Plesielephantiformes

Deinotheriidae is a family of prehistoric elephant-like proboscideans that lived during the Cenozoic era. They first appeared in Africa during the Oligocene then spread across Europe and the lower latitudes of Asia during the Miocene epoch. Their most distinctive features were their lack of upper tusks and downward-curving tusks on the lower jaw.

Barytherium (meaning "heavy beast") is a genus of an extinct genus of large primitive proboscideans that lived during the late Eocene and early Oligocene in North Africa. The type species is Barytherium grave, found at the beginning of the 20th century in Fayum, Egypt. Since then, more complete specimens have been found at Dor el Talha, Libya. More fossils were also discovered in 2011 in the Aidum area in Dhofar by Oman's Ministry of Heritage and Culture, which was named Barytherium omansi.

Barytheriidae (meaning "heavy beasts") is an extinct family of primitive proboscideans that lived during the late Eocene and early Oligocene in North Africa and Oman. The Barytheriidae were the first large-sized proboscideans to appear in the fossil record and were characterized by a strong sexual dimorphism.

Numidotheriidae is an extinct family of primitive proboscideans that lived from the late Paleocene to the early Oligocene periods of North Africa.

Plesielephantiformes is a proposed suborder of the Proboscidea, the group containing elephants and their close relatives. It was named and circumscribed in a 2001 study by Jeheskel Shoshani and colleagues to include Deinotheriidae, as well as Numidotheriidae and Barytheriidae. While originally proposed to represent a monophyletic clade, based on the supposed unifying character of having bilophodont teeth, most modern phylogenetic studies of Proboscidea find the group to be paraphyletic, with Deinotheriidae more closely related to Elephantiformes than to other supposed members of the group.

Omanitherium (meaning "Oman beast" in Ancient Greek) is an extinct genus of barytheriid proboscidean that lived during the early Oligocene in Oman. It belongs to the family Barytheriidae, which represented the first large size proboscideans to appear in the fossil record and were characterized by a strong sexual dimorphism.