What is "gerromorpha"

The Gerromorpha comprise an infraorder of insects in the "true bug" order Hemiptera. These "typical" bugs ( suborder Heteroptera) are commonly called semiaquatic bugs or shore-inhabiting bugs. The Ochteroidea of the true water strider (infraorder Nepomorpha, a far more advanced lineage) are also found in shore habitat, while the Gerromorpha are actually most often encountered running around on the water surface, being kept from sinking by surface tension and their water-repellent legs. Well-known members of the Gerromorpha are the namesake Gerridae (water striders).