Pineus

Taxonomy

Domain	Eukarya
Kingdom	Animalia
Phylum	Arthropoda
Subphylum	Hexapoda
Class	Insecta
Subclass	Pterygota
Infraclass	Neoptera
Superorder	Paraneoptera
Order	Hemiptera
Suborder	Sternorrhyncha
Superfamily	Aphidoidea
Family	Adelgidae

Scientific Name

Pineus

Common Name

pine and spruce adelgids

Pineus (spruce-pine adelgids) is a genus of aphids in the order Hemiptera, family Adelgidae. They have a complex life history, involving up to five generations using two conifer host species, the primary host a spruce on which they form galls, the secondary host a pine, on which they are free-living, usually covered with a woolly white wax secretion. In several species, the spruce host is not, or only rarely, used, the species being able to complete its life cycle parthenogenetically on the alternate host.

Species and hosts

Species Spruce host Pine host Pineus borneri – Pinus subgenus Pinus spp. Pineus pini Picea orientalis Pinus sylvestris Pineus pinifoliae Picea spp. Pinus subgenus Strobus spp. Pineus similis Picea glauca, Picea sitchensis Pinus spp. Pineus strobi Picea mariana Pinus strobus

The closely related genus Adelges uses spruces and other Pinaceae genera.

References

• Davies, J. M. (1968). Adelgids attacking spruce and other conifers. Forestry Commission Leaflet 7.