ANT 1 Lecture Notes - Lecture 9: Clavicle, Ponginae, Hominidae
Document Summary
More complete closure of the orbit (post-orbital plate, in addition to post-orbital bar) (derived) Tarsiers retain some primitive traits that they share with many strepsirrhines: small, nocturnal, vertical clinging & leaping insectivorous, unfused mandible. But they share some derived traits with other haplorrhines, which is why we put them in this group: Tarsiers move through the trees with vertical clinging and leaping. They have an elongated tarsal bones to help them spring forward. Tarsiers: mostly nocturnal, solitary, only primate that is completely carnivorous. Platyrrhine traits: widely-spaced, sideways-facing nostrils, 3 premolars (ancestral, some species have prehensile tails, unique derived trait not found in other primates, found in central and south america. Key catarrhine traits: 2 premolars instead of 3 (derived, honing complex of upper canine against lower premolar, sharpens canine like a knife, this trait is lost in our own lineage. Sectorial premolar = has special surface for upper canine to hone against.
