Langhian extinctions

Isotemnidae is a paraphyletic extinct family of notoungulate mammals known from the Paleocene (Las Flores Formation, Itaboraian) to Middle Miocene (Honda Group, Laventan) of South America.

alt=Reconstruction of the astrapothere Xenastrapotherium christi. Artwork created with graphite and colored pencils. Author: Edwin Chávez "Disfrasaurio".|thumb|Paleoart of Xenastrapotherium christi. Artwork by Edwin Chávez "Disfrasaurio". Xenastrapotherium is an extinct genus of astrapothere, a type of hoofed herbivorous mammal, native to South America, which lived in the Middle to Late Miocene period, typically during the Laventan stage. It is a member of the family Astrapotheriidae in the subfamily Uruguaytheriinae, large astrapotheres, equipped with a trunk-like nose and protruding teeth, s

mass extinction event; occurred ca. 14 Mya, during the Langhian stage of the Miocene, caused by a period of cooling

Allodelphinidae is a family of primitive platanistoid river dolphins found in marine deposits in the eastern North Pacific region, Alaska, and Japan.