1) Arthropod genus 2) Genus notonecta 
Notonecta, or the common backswimmer, is a genus of backswimmer insects in the family Notonectidae. Species in this genus include: ...
(from the article `back swimmer`) The genus Notonecta, distributed worldwide, may be quite destructive to fishes and tadpoles. It will bite humans when handled, the bite feeling ...
[n] - type genus of the Notonectidae: backswimmers
genus Notonecta noun type genus of the Notonectidae: backswimmers