Phytoseiidae

Field: Agricultural and Biological Sciences (Life Sciences)

Key to Phytoseiidae mites found in vineyards of the State of Rio Grande do Sul, Brazil 1. Podonotal region of dorsal shield with four pairs of "lateral" setae: j3, z2, z4 and s4 .................... Amblyseiinae ...2 - Podonotal region of dorsal shield with six pairs of "lateral" setae: j3, z2, z3, z4, s4 and s6 present...... Typhlodrominae ...21 2. Setae j6 2–3 times longer than distance between their bases; ventrianal shield with one pair of pre-anal setae................................................................................................ Phytoseiulus macropilis - Setae j6 less than twice as long as distance between their bases; ventrianal shield with one, two or three pairs of pre-anal setae.................................................................................................... 3 3. Ratio of setae s4: Z1 <3.0:1.0; female ventrianal shield vase-shaped; setae s4, Z4 and Z5 not greatly longer than other dorsolateral setae............................................................................................. 4 - Ratio of setae s4: Z1> 3.0:1.0; female ventrianal shield pentagonal or vase-shaped; setae s4, Z4 and Z5 distinctly longer than other setae..........................................................................................13 4. Legs I, II and III usually without macrosetae; macrosetae present only on leg IV.................................... 5 - Legs I, II and III usually with macrosetae................................................................... 9 5. Spermatheca with atrium forked for at least half its length at junction with major duct, atrium appearing thick-walled......................................................................................... Neoseiulus transversus - Spermatheca with atrium not deeply forked at junction with neither major duct, not appearing thick-walled.............. 6 6. Dorsal setae strongly barbed................................................................ Neoseiulus tunus - Dorsal setae not strongly barbed (except Z4 and Z5).......................................................... 7 7. Most of the dorsal shield not reaching the basis of the next row............................... Neoseiulus californicus - Most dorsal shields setae long (around 40–60µm) often reaching the base of the next row............................ 8 8. Setae s4, Z4 and Z5 length 50, 65, 78 respectively; macrosetae present only on tarsus IV............. Neoseiulus anonymus - Setae s4, Z4 and Z5 length 28, 46, 64 respectively; macrosetae present only on genu, tibia and tarsus IV.... Neoseiulus fallacis 9. Setae JV1 inserted well behind anterior margin of shield; peritreme short, extending forward beyond base of setae z2 (except Euseius inouei)...................................................................................... 10 - Setae JV1 inserted on or near margin of ventrianal shield; peritreme extending as far as base of setae j1 ................12 10. Dorsal shield mostly smooth with few striae at anterolateral region...................................... Euseius ho - Dorsal shield reticulated............................................................................... 11 11. Setae r3 and R1 on dorsal shield; peritreme extending as far as the region between z2 and z4 ............. .. Euseius sibelius - Setae r3 and R1 outside dorsal shield; peritreme extending as far as the region between j1 and j3....... Euseius inouei 12. Dorsal shield with most setae serrated; setae j1, j3, z2, z4, Z1, Z4, Z5, s4, S2 and r3 considerably thickened............................................................................................. Typhlodromalus marmoreus - Dorsal shield with most setae smooth and tapered........................................... Typhlodromalus aripo 13. Setae J2 absent.................................................................. Proprioseiopsis cannaensis - Setae J2 present...................................................................................... 14 14. With an ectal strip on the peritrematal shield, extending along the exopodal shield and around it to the posterior end of coxa IV................................................................................................... 19 - Without ectal strip adjacent to peritrematal shield........................................................... 15 15. Ratio of seta s4: S2 <2.7: 1.0................................................................ Transeius lisei - Ratio of seta s4: S2> 3.0: 1.0.......................................................................... 16 16. Ventrianal shield vase-shaped, with distinct constriction behind seta JV3......................... Amblyseius herbicolus - Ventrianal shield never vase-shaped...................................................................... 17 17. Setae Z4 and Z5 length 120 and 197 respectively......................................... Amblyseius neochiapensis - Setae Z4 and Z5 length 138–214 and 305–442 respectively.................................................... 18 18. Spermatheca cervix saccular-fundibular, atrium bifid....................................... Amblyseius operculatus - Spermatheca cervix with bell-shaped, atrium nodular............................................. Amblyseius vitis 19. Without macrosetae on leg I, II and III; setae JV2 and ZV2 inserted in the normal position on the female ventrianal shield......................................................................................... Arrenoseius gaucho - With macrosetae on leg I, II and III; setae JV2 and ZV2 inserted on anterior one-third of the pre-anal area of the female ventri- anal shield.......................................................................................... 20 20. With a pair of metapodal plates on each side, movable digit of chelicera with three teeth............ Iphiseiodes saopaulus - With a single metapodal plate on each side, movable digit of chelicera with two teeth............. Iphiseiodes metapodalis 21. Setae S4 and JV4 present............................................................................... 22 - Setae S4 and JV4 absent............................................................................... 23 22. Setae on dorsal shield short, smooth, not knobbed........................................... Typhlodromus ornatus - Setae on dorsal shield long strongly serrated and knobbed.............................. Typhlodromus transvaalensis 23. Seta R1 absent; S2 present............................................................. Galendromus annectens - Seta R1 present; S2 absent..............................................................................24 24. Setae along margins of dorsal shield long, seta R1 much shorter than s6; setae S5 and Z5 approximately equal in length; inser- tions of JV1, JV3 and ZV2 aligned in nearly vertical rows on ventrianal shield; legs without macrosetae..................................................................................................... Typhlodromina tropica - Setae along margins of dorsal shield medium in length; R1 and s6 setae subequal in length, setae S5 usually much shorter than Z5; insertions of JV1, JV3 and ZV2 forming a triangle on ventrianal shield, leg IV with 0 to 3 macrosetae............... 25 25. Seta R1 inserted on dorsal shield........................................................ Metaseiulus mexicanus - Seta R1 inserted on lateral integument.................................................................... 26 26. Chaetotactic formula of genu II: 2, 2/1, 2/0, 1................................................ Metaseiulus cornus - Chaetotactic formula of genu II: 2, 2/0, 2/0, 1.............................................. Metaseiulus camelliae