Common maple aphid vs Gray-shanked Douc Langur

Periphyllus testudinaceus compared with Pygathrix cinerea

Key Differences

• Common maple aphid is Not Evaluated while Gray-shanked Douc Langur is Critically Endangered.

Taxonomic Classification

Rank	Common maple aphid	Gray-shanked Douc Langur
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum	Arthropoda (arthropodes)	Chordata (Chordates)
Class	Insecta (insecte)	Mammalia (mammifères)
Order	Hemiptera (Hemiptera)	Primates (Primates)
Family	Aphididae	Cercopithecidae (Old World Monkeys)
Genus	Periphyllus	Pygathrix
Species	Periphyllus testudinaceus	Pygathrix cinerea

Evolutionary Relationship

Common maple aphid and Gray-shanked Douc Langur share a common ancestor at the Kingdom level: Animalia. (animal)

Conservation Status

Common maple aphid

NE — Not Evaluated

Gray-shanked Douc Langur

CR — Critically Endangered

Physical Characteristics

Attribute	Common maple aphid	Gray-shanked Douc Langur
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common maple aphid

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Norway, Sweden, and United States.

Gray-shanked Douc Langur

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Common maple aphid

<em>Periphyllus testudinaceus</em>, the common maple aphid, is a small sap-sucking insect in the family Aphididae, associated primarily with maple trees of the genus Acer. It is recorded from Denmark, Norway, Sweden, and the United States. This species has not been formally evaluated for IUCN conservation status. The common maple aphid typically forms colonies on the undersides of maple leaves and along young shoots, feeding on phloem sap and potentially causing leaf curling, discoloration, and reduced tree vigor in heavy infestations. Like many aphid species, it produces honeydew as a metabolic byproduct, which attracts ants that may protect the aphid colonies in exchange. The species exhibits complex life cycles that can involve both sexual and asexual reproduction across seasons. Biological traits including body size, average lifespan, and precise dietary specializations beyond maple sap feeding remain incompletely documented. The common maple aphid is part of the broader community of invertebrates dependent on maple trees across temperate Northern Hemisphere regions.