Callitrichidae is a family of small New World primates. The family is restricted to Panama south to Argentina. curiously the family can not be found in Venezuela.The family is divided into four genera. All four genera have the same basic body plan and are similar in size. The main difference is in the dental structure and correlates with diet. The marmosets belong the the genus Callithrix. They have enlarged incisors which are even with the canines allowing for the incisors to chew through the bark of trees to get to the gum of the tree. The tamarins, Saguinus, are on average slightly larger and have longer canines. they feed mainly on fruit and some insects. The largest genus is Leontopithicus which are the lion tamarins. These are both the largest an most colorful with all species having at least a part of the body having a bright orange coloration. The fourth genera is Callimico has only one species. This species has three molars instead of the two found in other callitrichids. There are 43 species in the family.