Aspen Pigmy vs Least Thorn Pigmy

Stigmella assimilella compared with Stigmella perpygmaeella

Key Differences

• Aspen Pigmy is Least Concern while Least Thorn Pigmy is Vulnerable.

Taxonomic Classification

Rank	Aspen Pigmy	Least Thorn Pigmy
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Arthropoda (Arthropods)	Arthropoda (Arthropods)
Class same	Insecta (Insects)	Insecta (Insects)
Order same	Lepidoptera (Butterflies & Moths)	Lepidoptera (Butterflies & Moths)
Family same	Nepticulidae	Nepticulidae
Genus same	Stigmella	Stigmella
Species	Stigmella assimilella	Stigmella perpygmaeella

Evolutionary Relationship

Aspen Pigmy and Least Thorn Pigmy share a common ancestor at the Genus level: Stigmella.

Conservation Status

Aspen Pigmy

LC — Least Concern

Least Thorn Pigmy

VU — Vulnerable

Physical Characteristics

Attribute	Aspen Pigmy	Least Thorn Pigmy
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Aspen Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Least Thorn Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Aspen Pigmy

The Aspen Pigmy (Stigmella assimilella) is a species in the genus Stigmella. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats. Distributed across Belgium, Denmark, Norway, and Sweden.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden