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Eastern Dobsonfly (Corydalus cornutus) female. The adult dobsonfly is a large insect up to 140 millimetres long with a wingspan of up to 125 millimetres. [8] The female has short powerful mandibles of a similar size to those of the larva while the mandibles of the male are sickle-shaped and up to 40 millimetres long, half as long as the body. [1]
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.
The eastern dobsonfly, Corydalus cornutus, is the most well-known North American species among the dobsonflies. These genera have distinctive elongated mandibles in males and form the subfamily Corydalinae. The genera in which the males have normal mandibles, called fishflies, form the subfamily Chauliodinae.
The Asian Acanthacorydalis fruhstorferi can have a wingspan of up to 21.6 cm (8.5 in), making it the largest dobsonfly and the largest aquatic insect in the world by this measurement. [ 4 ] [ 5 ] The wings vary from a grayish to translucent shade, depending on the species, and the anal region of the hindwing is wide and folded at rest.
Corydalus cornutus - MHNT. Megaloptera is an order of insects.It contains the alderflies, dobsonflies and fishflies, and there are about 300 known species.. The order's name comes from Ancient Greek, from mega-(μέγα-) "large" + pteryx (πτέρυξ) "wing", in reference to the large, clumsy wings of these insects.
The largest is the dobsonfly Acanthacorydalis fruhstorferi, which can have a wingspan of up to 21.6 cm (8.5 in), making it the largest aquatic insect in the world by this measurement. [38] This species is native to China and Vietnam, and its body can be up to 10.5 cm (4.1 in) long. [39]
Prey of this species includes [6] the tiger mosquito, giant willow aphid, fungus gnats, crane flies, large diving beetles, eastern dobsonfly, water fleas, green darner, aquatic oligochaetes, caddisflies, rotifers, copepods, amphipods, dogwood borer, six-spotted tiger beetle, freshwater triclads, and green hydra.
Corydalus affinis is a species of dobsonfly in the genus Corydalus. It is found in Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, and Venezuela. It is found mainly in Amazonian lowlands. Forewing length ranges from 32-58 millimeters, with the females slightly larger than the males. [1] [2] [3]