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Mayfly - Wikipedia ... Mayfly
Dolania is a monotypic genus of mayfly in the family Behningiidae containing the single species Dolania americana, also known as the American sand-burrowing mayfly. [ 2] It is found in the southeastern United States, as far south as Florida, and is generally uncommon. [ 3] The adult insects emerge before dawn in early summer, mate and die ...
Insect reproductive system. Most insects reproduce oviparously, i.e. by laying eggs. The eggs are produced by the female in a pair of ovaries. Sperm, produced by the male in one testicle or more commonly two, is transmitted to the female during mating by means of external genitalia. The sperm is stored within the female in one or more spermathecae.
A species is considered semelparous if it is characterized by a single reproductive episode before death, and iteroparous if it is characterized by multiple reproductive cycles over the course of its lifetime. Iteroparity can be further divided into continuous iteroparity (primates, including humans and chimpanzees) and seasonal iteroparity ...
Evolution of insects
Ephemera guttulata, commonly known as the eastern green drake, shad fly and coffinfly, is a species of mayfly in the genus Ephemera. The eastern green drake is native to the continental United States and Canada. Its conservation status per the NatureServe conservation status ranking system is G5, meaning it is secure. [2]
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. [1] The group is sometimes referred to as flat-headed mayflies or stream mayflies.
Palingeniidae is a family of mayflies, members of which are known as spiny-headed burrowing mayflies. These are generally quite large mayflies with more than four longitudinal cross-veins on their wings. Males have short, wide pronotums and the legs are well-developed in both sexes. The cerci (tails) on females are shorter than the body.