Telchin atymnius

Castniomera is a monotypic genus of moths in the family Castniidae described by Constant Vincent Houlbert in 1918. Its single species, Castniomera atymnius, commonly known as the giant butterfly-moth, was first described by Johan Wilhelm Dalman in 1824. It is known from Mexico through Central America to Venezuela.

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Castniomera es un género de lepidópteros de la familia Castniidae. Fue descrito por Houlbert en 1918, consta de una sola especie: Castniomera atymnius. ​ Es originaria de Venezuela.