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23202B

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Image #   23202B
Name:   Mayfly aquatic larva nymph (Baetis sp.)
Copyright:   Copyright 2003 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Mayfly aquatic larva nymph (Baetis sp.). Mayflies are insects which belong to the Order Ephemeroptera. They have been placed into an ancient group of insects termed the Paleoptera, which also contains the dragonflies and damselflies. They are aquatic insects whose immature stage (called naiad or nymph) usually lasts for a few months to as long as several years in fresh water. The naiad lives primarily in streams under rocks, decaying vegetation, or in the sediment. Most species feed on algae or diatoms, but there are a few predatory species. Mayfly naiads are distinctive in that most have seven pairs of gills on the dorsum of the abdomen. In addition, most possess three long cerci or tails at the end of their bodies. The adults are short-lived, from a few hours to a few days depending on the species. About 2,500 species are known worldwide, including about 630 species in North America. Common names for mayflies include ""dayfly"", ""shadfly"", ""Green Bay Flies"", ""Canadian soldier"", and ""fishfly"".
Magnification*: x12
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   05.01.03 aquatic insect aquatic nymph cerci compound eye fly fresh water freshwater insect insects invertebrate invertebrates larva larvae nymph Plecoptera predator SEM 23202B aquatic larva mayfly larva mayfly larvae mayfly nymph mayfly nymphs stream mayfly may flies may fly Ephemeroptera Paleoptera naiad shadfly dayfly fishfly food web naiads pollution sensitive incomplete metamorphisis cercus gill gills Canadian soldier Baetis Baetis bicaudatus river mayfly baetid

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