Ologamasidae
Creators: name: Castilho, Raphael C.
name: Silva, Edmilson S.
name: De, Gilberto J.
name: Halliday, Bruce
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Ologamasidae

description: 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)
description: Published as part of Castilho, Raphael C., Silva, Edmilson S., De, Gilberto J. & Halliday, Bruce, 2016, Catalogue of the family Ologamasidae Ryke (Acari: Mesostigmata), pp. 1-147 in Zootaxa 4197 (1) on pages 23-25, DOI: 10.5281/zenodo.168445