There are many species of Tamarin and Marmoset monkeys, with new species still being discovered and described today. For further dietary advice (nutrition, quantity, feeding methods etc.) Color: Marmosets have a flattened black face, thick white tufts on its ears, and long black and white fur.The tail is white ringed with black. Things You Need to Know Before Having Pygmy Marmosets as Pets. Pygmy Marmosets are one of the smallest primates and they are the smallest monkey in the world. A pygmy marmoset claims the title as the smallest monkey in the world. They have a body length between 12 and 15 cms (4.75 - 6 inches), a tail length between 17 and 23 cms (7 - 9 inches) and they weigh between 100 and 125 g (3.53 - 4 oz). The pygmy marmoset is greatly uncommon, also known as, dwarf marmoset, chi chic, monkey pocket or red skin. Newborn : Normally born with eyes open. We have several species of small monkeys that call Symbio Wildlife Park. The pygmy marmoset is greatly uncommon, also known as, dwarf marmoset, chi chic, monkey pocket or red skin. Weight at birth: .4 to .5 ounces (3 to 15 grams) Age of maturity: 1.5 to 2 years. Finger monkey’s scientific name is Pygmy marmoset, these monkey have weight more than 100 gram or 3.5 oz, finger money are so small that they can be fitted on your palm and also can climb on your finger, they have a height same as a human finger that is why these Pygmy marmoset monkeys called finger money or pocket monkey.. Geoffroy’s Marmoset. Head and body : 60-80mm, weight : 30g Body covered with fine gray hair, tail with dark and grayish bands. Finger monkey’s scientific name is Pygmy marmoset, these monkey have weight more than 100 gram or 3.5 oz, finger money are so small that they can be fitted on your palm and also can climb on your finger, they have a height same as a human finger that is why these Pygmy marmoset monkeys called finger money or pocket monkey.. The pygmy marmoset is the smallest monkey but not the smallest primate—that title belongs to the mouse lemur. A Pygmy marmoset needs 1-2 acres, as they live in family groups. This means it weighs about the same as one stick of butter from your fridge at home. Distribution: Southeast Brazil.. Social groups: family groups of 4-15 individuals (in captivity max 12). They clamber among the thick vegetation in search of food throughout the day, being most active in the cooler hours at the beginning and end of each day. Both of these groups of monkeys only occur in Central and South America. see EAZA Husbandry Guidelines – section 2.2; Food Enrichment. About. Weight: 10-18 ounces (300-500 grams).