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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 origin of the word "dobsonfly" is unclear. John Henry Comstock used the term in reference to these insects in his 1897 book Insect Life, [1] but did not explain it. He also mentioned that anglers used the word "hellgrammite" for the aquatic larvae they used as bait, but the origin of this term is also unknown.
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Corydalus is a transliteration from the Greek κορδαλος (korúdalos) [3] meaning a crested lark or the flower, larkspur, apparently related to Greek corys (κορυς) a helmet crest. [4]
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 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.
Neoneuromus sikkimmensis is a species of dobsonfly found in the China, India, Laos, Thailand, and Vietnam. [1]They are identifiable by the yellow head and prothorax and the pair of narrow black stripes along the margin of the head and behind the eyes.
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]