Podotarsonemus queenslandensis 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 : 40

Podotarsonemus queenslandensis Seeman, Lindquist & Husband sp. nov.

Figures 23–24

Type material. Holotype. Adult female. AUSTRALIA, Split Rock, 14 km SW of Laura, Far North Queensland, 23–26 Jun 1975, GB Monteith, ex Hedotettix amplus (Sjöstedt) (Tetrigidae) ( Fig. 29B ). In QM.

Paratypes. 9 females, same data as holotype . In QM except 1 female in each of CNCI and UMMZ.

Diagnosis. Female: Palps with 1 seta; chelicerae with 1 weak tooth; prodorsal plate with imbricate sculpturing behind setae sc2; setae sc1 absent; vestigial setae v2 expressed as anterolateral invaginations; femora I–II without seta lʹ, d; genua II–III bare; tarsi II–III with 5 setae, seta uʹʹ present; trochanter IV without seta; coxisternal plates III–IV separated by soft cuticle; setae h attenuate,> 150 long; femorogenu IV with 2 setae; tracheal atria separate, post-atrial sac lightly sclerotized, not punctate.

Description. ADULT FEMALE ( Figures 23–24 , n = 10 measured)

Gnathosoma . Length 46–49, width 42–47. Palps 8–11, with 1 seta (5 long). Cheliceral stylets 16–19, each with 1 weakly formed tooth. Pharynx length 31–34, width 15–16. Dorsal setae ch 15–22, ventral setae su 15–23, palpcoxal setae e 11–13.

Idiosoma . Length 200 (physogastric 525), width 130–140. Tracheal atria separate, post-atrial sac lightly sclerotized, not punctate, with two small distal prongs indicating separate tracheae. Prodorsal plate 78–83 long, 102–114 wide, with punctate sculpturing anteriorly, imbricate sculpturing posterior to sc2; with 2 pairs of setae: v 1 16–18, thickened, with small barbs, sc2 57–64, attenuate, and vestigial v2 expressed as anterolateral invaginations. Distance between setae v1-v 1 31–35, v2-v2 49, sc2-sc2 55– 60, v1 -sc 2 18–23. Plates C, D with punctate sculpturing anteriorly, imbricated posteriorly, EF, H with punctate sculpturing, H heavily so. Setae c1, d, e, f thickened, with small barbs, c 1 15–18, c 2 30–36, d 13–15, e 10–13, f 11–13. Distance between setae c1-c1 66–91, c2-c2 120–150, c1-c 2 25–31, d-d 50–59, e-e 45–49, f-f 25–30. Setae h attenuate,> 140. Distance between setae h-h 21–28. Cupules ia, im present, ih indiscernible. Setae ps attenuate 260, distance between setae ps-ps 8–10. Coxisternal setae attenuate, 1a 8–10, 2a 15–22, 3a> 130, 3b> 90. Distance between setae 1a-1a 19–20, 2a-2a 40–41, 3a-3a 9–18, 3b-3b 26; alveolar vestiges of setae 1b, 2b present.

Legs. Leg lengths: I 45 –47, II 46 –48, III 46 –47. Leg IV Fe-Ge length 18–20, Ti-Ta length 17–18. Leg III, femur and genu fused.

Femur I lʹʹ 3–5, vʹʹ 13–18; genu I lʹ 7–12, lʹʹ 6–8, vʹ 4–5, vʹʹ 5–7; tibia and tarsus I fused, tibial setae d 17–20, lʹ 6–7, lʹʹ 5–6, vʹ 6–8, vʹʹ 7–13, solenidion φ 3–4, tarsal setae tcʹ 10–11, tcʹʹ 10–12, pvʹ 9–10, pvʹʹ 7–8, s spine-like, 6– 7, solenidion ω 7.

Femur II vʹʹ 11–15; tibia II d 15–18, lʹ 9–11, vʹ 13–16, vʹʹ 13–17; tarsus II tcʹ 12–14, tcʹʹ 16–21, pvʹ 12–14, uʹ spine-like, 7, uʹʹ 1, solenidion ω 4–6.

Tibia III d 19–26, lʹ 13–15, vʹ 11–15, vʹʹ 14–19; tarsus III tcʹ 17–19, tcʹʹ 16–17, pvʹ 16–17, uʹ spine-like, 6–7, uʹʹ 1.

Femorogenu IV with 2 setae, proximal femoral seta 20–23, distal genual seta 40–47; tibiotarsus with attenuate ventral tibial seta> 80 and terminal tarsal seta> 210.

ADULT MALE—Unknown

LARVA—Unknown

Etymology. The species name queenslandensis refers to the state (Queensland, Australia) where the type specimens were collected.

Remarks. The female of Podotarsonemus queenslandensis is most similar to that of P. nipponicus and can be distinguished in the Differential diagnosis for that species.

Figures

FIGURE 23. Podotarsonemus queenslandensis sp. nov. female. (A) dorsum; (B) respiratory system. at = atrium, pa = postatrial chamber.

FIGURE 24. Podotarsonemus queenslandensis sp. nov. female. (A) tibiotarsus I, dorsal view; (B) tibiotarsus I, ventral view; (C) tarsus II, dorsal view; (D) tarsus II ventral view; (E) gnathosoma, ventral view; (F) palp, detail of another specimen.

FIGURE29.Lateral habitus photographs of tetrigid grasshopper hosts (antennae broken inboth specimens).(A) Loxilobus sp., type host specimen for Podotarsonemus australiensis sp. nov. (B) Hedotettix amplus (Sjöstedt), type host specimen for Podotarsonemus queenslandensis sp. nov.