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Nigronia
Nigronia is a genus of megalopterous insects (dark fishflies) in the family of Corydalidae The family Corydalidae contains the megalopterous insects known as dobsonflies and fishflies. Making up about one dozen genera,See references in Haaramo (2008) they occur primarily throughout the Northern Hemisphere, both temperate and tropical, .... The typical size of species in the Nigronia genus are 20-30 millimeters. Species There are 2 species in the genus Nigronia; '' Nigronia serricornis'' and '' Nigronia fasciata''. The main thing that distinguishes the two species is that ''Nigronia fasciata'' has continuous and large white areas on its wings, whereas ''Nigronia serricornis'' has white spots on its wings which are isolated, rather than large and continuous. References {{Taxonbar, from=Q11846020 Corydalidae Insect genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nigronia Serricornis
''Nigronia serricornis'' has many common names including hellgrammites or fishflies or saw-combed fishflies. The genus ''Nigronia'' has one other North American member ''N. fasciatus'' and South American which lives in much of the same territory and is quite similar in all regards. They are holometabolous insects with an aquatic larval stage. ''N. serricornis'' is a common inhabitant of woodland streams in North America and they are often the largest insect predator found in 2nd and 3rd order streams. The larvae are a sit-and -wait ambush predators that feed on a large variety of invertebrates. Studies have shown that ''N. serricornis'' has a varying diet throughout the seasons. Distribution Despite this small organism's limited ability to disperse it has managed to spread throughout the Eastern United States. The range of ''N. serricornis'' expands northward from Florida into Ontario, and west to the US Rocky Mountains. By using genetic analyses, Heilveil and Berlocher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nigronia Fasciata
''Nigronia fasciata'' is a megalopterous dark fishfly in the Corydalidae family. The typical size of ''N. fasciata'' is 22 to 28 millimeters, or 2.2 to 2.8 centimeters. Range: Eastern United States. Note: not present in Canada. References Corydalidae Insects described in 1975 {{Megaloptera-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fishflies
Fishflies are members of the subfamily Chauliodinae, belonging to the megalopteran family Corydalidae. They are most easily distinguished from their closest relatives, dobsonflies, by the jaws (mandibles) and antennae. In contrast to the large jaws (especially in males) of dobsonflies, fishfly mandibles are not particularly noticeable or distinctive, and the males have feathery antennae similar to many large moths. ''Chauliodes pectinicornis'', the "summer fishfly", is a well-known species in North America. Fishflies lay their eggs upon vegetation overhanging streams, whence the larvae, as soon as hatched, drop into the water, and go about preying upon aquatic animals. When ready to transform to pupae, they crawl out upon the bank and are then found in cavities under stones or even under the bark of trees. Fishflies are quite large, with a wingspan of . They will eat aquatic plants as well as small animals including vertebrates like minnows and tadpoles, and may live up to seven ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corydalidae
The family Corydalidae contains the megalopterous insects known as dobsonflies and fishflies. Making up about one dozen genera,See references in Haaramo (2008) they occur primarily throughout the Northern Hemisphere, both temperate and tropical, and South America. They are sizeable Megaloptera, with a body usually larger than 25 mm (1 inch). They often have long filamentous antennae, though in male fishflies they are characteristically feathered. Ocelli are present; the fourth tarsal segment is cylinder-shaped. The four large wings are translucent, smoky grey, or mixed, and the anterior pair is slightly longer than the posterior one. Their aquatic larvae are used as fish bait and are called hellgrammites. 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megaloptera
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. Megaloptera are relatively unknown insects across much of their range, due to the adults' short lives, the aquatic larvae's often-high tolerance of pollution (so they are not often encountered by swimmers etc.), and the generally crepuscular or nocturnal habits. However, in the Americas the dobsonflies are rather well known, as their males have tusk-like mandibles. These, while formidable in appearance, are relatively harmless to humans and other animals; much like a peacock's feathers, they serve mainly to impress females. However, the mandibles are also used to hold females during mating, and some male dobsonflies spar with each other in courtship displays, trying to flip each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
