What is the difference between catarrhines and platyrrhines?

Catarrhines and platyrrhines are distinguished by the shape of their nostrils. Catarrhines have narrow downward facing nostrils, while platyrrhines have broad, flat, sideways facing nostrils. There are certain physical features that help set primates apart from other animals.

What are the unique characteristics of platyrrhine monkeys?

Platyrrhines are primates belonging to the parvorder Platyrrhini. They are characterized by having a broad, flat nose and with sideways-facing nostrils. They have prehensile tails, which are long, grasping tails. They have twelve premolars (as opposed to the eight premolars in catarrhine primates).

What characteristics of Catarrhini do humans exhibit?

Catarrhines are simians belonging to the parvorder Catarrhini. They are characterized by having a narrow nose. Their nostrils are close together as opposed to platyrrhines that have a flat-bridged nose.

Are howler monkeys catarrhines or platyrrhines?

The howler monkey is the only primate other than catarrhines that is known to have full trichromatic vision (4, 55–58).

What is the difference between Haplorhines and Strepsirhines?

Strepsirhines have longer snouts, smaller brains and a more highly developed sense of smell than haplorhines. Haplorhines have shorter faces, larger brains and a more highly developed sense of vision than Strepsirhines; their eyes face more forward than the eyes of strepsirhines.

What do all catarrhines have?

All catarrhines possess two incisors in each quadrant. They are never procumbent, as in prosimian primates, and this is a trait that characterizes all anthropoids. The canine teeth are usually large with a large root and are always larger and usually taller in height than the incisors (Fig.

Do hominoids have Y 5 molars?

Within this grouping, the two families Hylobatidae and Hominidae can be distinguished from Old World monkeys by the number of cusps on their molars; hominoids have five in the “Y-5” molar pattern, whereas Old World monkeys have only four in a bilophodont pattern.

What best describes an adaptation of Colobine monkeys from Asia and Africa?

What best describes an adaptation of colobine monkeys from Asia and Africa? They have developed a digestive tract that allows them to eat large amounts of leaves and derive nutrition from them.

How do Haplorhines differ from Strepsirhines?

Are lemurs platyrrhines?

There are three major surviving radiations – lemurs and lorises (strepsirhines) and Old World monkeys and apes (catarrhines) occur in Africa and Asia, and New World monkeys (platyrrhines) live in Central and South America – but many species are now threatened with extinction and the fourth radiation consists of only …

What is one way Haplorhines differ from Strepsirhines quizlet?

Strepsirhines have a two part mandible and Haplorhines have a fused one. an arrangement of the cusps and grooves of the lower molars that is characteristic of hominids.

What is the primary difference between the two Suborders?

The primary difference between the two suborders, Mysticeti and Odontoceti, has to do with the whale’s feeding hardware.

How are platyrrhine and catarrhine monkeys different?

Remember that these classifications represent two different evolutionary branches, so they are actually pretty distinct. The most obvious difference is the shape of the nose: platyrrhine means flat-nosed, while catarrhine means hook-nosed.

How are platyrrhines different from other anthropoids?

In addition, platyrrhines have a large body size in comparison to catarrhines. Platyrrhines and catarrhines are the two parvorders of the infraorder Simiiformes, consisting of anthropoids. Generally, they differ by their nose shape, tail, number of premolar teeth, thumb, and the ectotympanic bone (ear bone).

What are the main features of a platyrrhine?

In addition to these, the main significant features of Platyrrhines include their prehensile tail, three premolar teeth in each quadrant, wide nasal septum, a thumb that is not opposable]

What are the superfamilies of a catarrhine?

In addition, the superfamilies of catarrhines include Propliopithecoidea, Pliopithecoidea, Dendropithecoidea, Saadanioidea, Parapithecoidea, Cercopithecoidea, and Hominoidea.