Gaeolaelaps

Nemati, Alireza & Mohseni, Mastaneh, 2013, Two new species of Gaeolaelaps (Acari: Laelapidae) from Iran, Zootaxa 3750 (1), pp. 71-82 : 79-80

Key to the species of Gaeolaelaps that have short peritremes

1. Peritreme very short, reaches only to middle level of coxa III.......................... G. carabidophilus Trach, 2012

- Peritreme not very short, reaches to middle or anterior margin of coxa II.......................................... 2

2. Peritreme reaches to anterior margin of coxa II.............................................................. 3

- Peritreme reaches to middle of coxa II..................................................................... 4

3. Dorsal shield with 41 pairs of setae; anal shield sub-triangular and longer than wide; genital shield clearly longer than wide,

length/width= 3:1; dorsal setae nearly equal in length (28–33 µm); idiosoma 400–480 µm long, 180–220 µm wide............................................................................................. G. macra (Karg, 1978) - Dorsal shield with 39 pairs of setae; anal shield nearly rounded and wider than long; genital shield not as above, length/width= 2:1; dorsal setae nearly equal in length (15–20 µm); idiosoma 489–491 µm long, 270–276 µm wide..... G. orbiculatus sp. n.

4. Except j1 and Z5 all dorsal setae extremely reduced (5–7 µm long); Z5 thrice the length of J5; dorsal shield with 38 pairs of setae, 21 pairs on podonotum (lacks s1) and 17 pairs on opisthonotum; idiosoma 430–450 µm........ G. gleba (Karg, 1979)

- Dorsal setae not extremely reduced; Z5 not as above.......................................................... 5

5. Dorsal shield with 37 pairs of setae....................................................................... 6

- Dorsal shield with 38–39 pairs of setae.................................................................... 8

6. Podonotum with 20 or 22 pairs of setae.................................................................... 7

- Podonotum with 19 (lacks z2, s1 and r3) and opisthonotum with 18 pairs of setae (R5 located on dorsal shield between S4 – 5); without R series on lateral cuticle; idiosoma 420–460 µm................................. G. vertisimilis (Karg, 1994)

7. Podonotum with 20 (lacks s1 – 2, and has r2 – 5) and opisthonotum with 17 pairs of setae (with Px1 – 2); opisthonotum wider than podonotum; with R1 – 2 and R4 on lateral cuticle; idiosoma 350–360 µm........................ G. verticis (Karg, 1979)

- Podonotum with 22 pairs of setae, with complete s - series; opisthonotum with 15 pairs of setae (without Px1 – 2); podonotum wider than opisthonotum; idiosoma 483–540 µm...................................... G. zhoumanshuae (Ma, 1997)

8. Dorsal shield with 38 pairs of setae (without Px3); dorsal shield smooth; without exopodal plates; with very thin peritrematal plate, poststigmatal plate narrow and expanded posteriorly to surround coxa IV........... G. orientalis (Hafez et al., 1982)

- Dorsal shield with 39 pairs of setae (with Px2 – 3); dorsal shield reticulated; with exopodal plates; poststigmatal plate not sur- rounded coxa IV..................................................................................... 9

9. Genital shield extending close to anal shield, length/width nearly 3:1; iv2 slit-like; J2 located well laterad J1 ............ 10

- Genital shield not extending close to anal shield, length/width nearly 2:1; iv2 pore-like; J2 located behind of J1 .......... 11

10. Genital shield as wide as anal shield; z3 absent; with r2 – 5; margin of epistome like a pointed roof and serrate, Z5 = 45–52 µm; idiosoma 650–670 µm................................................................. G. cerata (Karg, 1982)

- Genital shield distinctly wider than anal shield; z3 present; with r2 – 4; margin of epistome arcuated and fine serrate, Z5 = 50–56 µm; idiosoma 660–720 µm............................................................. G. loksai (Karg, 2000)

11. With one pair of zx setae on podonotum, between z4 and z5................................. G . latopuga (Karg, 2006)

- Without zx setae on podonotum, between z4 and z5 .......................................................... 12

12. Dorsal shield setae long enough to reach well past the base of next posterior seta, the length of j5 is longer than distance between j5 and j6, exterior margin of post-stigmatal plate with deep incision, sternal setae long enough to reach to the base of the next................................................................... G. dailingensis (Ma & Yin, 1998)

- Dorsal shield setae shorter, central opisthonotal setae short, sometimes reaching base of next posterior seta but never past it, the length of j5 is shorter than distance between j5 and j6; sternal setae shorter and not reach to the base of next.......... 13

13. Palp apotele 3-tined...................................................... G. bregetovae (Shereef & Afifi, 1980)

- Palp apotele 2-tined................................................................................... 14

14. Lateral margins of genital shield parallel.................................................................. 15

- Lateral margins of genital shield not parallel, the widest area of genital shield located behind genital setae.............. 16

15. Surface of genital and sternal shields smooth; sternal shield with no defined anterior margin; the length of anal shield is 1.5 times as its width............................................................. G. arabicus (Hafez et al., 1982)

- Surface of genital shield with polygonal reticulation; sternal shields reticulated in lateral surfaces; sternal shield with well defined anterior margin; anal shield nearly as long as wide..................................... G. nolli (Karg, 1962)

16. Genital shield with scale-like reticulation, the distance between j5 – j6 1.5 the length of j5; Z5 as long as other dorsal setae; setae st4 located in soft cuticle......................................................... G. koseii (Hafez et al., 1982)

- Genital shield with polygonal reticulation, the distance between j5 – j6 is thrice the length of j5; Z5 longer than other dorsal setae; setae st4 located on minute platelets............................................. G. similisetae (Karg, 1965)