Mixozercon

Díaz-Aguilar, Irma & Ujvári, Zsolt, 2010, New zerconid mites (Acari: Mesostigmata: Zerconidae) from Canada, with a review of the genus Mixozercon Halašková, 1963, Zootaxa 2555, pp. 1-29 : 15-16

Key to the females of the genus Mixozercon

1. Opisthonotal J-, Z- and S-setae situated on small setal bases....................................................................................... 2

- Opisthonotal J-, Z- and S-setae situated on enlarged setal bases ( Figs 25, 26, 27 ) ...................................................... 4

2. Setae J1-J2 and Z1 smooth; dorsal cavities saddle-like, with smooth anterior margin ................................................ 3

- Setae J1-J2 and Z1 pilose; dorsal cavities with undulate anterior margin................ Mixozercon stellifer ( Aoki, 1964)

3. Setae J3-J4 pilose, similar in shape and length to J5 ....................................... Mixozercon sellnicki ( Schweizer, 1948)

- Setae J3-J4 smooth, distinctly shorter than J5 .................................................. Mixozercon heterosetosus Balan, 1995

4. Setae J1 and Z1 smooth; posterior ends of peritrematal shield truncated between the level of R1 and R2, straight ....................................................................................................................................................................................... 5

- Setae J1 and Z1 pilose; posterior ends of peritrematal shield expanded beyond the level of R3, rounded ( Figs 7 , 8 ) .. ...................................................................................................................................... Mixozercon jasoniana sp. nov.

5. Post-genital sclerites present; setae J5 inserted anterior to dorsal cavities, their tips not reaching posterior margin of idiosoma; J setae region ornamented with irregular pits or depressions ( Figs 1 , 25 ) ..................................................... ................................................................................................................................... Mixozercon albertaensis sp. nov.

- Post-genital sclerites absent; setae J5 inserted between outer dorsal cavities, their tips reaching slightly beyond posterior margin of idiosoma; J setae region with subtriangular ornamentation arranged in circles ( Figs 12 , 27 ) .......................................................................................................................................... Mixozercon borealis sp. nov.

Figures

FIGURE 1. Mixozercon albertaensis sp. nov., dorsal view of female.

FIGURE 7. Mixozercon jasoniana sp. nov., dorsal view of female.

FIGURE 12. Mixozercon borealis sp. nov., dorsal view of female.

FIGURES 25 – 28. Central surface of opisthonotum of the new species, SEM photos (scale bar 25 µm). 25. Mixozercon albertaensis sp. nov.; 26. Mixozercon jasoniana sp. nov.; 27. Mixozercon borealis sp. nov.; 28. Boreozercon emendi sp. nov.

FIGURES 8 – 11. Mixozercon jasoniana sp. nov. 8. Ventral view of female; 9. Dorsal view of male; 10. Ventral view of male; 11. Dorsal view of deutonymph.