Deutonymph
Guides
Euryparasitus
Euryparasitus is a genus of mesostigmatid mites in the family Ologamasidae, established by Oudemans in 1902. The genus comprises approximately 15 described species worldwide, with four species documented in North America. North American species are distinguished by morphological characters of the deutonymphal instar, particularly the presence or absence of barbed setae on the idiosoma, serrations on the gnathotectum, and differentiation of the acrotarsus on leg I.
Histiostoma
Histiostoma is a genus of astigmatan mites in the family Histiostomatidae, characterized by modified brush-like chelicerae adapted for filtering microbes from substrates. The genus exhibits remarkable ecological diversity, with species occupying habitats ranging from bark beetle galleries and insect associations to aquatic environments and decaying organic matter. Many species form heteromorphic deutonymphs (hypopi) specialized for phoretic dispersal on arthropod hosts. Histiostoma includes economically significant species such as H. feroniarum, a pest of cultivated mushrooms, and H. laboratorium, a notorious contaminant of Drosophila research cultures.