Ologamasidae

Key to genera of Ologamasidae (adult females)

1. Podonotal and opisthonotal shields completely separated...................................................... 2

- Podonotal and opisthonotal shields fused to form a holonotal shield, line of fusion may or may not be visible............ 22

2. Epistome with club-shaped anterocentral extension; peritrematal and exopodal shields fused by a narrow connection posterior

to stigma..................................................................... Geogamasus (part) (Figs 1–4) - Epistome without club-shaped anterocentral extension; peritrematal shield not fused to exopodal shield, or fused to exopodal shield posterior to stigma by a connection wider than width of peritreme......................................... 3

3. Dorsal shield setae inserted on long stalks............................................... Oriflammella (Figs 5–8)

- Dorsal shield setae not inserted on stalks.................................................................. 4

4. Opisthonotal and ventrianal shields fused.................................................................. 5

- Opisthonotal and ventrianal shields not fused................................................................ 9

5. Presternal plates absent; pretarsus I absent................................................ Euepicrius (Figs 9–12)

- Presternal plates present; pretarsus I present................................................................ 6

6. With one pair of presternal plates.................................................... Gamaselliphis (Figs 13–16)

- With two pairs of presternal plates....................................................................... 7

7. Opisthogastric region without latero-diagonal fissure; peritreme extending anteriorly to anterior margin of coxa II............................................................................................ Hiniphis (Figs 17–20)

- Opisthogastric region with a distinct latero-diagonal fissure; peritreme extending anteriorly to region of coxa I........... 8

8. Peritrematal shield fused only to exopodal shield near coxa IV.............................. Desectophis (Figs 21–24)

- Peritrematal shield fused to exopodal shield near coxa IV and ventrianal shield..................... Acuphis (Figs 25–28)

9. Podosomal section of dorsum with 28 or more pairs of setae................................................... 10

- Podosomal section of dorsum with fewer than 25 pairs of setae............................................... 12

10. Opisthosomal section of dorsum with more than 30 pairs of setae................................ Pilellus (Figs 29–32)

- Opisthosomal section of dorsum with fewer than 21 pairs of setae............................................. 11

11. Podosomal section of dorsum with 32 pairs of setae and a medial unpaired seta; trochanter IV with six setae, genu III with ten setae and tibia III with nine setae.................................................. Notogamasellus (Figs 33–36)

- Podosomal section of dorsum with 28 pairs of setae; trochanter IV with five setae, genu III with nine setae and tibia III with eight setae................................................................ Podonotogamasellus (Figs 37–40)

12. Peritreme extending anteriorly at most to median region of coxa III....................... Allogamasellus (Figs 41–44)

- Peritreme extending anteriorly at least to median region of coxa II.............................................. 13

13. Setae av2, pv2 on tibia I long, thick, spine-like............................................................ 14

- Setae av2, pv2 on tibia I unmodified...................................................................... 15

14. Tarsus I with a small pair of claws; dorsal shield setae j 1 not on prominent protuberance; on genu I av2 spine-like, al1 unmod- ified......................................................................... Heterogamasus (Figs 45–48)

- Tarsus I without claws; dorsal shield setae j 1 on prominent protuberance; on genu I al1 spine-like, av2 unmodified......................................................................................... Evanssellus (Figs 49–52)

15. Presternal plates absent............................................................. Cyrtolaelaps (Figs 53–56)

- Presternal plates present............................................................................... 16

16. With one pair of presternal plates; if with two pairs (in Rhodacaroides aegypticus), peritrematal shield not fused with exopodal shield near coxa IV.................................................................................. 17

- With 2–5 pairs of presternal shields; if with two pairs, peritrematal shield fused with exopodal shield near coxa IV....... 19

17. Dorsal shields with some setae pilose and/or spatulate.................................... Acugamasus (Figs 57–60)

- Dorsal shields without pilose or spatulate setae............................................................ 18

18. Peritrematal shield not fused with exopodal shield near coxa IV........................... Rhodacaroides (Figs 61–64)

- Peritrematal shield fused with exopodal shield near coxa IV.............................. Euryparasitus (Figs 65–68)

19. Peritrematal and ventrianal shields fused.................................................. Periseius (Figs 69–72)

- Peritrematal and ventrianal shields not fused............................................................... 20

20. Opisthonotal section of dorsal shield with 12 pairs of setae................................ Solugamasus (Figs 73–76)

- Opisthonotal section of dorsal shield with more than 12 pairs of setae........................................... 21

21. With two or three pairs of presternal plates............................................... Gamasellus (Figs 77–80)

- With five pairs of presternal plates.................................................... Litogamasus (Figs 81–84)

22. Line of fusion between podonotal and opisthonotal shields distinctly visible, straight or U-shaped.................... 23

- Line of fusion between podonotal and opisthonotal shields indistinct or absent.................................... 24

23. Line of fusion between podonotal and opisthonotal shields straight; peritrematal shield and exopodal shield near coxa IV not fused........................................................................ Gamasellevans (Figs 85–88)

- Line of fusion between podonotal and opisthonotal shields U-shaped; peritrematal shield and exopodal shield near coxa IV fused.............................................................................. Rykellus (Figs 89–92)

24. Dorsal shield fused with ventrianal shield................................................................ 25

- Dorsal shield not fused with ventrianal shield.............................................................. 34

25. Opisthogaster with incisions behind coxa IV directed almost transversely; dorsal shield setae fine, smooth and pointed except j 1 aciculate, z 4, z 5 and r 3 distally pilose................................................... Pyriphis (Figs 93–96)

- Opisthogaster with incisions behind coxa IV directed strongly posteriorly, if transversely then most dorsal shield setae acicu- late or pilose....................................................................................... 26

26. Dorsal shield with 50 or more pairs of setae............................................... Caliphis (Figs 97–100)

- Dorsal shield with 45 or fewer pairs of setae.............................................................. 27

27. Sternal shield fused with endopodal shield near coxa IV..................................................... 28

- Sternal shield not fused or fused only by a narrow strip to endopodal shield near coxa IV.......................... 30

28. Exopodal shields near coxae II–III–III fused; with 0–3 pairs of presternal plates.............. Gamasiphis (Figs 101–104)

- Exopodal shields near coxae II–III–III divided at median level of coxa III; with one pair of presternal plates........... 29

29. Dorsal and ventrianal shields with some pilose setae....................................... Cymiphis (Figs 105–108)

- Dorsal and ventrianal shields with all setae smooth..................................... Heydeniella (Figs 109–112)

30. Peritrematal shield fused with exopodal shield near coxa IV.................................................. 31

- Peritrematal shield not fused with exopodal shield near coxa IV............................................... 33

31. With one pair of presternal plates................................................... Ologamasus (Figs 113–116)

- With two pairs of presternal plates....................................................................... 32

32. Setae st 1– st 4 in longitudinal line or st 4 slightly laterad to imaginary line between st 1– st 3; tibia IV with nine setae..................................................................................... Hydrogamasus (Figs 117–120)

- Seta st 3 mediad to imaginary line between st 1, st 2 and st 4; tibia IV with ten setae...... Gamasiphoides (part) (Figs 121–124)

33. With two pairs of presternal plates; peritreme extending anteriorly to region of coxa I......... Laelaptiella (Figs 125–128)

- With one pair of presternal plates; peritreme extending anteriorly to median region of coxa II.... Stylochirus (Figs 129–131)

34. Outer margin of peritreme crenated............................................... Antennolaelaps (Figs 132–135)

- Outer margin of peritreme straight...................................................................... 35

35. Leg II greatly enlarged, tarsus and tibia II with cuticular apophyses and with some setae very heavy, thickened and spur-like............................................................................. Pachymasiphis (Figs 136–139)

- Leg II not greatly enlarged, tarsus and tibia II without very heavy, thickened and spur-like setae...................... 36

36. Genu I with 12 setae (two ventral setae)............................................ Gamasellopsis (Figs 140–143)

- Genu I with 13 setae (three ventral setae)................................................................. 37

37. Peritrematal shield not fused with exopodal shield.......................................................... 38

- Peritrematal shield fused with exopodal shield............................................................. 41

38. Sternal shield not fused with endopodal shield near coxa IV; epistome with a club-shaped anterocentral extension................................................................................... Neogamasellevans (Figs 144–147)

- Sternal shield fused with endopodal shield near coxa IV shield; epistome without a club-shaped anterocentral extension... 39

39. Pretarsus I sessile................................................................ Sessiluncus (Figs 156–159)

- Pretarsus I pedunculate............................................................................... 40

40. Genu III with nine setae (two ventral setae) and genu IV with ten setae (five dorsal and two ventral setae)............................................................................................ Onchogamasus (Figs 148–151)

- Genu III with eight setae (one ventral seta) and genu IV with eight or nine setae (four or five dorsal and one ventral setae)................................................................................... Gamasitus (Figs 152–155)

41. With two pairs of presternal plates........................................... Gamasiphoides (part) (Figs 160–163)

- With one pair of presternal plates, partially fused or not fused to sternal shield................................... 42

42. Sternal shield fused with endopodal shield near coxa IV......................... Queenslandolaelaps (Figs 164–167)

- Sternal shield not fused with endopodal shield near coxa IV.................................................. 43

43. Epistome with a club-shaped anteromedian extension; connection between peritrematal and exopodal shields behind stigma narrower than peritreme..................................................... Geogamasus (part) (Figs 168–171)

- Epistome without a club-shaped anteromedian extension; connection between peritrematal and exopodal shields behind stigma wider or narrower than peritreme....................................................................... 44

44. Pretarsus I not pedunculate and subequal to other pretarsi............................... Parasitiphis (Figs 172–175)

- Pretarsus I pedunculate and smaller than other pretarsi....................................................... 45

45. Insemination pore located on trochanter III............................................. Athiasella (Figs 176–179)

- Insemination pore located on coxa III........................................... Hydrogamasellus (Figs 180–183)