beaded chestnut vs Common maple aphid

Agrochola lychnidis compared with Periphyllus testudinaceus

Key Differences

• beaded chestnut is Near Threatened while Common maple aphid is Not Evaluated.

Taxonomic Classification

Rank	beaded chestnut	Common maple aphid
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Arthropoda (節足動物)	Arthropoda (節足動物)
Class same	Insecta (昆虫)	Insecta (昆虫)
Order	Lepidoptera (チョウ目)	Hemiptera (カメムシ目)
Family	Noctuidae	Aphididae
Genus	Agrochola	Periphyllus
Species	Agrochola lychnidis	Periphyllus testudinaceus

Evolutionary Relationship

beaded chestnut and Common maple aphid share a common ancestor at the Class level: Insecta. (昆虫)

Conservation Status

beaded chestnut

NT — Near Threatened

Common maple aphid

NE — Not Evaluated

Physical Characteristics

Attribute	beaded chestnut	Common maple aphid
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

beaded chestnut

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Common maple aphid

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

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

beaded chestnut

The Beaded chestnut (Agrochola lychnidis) is a species in the genus Agrochola. It is currently classified as Near Threatened on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

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.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden