Black-shouldered Opossum vs Common Brassy Ringlet

Caluromysiops irrupta compared with Erebia cassioides

Taxonomic Classification

Rank	Black-shouldered Opossum	Common Brassy Ringlet
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Didelphimorphia (Didelphimorphia)	Lepidoptera (Butterflies & Moths)
Family	Didelphidae	Nymphalidae (Brush-footed Butterflies)
Genus	Caluromysiops	Erebia
Species	Caluromysiops irrupta	Erebia cassioides

Evolutionary Relationship

Black-shouldered Opossum and Common Brassy Ringlet share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Black-shouldered Opossum

LC — Least Concern

Common Brassy Ringlet

LC — Least Concern

Physical Characteristics

Attribute	Black-shouldered Opossum	Common Brassy Ringlet
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-shouldered Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Common Brassy Ringlet

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Austria, Bosnia and Herzegovina, Bulgaria, and Italy.

Black-shouldered Opossum

The Black-shouldered Opossum (Caluromysiops irrupta) is a species in the genus Caluromysiops. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Common Brassy Ringlet

The common brassy ringlet (<em>Erebia cassioides</em>) is a butterfly species endemic to high-altitude mountain environments of central and southern Europe, with documented occurrences in Austria, Bosnia and Herzegovina, Bulgaria, and Italy. This species typically inhabits all terrestrial and freshwater environments within its alpine range, favoring subalpine and alpine grasslands at elevations often exceeding 1,500 meters. It is classified as Least Concern on the IUCN Red List, reflecting a currently stable population status. As a member of the family Nymphalidae, the common brassy ringlet often feeds on grasses and sedges during its larval stage, while adult butterflies are typically found nectaring on alpine flowers. The species is often associated with calcareous grasslands and rocky slopes, where it can be seen flying in warm, sunny conditions during the summer months. Biological traits of this species remain poorly documented in the scientific literature.