Merriam’s Pocket Mouse vs

Perognathus merriami compared with Usnea cornuta

Key Differences

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

Taxonomic Classification

Rank	Merriam’s Pocket Mouse
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Mammalia (Mammals)	Lecanoromycetes (Lecanoromycetes)
Order	Rodentia (Rodents)	Lecanorales (Lecanorales)
Family	Heteromyidae	Parmeliaceae
Genus	Perognathus	Usnea
Species	Perognathus merriami	Usnea cornuta

Conservation Status

Merriam’s Pocket Mouse

LC — Least Concern

NT — Near Threatened

Physical Characteristics

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

Habitat & Geographic Range

Merriam’s Pocket Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

Usnea cornuta is a fruticose lichen in the family Parmeliaceae, assessed as Near Threatened (NT). It forms shrubby, branching thalli that hang from tree branches and twigs, typically in humid forest environments. Like all Usnea species, it is highly sensitive to air pollution, particularly sulfur dioxide, making it a useful bioindicator of air quality.