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Baetidae is a family of mayflies with about 1000 described species in 110 genera distributed worldwide. [1] These are among the smallest of mayflies, adults rarely exceeding 10 mm in length excluding the two long slender tails and sometimes much smaller, and members of the family are often referred to as small mayflies or small minnow mayflies.
Fossil adult Mickoleitia longimanus (Coxoplectoptera: Mickoleitiidae) from the Lower Cretaceous Crato Formation of Brazil, c. 108 mya. Ephemeroptera was defined by Alpheus Hyatt and Jennie Maria Arms Sheldon in 1890–1. [44] [45] The taxonomy of the Ephemeroptera was reworked by George F. Edmunds and Jay R Traver, starting in 1954.
Baetiscidae is a family of mayflies. It contains a single extant genus, Baetisca, native to North America with around 12 species. [1] [2] [3] [4] The family is noted ...
They have reduced mouthparts because the adults just emerge to mate and then die shortly after. They have two front wings and two reduced hind wings. Their wings are membranous and heavily veined to add strength since the adults must find one another through flight. The eyes of adult Ephemerellids are large and sit above two setaceous antennae.
Nymph. The mature adult stage of Hexagenia limbata can be as much as 27 cm (10.6 in) long. The females tend to be slightly larger than the males but have smaller eyes. The forewings are long and membranous while the hind wings are much smaller and have dark margins.
Ephemeroptera: Family: Ephemeridae: Genus: Ephemera Linnaeus, 1758: Ephemera simulans male. Ephemera is a genus of mayfly in the family Ephemeridae. It contains the ...
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