Tiffanian

The Tiffanian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 60,200,000 to 56,800,000 years BP lasting 3.4 million years.^[1]

It is usually considered to overlap the Selandian and Thanetian within the Paleocene.

The Tiffanian is preceded by the Torrejonian and followed by the Clarkforkian NALMA stages.

Substages

The Tiffanian is considered to contain the following substages:

• Ti6: Lower boundary source of the base of the Tiffanian (approximate).
• Ti5 Lower boundary source of the base of the Tiffanian (approximate) and upper boundary source of the base of the Clarkforkian (approximate).
• Ti4: Lower boundary source of the base of the Tiffanian (approximate) and upper boundary source of the base of the Clarkforkian (approximate).
• Ti3: Lower boundary source of the base of the Tiffanian (approximate) and upper boundary source of the base of the Clarkforkian (approximate).
• Ti2: Lower boundary source of the base of the Tiffanian (approximate) and upper boundary source of the base of the Clarkforkian (approximate).
• Ti1: Upper boundary source of the base of the Clarkforkian (approximate)

Fauna

Notable mammals^[2][3][4]

Multituberculata - non-therian mammals

• Neoplagiaulax, neoplagiaulacid multituberculate
• Ptilodus, squirrel-sized ptilodontid

Metatheria - marsupials

• Peradectes, peradectid marsupial

Apatotheria - primitive, arboreal mammals

• Labidolemur, aye-aye-like arboreal mammal

Condylarthra - archaic ungulates

• Claenodon, large, arctocyonid condylarth
• Ectocion, phenacodontid condylarth
• Lambertocyon, arctocyonid condylarth
• Phenacodus, phenacodontid condylarth
• Thryptacodon, raccoon-like arctocyonid condylarth

Dinocerata - large, tusked herbivores

• Probathyopsis, early North American uintathere

Eulipotyphla - insectivorous mammals

• Adunator, erinaceomorph insectivore
• Leptacodon, nyctitheriid insectivore
• Litocherus, erinaceomorph insectivore

Primatomorpha - primates and relatives

• Carpodaptes, carpolestid plesiadapiform
• Carpolestes, carpolestid plesiadapiform
• Chiromyoides, small plesiadapid
• Ignacius, paramomyid plesiadapiform
• Nannodectes, basal plesiadapid
• Phenacolemur, paramomyid plesiadapiform
• Plesiadapis, plesiadapid plesiadapiform

Proteutheria - basal eutherians

• Palaeoryctes, small insectivorous mammal