Eutarsopolipus osculum, 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 : 54-56

Eutarsopolipus osculum sp. nov.

( Figs 37–38 )

Diagnosis. Adult female: sc1 7–8, c1 15–17, c2 16–18, d 16–22, f 6–11, v2-v2 35–40, sc1-sc1 60–65, d-d 95–98, f-f 67–80; genua II-III setae l′ m–2, tibia I setae l′ 7–8, v′ 2–3, tarsi II-III setae tc′′ 3–4. Adult male: leg I with one claw; c1 5, c2 5, v2-v2 27; tarsi II-III setae tc″ 2–3. Larval female: c1 11, c2 9, d 10, f 7, sc2–sc2 71, v1-sc1 22; tarsi II-III setae tc′′ 3.

Material examined. Holotype female, ex. Castelnaudia cordata . “Glen Witheren”, shelf scrub, 28° 2ʹ 58ʺ S 153° 6ʹ 58ʺ E, 30 Dec 1991 - 24 May 1992, G. Monteith, pitfall trap, IN5682, rainforest, HR# T 68606 ( QMS 113471 ). In QM . Paratypes. All ex. C. cordata . 2 females, 1 male, 1 larva, as follows: 1 female, 1 male, 1 larva, same data as holotype ( QMS 113472-74 ); 1 female, Mt Clunie summit, 28° 18ʹ 31ʺ S 152° 31ʹ 33ʺ E, 16 Dec 1972, G. Monteith, rainforest, IN6361, HR# T 64324 ( ANIC 52-003972 ). All in QM except 1 female in ANIC .

Note: The holotype and paratype females from “Glen Witherin” are on one slide.

Description. FEMALE ( Figs 37–38 ; n = 3).

Gnathosoma . Length 42 (44), width 40 (36–38), apex indented, terminating in small but distinct lobes. Cheliceral stylets 21 (23–25), setae ch 36 (35–41), su 8 (12–13).

Idiosoma ( Fig. 37 ). Length 275 (290–310) width 185 (180–200). Prodorsal plate not eroded anteriorly; setae slender, v1 6 (6–7), v2 alveolar remnant, sc1 7 (7–8), sc2 90 (80–85). Distance between setae v1–v1 33 (30–36), sc1–sc1 65 (60–61), v1–sc1 20 (16–22), v2–v2 38 (35–40), sc2–sc2 105 (93–105), sc1–sc2 35 (31–37). Opisthosomal setae slender. Plate C setae c1 17 (15–17), c2 18 (16), distance between setae c1–c1 75 (59–72). Plate D setae d 22 (16–20), d–d 98 (95–98), cupuli ia anterolaterad d. Plate EF setae f 10 (6–11), f–f 75 (67–80), cupuli im 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 5 (5–6). Alveoli of 1b, 2b present.

Legs ( Fig. 38 ). Setal counts legs I–III, femur-tarsus: 3-2-6(+ φ)-8(+ ω), 0-1-4-6, 0-1-4-6. Ranges given only when holotype measurement different from E. basiatus . Leg I. Femur I, d minute, l’ minute, v″ 5 (5–8); genu I, l′ 2 (2), l″ 2; tibia I, d 50, l’ 7 (7–8), l’’ 8, v’ 2 (2–3), v’’ 8 (8–10), k 5, φ 10; tarsus I, tc’ 15, tc’’ 13 (13–14), pl’ 8, pl’’ 21, pv′ 2 (2), pv’’ 2, ω 3 (3), s 5, u′′ m. Leg II. Genu II, l′ m (m); tibia II, d 36, l’ 6, v’ 15 (18), v’’ 22; tarsus II, tc′ 2 (m–2), tc ″ 4 (3–4), pl ″ 45, pv’’ 2, u’ 6, u′′ m. Leg III. Genu III, l′ m (m–2); tibia III, d 33, l’ 7, v’ 10 (10–17), v’’ 25; tarsus III, tc’ 2 (2), tc ″ 4 (3–4), pl ″ 45 (42–45), pv’’ 2, u’ 7 (6), u′′ m.

LARVIFORM ADULT MALE (n = 1).

Gnathosoma . Length 28, width 26, apex indented, terminating in small but distinct lobes. Cheliceral stylets 20, setae ch 6, su 5.

Idiosoma . Length 140, width 110. Prodorsal plate with setae v1 4 (absent one side), v2 alveolar remnant, sc1 3, sc2 55. Distance between setae v1–v1 not measureable, sc1–sc1 41, v1–sc1 17, v2–v2 27, sc2–sc2 54, sc1–sc2 16. Plate CD setae c1 5, c2 5, d 6, distance between setae c1–c1 42, c1–c2 27, d–d 39; cupuli ia anteriad setae d. Plate EF slightly eroded medially; with setae f 4, distance f–f 25; cupuli im anteriad setae f. Genital capsule length 25, width 31, setae h minute. Venter: coxal setae 1a 2, 2a 3, 3a 3, 3b 3.

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; genu I, l′ minute, l″ minute; tibia I, d 38, l’ 4, l’’ 4, v ’ 3, v ’’ not measurable, k 3, φ 8; tarsus I, tc’ 13, tc’’ 10, pl’ 5, pl’’ 15, pv ′ minute, pv’’ minute, ω 3, s 4, u ′′ minute. Leg II. Genu II, l′ 2; tibia II, d 19, l’ 4, v’ 11, v’’ 16; tarsus II, tc′ minute, tc ″ 2, pl ″ 31, pv’’ minute, u’ 4, u″ minute. Leg III. Genu III, l′ minute; tibia III, d 19, l’ 5, v’ 9, v’’ 13; tarsus III, tc′ minute, tc ″ 3, pl ″ 25, pv’’ minute, u’ 5, u″ minute.

LARVAL FEMALE (n = 1).

Gnathosoma . Length 40, width 35, apex indented, terminating in small but distinct lobes. Cheliceral stylets 35, setae ch 28, su 7.

Idiosoma . Length 195, width 140. Prodorsal plate with setae v1 5, v2 alveolar remnant, sc1 6, sc2 95. Distance between setae v1–v1 28, sc1–sc1 58, v1–sc1 22, v2–v2 33, sc2–sc2 71, sc1–sc2 22. Plate C setae c1 11, c2 9, distance between setae c1–c1 46. Plate D setae d 10, d–d 51, cupuli ia anterolaterad setae d. Plate EF setae f 7, f–f 38, cupuli im anterolaterad f. Plate H narrow, large, 20 wide, 33 long, bearing setae h1, broken, h2 7. Venter: coxisterna 1-2 moderately well defined, with some folds, coxisterna 3 membranous; coxal setae slender, 1a 4, 2a 4, 3a 4, 3b 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″ 5; genu I, l′ minute, l″ minute; tibia I, d 55, l’ 8, l’’ 8, v’ 3, v’’ 13, k 5, φ 10; tarsus I, tc’ 13, tc’’ 14, pl’ 6, pl’’ 20, pv′ minute, pv’’ 2, ω 3, s 5, u′′ minute. Leg II. Genu II, l′ minute; tibia II, d 27, l’ 6, v’ 12, v’’ 17; tarsus II, tc′ 2, tc ″ 3, pl ″ 35, pv’’ 2, u’ 5, u′′ minute. Leg III. Genu III, l′ 2; tibia III, d 34, l’ 7, v’ 13, v’’ 15; tarsus III, tc’ minute, tc ″ 3, pl ″ 34, pv’’ minute, u’ 6, u′′ minute.

Differential diagnosis. Eutarsopolipus osculum sp. nov. is most similar to E. basiatus sp. nov. in having short setae sc1 (<10) and a shorter distance between setae d-d (95–115) and f-f (67–92). In addition to the features noted in the Differential diagnosis of E. basiatus , E. osculum has a shorter seta c1 (15–17 versus 6–9).

Etymology. The name osculum (little mouth or little kiss) alludes to both the lip-like protrusion of the gnathosoma but also the smaller size of this species.

Figures

FIGURE 37. Eutarsopolipus osculum sp. nov. Female, dorsum.

FIGURE 38. Eutarsopolipus osculum sp. nov. Female, legs I-II (A-B), left side, dorsal view; gnathosoma (C).