Ophionyssus

Moraza, María L., Irwin, Nancy R., Godinho, Raquel, Baird, Stuart J. E. & Bellocq, Joëlle Goüy De, 2009, A new species of Ophionyssus Mégnin (Acari: Mesostigmata: Macronyssidae) parasitic on Lacerta schreiberi Bedriaga (Reptilia: Lacertidae) from the Iberian Peninsula, and a world key to species, Zootaxa 2007, pp. 58-68 : 65-66

Key to females of Ophionyssus

1. Dorsal shield of female divided into a large anterior and minute pygidial shields ...................................................... 2

- Dorsal shield of female entire....................................................................................................................................... 6

2. Podonotal shield with 10 pairs of setae, two pairs of minute mesonotal scutellae and pygidial shield with 1 or 2 setae or nude; sternal shield ratio width/length: 2.5; peritreme extending to posterior margin of coxae II; podonotum 300 long, 276 wide; on snakes in Africa; in vivaria all over the world ...................................... O . natricis (Gervais, 1844)

- Anterior dorsal shield with other characteristics; mesonotal scutellae absent.............................................................. 3

3. Anterior dorsal shield roughly pentagonal with 12–13 pairs of setae (z2 on or off shield); pygidial shield with setae Z5 or one seta Z5 or nude; dorsal soft cuticle hypertrichy absent, with Z1-Z4, s6, S3-S5, r2, r3, r5, R1, and deutonymphal setae R; sternal shield ratio width/length: 2–2.5; peritremes shortened, confined to region of coxae IV; idiosoma 687 long, 440 wide; on Scincidae, Java ............................ O . javanensis Micherdzinsli & Lukoschus, 1987

- Podonotal shield with 7–8 pairs of setae; pygidial shield nude.................................................................................... 4

4. Anterior dorsal shield with 8 pairs of setae, roughly rhomboidal: setae j1 off the shield; 2 pairs of opisthonotal setae on the shield; sternal shield ratio width/length: 1.5–2; peritremes extending to anterior border of coxae III; female 870 long, 595 wide; on Scincidae , South Africa........................................................................ O . mabuyae Till, 1957

- Podonotal shield with 8 pairs of setae: 1 pair of opisthonotal setae J on the shield .................................................... 5

5. Anterior dorsal shield with 7–8 pairs of setae; setae j1 off the shield, only one seta j 2 may be present; dorsal setae on soft cuticle elongate, except 3 pairs of short setae (s4, s5, J); sternal shield ratio width/length: 1.5–2; peritremes shortened, confined to region of coxae IV; dorsal shield 405–450 long, 255 wide; on Scincidae , Australia................ ............................................................................................................................... O . arnhemlandensis Domrow, 1985

- Anterior dorsal shield ovoid; setae j1 on anterior margin of podonotal shield; setae j2 absent; most dorsal setae on soft cuticle as long as setae on the shield; sternal shield ratio width/length: 1.5–2; peritremes extending to middle of coxae III; dorsal shield 700–820 long; on Lacertidae and Agamidae ; Asia .... O . eremiadis Naglov & Naglova, 1960

6. Dorsal shield with 24–30 pairs of setae; genital setae on genital shield....................................................................... 7

- Dorsal shield shortened, with fewer than 24 pairs of setae (11–15 pairs of setae); genital setae off genital shield.... 9

7. Dorsal shield with reticulate surface and 30 pairs of dorsal setae including 14 pairs on opisthonotal region (J5 present); at least 16 pairs of ventral setae on soft cuticle; sternal shield ratio width/length: 4.5–5; peritremes extending to posterior margins of coxae II; dorsal shield 520–555 long; on Scincidae , South Australia........................................... ............................................................................................................................................ O . ehmanni Domrow, 1985

- Dorsal shield elongated, with 24–25 pairs of setae; setae J5 present or absent; peritremes extending to anterior bor- der of coxae I................................................................................................................................................................. 8

8. Setae J5 absent; dorsal shield with 23–24 pairs of setae including 11 pairs of opisthonotal setae; ventra soft cuticle with hypertrichy; sternal shield ratio width/length: 3.5–4; genu IV, pl2 present; dorsal shield 675 long, 322 wide; on Pygopodidae , New Zealand........................................................................................ O . galeotes Domrow et al., 1980

- Setae J5 present; dorsal shield with 25 pairs of setae, including 13 pairs of opisthonotal setae; sternal shield ratio width/length: 2–2.5; genua IV, pl2 absent; dorsal shield 758 long, 352 wide; on Scincidae , New Zealand, Tasmania and South Australia................................................................................................. O . scincorum Domrow et al., 1980

9. Dorsal and ventral setae on soft posterior cuticle very long, thick and spine-like; 11–13 pairs of heterogeneous setae on the shield; sternal shield ratio width/length: 7–8.5; peritremes extends to the anterior border of coxae II; dorsal shield 525 long, 255 wide; Lacertidae , South Africa....................................................... O . tropidosaurae ( Till, 1957)

- Setae on soft posterior cuticle slender; sternal shield longer...................................................................................... 10

10. Peritremes not extending beyond anterior border of coxae III; sternal shield ratio width/length: 2–2.5; para-anal setae level with middle of anal opening; dorsal shield with 11 pairs of fine setae; those of soft cuticle much longer and thicker; dorsal shield 586 long, 290 wide; Scincidae , South Africa............................... O . lawrencei ( Till, 1957)

- Peritremes extending beyond anterior border of coxae III; para-anal setae level with anterior or posterior borders of anal opening ................................................................................................................................................................ 11

11. Peritremes extending to anterior border of coxae I; anal pores level with posterior margin of anal opening............ 12

- Peritremes extending as far as anterior border of coxae II ......................................................................................... 14

12. Dorsal shield with 13 pairs of setae; sternal shield trapezoidal with straight anterior border, ratio width/length: 3–3.5; genital shield 120 long; anal shield 125 x 80; hypertrichy on ventral soft cuticle present; dorsal shield 570 long, 315 wide (ratio 1.5–2); on Cordylidae , South Africa.................................................... O . africanus ( Till, 1957)

- Dorsal shield with 14–15 pairs of setae; genital shield at least twice as long as 120................................................ 13

13. Dorsal shield with 15 pairs of setae, setae s5 and z2 on dorsal shield, Z5 off shield; sternal shield rectangular with slightly concave anterior border, ratio width/length: 3; genital shield 280 long; anal shield 115 x 69; dorsal shield 600 long, 280 wide (ratio 2–2.2); on Lacertidae, Gran Canaria (Canary Islands) ................ O . setosus Fain & Bannert

- Dorsal shield with 14 pairs of setae, setae s5 and Z5 on shield, z2 off shield; sternal shield trapezoidal with anterior border concave, ratio width/length:3–3.5; genital shield 270 long; anal shield 120 x 60; dorsal shield 558 long, 300 wide (ratio 1.5–1.9); on Lacertidae, Tenerife (Canary Islands) ................................... O. galloticolus Fain & Bannert

14. Peritremes extending to anterior margin of coxae II; dorsal shield with 14–15 pairs of setae (z2, s5 and one or 2 setae Z5 on shield; sternal shield, ration width/length: 3; genital shield 144 long; anal shield 160 x 84; tibia IV with 3 posterodosal setae; dorsal shield 696 long, 264 wide (ratio 2.6); on Lacertidae , Europe ............... O. lacertinus (Berlese)

- Peritremes extending as far as anterior third of coxae II; dorsal shield with 12–13 pairs of setae; setae z2 off dorsal shield ........................................................................................................................................................................... 15

15. Dorsal shield with 12 pairs of setae (z2, s5, Z5 off shield); peritremes extending to posterior third of coxae II; sternal shield slightly trapezoidal with anterior border concave, ratio width/length: 2.5; genital shield 350 long, with rounded anterior pyginial lobe; anal shield 138 x 75; dorsal shield 633 x 225–246 wide (ratio 2.4); on Lacertidae, Lanzarote (Canary Islands) ...................................................................................... O. dolatelacensis Fain & Bannert

- Dorsal shield with 12–13 pairs of setae; peritremes longer; sternal shield, ratio width/length: 2.5–3....................... 16

16. Dorsal shield with 13 pairs of setae (s5 on shield, z2 and Z5 off shield); peritremes extending to approx. anterior third of coxa II; genital shield 150 long, 60 wide; anal shield 105 x 75; tibia IV with 2 postero-dorsal setae; dorsal shield 670 long, 192 wide (ratio 2.6); on Lacertidae , Europe............................................... O. sauracum (Oudemans)

- Dorsal shield with 12–13 pairs of setae (z2 and s5 off shield, Z5 on or off shield); peritremes extend to middle of coxa II; genital shield 329 long; anal shield 143 x 79; tibia IV with 3 postero-dorsal setae; dorsal shield 700 x 259 wide (ratio 2.7); on Lacertididae, Iberian Peninsula.............................................. O. schreibericolus Moraza sp. nov.