(Clerck, 1757) (Water Spider)
Medium-sized spider fully adapted for an aquatic life-style. Carapace pale to dark yellowish brown. Abdomen with dense pubescense appearing velvet-grey on land. But when in water, air is trapped around the abdomen giving it a silvery appearance. Legs coloured as carapace. Legs III and IV are furnished with long fine hairs that aid in swimming. These swimhairs are easily seen with a lens when the spider is examined in a tray with water, and identifies both immatures and adults. The species is one of very few spider species where the male usually is larger than the female. They build a retreat in the form of an underwater diving-bell, which is kept filled with air collected at the surface. The species has a reputation of being able to deliver a painful bite.
Female 8-12 mm; male 10-15 mm.
Characters of genus:
is the sole member of the genus, with one subspecies,
A. aquatica japonica
, described from Japan. The latin word \"
\" translates in to \"silvery net\", and refers to the unique underwater diving-bell that the species creates.
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