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Stenacron
''Stenacron'' is a genus in the family Heptageniidae, the flat-headed mayflies. Almost all species are distributed across eastern North America. Life History Although larvae can be found in many different conditions, they have some basic and preferred requirements. They tend to cling to the underside of rocks that are a minimum of 8 X 8 inches and 2 inches thick. Larger rocks contain greater populations of Stenacron species. They are seldom found in the faster riffle waters but instead at the slower moving banks, typically with a water depth of no less than 3 inches and up to 16 inches deep. Stenacron can live in waters that are not moving and low in DO, however, they prefer a stable and moderate DO in which greater populations will occur. Lewis showed that the form (Stenacron interpunctatum / heterotarsale) historically carried an EBI (Empirical Biotic Index) rating of a level (7) showing a high tolerance level to pollution's both Toxic and Organic. Taxonomy History Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenacron Interpunctatum - Male
''Stenacron'' is a genus in the family Heptageniidae, the flat-headed mayflies. Almost all species are distributed across eastern North America. Life History Although larvae can be found in many different conditions, they have some basic and preferred requirements. They tend to cling to the underside of rocks that are a minimum of 8 X 8 inches and 2 inches thick. Larger rocks contain greater populations of Stenacron species. They are seldom found in the faster riffle waters but instead at the slower moving banks, typically with a water depth of no less than 3 inches and up to 16 inches deep. Stenacron can live in waters that are not moving and low in DO, however, they prefer a stable and moderate DO in which greater populations will occur. Lewis showed that the form (Stenacron interpunctatum / heterotarsale) historically carried an EBI (Empirical Biotic Index) rating of a level (7) showing a high tolerance level to pollution's both Toxic and Organic. Taxonomy History T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenacron Interpunctatum
''Stenacron interpunctatum'', the stenacron mayfly, is a species of flatheaded mayfly in the family Heptageniidae The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern Sou .... It is found in North America. References External links * Mayflies Articles created by Qbugbot Insects described in 1839 {{mayfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenacron Carolina
''Stenacron carolina'' is a species of flatheaded mayfly in the family Heptageniidae The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern Sou .... It is found in North America. References Mayflies Articles created by Qbugbot Insects described in 1914 {{mayfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenacron Pallidum
''Stenacron pallidum'' is a species of flatheaded mayfly in the family Heptageniidae The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern Sou .... It is found in the eastern United States. References Mayflies Articles created by Qbugbot Insects described in 1933 {{mayfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenacron Candidum
''Stenacron candidum'' is a species of flatheaded mayfly in the family Heptageniidae The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern Sou .... It is found in North America. References Mayflies Articles created by Qbugbot Insects described in 1935 {{mayfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenacron Floridense
''Stenacron floridense'' is a species of flatheaded mayfly in the family Heptageniidae The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern Sou .... It is found in North America. References Mayflies Articles created by Qbugbot Insects described in 1974 {{mayfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenacron Gildersleevei
''Stenacron gildersleevei'', or Gildersleeve's stenacron mayfly, is a species of flatheaded mayfly in the family Heptageniidae The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern Sou .... It is found in North America. References Mayflies Articles created by Qbugbot Insects described in 1935 {{mayfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenacron Minnetonka
''Stenacron minnetonka'' is a species of flatheaded mayfly in the family Heptageniidae The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern Sou .... It is found in North America. References Mayflies Articles created by Qbugbot Insects described in 1945 {{mayfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heptageniidae
The Heptageniidae (synonym: Ecdyonuridae) are a family of mayflies with over 500 described species mainly distributed in the Holarctic, Oriental, and Afrotropical regions, and also present in the Central American Tropics and extreme northern South America. The group is sometimes referred to as flat-headed mayflies or stream mayflies. These are generally rather small mayflies with three long tails. The wings are usually clear with prominent venation although species with variegated wings are known. As in most mayflies, the males have large compound eyes, but not divided into upper and lower parts. Heptageniids breed mainly in fast-flowing streams, but some species use still waters. The nymphs have a flattened shape and are usually dark in colour. They use a wide range of food sources with herbivorous, scavenging, and predatory species known. The oldest described member of the family is '' Amerogenia'' from the Late Cretaceous (Turonian) aged New Jersey amber New Jersey Amber, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Say
Thomas Say (June 27, 1787 – October 10, 1834) was an American entomologist, conchologist, and Herpetology, herpetologist. His studies of insects and shells, numerous contributions to scientific journals, and scientific expeditions to Florida, Georgia, the Rocky Mountains, Mexico, and elsewhere made him an internationally known naturalist. Say has been called the father of American descriptive entomology and American conchology. He served as librarian for the Academy of Natural Sciences of Philadelphia, curator at the American Philosophical Society (elected in 1817), and professor of natural history at the University of Pennsylvania. Early life and education Born in Philadelphia into a prominent Religious Society of Friends, Quaker family, Thomas Say was the great-grandson of John Bartram, and the great-nephew of William Bartram. His father, Dr. Benjamin Say, was brother-in-law to another Bartram son, Moses Bartram. The Say family had a house, "The Cliffs" at Gray's Ferry Bridge, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mayfly Genera
Mayflies (also known as shadflies or fishflies in Canada and the upper Midwestern United States, as Canadian soldiers in the American Great Lakes region, and as up-winged flies in the United Kingdom) are aquatic insects belonging to the order Ephemeroptera. This order is part of an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies. Over 3,000 species of mayfly are known worldwide, grouped into over 400 genera in 42 families. Mayflies have ancestral traits that were probably present in the first flying insects, such as long tails and wings that do not fold flat over the abdomen. Their immature stages are aquatic fresh water forms (called "naiads" or "nymphs"), whose presence indicates a clean, unpolluted and highly oxygenated aquatic environment. They are unique among insect orders in having a fully winged terrestrial preadult stage, the subimago, which moults into a sexually mature adult, the imago. Mayflies "hatch" (emerge as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
