Corydalus is a genus of large flying insects in the Corydalidae family, commonly known as dobsonflies. They are endemic to North, Central and South America and there are about 35 known species. Members of the genus have wing lengths of up to 85 millimetres. They are sexually dimorphic, with the males having large mandibles used to grasp the females during mating while the females have smaller jaws. The larvae are known as hellgrammites and are aquatic predators. Etymology Corydalus (also transcribed corydalis) comes from the Greek (κορυδαλλις) meaning a crested lark or the flower, larkspur, apparently related to Greek corys (κορυς) a helmet crest. The name probably refers to the long mandibles of the male which might be considered to resemble the crest of a lark, or perhaps, the decorative crests of a helmet. Species Corydalus affinis Burmeister, 1839 - Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Venezuela Corydalus amazonas Contreras-Ramos, 1998 - Brazil Corydalus armatus Hagen, 1861 - Argentina, Bolivia, Brazil(?), Colombia, Ecuador, Peru, Venezuela Corydalus arpi Navás, 1936 - Venezuela Corydalus australis Contreras-Ramos, 1998 - Argentina, Brazil, Uruguay Corydalus batesii McLachlan, 1867 - Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela Corydalus bidenticulatus Contreras-Ramos, 1998 - Mexico, Arizona Corydalus cephalotes Rambur, 1842 - Brazil Corydalus clauseni Contreras-Ramos, 1998 - Colombia, Costa Rica, Ecuador Corydalus clavijoi Contreras-Ramos, 2002 Corydalus colombianus Contreras-Ramos, 1998 - Colombia Corydalus cornutus (Linnaeus, 1758) - Eastern dobsonfly - Eastern North America Corydalus crossi Contreras-Ramos, 2002 Corydalus diasi Navás, 1915 - Argentina, Brazil, Paraguay Corydalus ecuadorianus Banks, 1948 - Ecuador Corydalus flavicornis Stitz, 1914 - Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Panama, Peru, Venezuela Corydalus flinti Contreras-Ramos, 1998 - Venezuela Corydalus hayashii Contreras-Ramos, 2002 Corydalus hecate McLachlan, 1866 - Brazil, Peru, Venezuela Corydalus holzenthali Contreras-Ramos, 1998 - Bolivia, Peru Corydalus ignotus Contreras-Ramos, 1998 - French Guiana Corydalus imperiosus Contreras-Ramos, 1998 - Argentina Corydalus longicornis Contreras-Ramos, 1998 - Argentina, Bolivia, Ecuador Corydalus luteus Hagen, 1861 - Southern United States, Mexico, Central America Corydalus magnus Contreras-Ramos, 1998 - Central America Corydalus mayri Contreras-Ramos, 2002 Corydalus neblinensis Contreras-Ramos, 1998 - Venezuela Corydalus nubilus Erichson, 1848 - Brazil, French Guiana, Guyana, Venezuela Corydalus parvus Stitz, 1914 - Ecuador, Peru Corydalus peruvianus K. Davis, 1903 - Argentina, Bolivia, Colombia, Costa Rica, Ecuador, Guatemala, Mexico, Panama, Peru, Venezuela Corydalus primitivus Van der Weele, 1909 - Argentina, Bolivia Corydalus territans Needham, 1909 Corydalus tesselatus Stitz, 1914