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Along with caddisfly larvae and gastropod molluscs, the grazing of mayfly nymphs has a significant impact on the primary producers, the plants and algae, on the bed of streams and rivers. [26] The nymphs are eaten by a wide range of predators and form an important part of the aquatic food chain. Fish are among the main predators, picking nymphs ...
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.
Hexagenia limbata, the giant mayfly, is a species of mayfly in the family Ephemeridae. It is native to North America where it is distributed widely near lakes and slow-moving rivers. [ 2 ] The larvae, known as nymphs, are aquatic and burrow in mud and the adult insects have brief lives.
Oligoneuriidae is a family of mayflies with a pantropical distribution. They are also known as brushlegged mayflies due to the presence of two rows of setae used for filtration on the front legs of their nymphs.
The nymphs of E. vulgata burrow into the sediment at the bottom of ponds. Most burrowing mayfly nymphs use the gills on their abdomens to create a current of water through their burrows, thereby ensuring sufficient oxygen is available to absorb through the tracheae in their skin.
Nymph Male imago of Baetis tricaudatus Baetis sahoensis. Baetis is a genus of mayflies of the family Baetidae, known as the blue-winged olive to anglers.There are at least 150 described species in Baetis.
Hexagenia bilineata is a species of mayfly in the family Ephemeridae. It is native to North America where it is found in the Upper Mississippi Valley. Sometimes adults of this mayfly are so abundant as to cause a nuisance because of their enormous numbers. The larvae are aquatic and burrow in mud and the adult insects have brief lives.
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.