Riscus

Gnathosoma. Pedipalps 5-segmented, extend beyond the subcapitulum by at least the last segment, and end in a strong claw; apophysis absent. Basifemora and telofemora complemented with simple setae; these two segments fused, although a line remains visible and they can thus be differentiated. Subcapitulum complemented with 6 pairs of setae (hg1–4 and 2 pairs of adoral setae). Setae hg3 and hg4 both near the coxal bases of the pedipalps. Idiosoma, dorsal. Female dorsal idiosoma has a sclerotized plate that bears 2 pairs of setose sensillae (at and pt) and 2 pairs of simple setae (lps and mps). Idiosomal shield covered by integumental papillae that form a reticulated pattern. Hysterosoma lacks a plate and bears 7 pairs of setae (c1–2, d1–h1). Cupule im present, usually laterad or in the proximity of e1. Idiosoma, ventral. Coxae ill-defined. Coxae I and II fused; coxae III and IV fused. Coxae I–IV setal formula 3-1-3-1 (including paracoxal seta). Genital plates each bear 4 setae. Anal plates bear 1 pair of setae (ps1). 2 pairs of setae (ps2 and h2) associated with, but do not occur on, the anal plates. Cupule ih present in close proximity to h2. Integument between plates striated and bears 5 pairs of additional setae. Legs. Ambulacral claws on either side of a 4-rayed empodium present.