Coypu In turn, these two taxa share evolutionary affinities with other Myocastorini genera: "Proechimys" and "Hoplomys" (armored rats) on the one hand, and "Thrichomys" on the other hand. The coypu somewhat resembles a very large rat, or a beaver with a small tail. Adults are typically in weight, and in body length, with a 30 to 45 cm (12 to 18 in) tail. It is possible for coypu to weigh up to , although adults usually average . They have coarse, darkish brown outer fur with soft dense grey under fur, also called the nutria. Three distinguishing features are a white
Given name by the parents at birth. In informal situations, given names are often used in a familiar and friendly manner. In more formal situations, a person's surname is more commonly used—unless a distinction needs to be made between people with the same surname. The idioms "on a first-name basis" and "being on first-name terms" refer to the familiarity inherent in addressing someone by their given name. By contrast, a surname (also known as a family name, last name, or "gentile" name), which is normally inherited, is typically shared with other members of one's immediate family. Regnal names and religious or monastic