26 Edaphologia, No. 105: 26–27, September 30, 2019 Fain, A. and van Goethem, J. L. 1986. Les acariens du genre Ric- Snail mite Riccardoella reaumuri cardoella Berlese, 1923 parasites du poumon de mollusques (Acariformes: Prostigmata: gastéropodes pulmonés terrestres. Acarologia, 27: 125–140. Ereynetidae) as free living Fain, A. and Klompen, J. S. H. 1990. Riccardoella (Proriccadoella) triodopsis nov. spec. (Acari: Ereynetidae) from the USA. from Shikoku Island, Japan. Acarologia, 31: 187–190. Nakamura, Y., Ishikawa, K., Shiba, M., Fujikawa, T., Ono, H., There are eight described species of mites belong to the Tamura H. and Morikawa, K. 2006. Soil animals of the 88 genus Riccardoella Berlese, 1923 (Ereynetidae Oudemans, BUDDHIST temples in Shikoku Islands. Memoirs of the Fac- 1931) in the world. A total of six species of the genus are ulty of Agriculture, Ehime University, 51: 25–48. known to infect lungs of terrestrial gastropods (Turk and Turk, F. A. and Phillips, S. 1946. A Monograph of the Slug Mite̶ Phillips 1946; Fain and van Goethem 1986; Fain and Klom- Riccardoella limacum (Schrank.). In Proceedings of the Zoo- pen 1990; Fain and Baker 2004; Waki et al. 2018a), and the logical Society of London, 115: 448–472. remaining two species (R. canadensis Fain & van Goethem, Waki, T., Shimano, S. and Hiruta, S. F. 2018a. A new species of 1986 and R. zadielensis André, Ducarme & Lebrun, 2004) the genus Riccardoella (Acari: Prostigmata: Ereynetidae) have been found and described from soil as free-living mites. from the land snail Tauphaedusa tau (Gastropoda: Clausli- In Japan, two parasitic species were collected and recorded idae) in Japan. Zootaxa, 4402: 163–174. from land snails (Waki et al., 2018a, b, 2019). On the other Waki, T., Shimano, S., Asami, T., Miyai, T. and Sasaki, T. 2018b. hands, Nakamura et al. (2006) sampled soil animals form Riccardoella reaumuri Fain & van Goethem, 1986 (Acari- several materials; i. e. soil, litter, mosses, bark, dead tree, in formes: Trombidiformes: Ereynetidae) from terrestrial mol- the Konsenji temple (temple #3 of the Shikoku eighty-eight lusks in Okinawajima Island, as first record from Japan. The sacred places) in Shikoku Island, Japan, and reported a Ricca- Biological Magazine, Okinawa, 56: 27–31. rdoella mite which were identified at the genus level by Shiba. Here, we identified the soil mite as Riccardoella reaumuri Fain & van Goethem, 1986 based on morphological observa- tions. This is the first study reporting R. reaumuri as free-liv- ing, since this mite was found from only mantle surfaces and lungs of host terrestrial gastropods (Fain and van Goethem 1986, Waki et al., 2018b, 2019). Material examined (Fig. 1): Collected from environments of the Konsenji temple at Itano-cho, Itano-gun, Tokushima Pre- fecture, Shikoku Island, Japan. 30-XI-2001, by Y. Nakamura and T. Fujikawa (Nakamura et al., 2006). Body (gnathosoma and idiosoma) length 454 µm. References André, H. M., Ducarme, X. and Lebrun, P. 2004. New ereynetid mites (Acari: Tydeoidea) from karstic areas: True association or sampling bias? Journal of Cave and Karst Studies, 66: 81–88. Fain, A. and Barker, G. M. 2004. A new species of the genus Ric- cardoella Berlese, 1923 (Acari: Ereynetidae) occurring as a parasite in the pallial cavity of Athoracophoridae (Gastropoda) in New Zealand. Bulletin de la Société Royale Belge d’En- Fig. 1. Riccardoella reaumuri Fain & van Goethem, 1986 used in tomologie, 140: 43–48. Nakamura et al. (2006). Bar: 100 µm. Snail mite Riccardoella reaumuri (Acari, Prostigmata, Ereynetidae) as free living from Shikoku Island, Japan. 27 Waki, T., Shimano, S. and Asami, T. 2019. Riccardoella mites in- Tsukasa Waki (Faculty of Science, Toho University), Satoshi Shi- fecting six land snail species, referred to in the Red Data List mano (Science Research Center, Hosei University), Minoru Shiba and the Red Data Book. Taxa, Proceedings of the Japanese (Matsuyama Shinonome Junior College, Professor Emeritus) Society of Systematic Zoology, 46: 1–6..