**Mayfly Species Centroptilum triangulifer (Blue-Winged Olive)**

Mayflies

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Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetidae (Blue-Winged Olives)

» Genus Centroptilum (Blue-Winged Olives)

» Species triangulifer (Blue-Winged Olive)

Common Names

Match	Common Name
	Blue-Winged Olive
	Gray-Winged Olive Quill
	Tiny Sulphur Dun

Fly Imitations by Orvis

Stage	Fly Pattern
Dun	Blue Winged Olive

This species is frequently studied by entomologists because its populations are entirely female, and they reproduce by parthenogenesis (Parthenogenesis: In some species of insects and other living things, such as the mayfly species Ameletus ludens, reproduction can take place without fertilization by a male. This process is called parthenogenesis.). Each specimen is a genetic clone of thousands of others, and there are several "lines" of clones. A 2006 study by three entomologists found from 7 to 25 different lines of clones in each of four streams, and they found some identical clones as far apart as 700km.

Where & When

Region: East
Time Of Year (?): Summer

This species may produce more than one brood per year.

Nymph Biology

Environmental Tolerance: Moderate to highly tolerant of pollution

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Jargon Defined:

Brood: When a species produces more than one generation per year, each one is called a brood.

Parthenogenesis: In some species of insects and other living things, such as the mayfly species Ameletus ludens, reproduction can take place without fertilization by a male. This process is called parthenogenesis.

Useful References:

Funk DH; Jackson JK; Sweeney BW. 2006. Taxonomy and genetics of the parthenogenetic mayfly Centroptilum triangulifer and its sexual sister Centroptilum alamance (Ephemeroptera: Baetidae). Journal of the North American Benthological Society 25: 417-429.

Knopp, Malcolm and Robert Cormier. 1997. Mayflies: An Angler's Study of Trout Water Ephemeroptera . The Lyons Press.

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