Eutarsopolipus basiatus, Seeman, 2021

Seeman, Owen D., 2021, Contrasting species diversification of Eutarsopolipus (Acariformes: Podapolipidae) on Castelnaudia and Notonomus (Coleoptera: Carabidae), Zootaxa 4971 (1), pp. 1-74 : 42-48

Eutarsopolipus basiatus sp. nov.

( Figs 28–31 )

Diagnosis. Adult female: sc1 5–7, c1 6–9, c2 9–14, d 7–9, f 6–7, v2-v2 48–62, sc1-sc1 36-46, d-d 91–115, f-f 76–92; genua II-III setae l′ 3–4, tibia I setae l′ 4–6, v′ 5–6, tarsi II-III setae tc′′ 2–3. Adult male: leg I with two claws; c1 3–4, c2 4–5, v2-v2 26–33; tarsi II-III setae tc″ m–2. Larval female: c1 6–8, c2 8–10, d 6 – 10, f 7–9, sc2–sc2 64–71, v1-sc1 27–32; tarsi II-III setae tc′′ minute.

Material examined. Holotype female, ex Castelnaudia porphyriaca . Conondale Range, 27 Nov. 1974, G. Monteith, unregistered specimen. Paratypes. All ex C. porphyriaca . 4 females, 4 males, 5 larvae, as follows: 1 female, 2 males, 2 larvae, same data as holotype ( QMS 113518–20 , ANIC 52-003966 – 67 ); 3 females, 2 males, 2 larvae, 1.5 km from Mt Cabinet, via Jimna , Sunday Ck , 26° 42ʹ 39ʺ S 152° 33ʹ 49ʺE, 9 Sep-30 Nov 1974, G. & S. Monteith, pitfall trap, IN5370, HR# T 57070 ( QMS 113521–25 , ANIC 52-003968 , ZMH-A0015195 ); 1 female, Conondale Range , site 1, 26° 42ʹ 46ʺ S 152° 37ʹ 08ʺE, 20 Apr–2 May 1995, B. Nomann & G. Thompson, pitfall trap, IN7291, HR# T 68573 ( QMS 113526 ). All in QM except 1 female, 1 male, 1 larva in ANIC and 1 female in ZMH .

Note: 1 female from Conondale has a fully developed larva in its body; measurements from this larva are included where features could be measured.

Description. FEMALE ( Figs 28–29 ; n = 5).

Gnathosoma ( Fig. 29D ). Length 45 (45–46), width 44 (42–45), apex indented, terminating in small but distinct lobes. Cheliceral stylets 40 (38–44), setae ch 20 (16–24), su 9 (8–12).

Idiosoma ( Fig. 28 ). Length 315 (275–325) width 405 (295–470). Prodorsal plate not eroded anteriorly; setae slender, v1 6 (5–7), v2 alveolar remnant, sc1 6 (5–7), sc2 76 (69–82). Distance between setae v1–v1 41 (34–38), sc1–sc1 100 (82–94), v1–sc1 42 (36–37; asymmetry in one specimen: 36/46), v2–v2 62 (48–58), sc2–sc2 110 (90–105), sc1–sc2 26 (27–32). Opisthosomal setae slender. Plate C setae c1 9 (6–8), c2 13 (9–14), distance between setae c1–c1 83 (69–77). Plate D setae d 9 (7–9), d–d 115 (91–110), cupuli ia anterolaterad d. Plate EF setae f 7 (6–7), f–f 85 (76–92), cupuli im anteriad to anterolaterad f. Plate H divided, seta h minute. Venter: coxisterna 1-2 moderately well defined, with few folds, coxisterna 3 membranous; coxal setae slender, 1a 3 (2–3), 2a 4 (4–5), 3a 5 (4–6), 3b 6 (5–6). Alveoli of 1b, 2b present.

Legs ( Figs 29 A-C). Setal counts legs I–III, femur-tarsus: 3-2-6(+ φ)-8(+ ω), 0-1-4-6, 0-1-4-6. Leg I. Femur I, d minute, l’ m (m–2), v″ 4 (4–5); genu I, l′ 3 (2–3), l″ 2 (2–3); tibia I, d 60 (45–55), l’ 4 (5–6), l’’ 7 (7–8), v’ 6 (5–6), v’’ 18 (14–17), k 5 (5–6), φ 10 (9–10); tarsus I, tc’ 17 (14–17), tc’’ 16 (15–16), pl’ 10 (8–9), pl’’ 20 (15–21), pv′ m (m), pv’’ 2 (2), ω 5 (4–5), s 5 (5), u′′ m (m). Leg II. Genu II, l′ 4 (3–4); tibia II, d 35 (30–42), l’ 5 (6–8), v’ 21 (19–21), v’’ 28 (21–28); tarsus II, tc′ 2 (2–4), tc ″ 2 (2), pl ″ 45 (37–46), pv’’ 2 (2), u’ 5 (5–6), u′′ m (2). Leg III. Genu III, l′ 4 (3–4); tibia III, d 35 (32–43), l’ 7 (5–8), v’ 19 (15–21), v’’ 24 (19–25); tarsus III, tc’ 3 (2–4), tc ″ 2 (2–3), pl ″ 35 (30–37), pv’’ 2 (2), u’ 5 (4–5), u′′ m (m).

LARVIFORM ADULT MALE ( Fig. 30 ; n = 4).

Gnathosoma . Length 28–30, width 29–31, apex indented, terminating in small but distinct lobes. Cheliceral stylets 17–22, setae ch 5–7, su 4–7.

Idiosoma ( Fig. 30 ). Length 140–175, width 105–120. Prodorsal plate with setae v1 4–5, v2 alveolar remnant, sc1 3–5, sc2 55–65. Distance between setae v1–v1 19–24, sc1–sc1 42–46, v1–sc1 23–26, v2–v2 26–32, sc2–sc2 53–58, sc1–sc2 16–17 (one asymmetrical specimen 14/19). Plate CD setae c1 3–4, c2 4–5, d 4–5, distance between setae c1–c1 43–51, c1–c2 23–26, d–d 37–42; cupuli ia laterad setae d. Plate EF slightly eroded medially; with setae f 4–5, distance f–f 27–28; cupuli im anteriad setae f. Genital capsule length 24–27, width 37–41, setae h m–2. Venter: coxal setae 1a 3–4, 2a 3–4, 3a 3–5, 3b 4–6.

Legs. Leg I with two claws. Setal counts legs I–III, femur-tarsus: 3-2-6(+ φ)-8(+ ω), 0-1-4-6, 0-1-4-6. Leg I. Femur I, d minute, v″ 3–4; genu I l′ 2–3, l″ 5–6; tibia I, d 29–45, l’ 5, l’’ 2, v ’ 3–4, v ’’ 8–13, k 3–4, φ 8–9; tarsus I, tc’ 14–15, tc’’ 13–15, pl’ 7–10, pl’’ 11–15, pv ′ minute, pv’’ m–2, ω 4–5, s 4, u ′′ minute. Leg II. Genu II, l′ 2–3; tibia II, d 29–38, l’ 4–6, v’ 10–14, v’’ 15–19; tarsus II, tc′ 2–3, tc ″ m–2, pl ″ 26–32, pv’’ minute, u’ 4–5, u″ minute. Leg III. Genu III, l′ 2; tibia III, d 18–26, l’ 3–5, v’ 10–14, v’’ 15–22; tarsus III, tc′ 2–3, tc ″ m–2, pl ″ 24–30, pv’’ minute, u’ 4, u″ minute.

LARVAL FEMALE ( Fig. 31 ; n = 6).

Gnathosoma . Length 36–41, width 37–39, apex indented, terminating in small but distinct lobes. Cheliceral stylets 34–37, setae ch 34–37, su 7–10.

Idiosoma ( Fig. 31 ). Length 220–245, width 150–175. Prodorsal plate with setae v1 4–8, v2 alveolar remnant, sc1 3–6, sc2 70–85. Distance between setae v1–v1 29–32, sc1–sc1 63–73, v1–sc1 31–32 (asymmetrical in one specimen, 33/27), v2–v2 42–45, sc2–sc2 64–71, sc1–sc2 25–26 (asymmetrical in one specimen, 27/23). Plate C setae c1 6–8, c2 8–10, distance between setae c1–c1 51–57. Plate D setae d 6–10, d–d 48–54, cupuli ia anterolaterad setae d. Plate EF setae f 7–9 (one specimen expressing two f setae on left, possibly in place of cupule im), f–f 40–51, cupuli im anteriad f. Plate H narrow, large, 23–29 wide, 35–38 long, bearing setae h1 ca. 170, h2 6–8. Venter: coxisterna 1-2 moderately well defined, with some folds, coxisterna 3 membranous; coxal setae slender, 1a 3, 2a 3–5, 3a 5–7, 3b 4–5. Alveoli of 1b, 2b present.

Legs. Setal counts legs I–III, femur-tarsus: 3-2-6(+ φ)-8(+ ω), 0-1-4-6, 0-1-4-6. Leg I. Femur I, d minute, l′ minute, v″ 3–4; genu I, l′ 2, l″ 2; tibia I, d 50–55, l’ 5–8, l’’ 8–10, v’ 5–6, v’’ 11–14, k 4–5, φ 10–11; tarsus I, tc’ 15–16, tc’’ 14–15, pl’ 10–13, pl’’ 20–23, pv′ minute, pv’’ minute, ω 5, s 4–5, u′′ minute. Leg II. Genu II, l′ 2–3; tibia II, d 32–40, l’ 6–7, v’ 15–18, v’’ 17–27; tarsus II, tc′ m–2, tc ″ minute, pl ″ 26–38, pv’’ m–2, u’ 4–5, u′′ minute. Leg III. Genu III, l′ 2; tibia III, d 31–40, l’ 5–7, v’ 16–17, v’’ 21–23; tarsus III, tc’ 2, tc ″ minute, pl ″ 31–38, pv’’ m–2, u’ 4–5, u′′ minute.

Differential diagnosis. The most obvious difference between E. basiatus sp. nov. and all other species on Castelnaudia is the retention of two claws on leg I of the male. This species is also distinctive within the basiatus subgroup by having: tiny setae tc″ on tarsi II-III (minute-2 versus distinctly larger (3–5) in all other species, being at least twice as massive); and shorter idiosomal setae (e.g., females with short d (7–9) versus 12–23 in the other species).

Etymology. The specific name basiatus (a kisser) refers to the distinctive lip-like protrusion of the gnathosoma found in this species group.

Figures

FIGURE 28. Eutarsopolipus basiatus sp. nov. Female, dorsum.

FIGURE 29. Eutarsopolipus basiatus sp. nov. Female, legs I-III (A-C), gnathosoma (D); Eutarsopolipus labiatus female, gnathosoma (E).

FIGURE 30. Eutarsopolipus basiatus sp. nov. Male, dorsum.

FIGURE 31. Eutarsopolipus basiatus sp. nov. Larva, dorsum. Note: left tibia II has asymmetrical expression of two setae d.