Euseius rhusi

De Moraes, G. J., Zannou, I. D., Oliveira, A. R., Yaninek, J. S. & Hanna, R., 2006, Phytoseiid mites of the subtribes Typhlodromalina and Euseiina (Acari: Phytoseiidae: Euseiini) from sub­Saharan Africa, Zootaxa 1114, pp. 1-52 : 48-49

Euseius rhusi (Van der Merwe) ( Fig. 24 )

Amblyseius (Amblyseius) rhusi Van der Merwe, 1965: 63 Euseius rhusi, Moraes et al. 1986: 52

Typhlodromalus rhusi, Moraes et al., 2004: 203 Euseius rhusi, Chant & McMurtry, 2005a: 215

FEMALE — (Specimens measured — Burundi: 1; Kenya: 4; Rwanda: 3).

Dorsum — Dorsal shield mostly smooth, with few striae along anterolateral margins, 367(336–384) long and 264(238–285) wide. Setae j1 25(21–27), j3 10(10–13), j4 8(5–10), j5 7(5–10), j6 9(8–11), J2 10(8–11), J5 8(6–10), z2 11(8–14), z4 11(8–14), z5 9(6–10), Z1 11(8–14), Z4 26, Z5 36(34–38), s4 18, S2 18, S4 16, S5 15 (14–15), r3 15(14–15), R1 13(13–14). All setae smooth.

Peritreme — Extending almost to j1.

Venter — Sternal shield with tridentate median lobe on posterior margin. Distances between St1–St3 62(58–66), St2–St2 66(62–72), St5–St5 78(70–86). Ventrianal shield 104(96–112) long, 58(53–62) wide at level of Zv2 and 65(58–72) wide at level of anus, with a pair of large pores posteromesad of Jv2. One pair of metapodal shields; caudoventral setae smooth and sharp­tipped.

Chelicera — Movable digit 30 long, with 1 small tooth; fixed digit 27(25–28) long, with 3 small teeth and a clearly distinguishable pilus dentilis.

Spermatheca — Calyx mostly slender, bulged near atrium and flared distally, 42(38– 45) long; atrium distinct.

Legs — Macrosetae sharp­tipped; Sge II 22 (19–24), Sge III 37 (35–40), Sti III 29 (26– 32), Sge IV 66 (61–70), Sti IV 56 (51–62), St IV 63 (53–72). Chaetotaxy of genu III: 1­2/ 1,2/0­1

MALE — (Specimens measured — Kenya 3; Rwanda: 1).

Dorsum — Dorsal shield pattern as in female, 268(263–273) long and 208(195–218) wide. Setae j1 23(23–25), j3 8, j4 5(5–6), j5 5, j6 6(5–8), J2 8, J5 5, z2 8(8–10), z4 9(8– 10), z5 5(5–6), Z1 8(8–10), Z4 9(8–10), Z5 26(24–28), s4 12 (10–13), S2 10 (9–10), S4 8 (8–10), S5 8, r3 11(10–13), R1 10(8–13). All setae smooth.

Peritreme — Extending to level of z2.

Venter — Ventrianal shield subtriangular, with transversal striae anteriorly and with a constriction at level of anus; 108(100–115) long, 164(160–168) wide at the anterior corners; with 3 pairs of preanal setae, 4 pairs of lyrifissures (1 anterior to Jv1 and 3 anterolateral) and a pair of large pores posterior to Jv2.

Spermatodactyl — Shaft 25(23–26) long.

Legs — Macrosetae sharp­tipped; Sge II 25, Sge III 34 (30–38), Sti III 30 (28–33), Sge IV 53, Sti IV 43 (38–49) and St IV 54 (50–58). Chaetotaxy of genu III same as in female.

SPECIMENS EXAMINED ­ Burundi: 16 km S Rutana, ISABU­MOSO, on unknown plant, 13­XII­1989, J.S. Yaninek. Kenya: 16 km W Maseno, Nyanza Province, on Psidium guajava , 02­XII­1989, J.S. Yaninek; 30 km W Yala, Siaya District, on unknown plant, 02­XII­1989, J.S. Yaninek; 10 km E Kisii, on unknown plant, 03­XII­1989, J.S. Yaninek; Kisumu District, Ricinus communis , 03­XII­1989, J.S. Yaninek. Rwanda: 35 km SE Ruhonzri, Gakonki village, on Persea americana , 08­XII­1989 J.S. Yaninek; unknown locality, on Vernonia amygdalina , 08­XII­1989, S.J. Yaninek; 13 km SE Kigali, Prefecture of Kigali, on R. communis , 09­XII­1989, J.S. Yaninek.

WORLD DISTRIBUTION — Burundi, Kenya, Mozambique, Reunion Island, Rwanda, South Africa.

Figures

FIGURE 24. Euseius rhusi (Van der Merwe): A. Female dorsal shield; B. Female ventral surface; C. Spermatheca; D. Female chelicera; E. Female leg IV; F. Spermatodactyl; G. Male ventrianal shield.