Symydobius oblongus (von Heyden, 1837)

shiny birch-aphid

on Betula

Betula, England © Bob Dransfield & Bob Brightwell, InfluentialPoints

gall

The shining brown aphids, not covered by wax, sit on the 3-4 year old branches and twigs. They are visited by ants. Upon disturbance they do not let themselves drop to the ground but crawl away.

host plants

Betulaceae, monophagous

Betula nana, pendula, pubescens.

synonyms

Symydobius piceus Börner, 1950.

references

Bachmaier (1965a), Barbagallo & Pollini (2014a), Blackman & Eastop (2015), Börner & Franz (1956a), Börner & Heinze (1957a), Buhr (1964b), Dransfield & Brightwell (2015a), Heie (1982a), Hellrigl (2004a), Houard (1908a), Lampel & Meier (1982a), Mier Durante & Nieto Nafría (1997a), Müller & Horatschek (1980a), Nieto Nafría & Mier Durante (1998a), Osiadacz & Wojciechowski (2008a), Petrović (1998a), Ripka, Reider & Szalay-Marzsó (1998a, Stroyan (1977a), Tambs-Lyche & Heie (1994a), Tomasi (2014a), Wieczorek & Kanturski (2011a), Wojciechowski, Depa, Halgoš ao (2016a).