''Opisthotropis alcalai'', Gary's mountain keelback , is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of natricine snake found in the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

. www.reptile-database.org.

References

Opisthotropis Reptiles described in 1961 Reptiles of the Philippines Taxa named by Walter Creighton Brown Taxa named by Alan E. Leviton {{Colubrids-stub