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Chromosomes in spider mites (Tetranychidae-Acari)

Bolland, H. ; Gutierrez, J. and Helle, W.

1981 - Volume: 22 Issue: 3 pages: 271-275


karyotypes taxonomy


The chromosomes of fifteen tetranychid species were studied in embryonic tissue cells in acetic-orcein squashes. All bisexual species exhibit a haplo-diploid sex determination, resulting from arrhenotokous parthenogenesis. The taxonomic significance of karyotype information is discussed in relation to the genera Oligonychus and Tetranychus. A diploid number of 2 n = 8 occur in Tetranychina moutiai, Oligonychus gramineus, O. leandrianae, O. plegas, Tetranychus jijiensis and T. marianae; of 2 n = 6 in Schizotetranychus reticulatus, Eotetranychus uncatus, Oligonychus thelytokus, Tetranychus Iambi, T. lombardinii, T. macfarlanei, T. yusti and T. lintearius; of 2 n = 4 in Eutetranychus africanus.

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1981 Bolland, H.; Gutierrez, J. and Helle, W.
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