noun
Brazilian guinea pig
Refers to the species Cavia aperea, a wild guinea pig native to South America. Not a common pet; distinct from the domesticated guinea pig (Cavia porcellus).
パンパステンジクネズミは南アメリカの草原に生息している。
The Brazilian guinea pig inhabits the grasslands of South America.
動物園でパンパステンジクネズミを見た。
I saw a Brazilian guinea pig at the zoo.
Refers to the domesticated guinea pig (Cavia porcellus), commonly kept as a pet. パンパステンジクネズミ is a specific wild species.
From パンパス (pampas, referring to the South American grasslands) + 天竺鼠 (guinea pig). The exact derivation is uncertain, but the name describes its habitat and resemblance to the domesticated guinea pig.