Gastronyssus bakeri Fain, 1955

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 : 37-38

1. Gastronyssus bakeri Fain, 1955

( Fig. 11–14 )

Gastronyssus bakeri Fain 1955: 683 , figs. 1–9, 1959a: 4, figs. 1–2, 1964b: 47, fig. 3, 1972: 71; Fain et al. 1974: 173;

Stiller & Sullivan 1977: 250.

Redescription. FEMALE (paratype + specimen from type host and locality). Body 970–1230 long, 235–275 wide. Propodonotal shield length 110–130, maximum width 115–130. Sternum 100–115 long. Apodemes II fused to each other in their posterior third. Inseminatory canal 80-90 long. Tibiae I–II 50–45 long; tibiae III– IV 40–35 long; all tibiae about 2 times longer than respective genua. Length/width (at base of segment) ratio of tibiae I–II about 1:2; tibiae III–IV 1:3. Setae r III–IV claw-like, distinctly developed. Setal lengths: 1a 11– 12, h2 13–14, vF I–II about 5, cG I–II about 5, mG I–II about 7, gT I–II about 6, ϕI–II about 5, r I–II about 13, w I–II about 10.

MALE (4 specimens from type host and locality). Body 730–745 long, 220–235 wide. Propodonotal shield length 55–60, maximum width 58–70. Sternum 90–110 long, Apodemes II fused to each other in their posterior third. Aedeagus about 80 long. Setae 4b indiscernible or absent. Vestiges of setae ps3 situated on nipple-like protrusions. Tibiae I–II about 40 long; tibiae III about 50 long, tibiae IV about 60 long, without dorso-apical tubercle; all tibiae about 2 times longer than respective genua. Genua IV without ventral spurs. Length/width (at base of segment) ratio of tibiae I–II about 1:2; tibiae III–IV 1:3. Setae r III claw-like, distinctly developed. Setal lengths: 1a 10–11, h2 11–12, vF I–II about 4, cG I–II about 4, mG I–II about 6, gT I–II about 4, ϕI–II about 4, r I–II about 17, w I–II about 12.

Type material examined. One female, 2 protonymphs, and 1 larva paratypes ( IRSNB) from Eidolon helvum (Kerr) (Pteropodidae) , RWANDA: Butare (= Astrida), 02°35'50"S, 29°44'20"E, October 1955, coll. A. Fain.

Type deposition. Holotype is deposited in MRAC.

Non-type material examined. One female ( IRSNB) [incorrectly designated as paratype, collected after original description] from Eidolon helvum , RWANDA: Butare (= Astrida ), 02°35'50"S, 29°44'20"E, May 1956, coll. unknown ; 3 males ( IRSNB) [incorrectly designated as paratypes], same host and locality, 5 April 1956, coll. unknown ; 1 male from same host, RWANDA: Butare, Ruhashya , 02°28'21"S, 29°43'52"E, 4 September 1956, coll. unknown ; 1 female, 1 male, 1 tritonymph, 1 protonymph ( USNM) from Eonycteris spelaea (Dobson) , MALAYSIA: Negeri Sembilan, Ulu Jempol, Kampung Tengah , 1975, coll. D. Stiller.

Host range and distribution. This species parasitizes megachiropterans in tropical Africa and Asia, Eidolon helvum (type host) from Rwanda and Liberia, Rousettus aegyptiacus (Geoffroy) from the Democratic Republic of Congo ( Fain 1955, 1959; Fain et al. 1974) and Cynopterus brachotis (Müller) , C. horsfieldii Gray , and Eidolon spelaea from Malaysia ( Stiller & Sullivan 1977).

Figures

FIGURE 11. Gastronyssus bakeri Fain, 1955, female propodonotal shield and gnathosoma. A, dorsal view; B, ventral view.

FIGURE 12. Gastronyssus bakeri Fain, 1955, female. A, dorsal view; B, ventral view; C, tarsus I in dorsal view; D, tarsus III in dorsal view; E, tarsus IV in dorsal view; F, tibia I in dorsal view; G, tibia III in dorsal view. Scale bars: 100 µm (A, B), 50 µm (C–G).

FIGURE 13. Gastronyssus bakeri Fain, 1955, male. A, ventral view; B, aedeagus; C, tibia and tarsus I in dorsal view; D, tibia and tarsus II in dorsal view; E, tibia and tarsus III in dorsal view; F, tibia and tarsus IV in dorsal view; G, posterior part of genu III in ventral view; H, posterior part of genu IV in ventral view. Scale bars: 100 µm (A), 25 µm (B–H).

FIGURE 14. Gastronyssus bakeri Fain, 1955, larva (A–C). A, leg I in dorsal view; B, leg II in dorsal view; C, tarsus and tibia III in dorsal view. Protonymph (D, E). D, tibia and tarsus III in dorsal view; E, tibia and tarsus IV in ventral view.