Abstract
The purpose of this paper is to lay the basis for some serious work on comparative acarinology. For this purpose a restricted group, the family Acaridae, has been selected and a detailed morphological study based on approximately 40 species, representative of the various genera of the family, is presented. It is hoped that this will demonstrate more clearly than has hitherto been done the significance, from the standpoint of classification and phylogeny, of the principal morphological characters present in this group of animals. The classifications of previous workers, particularly that of Oudemans', are briefly reviewed and evaluated in the light of present findings; a discussion of the composition and inter-relationships of the various genera and higher groups is given; and finally a synopsis of the tribes and genera of the family Acaridae, based on characters believed to be of phylogenetic significance, is presented.
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