Euseius concordis

Lopes, Paula C., Mcmurtry, James A. & De Moraes, Gilberto J., 2015, Definition of the concordis species group of the genus Euseius (Acari: Phytoseiidae), with a morphological reassessment of the species included, Zootaxa 4048 (2), pp. 174-190 : 187

Key for the separation of females of the species of the concordis species group

1. Seta R1 usually inserted in the dorsal shield (at least in one side); s4 approximately twice as long as z4; leg IV macrosetae dis- tally truncate to swollen........................................................................ E. emanus

- Seta R1 inserted in the unsclerotised cuticle; s4 1.1 –2.5 times as long as z4; leg IV macrosetae varying from sharply pointed to swollen distally....................................................................................... 2

2. Leg IV macrosetae sharp-tipped; dorsal shield with or without distinct reticulation in opistonotal region................. 3

- Leg IV macrosetae blunt to swollen distally; dorsal shield without distinct reticulation in opistonotal region.............. 8

3. Opistonotal region of dorsal shield smooth................................................................. 4

- Opistonotal region of dorsal shield reticulate............................................................... 5

4. Spermathecal calyx with uniform diameter; Z5 about 2.3 times as long as S5; StIV about 1.3 times as long as s4................................................................................................... E. brevifistulae

- Spermathecal calyx with distinct constriction near vesicle; Z5 about 3.8 times as long as S5; StIV about 2.5 times as long as s4........................................................................................... E. neolokele

5 Seta r3 usually inserted in the dorsal shield; peritreme extending at most to level of z2..................... E. tularensis

- Seta r3 inserted in unsclerotised cuticle; peritreme extending distinctly beyond the level of z2........................ 6

6. Seta Z5 about 4.8 times as long as j6 and J2; peritreme extending to the region between j3 and z2................ E. vivax

- Seta Z5 at most 4.0 times as long as j6 and at most 3.8 times as long as J2; peritreme extending to level of j3............ 7

7. Seta z4 at least 1.2 times as long as z2; SgeIV on the average 54 µm in length (at least 46 µm)................. E. hibisci

- Setae z2 and z4 approximately of the same lengths; SgeIV on the average 43 µm in length (maximum 47 µm)... E. quetzali

8. Macrosetae of genu, tibia and tarsus IV of similar lengths (25–28 µm); calyx of spermatheca about 8 µm long.. E. passiflorus

- Macrosetae of tibia IV distinctly shorter than other macrosetae; calyx of spermatheca at least 11 µm long............... 9

9. Setae j3 and s4 at most 25 µm long.......................................... E. mesembrinus (= E. ho, E. brazilli )

- Setae j3 and s4 at least 33 µm long....................................................................... 10

10. Leg IV macrosetae with swollen tips................................... E. concordis (= E. flechtmanni , E. caseariae )

- Leg IV macrosetae blunt or sharp-tipped.................................................................. 11

11. Calyx of the spermatheca about straight, about five times as long as its uniform diameter................... E. stipulatus

- Calyx of the spermatheca distinctly curved, slightly narrower near vesicle and about 6–7 times as long as its diameter at mid length.................................................................................... E. fructicolus