Observations sur quelques Actinedida (= prostigmates) du sol d Amerique du Nord. 6. Sur deux especes nouvelles de Labidostommidae (Acari). - Description of two new species of Labidostommidae with a new genus (Akrostonuna) from Redwoods forests along the Pacifie Coast in California. The use of scanning electronic microscop allows to precise some special structures about N . fergusoni n. sp. Akrostomma grandjeani n. g. n. sp. is caracterised by an extreme reduction of eyes and the antiaxial cheliceral tooth and by the presence of one lateral pustule with only one pore. An important bibliography is given.
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