Malayan Pit Viper
Calloselasma rhodostoma
- Least concern
- Card rarity: Common
- Reptiles

Calloselasma is a monotypic genus created for a pit viper species, Calloselasma rhodostoma, which is endemic to Southeast Asia from Thailand to northern Malaysia and on the island of Java. No subspecies are currently recognized.
Classification
- Class
- Reptilia
- Order
- Squamata
- Family
- Viperidae
- Genus
- Calloselasma