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Ephemerella Excrucians
''Ephemerella excrucians'', the pale morning dun, is a species of spiny crawler mayfly in the family Ephemerellidae Ephemerellidae are known as the spiny crawler mayflies. They are a family of the order Ephemeroptera. There are eight genera consisting of a total 90 species (Merritt & Cummins). They are distributed throughout North America as well as the UK. T .... It is found in all of Canada and the continental United States. References * Jacobus, L. M., and W. P. McCafferty (2003). "Revisionary contributions to North American Ephemerella and Serratella (Ephemeroptera: Ephemerellidae)". ''Journal of the New York Entomological Society'', vol. 111, no. 4, 174-193. * Walsh, Benjamin D. (1862). "List of the Pseudoneuroptera of Illinois contained in the Cabinet of the writer, with descriptions of over forty new species, and notes on their structural affinities". ''Proceedings of the Academy of Natural Sciences of Philadelphia'', vol. 14, no. 7-9, 361-402. Further reading * Arn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ephemerellidae
Ephemerellidae are known as the spiny crawler mayflies. They are a family of the order Ephemeroptera. There are eight genera consisting of a total 90 species (Merritt & Cummins). They are distributed throughout North America as well as the UK. Their habitat is lotic-erosional, they are found in all sizes of flowing streams on different types of substrates where there is reduced flow. They are even found on the shores of lakes and beaches where there is wave action present. They move by swimming and clinging, they are very well camouflaged. Most species have one generation per year. They are mostly collector-gatherers. If threatened by a predator, the larva will raise its three tails in a "scorpion posture" to appear larger. It will then project its tails in front and poke the enemy. Most species are sensitive to disturbance. In the UK, the most commonly recorded species is ''Seratella ignita''. The nymph of this animal is often distinguished from other Mayflies by the darker ban ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |