There are currently 74 named species of emerald moths (Geometrinae) recorded from the US and Canada. The group comprises twelve different genera across five tribes. The largest group of species belongs to the genus Nemoria with approximately 35 distinct species. While Nemoria species can be found throughout the United States and Canadian provinces, the greatest diversity occurs in the southwestern states (California, Arizona, New Mexico and Texas) and in Florida in the southeast.
While this site is devoted principally to the subfamily Geometrinae, a few other selected Geometrid species are featured here. Other subfamilies in the family Geometridae include Archiearinae, Oenochrominae, Desmobathrinae, Sterrhinae, Larentiinae, and Ennominae.
Geometrine caterpillars are among the most interesting larvae in the inchworm family - often elaborated in distinctive ways, they are also fascinating in cryptic behaviors and as examples of remarkable phenotypic plasticity.
"Although basically simple and rather generalized in some respects (e.g. genitalia), they are highly specialized in others... Geometrine larvae surely include some of the most elaborately specialized forms in the whole of the Geometridae"
Doug Ferguson in MONA 18.1
"Although basically simple and rather generalized in some respects (e.g. genitalia), they are highly specialized in others... Geometrine larvae surely include some of the most elaborately specialized forms in the whole of the Geometridae"
Doug Ferguson in MONA 18.1