川北齿蟾 vs 大齿蟾

Oreolalax chuanbeiensis compared with Oreolalax major

Key Differences

• 川北齿蟾 is Endangered while 大齿蟾 is Least Concern.

Taxonomic Classification

Rank	川北齿蟾	大齿蟾
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Amphibia (两栖动物)	Amphibia (两栖动物)
Order same	Anura (无尾目)	Anura (无尾目)
Family same	Megophryidae	Megophryidae
Genus same	Oreolalax	Oreolalax
Species	Oreolalax chuanbeiensis	Oreolalax major

Evolutionary Relationship

川北齿蟾 and 大齿蟾 share a common ancestor at the Genus level: Oreolalax.

Conservation Status

川北齿蟾

EN — Endangered

大齿蟾

LC — Least Concern

Physical Characteristics

Attribute	川北齿蟾	大齿蟾
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

川北齿蟾

Habitat

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

大齿蟾

Habitat

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

川北齿蟾

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.

大齿蟾

The Common Lazy Toad (<em>Oreolalax major</em>) is an amphibian in the family Megophryidae, classified as Least Concern on the IUCN Red List. The species typically inhabits freshwater habitats, moist forests, and wetlands, favoring cool, humid environments associated with mountain streams and adjacent riparian vegetation. As a member of the family Megophryidae, it is adapted to fast-flowing, clear mountain streams where larvae typically develop among leaf litter and gravel on the stream bed. The Common Lazy Toad is generally associated with the highland and montane zones of its range, relying on intact forest cover and unpolluted water bodies for reproduction and larval development. Its Least Concern status reflects an assessment of stable population trends, though like many amphibians it may be sensitive to changes in water quality, habitat loss, and emerging infectious diseases such as chytridiomycosis. Biological traits of this species remain poorly documented in the scientific literature.