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 Author Moraza, María L. Author Irwin, Nancy R. Author Godinho, Raquel Author Baird, Stuart J. E. Author Bellocq, Joëlle Goüy De text Zootaxa 2009 2007 58 68 journal article 10.5281/zenodo.185725 b87d87a0-a70f-4b42-883d-36406816b888 1175-5326 185725 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.