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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]
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 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]
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.
A wild collected female kept at the Insect Museum of West China in Chengdu was the record holder with a total length, including extended legs, of 62.4 cm (24.6 in), and a body length of 36.1 cm (14.2 in), [16] [17] but it was surpassed by one of its captive bred young that reached 64 cm (25 in) in total length. [18] [19]
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Chloronia is one of the three New World dobsonfly genera, the other two being Platyneuromus and Corydalus. Chloronia are easily distinguished by their bright yellow coloration with black spots and are present from Northern Mexico south to Eastern South America. [2] Chloronia frequently inhabit the same streams as Corydalus but prefer slower ...
Protohermes grandis is a species of dobsonfly occurring in China, Japan, Korea, and Taiwan, as well as South and North America, South Africa, Madagascar, Australia, and New Zealand. [1] They are closely related to P. immaculatus. [2] They are the smallest species of Protohermes fly. [2]