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 is a transliteration from the Greek κορδαλος (korúdalos) 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 - Venezuela
• Corydalus texanus Banks, 1903 - Southwest United States, Guatemala, Mexico
• Corydalus tridentatus Stitz 1914 - Brazil