Aphidomorpha (Aphid) is an infraorder of plant lice. There are 5242 species of Aphid, in 542 genera and 3 families. This infraorder has been around since the artinskian age. They are diurnal.
Definition: The number of fossil occurrences in the Paleobiology Database (https://paleobiodb.org) that are identified as belonging to a particular taxon or any of its subtaxa.