μυοκάστορας → coypu, nutria
μυοκάστωρ
νούτρια
The genus name Myocastor derives from the two Ancient Greek words μῦς (mûs), meaning "rat, mouse", and κάστωρ (kástōr), meaning "beaver". Literally, therefore, the name Myocastor means "beaver rat".
Two names are commonly used in English for Myocastor coypus. The name "nutria" (from Spanish word nutria, meaning 'otter') is generally used in North America, Asia, and throughout countries of the former Soviet Union; however, in most Spanish-speaking countries, the word "nutria" refers primarily to the otter. To avoid this ambiguity, the name "coypu" or "coipo" (derived from the Mapudungun language) is used in Latin America and parts of Europe. In France, the coypu is known as a ragondin. In Dutch, it is known as beverrat (beaver rat). In German, it is known as Nutria, Biberratte (beaver rat), or Sumpfbiber (swamp beaver). In Italy, instead, the popular name is, as in North America and Asia, "nutria", but it is also called castorino ("little beaver"), by which its fur is known in Italy. In Swedish, the animal is known as sumpbäver (marsh/swamp beaver). In Brazil, the animal is known as ratão-do-banhado (big swamp rat), nútria, or caxingui (the last from the Tupi language).
Coypu - Wikipedia