Merriam’s Pocket Mouse vs Spotted Brittlestem

Perognathus merriami compared with Psathyrella maculata

Key Differences

• Merriam’s Pocket Mouse is Least Concern while Spotted Brittlestem is Vulnerable.

Taxonomic Classification

Rank	Merriam’s Pocket Mouse	Spotted Brittlestem
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Basidiomycota (Club Fungi)
Class	Mammalia (Mammals)	Agaricomycetes (Mushrooms)
Order	Rodentia (Rodents)	Agaricales (Gilled Mushrooms)
Family	Heteromyidae	Psathyrellaceae
Genus	Perognathus	Psathyrella
Species	Perognathus merriami	Psathyrella maculata

Conservation Status

Merriam’s Pocket Mouse

LC — Least Concern

Spotted Brittlestem

VU — Vulnerable

Physical Characteristics

Attribute	Merriam’s Pocket Mouse	Spotted Brittlestem
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Merriam’s Pocket Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Spotted Brittlestem

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

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.