Journal of Mammalogy 85(4), 788–796 (2004), DOI 10.1644/BNS-012. Printed p. 788 supplies the title above and the byline Matthias Asher, Elisabeth Spinelli de Oliveira and Norbert Sachser. The institutional export instead abbreviates the first author as Asher MR; the printed paper explicitly names Matthias Asher. A six-month southeastern-Brazil field study combined radiotelemetry, direct observation and DNA fingerprinting. The abstract's historical assertion about domestic-guinea-pig ancestry is not treated as evidence from this field study.