A spiny armored catfish and a cowboy frog are among 46 species that may be new to science discovered in the South American country of Suriname, researchers now reveal.

The species were discovered in a scientific expedition into southwest Suriname, which holds one of the world's last pristine tropical forests.

"Our team was privileged to explore one of the last remaining areas of vast, unroaded wilderness in the world," said Trond Larsen, director of Conservation International's Rapid Assessment Program. "As a scientist, it is thrilling to study these remote forests where countless new discoveries await, especially since we believe that protecting these landscapes while they remain pristine provides perhaps the greatest opportunity for maintaining globally important biodiversity and the ecosystems people depend upon for generations to come."

The three-week survey, an initiative of the nonprofit Conservation International, explored three remote sites along the Kutari and Sipaliwini Rivers near the village of Kwamalasumutu from August to September 2010 to catalog the regions' wildlife and help develop sustainable ecotourism opportunities for the local indigenous people. The expedition included 53 scientists, indigenous Trio people, and students. [Photos of new species in Suriname]

"Water pervaded everything on our expedition," Larsen told LiveScience. "After boating many hours upstream, breaking a propeller, nearly capsizing, and porting the canoes past raging rapids amid electric eels and stingrays, we built a makeshift campsite in the forest. Our kitchen, built of sticks by the edge of the river, flooded after days of heavy rain."