title: Field observation of twinning in the dusky titi monkey, Callicebus cupreus.
authors.affiliation: AG Verhaltensforschung/Okologie, Göttingen, Deutschland.
authors.forename: C
authors.initials: C
authors.lastname: Knogge
authors.forename: E W
authors.initials: EW
authors.lastname: Heymann
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D002427:Cebidae; D005260:Female; D008297:Male; D011247:Pregnancy; D013045:Species Specificity; D014427:Twins