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Aquarius najas

Aquarius najas, also known as the river skater,[1] is a species of aquatic bug.[2] It was formerly known as Gerris najas, but the subgenus Aquarius was elevated to generic rank in 1990 on the basis of phylogenetic analysis.[3][4]


This species usually lives in the stony margins of rivers.[5]


Aquarius najas spends the winter as adults. In the spring, they form pairs, and before mating, row about together on the surface during the daytime. At night, they separate, and the females lay their eggs beneath the water in closely packed patches. Normally the eggs are laid on the surface of flat stones.[5]


  1. ^ "Aquarius najas (River skater) (Gerris najas)". Retrieved 2011-08-29. 
  2. ^ Aquarius najas at the Encyclopedia of Life
  3. ^ Andersen, Nils Møller (1990). "Phylogeny and taxonomy of water striders, genus Aquarius Schellenberg (Insecta, Hemiptera, Gerridae), with a new species from Australia". Steenstrupia 16 (4): 37–81.  Abstract
  4. ^ Gallant, Sharon L. and Fairbairn, Daphne J. (1996). "A New Species of Aquarius from the Southeastern United States, with Electrophoretic Analysis of the Clade Containing Gerris, Limnoporus, and Aquarius (Hemiptera: Gerridae)". Annals of the Entomological Society of America 89 (5): 637–644.  Abstract
  5. ^ a b Brinkhurst, R. O. (1966) "Population dynamics of the large pond-skater Gerris najas Degeer (Hemiptera-Heteroptera)." The Journal of Animal Ecology Vol. 35, No. 1 : 13-25. Abstract

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