Occurrence of aquatic oribatid and astigmatid mites in swimming pools

Occurrence of the oribatid mite Trhypochthoniellus longisetus longisetus (Acari: Trhypochthoniidae) on tilapia Oreochromis niloticus

“…The subspecies T. longisetus longisetus (junior synonym of T. crassus [Warburton & Pearce 1905]; Hydronothrus crispus [Aoki 1964]; Hydronothrus aquariorum [Fain & Lambrechts 1987]; Trhypochthonius setosus [Willmann 1928]; in addition to other synonymous names, Subías 2010) is commonly found in vegetation at the edge of lakes and ponds, where it seems to feed primarily on cellulose of living green plants or decaying vegetation, such as dead leaves of Hibiscus tiliaceus (Aoki 1964). This oribatid mite is widespread, extremely common in aquatic habitats that are rich in organic material, such as some natural freshwater, mires, high-mounted drinking-water tanks, and swimming pools (Tagami et al 1992, Kuriki 2005, Perotti et al 2009). In fact, because it is a common contaminant in indoor pools in some countries, such as Japan, it has recently been considered to be an allergen of public health significance (Robinson 2005).…”

Oribatid Mites from Several Mires in Northern Japan I. Two New Species of the Genus Trhypochthoniellus (Acari: Oribatida)

“…mires (Kuriki and Aoki, 1989;Kuriki, 1993Kuriki, , 1995aKuriki, , b, 1996aKuriki, , b, c, 1998Kuriki, , 1999Kuriki and Yoshida, 1999), T. ashoroensis Fujikawa, 2000 andT. porticus Fujikawa, 2000 from soil layers in a natural forest in Hokkaido and soil around roots of Typha orientalis in water of a basin in Fukushima, respectively (Fujikawa, 2000), T. longisetus longisetus (Berlese, 1904) from high-mounted drinking water tanks (Asanuma et al, 1988), swimming pools (Tagami et al, 1992) and moss cushions growing on city constructions (Aoki, 2000). By a systematic, synonimical and biogeographical check of the world's oribatid mites , Subias (2004) put the specimens of the genus Trhypochthoniellus into five species and two subspecies.…”