Type species. Spinacarus guniujiangensis sp. nov.

Diagnosis. Body fusiform, flat; prodorsal shield with broad frontal lobe, scapular tubercles and setae (sc) absent; female genitalia not appressed to coxal plate, all coxal setae present; legs with usual series of setae, tibia with a short spine at the margin on both legs; dorsal opisthosoma with the 1 st, 3 rd, 4 th, 5 th, 7 th, 8 th, 10 th, 11 th, 13 th and 16 th annulus with large spines at each side laterally, with a shallow furrow, smooth, opisthosoma with all usual setae; empodium entire; setae h1 absent; female genital coverflap with two rows of ridges.

Etymology. The genus designation is derived from the combination of spina, Latin, means spine (some dorsal opisthosomal annuli with spines laterally) and acarus, masculine in gender.

Notes. The new genus is assigned to Eriophyoidea, Eriophyidae, Phyllocoptinae, Calacarini. The new genus is similar to Phaulacus Keifer, 1961b, but can be differentiated from the latter by genual seta on leg II present (genual seta on leg II absent in Phaulacus).