Yunkeracarus limnomys Bochkov

Bochkov, Andre V., Zabludovskaya, Svetlana & Oconnor, Barry M., 2008, Phylogeny and systematics of the endoparasitic astigmatid mites (Acari: Sarcoptiformes) of mammals: families Gastronyssidae, Lemurnyssidae, and Pneumocoptidae, Zootaxa 1951 (1), pp. 1-152 : 108-110

4. Yunkeracarus limnomys Bochkov et OConnor sp. nov.

( Fig. 55 )

Description. FEMALE (holotype). Body, including gnathosoma, 410 long (400–410 in 2 paratypes), 195 wide (180–195). Propodonotal shield with widely rounded posterior margin, length 60 (52–60), maximum width 70 (65–70). Setae si about 2 times shorter than se, 19 [unpaired in holotype] (19–25) and 40 long (35– 40), respectively. Distance se–se 65 (57–65), 5–6 times greater than si–si, 10 (9–10). Bursa copulatrix opening dorsal. Sternum about 18 long (13–18). Posterior projections of coxal fields I distinctly developed, longer than wide, about 10 long, 7 wide. Distance between distal ends of apodemes II about 25. Two pairs of weakly developed folds present ventrally on propodosoma posterior to coxal fields II. Distance 4a–4a 40 (40–48), 1.1–2 times greater than ps3–ps3, 35 (22–35). Alveoli of setae h1 and h3 absent. Legs III and IV subequal in length, about 125 and 140 long (excluding pretarsus), respectively. Setae pR I–II absent. Setae cG I–II microspines, about 3 long. Setal lengths: 1a 13 (12–13), c3 16 (15–16), cp 45 (35–45), h2 140 (150–160), vF I–II about 35 long, mG I–II about 45, gTI–II about 4, solenidia ϕI–II about 11, ω 1 I–II about 10.

MALE (3 paratypes). Body, including gnathosoma, 330–340 long, 145–155 wide. Propodonotum as in female. Propodonotal shield 52–55 long, 55-77 maximum wide. Setae si 18–20 long, 1.5 times shorter than se, 28–30 long. Distance se–se 52–55, about 5 times greater than si–si, 8–10. Sternum about 17 long. Posterior projections of coxal fields I distinctly developed, longer than wide, about 11 long, 9 wide. Distance between distal ends of apodemes II about 20. Two pairs of weakly developed folds present ventrally on propodosoma posterior to coxal fields II. Aedeagus about 45 long, its posterior end situated slightly posterior to level of setae g. Length and width ratio of postgenital shield subequal, about 27 long. Distance g–g 18, about 1.3 times greater than ps3–ps3, 13. Alveoli of setae h1 and h3 absent. Legs III and IV subequal in length, about 115 and 130 long (excluding pretarsus), respectively. Setae pR I–II absent. Setae cG I–II microspines, about 3 long. Setal lengths: 1a 11–12, c3 12–14, cp 35, h2 130–145, vF I about 25, vF II about 30, mG I–II about 35, gT I–II 3, solenidia ϕI–II 11–12, ω 1 I–II 6–7.

Type material examined. Female holotype, 2 female, 3 male, and 2 protonymph paratypes ( BMOC 93- 1300 - 063 ) ex Limnomys bryophilus Rickart, Heaney et Tabaranza ( Muridae ) ( FMNH 147974 ) , PHILIP- PINES: Mindanao Island, Bukidnon Prov., Mt. Katanglad Range , 18.5km S, 4km E Camp Philips, 2250m, 7 April 1993, coll. E.A. Rickart ( EAR 2583 ) .

Type deposition. Holotype and paratypes are deposited in FMNH, other paratypes in NMP and UMMZ.

Non-type material examined. Ten females and 3 males ( BMOC 93-1300-007) ex Tarsomys apoensis Mearns (Muridae) ( FMNH 147954), PHILIPPINES: Mindanao Island, Bukidnon Prov., Mt. Katanglad

Range , 16.5km S, 4km E, Camp Philips, 1900m, 12 March 1993, coll. E.A. Rickart ( EAR 2495 ); 2 females ( BMOC 93-1300 - 161 ) ex Batomys salomonseni (Sanborn) , same locality, 2250m, 9 April 1993, coll. L.R. Heaney ( LRH 5308 ) .

Host range and distribution. This species is known from the old Philippine endemics, Limnomys bryophilus (type host), Tarsomys apoensis , and Batomys salomonseni .

Etymology. The species name is derived from the generic name of the host and is a noun in apposition.

Remarks. This new species is closely related to Y. apomys . In both species, setae si are distinctly shorter than se, the distance si–si, is short, about 3–6 times shorter than se–se, setae cG I are microspines, about 2.5 long, the bursa copulatrix opens dorsally. These two species differ from each other by the following characters. In both sexes of Y. limnomys , the posterior projections of coxal fields are longer than wide, setae pR I–II are absent; in females the ventral folds of the propodosoma are weakly developed, in males, the posterior end of the aedeagus is situated slightly posterior to the level of setae 4a. In both sexes of Y. apomys , the posterior projections of coxal fields are shorter than wide, setae pR I–II are present; in females, the ventral folds of the propodosoma are distinct, in males, the posterior end of the aedeagus is situated at the level of setae 4a.

Figures

FIGURE 55. Yunkeracarus limnomys Bochkov et OConnor sp. nov., female (A–H). A, dorsal view; B, ventral view; C, tarsus I in ventral view; D, tarsus II in ventral view; E, tarsus III in ventral view; F, tarsus IV in ventral view; G, genu I in lateral view; H, genu II in lateral view. Male (I–K). I, fragment of propodonotum; J, opisthosoma in ventral view; K, aedeagus. Scale bars: 100 µm (A, B, J, I), 50 µm (C–H, K).