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265, 266) variable shades of tan, with light scopulae on incrassate tarsi I-II; tibia I spinose, without prolateral clasping spurs.
Hind femur strongly incrassate; dorsal side of hind femur granulate and with 1 large, sharp spine with 5-7 gradually smaller, blunt denticles following (Fig.
Apertural lip wide and flaring, but hardly incrassate. Two apertural barriers visible in frontal view: a weak, blunt thickening on mid-palatal wall and a projecting angular tooth that extends inwards as deeply entering lamella.
Apertural lip expanded and flaring, slightly reflected, not strongly incrassate. Two barriers visible in aperture: a weak (or almost wanting) thickening on mid-palatal wall and not (or barely) projecting angular tooth that extends inwards as deeply entering lamella.
Chela manus ([male]) incrassate, length along ventroexternal carina 33-51% greater than manus width, 32-37% greater than manus height (Table 1), fingers strongly curved proximally (fixed finger curved dorsally, movable finger curved ventrally), such that only connect distally and distinctive gap present between them proximally, when closed (Fig.
Embolus and tegulum incrassate, distal portion of embolus sub-perpendicular to the basal axis, tegulum without tegular apophysis and granulation.
median carina on the pronotum, the length of first segment of middle tarsus being more than 2.5 (but less than 4) times that of the second segment; the mesosternum less than twice length of metasternum, and the short, conate parameres, whereas the sister group relationship between Gerris and Aquarius is diagnosed by the basis of the first antennal segment being shorter than half the body length; the absence of a pale median stripe on the pronotal lobe, the thickened fore femora of the female, and the incrassate fore femora of the male (Damgaard and Cognato, 2005).
Pedipalpal tibia, size in relation to the femur, (0) incrassate, comparable size; (1) not incrassate, much smaller.
Transverse, narrower than pronotum, eyes moderate in size, about as long as tempora; infraorbital carina well developed, complete; neck absent; antennomere 4 subquadrate, 5-10 transverse, slightly incrassate toward.
This species has an exaggerated first antennal segment, being greatly incrassate and elongate, with unique, brushlike setae.
The curvature of metatarsus I, the incrassate tibia I, and the presence of an apophysis on the ventral metatarsus I are characteristics found in Sickius longibulbi, as well as Porrhothele antipodiana (Hexathelidae) (Jackson & Pollard 1990) and Fufius spp.
Antenna about 2/3 as long as total body length; segment II cylindrical, not incrassate, a little longer than head width across eyes; segment IV longer than III.