Euseius dossei (Pritchard & Baker)

Moraes, G. J. De, Ueckermann, E. A., Oliveira, A. R. & Yaninek, J. S., 2001, Phytoseiid mites of the genus Euseius (Acari: Phytoseiidae) from Sub­Saharan Africa, Zootaxa 3, pp. 1-70 : 17-19

Euseius dossei (Pritchard & Baker) ( Fig. 9 )

Amblyseius (Amblyseius) dossei Pritchard & Baker, 1962: 286 ; Ueckermann & Loots, 1988: 110 Euseius dossei, Moraes et al., 1989 b: 83

FEMALE (Specimens measured – Benin: 1, Burundi: 3, Ghana: 2, Kenya: 3, Rwanda: 1, Sierra Leone: 2, Uganda: 5, Zaire: 2).

Dorsum ­ Dorsal shield with few lateral striae anterior to S2, 324(288­341) long, 243(202­264) wide. Setae j1 32(26­37), j3 30(21­35), j4 and j5 10(8­14), j6 11(8­16), J2 12(8­16), J5 6(5­8), z2 25(14­34), z4 30(16­38), z5 10(6­14), Z1 13(10­21), Z4 14(8­26), Z5 75(62­86), s4 50(34­59), S2 22(14­35), S4 24(14­35), S5 21(11­38), r3 13(10­19), R1 11(8­13). Dorsal setae smooth, except Z5 which are serrate.

Peritreme ­ Reaching level of between j3 and z2.

Venter ­ Ventral shields smooth, except for few striae on the anterior region of the ventrianal shield. Distances between ST1­ST3 56(51­59), ST2­ST2 66(62­70) and ST5­ ST5 73(59­82). With 2 pairs of metapodal shields. Ventrianal shield 52(46­58) long, 70(62­77) wide at ZV2 level and 101(91­110) wide at anus level.

Spermatheca ­ Calyx trumpet­shaped, 15(10­19) long; atrium small.

Legs ­ Macroseta of leg I sharp­tipped, macrosetae of other legs knobbed: SgeI 28(24­ 32), SgeII 28(19­34), SgeIII 38(24­43), StiIII 24(19­29), SgeIV 57(43­62), StiIV 35(27­ 40), StIV 68(56­82).

REMARKS: Some of the specimens collected in Uganda were noticeably smaller than other specimens of this species and had concurrently proportionally shorter setae; other characteristics of those specimens were similar to the type specimens.

SPECIMENS EXAMINED: Benin: Agbotagon, on Macrosphygma longistyla, 12­ VIII­91, B. Eklou. Burundi: 3 km N. Minago, Burari, on Elaeis guineensis and Setaria sp., 14­XII­89, J.S. Yaninek; 3 km N. Nyanza Lake, on Citrus sp., 14­XII­89, J.S. Yaninek; Ghana: Atimpoku, near Volta River bridge, Eastern Region, on unidentified plant, 13­XI­ 89, G.J. Moraes; 400 m N Adomi bridge, Atimpoku, on Cassia sp., 18­XI­89, G.J. Moraes. Kenya: 6.5 km S. Mombasa, Coast Province, on Anacardium occidentale , 28­XI­89, J.S. Yaninek; 28 km S. Mombasa, Coast Province, on Citrus sp., 28­XI­89, J.S. Yaninek; 14 km W. Kwale, on Mangifera indica , 29­XI­89, J.S. Yaninek. Rwanda: 6 km N. Kubungo, on Musa sapientum , 3­XII­89, J.S. Yaninek. Sierra Leone: Mange, on Elaeis guineensis , 17­XII­91, B. Christensen; Luzar I. Hospital, on Mangifera indica , 16­XII­91, B. Christensen. Uganda: Nile River, at Masindi, on Bignoniaceae , 12­X­90, J.S. Yaninek; 22 km N. Bundiburgo, on Theobroma cacao , 9­X­90, J.S. Yaninek; 7 km W. Busemba, Iganga, on Hibiscus esculentus , 5­XII­90, Tumuhate; 16 km E. Bushenyi, Kakunyo, on Citrus sp., 7­X­90, B. Odoungo. Zaire: 34 km E. Matadi, Kenge, Bas­Zaire, 11­VII­91, A. Onzo; 3 km N. Masi­Manimba, on Hymenocardia acida , 26­VI­91, A. Onzo.

Figures

FIGURE 9. Euseius dossei (Pritchard & Baker) (female): A. Dorsal shield; B. Ventral surface; C. Chelicera; D. Spermatheca; E. Leg IV.