Pistachio-grass root aphid

Forda formicaria

Forda formicaria is a species of aphids.
Pistachio-grass root aphid - Forda formicaria A couple of years ago I noticed two types of galls on Pistacia terebinthus. Photos taken in Greece, Sithonia.
This type of galls is cased by the Pistachio-grass root aphid - Forda formicaria.
https://influentialpoints.com/Gallery/Forda_formicaria_grass_root_aphid.htm 
 Animal,Animalia,Aphididae,Aphidomorpha,Arthropoda,Forda formicaria,Geotagged,Greece,Insect,Insecta,Pistachio-grass root aphid,Spring,Wildlife

Distribution

They are distributed in the Mediterranean region and south-west Asia, Forda formicaria forms half-moon-shaped galls on its primary host Pistacia species (pistachio). Alates leave the galls in September to November, and move to the roots of numerous grasses and cereals where they found colonies. In many other parts of the world (northern Europe, parts of Asia and North America), host alternation (and sexual reproduction) have been lost, and they live on the roots of grasses all year round. Forda formicaria are always attended by ants, and often live within ants' nests.

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Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassInsecta
OrderHemiptera
FamilyAphididae
GenusForda
SpeciesForda formicaria
Photographed in
Greece