Tags: Crustacean.
Eryonidae is a family of fossil decapod crustaceans which lived from the Upper Triassic to the Lower Cretaceous. It contains four genera: An aggregation of three unidentified eryonids was reported in 2012 inside a Late Jurassic ammonoid of the species Harpoceras falciferum; they represent the earliest evidence of gregarious behaviour in decapods.Cycleryon Glaessner 1965Eryon A. G. Desmarest 1817Knebelia Van Straelen 1922Rosenfeldia Garassino Teruzzi & Dalla Vecchia 1996↑ ↑ ↑
