Atlantic Pouncewort vs Colombian Oldfield Mouse

Lejeunea mandonii compared with Thomasomys dispar

Key Differences

• Atlantic Pouncewort is Vulnerable while Colombian Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Atlantic Pouncewort	Colombian Oldfield Mouse
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Marchantiophyta (liverwort)	Chordata (Chordates)
Class	Jungermanniopsida (Jungermanniopsida)	Mammalia (Mammals)
Order	Porellales (Porellales)	Rodentia (Rodents)
Family	Lejeuneaceae	Cricetidae
Genus	Lejeunea	Thomasomys
Species	Lejeunea mandonii	Thomasomys dispar

Conservation Status

Atlantic Pouncewort

VU — Vulnerable

Colombian Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Atlantic Pouncewort	Colombian Oldfield Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Pouncewort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Portugal. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Atlantic Pouncewort

The Atlantic Pouncewort (Lejeunea mandonii) is a species in the genus Lejeunea. It is currently classified as Vulnerable on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

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.