Belongs within: Hydrachnidia.Contains: Eylais. The Protohydrachnidia are a clade of water mites in which the lateral eyes lack muscles, the last pair of idiosomal dorsoventral muscles are arranged in a median position, and the ejaculatory complex has the distal-sclerite arms and apical setae reduced. They include the Hydrovolzioidea which have small, inconspicuous genital acetabula positioned… Continue reading Protohydrachnidia


Belongs within: Parasitengonina.Contains: Erythraeinae, Balaustiinae, Callidosomatinae, Leptus, Smaridinae. The Erythraeoidea are a group of mites in which the adults and nymphs are predatory. The larvae are generally parasitic on other arthropods, though a few species are known to feed on pollen. Living erythraeoids are divided between the two families Smarididae and Erythraeidae. Adults of the… Continue reading Erythraeoidea


Belongs within: Prostigmata.Contains: Erythraeoidea, Hydrachnidia, Trombellidae, Leeuwenhoekiidae, Johnstonianidae, Neothrombiidae, Chyzeriidae, Trombidiidae, Microtrombidiidae, Trombiculidae. The Parasitengonina are a diverse group of mites with parasitic larvae and predatory deutonymphs and adults, with the active instars separated by inactive calyptostatic stages. They include both terrestrial and aquatic species with authors disagreeing whether or not the aquatic Hydrachnidia represent… Continue reading Parasitengonina


Belongs within: Erythraeoidea. The Smaridinae are a group of predatory mites with a deeply retractable gnathosoma and sensillary areas well behind the eyes. Members of the genus Smaris possess dorsal and ventral shields on the idiosoma, obliterating the crista, whereas such shields are absent in the genera Kraussiana and Fessonia. A distinct crista is present… Continue reading Smaridinae


Belongs within: Erythraeoidea.Contains: Abrolophus, Charletonia. The Callidosomatinae are a group of erythraeid mites whose adults have the eyes placed behind the midpoint of the crista and lack sensory pits on the body. Larvae have a square or rounded dorsal scutum. In members of the tribe Callidosomatini, the adults possess tubercles towards the distal end of… Continue reading Callidosomatinae


Belongs within: Erythraeoidea. Leptus is a cosmopolitan genus of erythraeid mites in which adults have the single pair of eyes placed relatively close to the front of the main body. The idiosoma is distinctly bushy and usually darkly coloured (Walter et al. 2009). Larvae have a triangular scutum that is widest anteriorly. They are found… Continue reading Leptus


Belongs within: Trombidiidae. The Allothrombiinae are a cosmopolitan group of trombidiid mites characterised by the presence in adults of a brush-like empodium in association with the tarsal claws. The colourful adults include some of the largest known mites (Walter et al. 2009). Characters (from Thor 1935): Adult large, with strong shoulders, rounded, with bristle-like plumose,… Continue reading Allothrombiinae


Belongs within: Parasitengonina.Contains: Enemothrombium, Eutrombidium, Microtrombidium, Platytrombidium, Camerotrombidium, Manriquia. The Microtrombidiidae are a cosmopolitan group of predatory mites with the palptibia of adults bearing multiple spinose setae alongside the terminal claw, and with larvae parasitic on Diptera. A large plate is present posteriorly on the idionotum in adults of the subfamily Eutrombidiinae but absent in… Continue reading Microtrombidiidae


Belongs within: Microtrombidiidae. Microtrombidium is a cosmopolitan genus of predatory mites, primarily recognised from adults with the larva of M. nitidum only described in 1994. Though numerous species have been assigned to the genus historically, the position of many requires further assessment (Southcott 1994). The European effective type species M. pusillum is characterised by as… Continue reading Microtrombidium


Belongs within: Hydryphantidae. Wandesia is a genus of elongate-bodied water mites with widely separated coxae and lacking dorsal plates or genital flaps. <==Wandesia Schechtel 1912RFF05 | i. s.: W. cavecerberumGS96 | W. saginataGS96 | W. troma Cook 1986H98 |–W. (Wandesia)S86 | |–W. (W.) centensis Habeeb 1973S86 | |–W. (W.) extendens Cook 1980S86 | |–W. (W.)… Continue reading Wandesia