Ontogeny, systematics and ecology ofSennertia (Amsennertia) americanaDelfinado & Baker, 1976 (Acari: Chaetodactylidae) from the nest of the carpenter bee,Xylocopa virginica(Hymenoptera: Anthophoridae)

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Abstract
All ontogenetic stages of Sennertia (Amsennertia) americana Delfinado and Baker, 1976, are described and illustrated. The genus Sennertia Oudemans, 1905, is redefined on the basis of four derived character states of the adults, one of the larva, and four ontogenetic characters. The family Chaetodactylidae is redefined based upon eleven derived morphological character states and five ontogenetic states. Ecological observations on S. americana suggest the species may be a cleptoparasite.