Neuroptera, Hemerobiiformia, Ithonioidea, Ithonidae, †Allorapisma, A. chuorum

The holotype specimen, and one of only two known specimens, of the newly described genus and species Allorapisma chuorum from the fossil sites in Republic, Ferry County Washington. This species is 49.5 +/-.05 million years old placing it in the late Ypresian, of the Eocene. This specimen is an incomplete forwing, possibly left, and thus gender is not identifiable

The area it this time was dominated by flora and fauna which are the early precursors of the Eastern US and Eastern Asian hardwood forests, while possessing elements of the current conifer forests still present in the region. The environment which this specimen lived in was upland subtropical/temperate forests surrounding a lake/string of lakes which were the southernmost in a string of lakes which extended 1000km into Central British Columbia.

The family Ithonidae is now found in the Southwest US through Panama (genus Oliarces) and southeast Asia through Tasmania (6 genera) totaling 35 species.

The family is known from only three fossil sites world wide constituting two extinct genera and three species. The monospecific Genus Allorapisma chuorum (Eocene) from Washington state, Principiala incerta (Cretaceous) from Brazil and Principiala rudgwickensis (Cretaceous) from England.