Xenohalacarus Otto, 2000
Type species. Xenohalacarus longirostris Otto, 2000 .
Adults. Genital and anal plate fused. In both female and male GO rather small and in ventral position. Female GA with four to five pairs of pgs; sgs lacking (Otto 2000e: fig. 4). Genital sclerites of male with five pairs of setiform sgs, GA with 28 pairs of pgs and at least two pairs of internal gac (Otto 2000e: figs 2, 7). AE with epimeral pores.
Juveniles. Only deutonymphal stage known. Its genital plate separated from anal plate. GP with two pairs of internal gac, two pairs of pgs but no sgs (Otto 2000e: fig. 13). Protonymph and larva not seen. Remarks. A single record from sublittoral sandy deposits off eastern Australia (Otto 2000e).