The second Caloneurodea from the Moscovian of Avion, France (Insecta, Archaeorthoptera)

The Late Palaeozoic insect order Caloneurodea Handlirsch, 1907 is a rather small clade in the superorder Archaeorthoptera Béthoux & Nel, 2002 (Béthoux et al., 2003), several representatives have been recently described from Portugal, France, China, and Russia (see Dvořák et al., 2021 and references herein). The body structures of these insects are poorly known and the majority of genera and species are based on isolated wings. Also the majority of genera and species are Permian and latest Carboniferous. With two genera and species recorded from the Moscovian of the Pas-de-Calais Basin, this area is of great interest to estimate the diversity of this order during the early Pennsylvanian (Pruvost, 1919; Prokop et al., 2014). Here we describe the second genus and species from the Avion locality, which has already given Aviogramma gracilis Prokop et al., 2014. This discovery further confirms the very important richness and diversity of the fossil entomofauna of the slag heap of Avion (Nel et al., 2013).