Dwarf round ray vs Ecuadorian Cotton Rat

Urotrygon nana compared with Sigmodon inopinatus

Key Differences

• Dwarf round ray is Near Threatened while Ecuadorian Cotton Rat is Vulnerable.

Taxonomic Classification

Rank	Dwarf round ray	Ecuadorian Cotton Rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Myliobatiformes (Myliobatiformes)	Rodentia (Rodents)
Family	Urotrygonidae	Cricetidae
Genus	Urotrygon	Sigmodon
Species	Urotrygon nana	Sigmodon inopinatus

Evolutionary Relationship

Dwarf round ray and Ecuadorian Cotton Rat share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Dwarf round ray

NT — Near Threatened

Ecuadorian Cotton Rat

VU — Vulnerable

Physical Characteristics

Attribute	Dwarf round ray	Ecuadorian Cotton Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Dwarf round ray

Ecuadorian Cotton Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.