Grigs
Guides
Prophalangopsidae
grigs, primitive katydids
Prophalangopsidae is the sole extant family of the ancient superfamily Hagloidea (Orthoptera). The family comprises a small number of relict species in North America and Asia, alongside numerous extinct genera known from Jurassic and Cretaceous deposits. Extant members are known as "grigs" in North America. The family diverged from its closest living relatives, the katydids (Tettigoniidae), over 230 million years ago during the Permian, making it one of the most phylogenetically isolated orthopteran lineages. Fossil evidence documents substantial diversity during the Middle Jurassic to Early Cretaceous, with sparse records thereafter.