Euseius citri
publication ID |
https://doi.org/ 10.5281/zenodo.4616491 |
DOI |
https://doi.org/10.5281/zenodo.4616520 |
persistent identifier |
https://treatment.plazi.org/id/0471C225-4060-FF9A-FEB2-AD3DFD529150 |
treatment provided by |
Guido |
scientific name |
Euseius citri |
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Euseius citri View in CoL ( Van der Merwe & Ryke ) ( Fig. 8 View FIGURE 8 )
Amblyseius (Typhlodromalus) citri Van der Merwe & Ryke, 1964: 273 . Amblyseius citri, McMurtry, 1980: 153
FEMALE (Specimens measured – South Africa: 10).
Dorsum – Dorsal shield lightly reticulated, 324 372 long and 211246 wide. Setae j1 3538, j3 3538, j4 1314, j5 1314, j6 22, J2 22, J5 6, z2 1622, z4 2835, z5 1316, Z1 19 22, Z4 2426, Z5 5460, s4 6165, S2 2224, S4 2226, S5 2223, r3 19, R1 13. Dorsal setae smooth, except Z5 which is serrated.
Peritreme – Reaching level of setae j3.
Venter – All ventral shield smooth. Distances between ST1ST3 6062, ST2ST2 66 68, ST5ST5 7981. A single metapodal shield. Ventrianal shield 108113 long, 6066 wide at ZV2 level and 7279 wide at anus level.
Chelicera – Movable digit 2627 long, with one tooth; fixed digit 2628 long, with 4 teeth.
Spermatheca – Calyx tubular, slightly bulged near atrium and slightly flared distally, 1923 long; atrium distinct.
Legs –Macrosetae sharptipped: Sge II 22, Sge III 2832, Sge IV 4760, Sti IV 41, St IV 57; chaetotaxy of genu II 22/0, 2/01, genu III 12/1,2/01.
MALE (Specimens measured – South Africa: 1).
Dorsum – Dorsal shield 277 long and 239 wide. Setae j1 32, j3 35, j4 13, j5 13, j6 19, J2 19, J5 6, z2 19, z4 28, z5 13, Z1 19, Z4 19, Z5 50, s4 50, S2 22, S4 22, S5 22, r3 16, R1 13.
Peritreme – Reaching level between z2 and z4.
Venter – Ventrianal shield 117 long, 217 wide at anterior corners.
Chelicera – Shaft of spermatodactyl 22 long.
Legs – Sge II 19, Sge III 22, Sge IV 41, Sti III 22, Sti IV 35, St IV 44.
REMARKS: Euseius citri is similar to E. addoensis ( Van der Merwe & Ryke ) and only differs in the length of seta Z4, that ranges from 2329 in E. citri and 1620 in E. addoensis . McMurtry (1980) conducted hybridization tests and showed that these two species are incompatible. E. citri can reduce the numbers of the citrus thrips Scirtothrips aurantii Faure on citrus in the northeastern provinces of South Africa and Swaziland, but does not occur in high enough numbers to be commercially effective (Grout 1994).
SPECIMENS EXAMINED: South Africa: Zebediela, Northern Province, on Citrus sp., 04III1985, E.A. Ueckermann.
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