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The metamorphosis from larva to adult in dobsonflies is one of the simplest of the holometabolous orders, [3] yet the life cycle begins with an intriguing ritualized courtship display (most of the following comes from Simonsen et al. 2008 [8] and all pertains to Corydalus; other courtship rituals remain unknown). Males compete with each other ...
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. They are endemic to North, Central and South America and there are about 35 known species.
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]
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.
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.
Larvae inhabit streams or rivers with low contamination. Larvae are sensitive to pH changes, with instances of A. fruhstorferi populations being reduced due to developments in urbanized locations such as Panzhihua, Sichuan. Typical of other dobsonflies, A. fruhstorferi larvae prey on aquatic insects, juvenile amphibians and small fish.
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Larvae are typical hellgrammites, and fill a similar ecological niche to larvae of Corydalus and other genera. There appears to be an altitudinal gradient between Platyneuromus and Corydalus in Mexico. At low elevations (about 500 m), under a semiarid climate, only C. luteus Hagen is found.