Final answer:
Strepsirrhine primates are characterized by a grooming claw on the second toe, a toothcomb of tightly packed incisors, larger olfactory centers, and the ability to synthesize vitamin C. They are considered more 'primitive' than other primates, with generally smaller size and brains.
Step-by-step explanation:
Strepsirrhines are a suborder of primates known as the "wet-nosed" primates, which includes species like lemurs, lorises, and bush babies. These strepsirrhine primates have several distinct anatomical features compared to their Haplorrhini counterparts, the "dry-nosed" primates. One prominent feature is a grooming claw on their second toe, which is specialized for personal care. Another significant feature is the presence of a toothcomb, which consists of forward-facing incisors in the lower jaw that are tightly packed. Strepsirrhines generally have larger olfactory centers in the brain, indicating a heightened sense of smell, which is important for their nocturnal lifestyle. Additionally, strepsirrhines possess enzymes to synthesize vitamin C, unlike haplorhines who must acquire it through their diet. The primitive nature of these primates is reflected in their smaller size and brain compared to other primate groups.