Petauralges rackae Fain and Lukoschus, 1979

Grootaert, Patrick, 2013, Revision of the family Listropsoralgidae Fain, 1965 (Acariformes: Sarcoptoidea) - skin parasites of marsupials and rodents 3611, Zootaxa 3611 (1), pp. 1-69 : 53-56

Petauralges rackae Fain and Lukoschus, 1979

( Figs. 39–45 )

Petauralges rackae Fain and Lukoschus, 1979: 387 , figs. 1–4; Domrow 1988: 87, 1992: 1518.

Redescription. FEMALE (1 paratype). Body 205 long and 150 wide. Gnathosoma . Ventral retrorse spurs of subcapitulum absent. Dorsum. Dorsal shields weakly ornamented. Propodonotal shield about 45 long. Setae se 56 long, 5 times longer than si, not reaching level of seta d2 bases. Hysteronotal shield about 105 long, bearing setae c1 and e1, other hysteronotal setae situated off this shield. Venter. Setae 1a situated almost at posterior ends of apodemes Ia. Epigynum 39 wide. Opisthogastric shield monotonously sclerotized, length and width of this shield subequal, about 35 long. Setae c3 slightly spur-like. Setae 1a, 3a, 4a, and 4b filiform. Setae ps3 and ps2 thickened spur-like, subequal in length. Setae h3 filiform. Legs. Setae d I subequal in length to solenidion ω 3 I. Tibiae I and II with distinct ventro-antiaxial spur, and accessorial spur at its base. Legs III about 95 long. Tarsi III with 3 hooks, 1 ventro-paraxial and 2 ventro-antiaxial. Legs IV about 55 long, 1.7 times shorter than legs III. Setae sR III not reaching respective genu0a. Tarsi IV subequal in length to respective tibiae. Lengths of setae: cp 70, c3 22, d1, d2, e1, e2, f2, h1, and ps1 —all 8–12, h2 105, h3 7, ps2 and ps3 about 19, 1a 16, 3a 23, 4b and 4a – about 15, g 8, ω 1 I and ω 1 II about 25, ω 3 I 20, φI and II about 35, φIII 26, φIV 3, σ 1 I 26, σII 15, and σIII 9.

MALE (2 paratypes). Body 155–160 long and 130–140 wide. Gnathosoma . Ventral retrorse spurs of subcapitulum absent. Dorsum. Dorsal shields covered by monotonous ornamentation. Propodonotal shield 50–54 long. Setae se 59–62 long, 9 times longer than si, not reaching level of seta d2 bases. Hysteronotal shield 85–90 long. Venter. Seta c3 narrowly lanceolate. Diameter of adanal suckers about 6. Legs. Legs III about 85 long. Legs IV about 30 long. Lengths of setae: c2 28–30, cp 57–60, c3 23–24, d1 32–35, d2 3–4, e1 23–25, e2 8–10, f2 6–7, h1 16–18, h2 40–45, h3 7–8, ps1 12–14, ps2, ps3, 4a and g 3–5, 1a 10–11, 3a 20–22, 4b 8–10, ω 1 I and II, ω 3 I 19–21, φI and II 30–35, φIII about 35, φIV 3, σ 1 I 19–20, σII 8–10, and σIII about 22.

TRITONYMPH (1 paratype). Idiosoma 185 long and 145 wide. Gnathosoma . Ventral retrorse spurs of subcapitulum absent. Dorsum. Dorsal shields covered by dotted ornamentation, distinctly separated from each other. Setae se and si located off propodonotal shield. Hysteronotal shield bearing only setae c1. Setae c3, ps3, ps2, and h3 short filiform. Venter. Coxal fields II with weakly developed external folds. Legs. Legs I–III as in female. Legs IV 2-segmented, proximal segment (? tibia) without setae.

Type material examined. One female, 2 male, 1 tritonymph, and 1 protonymph paratypes ( IRSNB) from Petaurus breviceps (T 663 ZMH), AUSTRALIA: other data unknown, 29 November 1913. Holotype deposition. Holotype male (not examined) is deposited in ZMH. Host range and distribution. This species is known only from the type host, Petaurus breviceps from an unknown locality in Australia ( Fain & Lukoschus 1979).

Figures

FIGURE 39. Petauralges rackae Fain and Lukoschus, 1979, female in dorsal view.

FIGURE 40. Petauralges rackae Fain and Lukoschus, 1979, female in ventral view.

FIGURE 41. Petauralges rackae Fain and Lukoschus, 1979, male in dorsal view.

FIGURE 42. Petauralges rackae Fain and Lukoschus, 1979, male in ventral view.

FIGURE 43. Petauralges rackae Fain and Lukoschus, 1979, details in ventral view: A and B—male legs I and II, respectively; C—male, genu-tarsus III; D—male, tibia and tarsus IV, E—male, posterior margin of opisthosoma; F — female, leg III.

FIGURE 44. Petauralges rackae Fain and Lukoschus, 1979, tritonymph in dorsal view.

FIGURE 45. Petauralges rackae Fain and Lukoschus, 1979, tritonymph in ventral view.