Callithrix geoffroyi
White-fronted marmosets are small primates measuring about 8 in. (200 mm) in length. Females usually weigh about 7 oz. (190 grams), and males weigh about 8-9 oz. (230 to 350 grams). Their bodies are blackish brown and their tails are ringed with grey and black bands. Adults have a white face and throat. Juveniles do not have white markings until they are about five months old.