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Denina
''Denina'' is a monotypic genus of European mayflies in the family Ephemeridae Ephemeridae is a family of mayfly, mayflies with about 150 described species found throughout the world except Australia and Oceania. Description Ephemerids are generally quite large mayflies (up to 35 mm) with either two or three very long ..., erected by McCafferty in 1987,McCafferty (1987) ''Ann Entomol Soc Am'' 80 (4). containing the species ''Denina dubiloca'' . References External links * Mayfly genera Mayflies Monotypic insect genera {{Mayfly-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ephemeridae
Ephemeridae is a family of mayfly, mayflies with about 150 described species found throughout the world except Australia and Oceania. Description Ephemerids are generally quite large mayflies (up to 35 mm) with either two or three very long tails. Many species have distinctively patterned wings.Chinery, Michael (1986) ''Collins Guide to the Insects of Britain and Western Europe'' (Reprinted 1991) They breed in a wide range of waters, usually requiring a layer of silt as the nymph (zoology), nymphs have strong legs which are adapted for burrowing (the group is sometimes known as burrowing mayflies). The nymphs are largely carnivore, carnivorous and collect their food either through predation or scavenger, scavenging. Genera The Global Biodiversity Information FacilityGlobal Biodiversity Information Facility: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Genus
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical system. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mayflies
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 (biology), 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 family (biology), families. Mayflies have ancestral traits that were probably present in the first flying insects, such as long tails and Insect wing, wings that do not fold flat over the insect morphology#Abdomen, abdomen. Their immature stages are aquatic fresh water forms (called "naiads" or "nymph (biology), 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 sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
