Chaochiao Lazy Toad vs Chuanbei Toothed Toad

Oreolalax rugosus compared with Oreolalax chuanbeiensis

Key Differences

• Chaochiao Lazy Toad is Least Concern while Chuanbei Toothed Toad is Endangered.

Taxonomic Classification

Rank	Chaochiao Lazy Toad	Chuanbei Toothed Toad
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Amphibia (Amphibians)	Amphibia (Amphibians)
Order same	Anura (Frogs & Toads)	Anura (Frogs & Toads)
Family same	Megophryidae	Megophryidae
Genus same	Oreolalax	Oreolalax
Species	Oreolalax rugosus	Oreolalax chuanbeiensis

Evolutionary Relationship

Chaochiao Lazy Toad and Chuanbei Toothed Toad share a common ancestor at the Genus level: Oreolalax.

Conservation Status

Chaochiao Lazy Toad

LC — Least Concern

Chuanbei Toothed Toad

EN — Endangered

Physical Characteristics

Attribute	Chaochiao Lazy Toad	Chuanbei Toothed Toad
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chaochiao Lazy Toad

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Chuanbei Toothed Toad

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Chaochiao Lazy Toad

The Chaochiao Lazy Toad (Oreolalax rugosus) is a species in the genus Oreolalax. It is currently classified as Least Concern on the IUCN Red List. Typically found in freshwater habitats, moist forests, and wetlands.

Chuanbei Toothed Toad

The Chuanbei Toothed Toad (Oreolalax chuanbeiensis) is an Endangered amphibian endemic to the mountains of northern Sichuan Province in southwestern China. It belongs to the family Megophryidae, a diverse group of litter frogs and toad-like amphibians that is particularly species-rich in the eastern Himalayan and southwestern Chinese highlands. The species name chuanbeiensis refers to northern Sichuan (Chuanbei), reflecting its highly restricted geographic range. Like other Oreolalax species, the Chuanbei Toothed Toad is associated with cold, fast-flowing mountain streams, where larvae develop in torrent conditions that require specialized morphological adaptations including oral suckers. Adults are terrestrial outside the breeding season, sheltering in leaf litter and rocky crevices in montane forest. The IUCN has assessed this species as Endangered due to its small known range, ongoing habitat degradation from logging, agriculture, and infrastructure development in mountain areas, and the impacts of chytridiomycosis (amphibian chytrid fungal disease) which threatens Asian megophryid frogs. Limited survey data mean that the species' full extent of occurrence and population size are poorly constrained.