Eutarsopolipus, Berlese, 1913

Seeman, Owen D. & Katlav, Alihan, 2024, Podapolipid mites (Acari: Heterostigmata): key to genera, biogeographical history and description of four new Australian species of Eutarsopolipus, Zootaxa 5448 (3), pp. 301-347 : 340-342

Key to species groups and Australian species of Eutarsopolipus

(based on females)

The following key is based on the key to species groups presented in Seeman (2019a) and subsequent keys from Seeman (2019b, 2021) and Katlav et al. (2020, 2021). It presents all Eutarsopolipus species groups and all Australian species (unless otherwise mentioned). Larval females are sometimes needed to aid identifications.

1. Respiratory system (stigmata and tracheae) absent........................................................... 2

- Respiratory system (stigmata and tracheae) present.......................................................... 4

2. Genu II, III setae absent ( pterostichi species group)......................................................... 10

- Genu II, III setae present............................................................................... 3

3. With idiosomal plates; pretarsi usually with prominent claws ( ochoai species group).............................. 16

- Without idiosomal plates; pretarsi lacking claws ( stammeri species group, 1 sp., not Australian).................................................................................................... E. stammeri Regenfuss, 1968

4. Pretarsal claws II, III absent or rudimentary................................................................ 5

- Pretarsal claws II, III present, well developed.............................................................. 6

5. Pretarsal claws I absent................................................ biunguis species group (none Australian)

- Pretarsal claws I present............................................ acanthomus species group (none Australian)

6. Genua II, III setae present ( leytei species group)........................................................... 12

- Genua II, III setae absent............................................................................... 7

7. Two genu I setae...................................................................................... 8

- No genu I setae....................................................................................... 9

8. Three femur I setae (vʺ present) [Host: Catadromus lacordairei ].............. E. megacheli Husband & Macfarlane, 1999

- Two femur I setae (vʺ absent) [Host: Catadromus lacordairei ]............... E. secundus Husband & Macfarlane, 1999

9. Tarsus II solenidion present ( myzus species group).......................................................... 11

- Tarsus II solenidion absent.................................... E. lagenaeformis ( Berlese, 1911) (not Australasian)

10. Idiosomal setae v1, sc1, c1, c2, d, e thorn-like; pretarsi II, III lacking claws [Host: Nurus medius ]................................................................................................... E. echinatus Seeman, 2019a

- Idiosomal setae all slender; pretarsi II, III with rudimentary claws [Host: Geoscaptus laevissimus ]......................................................................................... E. paryavae Katlav & Hajiqanbar, 2021 .

11. Idiosomal setae short, thorn-like [Host: Chlaenius ophonoides ].................................. E. walteri sp. nov.

- Idiosomal setae slender [Host: Chlaenius flaviguttatus ...................... E. flaviguttatus Hajiqanbar & Katlav, 2021

12. Claw on legs I bifurcate............................................................................... 13

- Claw on legs I single................................................................................. 14

13. Setae sc2 short (15–20); tarsi II–III with setae tc′ short (3–7) and tc″ small (5–6) [Host: Notonomus transitus ]......................................................................................... E. biuncatus Seeman, 2021

- Setae sc2 longer (36–40); tarsi II–III with setae tc′ longer (8–11) and tc″ larger (8–9) [Host: Notonomus spp. ].............................................................................................. E. janus Seeman, 2021

14. Cheliceral stylets long (longer than 55), tibia I with one setae (l” absent) [Host: Coleolissus papua ]..................................................................................................... E. vepreculus sp. nov.

- Cheliceral stylets shorter (shorter than 50), tibia I with two setae (l” present)..................................... 15

15. Tarsi II–III setae u′ spine-like [Host: Gnathaphanus melbournensis ]................. E. orpheus Katlav & Seeman, 2020

- Tarsi II–III setae u′ trifurcate [Host: Gnathaphanus pulcher ].................... E. pulcher Seeman & Hajiqanbar, 2021

16. Claws absent on pretarsi II, III......................................................................... 17

- Claws present on pretarsi II, III......................................................................... 18

17. Tibia I lacking seta k; genua II, III bare, lacking seta lʹ [Host: Clivina quadratifrons ]........ E. olszanowskii Seeman, 2020

- Tibia I with seta k; genua II, III with seta lʹ [Host: Clivina procera ].......................... E. divisus Seeman, 2020

18. Pretarsus I lacking claw; tarsi II, III seta uʹ a large claw...................................................... 19

- Pretarsus II with claw; tarsi II, III seta uʹ spine-like......................................................... 21

19. Tarsi II, III with seta pl″ long (75–95) [Hosts: Castelnaudia eungella and C. wilsoni ]........ E. verberatus Seeman, 2019b

- Tarsi II–III with seta pl″ shorter (35–55).................................................................. 20

20. Setae v1 far apart in female (63–94) and male (46–51); seta tc″ on tarsi II, III comparatively large and thorn-like, length 4–5 [Host: Castelnaudia obscuripennis ]................................................. E. uncatus Seeman, 2019b

- Setae v1 closer together in female (47–58) and male (34–42); seta tc″ on tarsi II, III comparatively smaller and merely thickened, length 2–3 [Hosts: Trichosternus frater and T. mutates ]................................. E. piraticus Seeman, 2019b

21. Genu I with one seta (lʺ absent)........................................................................ 22

- Genu I with two setae (lʺ present)....................................................................... 23

22. Plate H present, setae h present but rudimentary [Host: Notonomus angustibasis ].................................................................................................... E. lambkinae Constantine & Seeman, 2014

- Plate H and seta h absent. [Host: Lecanomerus niger ].................................... E. ampullaceous sp. nov.

23. Tarsus II with solenidion [Host: Notolestus sulcipennis ]....................................... E. tripodus sp. nov.

- Tarsus II lacking solenidion............................................................................ 24

24. At least some idiosomal setae significantly thickened, sometimes bulbous....................................... 25

- All idiosomal setae slender............................................................................ 27

25. Setae sc1 sometimes thickened but not bulbous; anterior margin of prodorsal shield deeply concave [Host: Castelnaudia setosiceps ]....................................................................... E. hadros Seeman, 2021

- Setae sc1 strongly thickened to bulbous; anterior margin of prodorsal shield weakly concave or straight............... 26

26. Larvae with shorter setae c1 8–11, d 7–10, f 7–10; female generally with shorter dorsal setae: v1 7–10, c1 6–12, d 10–15, f 7–12. [Host: Castelnaudia cordata ].................................................... E. umbonatus Seeman, 2021

- Larvae with longer setae c1 13–20, d 11–12, f 14–19; female generally with longer dorsal setae: v1 10–13, c1 10–20, d 12–21, f 11–19. [Host: Castelnaudia mixta ]................................................... E. mixtus Seeman, 2021

27. Anterior tip of gnathosoma rounded..................................................................... 28

- Anterior tip of gnathosoma indented, giving a lip-like appearance............................................. 35

28. Setae h small but developed (larger than alveolus).......................................................... 29

- Setae h minute (not larger than alveolus) or absent.......................................................... 34

29. Gnathosoma large (66–70 long, 59–72 wide).............................................................. 30

- Gnathosoma smaller (53–61 long, 48–54 wide)............................................................ 32

30. Distance d–d <100 [Host: Cratoferonia phylarchus ]....................... E. earnshawi Constantine & Seeman, 2014

- Distance d–d 160–230................................................................................ 31

31. Setae v1 6–7, sc2 60–70; cheliceral seta 15–24 [Host: Castelnaudia septemcostata ]........... E. nahmani Seeman, 2021

- Setae v1 9–13, sc2 95–120; cheliceral seta 30–37 [Host: Nurus medius ]..................... E. burwelli Seeman, 2019a

32. Setae h small, 2–4 [Host: Castelnaudia septemcostata ].................................... E. raveni Seeman, 2021

- Setae h longer, 7–10................................................................................. 33

33. Setae d 25, f 22, strong, stiff; cheliceral stylets 60, cheliceral seta 42 [Host: Trichosternus subvirens ]................................................................................... E. rutherfordae Constantine & Seeman, 2014

- Setae d 18–19, f 15–18, slender; cheliceral stylets 75–82, cheliceral seta 20–27 [Host: Castelnaudia porphyriaca ]......................................................................................... E. teuceri Seeman, 2021

34. Gnathosoma large (61–65 long, 60–67 wide), cheliceral stylets 75–84, tarsi II, III seta tcʹʹ 3–4 [Host: Castelnaudia cordata ]............................................................................... E. hebronae Seeman, 2021

- Gnathosoma smaller (45–51 long, 47–51 wide), cheliceral stylets 50–55, tarsi II, III seta tcʹʹ 2–3 [Host: Castelnaudia porphyriaca ].................................................................. E. despoticus Seeman, 2021

35. Setae sc1 <10; distance d–d 90–105, f–f 75–92............................................................ 36

- Setae sc1> 15; distance d–d 135–150, f–f 100–120......................................................... 37

36. Setae c1 15–17, d 16–22; distance v2–v2 38–40; sc1–sc1 61–65; v1–sc1 16–20; tibia I seta v′ 2; genua II, III seta l′ minute [Host: Castelnaudia cordata ]............................................................ E. osculum Seeman, 2021

- Setae c1 6–9, d 7–9; distance v2–v2 48–62; sc1–sc1 82–100; v1–sc1 36–46; tibia I seta v′ 5–6; genua II, III seta l′ 3–4 [Host: Castelnaudia porphyriaca ]......................................................... E. basiatus Seeman, 2021

37. Cheliceral seta 24–39; larva with short setae c1 6–9, c2 9–12, d 7–10 [Host: Castelnaudia eungella ]................................................................................................... E. savatus Seeman, 2021

- Cheliceral seta 17–21; larva with longer setae c1 15–18, c2 19–24, d 17–19 [Host: Castelnaudia marginifera ]........................................................................................... E. labiatus Seeman, 2021