Final answer:
Strepsirhini is a suborder of primates that includes species like lemurs and lorises, characterized by specific features such as a grooming claw and a toothcomb. They primarily inhabit the Old World regions and tend to be nocturnal with a strong sense of smell.
Step-by-step explanation:
The suborder Strepsirhini includes primates such as lemurs, lorises, and bush babies, which are characterized by several unique anatomical features. These strepsirhines have a grooming claw on their second toe and incisors in the lower jaw that form a toothcomb. This group of primates is part of the broader Order of Primates, which is divided into the Strepsirhini ("turned-nosed") and the Haplorhini ("simple-nosed") primates. While strepsirhines are generally nocturnal and rely heavily on their olfactory sense, their haplorhine counterparts, which include simians and tarsiers, tend to be diurnal and rely more on vision.
There are seven families of living strepsirhines, most of which are located in the Old World regions of Africa, Asia, and Europe. Of the living strepsirhines, five groups are endemic to the island of Madagascar, while two more are dispersed across Africa and Asia.
A notable example of a strepsirhine primate is the pygmy slow loris (Nycticebus pygmaeus), which can be found in regions such as Vietnam, Laos, and a province in China.