but smooth between sc2-sc2], 91–106 long, 140–163 wide; with 3 pairs of setae: v 1 20–26 [29] with few barbs, sc 1 5– 22 variable, mostly 5–6, but 14 and 22 in two specimens, sc2 47–75 [100] and vestigial v2. Distance between setae v1-v1 46 –56 [45], v2-v2 56 –64 [68], sc1-sc1 120–131 [110], sc2-sc2 67– 82, v1 -sc 2 26–32. Plates C, D, EF with imbricate sculpturing [similar, but smooth between c1-c1]. Setae c1, d, e, f with few barbs [many barbs], c 1 15–23 [37], c2 44–54 [> 100], d 15–22 [33], e 15–22 [25], f 15–22. Distance between setae c1-c1 109–123 [95], c2-c2 154–170, c1-c 2 23–30, d-d 82–96 [68], e-e 71–80, f-f 36–50 [31]. Plate H folded beneath EF, setae h attenuate,> 130. Distance between setae h-h 26–37. Cupules ia, im, ih present. Setae ps attenuate> 130, distance between setae ps-ps 10–13 [14]. Coxisternal setae attenuate, 1a 90 (often broken), 2a 96–135 (often broken), 3a> 250, 3b> 210. Distance between setae 1a-1a 21–28 [31], 2a-2a 33–47 [57], 3a-3a 18–31 [11], 3b-3b 33–50 [55]; alveolar vestiges of setae 1b and 2b present.

Legs. Leg lengths: I 55 –60 [75], II 51 –56 [74], III 53 –55 [78]. Leg IV Fe-Ge length 25–29, Ti-Ta length 18–21. Leg III, femur and genu fused. Femur I, lʹ, lʹʹ, d rudimentary [lʹʹ 2], vʹʹ 12–21 [27]; genu I lʹ 4–9 [14], lʹʹ 6–10, vʹ 4– 5 [9], vʹʹ 4–6 [9]; tibia and tarsus I fused, tibial setae d 28–41, lʹ 4–9 [15], l″ 3 [5], vʹ 5–9 [15], vʹʹ 8–13 [14], solenidion φ 3–4 [6], tarsal setae tcʹ 15 [17], tcʹʹ 13–15 [17], pvʹ 9–15, pvʹʹ 6–10 [17], s spine-like, 5–9, solenidion ω 8–11.

Femur II lʹ, d rudimentary, vʹʹ 7–19 [24]; tibia II d 30–39, lʹ 8–21 [22], vʹ 7–24 [38], vʹʹ 19–33 [35]; tarsus II pvʹ 12–16 [22], tcʹ 19–22 [25], tcʹʹ 27–45, uʹ spine-like, 6–10, solenidion ω 8–12.

Tibia III d 23–38 [40], lʹ 11–15 [30], vʹ 17–33, vʹʹ 25–31 [34]; tarsus III pvʹ 11–24, tcʹ 21–29 [31], tcʹʹ 26–46, uʹ spine-like, 8–9.

Femorogenu IV with 2 attenuate ventral setae (Fe- vʹ, Ge- vʹ); proximal femoral seta 18–25 [36], distal genual seta 36–45 [28]; tibiotarsus with attenuate ventral tibial seta and terminal tarsal seta> 100.

ADULT MALE ( Figs 9–10 , n = 2 measured)

Gnathosoma . Similar to female. Length 33–36, width 35–36. Palps 10–12. Cheliceral stylets 15–17, without teeth. Pharynx length 20–22, width 10–11. Dorsal setae 10–12, ventral setae 7–10, palpcoxal setae 2–3.

Idiosoma . Length 165–175, width 140. Prodorsal plate punctate, 65–73 long, 105–110 wide; with 3 pairs of setae (v 1 16–17, sc1 4–5, sc2 39–42) and vestigial v2. Distance between setae v1-v 1 29–31, v2-v 2 30–34, sc1-sc1 72–75, sc2-sc2 41– 44, v1 -sc2 41–43. Plates CD, EF punctate. Setae smooth, setae c1 6–7, c 2 25–26, d 35–40 (left side d 8 on one specimen); setae c1 obliquely aligned between setae c2 and d. Plate EF, e 5, f 6. Distance between setae c1-c1 75, c2-c2 100–115, c1-c 2 28–32, d-d 26–27, e-e 36–37, f-f 29–30. Cupules ia, im present. Genital capsule 30–35 long, 32 wide, bearing alveolar remnants of h1, h2; ventral flanges present, small. Coxisternal setae attenuate, 1a 28, 2a 70, 3a> 90, 3b> 80. Distance between setae 1a-1a 13–15, 2a-2a 38–40, 3a-3a 10–13, 3b-3b 37–40; setae 1a at level of or just posterior to ap1, setae 2b at level of or just posterior to ap2. Apodemes: ap2 not reaching medially obsolete ap sj; ap5 small, extending 17–21 from base, not fused medially.

Legs. Leg lengths: I 47, II 46, III 45, IV 30–31. Leg III, femur and genu fused.

Femur I, lʹ, lʹʹ, d rudimentary, lʹʹ on small tubercle, vʹʹ 8–10; genu I lʹ 2–3, lʹʹ 4–5, vʹ 3, vʹʹ 2–3; tibia and tarsus I fused, tibial setae d 23–25, lʹ 4, lʹʹ 2–3, vʹ 6–7, vʹʹ 10–15, solenidion φ 3–4, tarsal setae ftʹ 12, ftʹʹ 12, tcʹ 11–12, tcʹʹ 9– 11, pvʹ 9–11, pvʹʹ 9–11, s spine-like, 8, solenidion ω 9–10.

Femur II lʹ, d rudimentary, vʹʹ 7–11; tibia II d 20–22, lʹ 6–9, vʹ 12–16, vʹʹ 15–22; tarsus II pvʹ 5–7, tcʹ 10–16, tcʹʹ 25–28, uʹ spine-like, 8–9, solenidion ω 10.

Tibia III d 22, lʹ 9, vʹ 20, vʹʹ 24; tarsus III pvʹ 7, tcʹ 22–25, tcʹʹ 24–30, uʹ spine-like, 8–9, uʹʹ 7.

Trochanter IV bare; femorogenu IV vʹ 4–5, tibia IV solenidion φ 7; tarsus IV absent.

LARVA ( Figs 11–12 , n = 4)

Gnathosoma . Length 39–50, width 37–47. Palps 8–10. Cheliceral stylets 15–19, without teeth. Pharynx length 21–34, width 12–16. Dorsal setae 16–18, ventral setae 10–19.

Idiosoma . Length 249–283, width 140–194. Prodorsal plate smooth, 66–70 long, 98–114 wide; with 3 pairs of weakly barbed setae (v 1 14–17, sc1 7–9, sc 2 20–27) and vestigial v2. Distance between setae v1-v 1 25–38, v2-v2 37 –48, sc1-sc1 67–84, sc2-sc2 40– 48, v1 -sc2 50–55. Plates C, D, EF smooth. Setae weakly barbed, c 1 10–13, c 2 11–14, d 10–12, e 7–12, f 8–12. Distance between setae c1-c1 65–86, c2-c2 131–138, c1-c 2 30–35, d-d 48–53, e-e 42–51, f-f 20–26. Plate H smooth, setae h1 attenuate,> 100, h2 ventral,> 50. Distance between setae h 1 27–39. Cupules ia, im, ih present. Setae ps1-2 attenuate, ps1> 40, ps2> 100. Coxisternal setae attenuate, 1a 18–34, 2a 20– 32, 3a> 190, 3b> 110. Distance between setae 1a-1a 21–24, 2a-2a 39–52, 3a-3a 44–54, 3b-3b 60–64.

Legs. Femur I, lʹ, lʹʹ, d rudimentary, vʹʹ 11–15; genu I lʹ 2–5, lʹʹ 4–5, vʹ 3–4, vʹʹ 3–4; tibia and tarsus I fused, tibial setae d 15–26, lʹ 3–4, lʹʹ 2–4, vʹ 5–6, vʹʹ 6–8, solenidion φ 3–4, tarsal setae tcʹ 9–12, tcʹʹ 9–12, pvʹ 5–11, pvʹʹ 5–8, s spine-like, 6–7, solenidion ω 6–7.

Femur II lʹ, d rudimentary, vʹʹ 7–10; tibia II d 13–20, lʹ 8–13, vʹ 10–13, vʹʹ 12–16; tarsus II tcʹ 15, tcʹʹ 24–30, pʹ 6–7, uʹ spine-like, 6–7, solenidion ω 4–5.

Tibia III d 12–15, lʹ 5–8, vʹ 12–14, vʹʹ 20–23; tarsus III tcʹ 15–19, tcʹʹ 30–57, pʹ 5–6, uʹ spine-like, 6–7, uʹʹ rudimentary. Leg I without claws.

Etymology. The species name boliviensis refers to the country where the type specimens were collected.

Differential diagnosis. Adults of Podotarsonemus boliviensis are very similar to those of Podotarsonemus ecuadorensis but can be distinguished by the following character states. Female P. boliviensis has extensive imbricate sculpturing on the dorsal plates, has a cheliceral tooth and lacks seta uʹʹ on tarsus II. In contrast, female P. ecuadorensis has smooth dorsal plates, lacks cheliceral teeth and has seta uʹʹ on tarsus II. Male P. boliviensis and P.

ecuadorensis are easily distinguished by several characters: P. boliviensis is the only Podotarsonemus with copulatory flange remnants on the genital capsule; P. boliviensis has vʹ on femorogenu IV and lacks setae v ′ and vʹʹ on tibia IV (absent and present, respectively, in P. ecuadorensis ); P. boliviensis has a shorter solenidion on tibia IV (7 vs 10–12); P. boliviensis lacks seta uʹʹ on tarsus II (present in P. ecuadorensis ) and retains seta uʹʹ on tarsus III (absent in P. ecuadorensis ); and setae e-e and f-f are placed closer: e -e 36–37 vs 18, f-f 29–30 vs 9.

Remarks. Among the Bolivian specimens, one female (considered in the description as the aberrant specimen) has a similar body size but has numerous measurements that are generally greater than the ranges recorded for the type series. For example, its body setae are longer dorsally: v1 (29 vs 20–21), sc2 (100 vs 50–75), c1 (37 vs 15–18), c2 (> 100 vs 44–54), d (33 vs 15–20), e (25 vs 15–8), but shorter ventrally, 1a (21 vs attenuate> 35), 2b (35 vs attenuate> 60). Its leg setae are also longer: Leg I—Fe lʹʹ (2 vs rudimentary), Fe vʹʹ (27 vs 12–21), Ge lʹ (14, 5–9), Ge vʹ (9 vs 4–5), Ti lʹ (15 vs 4–7), Ti vʹ (15 vs 5–9), Ti φ (6 vs 3–4); Leg II—Ti lʹ (22 vs 8–11), Ti vʹ (38 vs 18–24); Leg III—Ti lʹ (30 vs 11–15). However its distances between some body setae are shorter: d -d (68 vs 82–91), f -f (31 vs 39–50). This specimen also has imbricate sculpturing only behind sc2-sc2, c1-c1 and d -d.

Figures

FIGURE 7. Podotarsonemus boliviensis sp. nov. adult female, dorsum.

FIGURE 8. Podotarsonemus boliviensis sp. nov. adult female, venter.

FIGURE 9. Podotarsonemus boliviensis sp. nov. adult male, dorsum.

FIGURE 10. Podotarsonemus boliviensis sp. nov. adult male, venter.

FIGURE 11. Podotarsonemus boliviensissp. nov. larva, dorsum.

FIGURE 12. Podotarsonemus boliviensis sp. nov. larva, venter.

FIGURE 15. Podotarsonemus boliviensis sp. nov. female. (A, B) respiratory system; (D) Plates C and D, aberrant specimen. Podotarsonemus ecuadorensis sp. nov. (C) respiratory system.st = stigmata, at = atrium, pa = post-atrial chamber.