Aphelocheiroidea Corixoidea Naucoroidea Nepoidea Notonectoidea Ochteroidea Pleoidea Cryptocerata Hydrocorisae Nepomorpha is an infraorder of insects in the "true bug" order (Hemiptera).

As evidenced by fossils such as the rather advanced Triassocoridae or the primitive water boatman Lufengnacta, the radiation establishing today's superfamilies seems to have been largely complete by the end of the Triassic 201 million years ago.

[1] Though the systematics and phylogeny of the higher taxa of Nepomorpha were long controversial, cladistic analysis of mitochondrial 16S and nuclear 28S rDNA sequence data and morphology has more recently resolved to near-perfection.

The Cibariopectinata, a proposed clade established on the presence of cibariopectine structures in the food-sucking pump of some of the most advanced true water bugs (Tripartita), might indeed be monophyletic.

[1] About seven superfamilies, in evolutionary sequence, from the most ancient to the most modern lineage,[1] have been identified in the Infraorder Nepomorpha: Note: sometimes included in Notonectoidea