Checklist of oribatid mites (Acari: Oribatida) of Canada and Alaska Author Behan-Pelletier, Valerie M. Author Lindo, Zoë text Zootaxa 2019 2019-09-06 4666 1 1 180 journal article 10.11646/zootaxa.4666.1.1 1175-5326 4000595 BA01E30E-7F64-49AB-910A-7EE6E597A4A4 Phthiracarus piger ( Scopoli, 1763 ) Original name : Acarus piger Scopoli, 1763 ( Willmann 1931 ) Synonymy : Phthiracarus contractilis Perty, 1841 : ( Ghilarov 1975 ). Geographic Location : AK : Fort Richardson; Anchorage ( Hammer 1955a ). Habitats : Grass with roots. Distribution : Holarctic. Remarks : According to Marshall et al. (1987) Jacot (1930) considered Acarus piger Scopoli, 1763 to be unrecognizable and certainly not a Phthiracarus ; he assigned it to what is now considered the Euphthiracaroidea .