Cytogenetical study and phylogenetic reflections on the family Tetranychidae Donnodieu
1970 - Volume: 12 Issue: 4 pages: 732-751
Etude cytogenetique et refexions phylogenetiques sur la famille des Tetranychidae Donnadieu. - After an introductory recapitulation of sorne particularities of the reproduction in Tetranychidae, the authors present 2 tables containing the results of investigations on the chromosome complement in 59 species of this family. The tables are also providecl with comments and a scheme of possible relations between the different caryotypes is suggested. In addition to the discussion of cytogenetics, notes are also made on the morphology, physiology and ethology in order to try to establish phylogenetical. relationships between the main groups of the family. As for the subfamily Bryobiinae, it is thus concluded that its most primitive stage is represented by the tribe Bryobiini, followed directly by Histrichonychini. The Petrobiini, on the other hand, represents its highest developed tribe. In the subfamily Tetranychinae, however, Tenuipalpoidini are more primitive than E$trytetranychini and the most advanced evolutional stage is represented by Tetranychini. Finally, a diagram of relations between the genera of Tetranychini, as investigated in the present paper, suggests that this tribe consists of 2 different phyla, the development of which has lead each to the genus Eotetranychus and Tetranychus respectively.
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