Ephemeroptera
enUK| Noun | 1. | Ephemeroptera - mayflies |
Ephemeroptera
enUKEphemeroptera
[ə‚fem·ə′räp·tə·rə]Ephemeroptera
(mayflies), an order of winged insects having two similar winged phases, the subimago and imago, which are separated by a molt. During these phases, which have a duration ranging from several seconds to several days, the insects do not feed. Some species live for only one day.
The mouthparts are vestigial, and the alimentary canal has been transformed into an air bladder. The forewings have a rich network of venation and are larger than the hind wings. Sometimes hind wings are absent. The tip of the abdomen has three segmented filaments—a pair of long, lateral cerci and one median paracercus, which is sometimes much shorter than the other two.
The mayfly undergoes incomplete metamorphosis. It has a large number of larval stages (as many as 25), and development takes place in the water for one to three years.
There are 23 widely distributed families, embracing more than 2,000 species. The USSR has 17 families, with more than 200 species. Mayflies all inhabit freshwaters, but they represent various ecological groups and have adapted to various living conditions (undergrowth, mud, rapids, soil). The larvae are food for many valuable commercial fishes, including salmon and white-fish. Ephemeropteran fossils are important in stratigraphy.
REFERENCE
Opredelitel’ nasekomykh Evropeiskoi chasti SSSR, vol. 1, pages 110–36. Edited by G. Ia. Bei-Bienko. Moscow-Leningrad, 1964.O. A. CHERNOVA
Ephemeroptera
enUK
Ephemeroptera
an order of the class Insecta, containing the mayflies. They are EXOPTERGYOTES, and spend the great majority of their life in the nymphal stage and only a few minutes or hours in the nonfeeding, adult stage.Ephemeroptera
enUK- noun
Synonyms for Ephemeroptera
noun mayflies
Synonyms
- Ephemerida
- order Ephemerida
- order Ephemeroptera
Related Words
- animal order
- class Hexapoda
- class Insecta
- Hexapoda
- Insecta
- ephemerid
- ephemeropteran
- Ephemeridae
- family Ephemeridae
- drive point
- drive potty
- drive pulley
- drive pulse
- driver
- driver aid, information and routing
- driver air bag
- driver airbag
- driver air bag igniter
- driver alcohol detection system for safety
- driver alert
- driver alert control
- driver amplifier
- driver amplifier module
- driver and motor vehicle services
- driver and plate search
- driver and vehicle data online access
- driver and vehicle information database
- driver and vehicle licencing
- driver and vehicle licensing agency
- driver and vehicle licensing centre
- driver and vehicle licensing directorate
- driver and vehicle services
- driver and vehicle standards agency
- driver and whql