Merriam’s Pocket Mouse vs Rock Foam

Perognathus merriami compared with Stereocaulon saxatile

Key Differences

• Merriam’s Pocket Mouse is Least Concern while Rock Foam is Near Threatened.

Taxonomic Classification

Rank	Merriam’s Pocket Mouse	Rock Foam
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Mammalia (Mammals)	Lecanoromycetes (Lecanoromycetes)
Order	Rodentia (Rodents)	Lecanorales (Lecanorales)
Family	Heteromyidae	Stereocaulaceae
Genus	Perognathus	Stereocaulon
Species	Perognathus merriami	Stereocaulon saxatile

Conservation Status

Merriam’s Pocket Mouse

LC — Least Concern

Rock Foam

NT — Near Threatened

Physical Characteristics

Attribute	Merriam’s Pocket Mouse	Rock Foam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Merriam’s Pocket Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Rock Foam

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

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