Anoecia corni
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Anoecia corni |
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| ( Fabricius , 1775) |
Anoecia corni is an aphid from the subfamily Anoeciinae . This is usually assigned to the family of the tube aphids (Aphididae). However, some authors place the Anoeciinae in their own family Anoeciidae. In English the species bears the name Dogwood Aphid (" dogwood aphid").
Way of life and characteristics
Like most aphid species, Anoecia corni shows a generation change . It trains at least two generations a year. The species overwinters as an egg. The aphids hatched in spring are exclusively female. These develop on dogwood ( Cornus ) and have reduced eyes and 5-part antennae . The other generations in the year, which consist of both males and females, on the other hand, have large compound eyes and 6-part antennae. The two siphons ( siphunculi ) on the abdomen are inconspicuous pores . The larvae of the bisexual generations develop on the roots of sweet grasses , which also include cereals . The last of these generations will return to the dogwood plants in the fall. The winged forms of the species have a large black wing mark on the front wing. The aphids have a black body. In the bisexual generation, there is a white transverse ligament on the front part of the abdomen . The adjoining tergites 3 to 6, however, are black. There are similar species of aphids. These can usually be differentiated based on the rhinaria of the antennae. The winged forms have a body length between 1.9 and 3 mm. In areas where the aphid species is not native and the dogwood is missing as a host plant, all generations of Anoecia corni use grass and cereal plants as hosts. In the spring, ants like the black garden ant are often found with the aphids .
distribution
The species is widespread in Europe. It is only missing in Iceland . In addition, the species occurs in the Afrotropic , on the Azores , on the Canary Islands , in the eastern Palearctic and in the Nearctic and Neotropical . The species was introduced in North America and South Africa.
Taxonomy
The following synonyms can be found in the literature :
- Aphis corni Fabricius , 1775
- Anoecia graminis
- Anoecia obscura
- Anoecia agrostidis Borner , 1950
- Anoecia disculigera Borner , 1950
Individual evidence
- ↑ a b Anoecia corni . www.biolib.cz. Retrieved November 17, 2018.
- ↑ a b c d e f g h i j Anoecia corni - Common dogwood-grass aphid . influentialpoints.com. Retrieved November 17, 2018.
- ↑ a b Species Anoecia corni - Dogwood Aphid . bugguide.net. Retrieved November 17, 2018.
- ↑ a b c d Anoecia (Anoecia) corni (Fabricius, 1775) in Fauna Europaea. Retrieved November 17, 2018
Web links
Wikispecies: Anoecia corni - species directory