Where are plesiadapiformes found?

Plesiadapiforms are a diverse group of euarchontan mammals known from the Palaeocene and Eocene of North America, Europe and Asia.

Do Plesiadapiforms have a Petrosal Bulla?

In fact, the only plesiadapiform with an arterial pattern remotely resembling that of early primates of modern aspect (or ‘euprimates’) is the microsyopid Cynodontomys, but it is often regarded as non-primate because it lacks a petrosal bulla.

How old is plesiadapiforms?

between 65 and 55 million years ago
Plesiadapiformes first appear in the fossil record between 65 and 55 million years ago, although many were extinct by the beginning of the Eocene. They may have been the first mammals to have finger nails in place of claws.

How old are plesiadapiforms?

The first record of plesiadapiforms appears just as the non-avian dinosaurs were going extinct about 65 million years ago, near the beginning of the Paleocene. Some plesiadapiforms persist well into the Eocene, with the last species going extinct around 37 million years ago (Silcox & Gunnell, 2008).

Do plesiadapiforms have a postorbital bar?

Dentally, plesiadapiforms look quite similar to definitive primates, with broad talonid basins and a similar pattern of cusps and crests. However, no known plesiadapiform exhibits the features of living primates associated with specialized vision, such as the postorbital bar or convergent orbits.

What are plesiadapiforms also called?

Plesiadapiforms are also called: proprimates. The calcaneus (heel bone) of Eosimias suggests that it may be a very primitive: anthropoid.

Do plesiadapiforms have tooth combs?

In addition to numerous postcranial specializations for gliding, dermopterans also exhibit peculiar features of the teeth, including incisors that literally have tines like a comb (Figure 5).

Where did the Notharctus live?

Notharctus is a genus of adapiform primate that lived in North America and Europe during the late to middle Eocene. The body form of Notharctus is similar to that of modern rats.