Halacaroides Bartsch, 1981

Bartsch, Ilse, 2015, The genital area of Halacaridae (Acari), life stages and development of morphological characters and implication on the classification, Zootaxa 3919 (2), pp. 201-259 : 218

Halacaroides Bartsch, 1981

Type species. Halacaroides angustus Bartsch, 1981 .

Adults. In female and male GP and AP fused. Female GA with one to three pairs of slender pgs ( Bartsch 1981b: figs 13, 24, 2008c: fig. 4B) and zero to two pairs of sgs; three pairs of internal gac arranged in line and adjacent in middle of GO ( Bartsch 2008c: fig. 4F; Pepato et al. 2011: fig. 6C). Ovipositor at rest extending distinctly beyond GO; when everted five pairs of slender, smooth genital spines visible ( Bartsch 2008c: fig. 4F). Male GA with 10–22 pairs of slender pgs, genital sclerites with three to five pairs of sgs. Male with three pairs of gac in posterior part of GO. Acetabula either adjacent within internal fovea which opens to the exterior ( Bartsch 2008c: fig. 4G), or one pair internal but two pairs external, directly opening on genital sclerites ( Pepato et al. 2011: fig. 6B). No epimeral pores on AE.

Juveniles. Deutonymphal GP with two pairs of internal gac and single pair of pgs (as in female of that species) ( Bartsch 2008c: fig. 5I); sgs lacking.

Remarks. The present records of the genus are from the southern hemisphere ( Bartsch 2008c; Pepato et al. 2011). The four species known are psammobionts. One of the species with the males having their genital acetabula aggregated within a fovea has been collected in a tidal sandy slope which was strongly influenced by freshwater ( Bartsch 2008c).