Brazier's Ear Shell vs Colombian Oldfield Mouse

Haliotis brazieri compared with Thomasomys dispar

Key Differences

• Brazier's Ear Shell is Near Threatened while Colombian Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Brazier's Ear Shell	Colombian Oldfield Mouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Mammalia (Mammals)
Order	Lepetellida (Lepetellida)	Rodentia (Rodents)
Family	Haliotidae	Cricetidae
Genus	Haliotis	Thomasomys
Species	Haliotis brazieri	Thomasomys dispar

Evolutionary Relationship

Brazier's Ear Shell and Colombian Oldfield Mouse share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brazier's Ear Shell

NT — Near Threatened

Colombian Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Brazier's Ear Shell	Colombian Oldfield Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brazier's Ear Shell

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Found in Australia. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Brazier's Ear Shell

The Brazier's Ear Shell (Haliotis brazieri) is a species in the genus Haliotis. It is currently classified as Near Threatened on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Colombian Oldfield Mouse

<em>Thomasomys dispar</em>, commonly known as the Colombian Oldfield Mouse, is a small rodent species belonging to the genus <em>Thomasomys</em> within the family Cricetidae. This species is classified as Data Deficient, indicating that insufficient information is currently available to evaluate its conservation status with confidence. It has been documented in Colombia, where it inhabits diverse terrestrial and aquatic-adjacent environments. Members of the genus <em>Thomasomys</em> are typically associated with high-altitude Andean habitats, including páramo grasslands, shrublands, and montane forest edges, where they occupy ground-level microhabitats and burrow in soft soils. These mice are generally omnivorous, consuming seeds, plant material, and invertebrates, though specific dietary data for <em>Thomasomys dispar</em> have not been recorded. Biological traits of this species remain poorly documented in the scientific literature. The Data Deficient classification highlights the need for targeted surveys in Colombian Andean regions to determine population size, distribution, and the ecological requirements of this poorly known rodent.