Genus Zygoseius Berlese, 1916 (Family?)

Zygoseius Berlese, 1916a: 41. Type species Lasioseius (Zygoseius) furciger Berlese, 1916, by original designation.

Notes. The genus Zygoseius was revised by Halliday (1997) and Karg (1998), and is now well documented. It has been provisionally placed in the families Ascidae (Evans, 1958; Sheals 1962; Hyatt 1964), Pachylaelapidae (Lindquist & Evans 1965; Krantz & Ainscough, 1990; Halliday, 1997; Lindquist et al., 2009) and Halolaelapidae (Karg, 1988), but none of these proposals is convincing. The presence of a strongly sclerotised sternal shield fused with the endopodal platelets is not consistent with the Halolaelapidae as defined by Halliday (2008) and Lindquist et al. (2009). It is excluded from the Pachylaelapidae as defined here on the basis of its leg chaetotaxy and the presence of two dorsal shields in the deutonymph. At the moment we are unable to place Zygoseius in any known family.