Eviphididae

Halliday, R. B., 2010, Revision of the Australian Eviphididae (Acari: Mesostigmata) 2596, Zootaxa 2596 (1), pp. 1-60 : 6-7

Key to the Australian genera and species of Eviphididae (adult females)

1. Palp genu with five setae, al 2 absent; femur II with one anterolateral seta; femur III with two ventral setae; sternal shield absent or reduced, represented only by small platelets or shield fragments bearing at most two pairs of setae.. ...................................................................................................................................................... Thinoseius Halbert ...2

- Palp genu with six setae, al 2 present; femur II with two anterolateral setae; femur III with one ventral seta; sternal shield well developed and entire, well sclerotised, with three pairs of setae................................................................6

2. Anal shield surrounded by a heavily sclerotised and strongly ornamented area of cuticle resembling a ventri-anal shield, bearing at least three pairs of setae in addition to the para-anal and post-anal setae ( Figs 89 , 96 , 100, 102 )...3

- Anal shield surrounded by soft striated skin, bearing only one pair of para-anal setae and unpaired post-anal seta ( Figs 54 , 71 , 105 ) .......................................................................................................................................................... 4

3. First pair of sternal setae and first pair of sternal lyrifissures inserted on a sclerotised plate ( Fig. 89 ); skin surrounding posterior half of dorsal shield sclerotised and strongly papillate ( Figs 88 , 101 ) ................ ...................................................... ...................................................................... Thinoseius papillatus sp. nov. (p. 46)

- First pair of sternal setae and first pair of sternal lyrifissures inserted in soft skin ( Fig. 96 ); skin surrounding posterior half of dorsal shield unsclerotised, striated ( Fig. 103 ) ............................................ Thinoseius peltatus sp. nov. (p. 48)

4. Sternal shield reduced to one or two small but distinct rounded fragments between coxae II, bearing one pair of setae and one pair of lyrifissures ( Figs 105, 106 ) ......................................................... Thinoseius variabilis sp. nov. (p. 51)

- Sternal shield more extensive, with one or two pairs of setae and two pairs of lyrifissures; posterior margin of shield extending beyond mid-level of coxae II either laterally ( Figs 54 , 60–63 ) or medially ( Fig. 71 ) ................................. 5

5. Sternal shield distinctly sclerotised, with polygonal ornamentation, bearing two pairs of setae and two pairs of lyrifissures; posterior margin irregular to deeply excavated medially ( Figs 54 , 60–63 ) .................................................... .. ............................................................................................................................. Thinoseius helenae sp. nov. (p. 35)

- Sternal shield with distinctly sclerotised anterior section bearing one pair of setae and one pair of lyrifissures; posterior section variably sclerotised, its tapering posterior margin extending medially as far as mid-level of coxae III ( Fig. 71 ) .................................................................................................................... Thinoseius jarretti sp. nov. (p. 40)

6. Trochanter I with five setae (1 0/1 0/2 1); genu III with one ventral seta; body highly arched, almost hemispherical.. ............................................................................................................................................................. Evimirus Karg ...7

- Trochanter I with six setae (1 0/1 1/2 1); genu III with two ventral setae; body not highly arched ............................. 9

7. Epigynal shield at widest point wider than anal shield ......................................... Evimirus uropodinus Berlese (p. 18)

- Epigynal shield at widest point narrower than anal shield............................................................................................ 8

8. Opisthogastric skin behind coxa IV with a large triangular plate and two minute circular platelets ............................. ................................................................................................................................. Evimirus pentagonius Karg (p. 13)

- Opisthogastric skin behind coxa IV with two minute circular platelets only, large triangular plate absent ( Fig. 14 ).... ............................................................................................................................... Evimirus scutellatus sp. nov. (p. 15)

9. Epigynal setae inserted in soft skin outside epigynal shield; palp tarsi each with two long sinuous sensory setae (macroeupathidia) .............................................................................................................. Scarabaspis Womersley ...11

- Epigynal setae inserted on epigynal shield; palp tarsi without long sinuous sensory setae ............ Alliphis Halbert ...10

10. First pair of sternal lyrifissures large, oriented transverse to body axis; metasternal pores and metasternal setae inserted separately in soft skin ( Fig. 2 ) .................................................................... Alliphis transversus sp. nov. (p. 8)

- First pair of sternal lyrifissures small, oriented obliquely to body axis; metasternal setae and metasternal pores inserted together on metasternal platelets .................................................... Alliphis halleri (G. & R. Canestrini) (p. 7)

11. Coxa I with both setae pointed, setiform ( Fig. 19 ) ............................................... Scarabaspis masani sp. nov. (p. 18)

- Coxa I with at least one seta modified into a flat oval-shaped disk............................................................................ 12

12. Coxa I with only one seta modified into a flat oval-shaped disk; the other seta normal, setiform ( Figs 46 , 48 ) ........... ......................................................................................................................... Scarabaspis victoriensis sp. nov. (p. 30)

- Coxa I with both setae modified into flat oval-shaped disks ( Figs 31 , 43 )................................................................. 13

13. Metasternal pores located on posterior margin of sternal shield ( Fig. 31 ); dorsal shield setae r3 (humeral setae) thick, spinose, erect ( Fig. 30 ) ........................................................................................ Scarabaspis sternalis sp. nov. (p. 22)

- Metasternal pores located in soft skin posterior to sternal shield; dorsal shield setae r 3 unmodified, similar to surrounding setae in form and orientation ............................................................ Scarabaspis orientalis (Berlese) (p. 21)

Figures

FIGURES 88–94. Thinoseius papillatus, female. 88, dorsal idiosoma; 89, ventral idiosoma; 90, hypostome; 91, epistome, three different specimens; 92, chelicera; 93, pre-tarsus III; 94, insemination ducts and sacculus foeminus. Scale bar = 100 µm for 88, 89; 50 µm for 90, 91, 92; 25 µm for 93, 94.

FIGURES 95–99. Thinoseius peltatus, female. 95, dorsal idiosoma; 96, ventral idiosoma; 97, hypostome; 98, epistome, three different specimens; 99, chelicera. Scale bar = 100 µm for 95, 96; 50 µm for 97, 98, 99.

FIGURES 100–103. Thinoseius spp., females. 100, T. papillatus, anal shield and surrounding opisthogaster; 101, T. papillatus, postero-dorsal opisthosomal skin; 102, T. peltatus, anal shield and surrounding opisthogaster; 103, T. peltatus, postero-dorsal opisthosomal skin. Scale bar = 100 µm for 100, 102; 50 µm for 101, 103.

FIGURES 53–59. Thinoseius helenae, female. 53, dorsal shield; 54, ventral idiosoma; 55, hypostome; 56, epistome; 57, chelicera; 58, pre-tarsus IV, 59, coxa III and insemination duct. Scale bar = 100 µm for 53, 54; 50 µm for 55, 56, 57, 59; 25 µm for 58.

FIGURES 70–75. Thinoseius jarretti, female. 70, dorsal shield; 71, ventral idiosoma; 72, hypostome; 73, epistome, four different specimens; 74, chelicera; 75, insemination ducts. Scale bar = 100 µm for 70, 71; 50 µm for 72, 73, 74, 75.

FIGURES 104–109. Thinoseius variabilis, female. 104, dorsal shield; 105, ventral idiosoma; 106, sternal shield, five different specimens; 107, hypostome; 108, epistome, four different specimens; 109, chelicera. Scale bar = 100 µm for 104, 105; 50 µm for 106, 107, 108, 109.

FIGURES 60–63. Thinoseius helenae, female, sternal shield. Four different specimens from Wright Bay, South Australia. Scale bar = 50 µm.

FIGURES 13–17. Evimirus scutellatus, female. 13, dorsal shield; 14, ventral idiosoma; 15, hypostome; 16, epistome; 17, chelicera. Scale bar = 100 µm for 13, 14; 50 µm for 15, 16, 17.

FIGURES 1–8. Alliphis transversus. 1, female, dorsal shield; 2, female, ventral idiosoma; 3, female, hypostome; 4, female, epistome; 5, female, chelicera; 6, female, insemination ducts; 7, male, ventral idiosoma; 8, male, chelicera. Scale bar = 100 µm for 1, 2, 7; 50 µm for 3, 4, 5, 8; 25 µm for 6.

FIGURES 18–23. Scarabaspis masani, female. 18, dorsal shield; 19, ventral idiosoma; 20, hypostome; 21, epistome; 22, chelicera; 23, insemination ducts. Scale bar = 100 µm for 18, 19; 50 µm for 20, 21, 22; 25 µm for 23.

FIGURES 43–46. Scarabaspis spp., coxa I. 43, S, sternalis, female; 44, S. sternalis, female, different specimen; 45, S. sternalis, deutonymph; 46, S. victoriensis, female. Proximal seta pv arrowed. Scale bar = 50 µm.

FIGURES 47–51. Scarabaspis victoriensis, female. 47, dorsal shield; 48, ventral idiosoma; 49, hypostome; 50, epistome; 51, chelicera. Scale bar = 100 µm for 47, 48; 50 µm for 49, 50, 51.

FIGURES 30–35. Scarabaspis sternalis, female. 30, dorsal shield; 31, ventral idiosoma; 32, hypostome; 33, epistome; 34, chelicera; 35, insemination ducts and coxae III. Scale bar = 100 µm for 30, 31; 50 µm for 32, 33, 34, 35.