Hygrobates Koch, 1837

Martin, Peter, 2006, On the morphology and classification of larval water mites (Hydrachnidia, Acari) from springs in Luxembourg, Zootaxa 1138, pp. 1-44 : 26

Genus Hygrobates Koch, 1837

Diagnosis: Character states of the family, such that dorsal plate large, in unengorged specimens covering almost the entire idiosoma in length and bearing 4 pairs of setae; anterior eye lenses borne on small eye plates, posterior eye lenses in membranous integument; coxal plates on each side fused with each other and bearing 4 pairs of coxal setae; excretory pore plate very large; E1 and E2 either absent and represented by setal pores only, or setae minute; V1 present at posterior end of coxal plates III or on the excretory pore plate; V2 on excretory pore plate; V4 very long, whip­like and borne on large elongated projections; bases of chelicerae fused with each other; chela dentate; palpal segment 4 and 5 very short, P5 thumb­like, palpal claw simple; legs five­segmented and each with three claws. Leg chetotaxy ( Wainstein 1980): I­L1 1se, I­L2 7se, I­L3 4se+1so+1eu, I­L4 9se+2so+1eu, I­L 5 9–12 se+1so+1–2eu; II­L1 1se, II­L2 7se, II­L3 4se+1so+0–1eu, II­L 4 9–11 se+2so+0–1eu, II­L 5 9–12 se+1so+1–2eu; III­L1 1se, III­L2 6se, III­L3 4se+0–1so, III­L 4 9–12 se+1so, III­L 5 8–10 se+0so+1–2eu.

Remarks: The genus Hygrobates is characterized by setae V1 located on posterior end of coxal plates I–III; on the gnathosomal base, setae Hy2 longer than Hy1; P1 not fused with P2; chela with two teeth.