Figure 7
From: Comparative aspects of trophoblast development and placentation
Cladogram based on nucleotide sequence analysis. The four superorders of eutherian mammals and the marsupial outgroup are shown in bold face. Epitheliochorial placentation, indicated in red, occurs in three orders of Laurasiatheria and one suborder of Euarchontoglires. These are the orders Cetartiodactyla (whales, pigs and hippopotami, camels, ruminants); Perissodactyla (horses, tapirs and rhinoceroses); Pholidota (pangolins or scaly anteaters); and the primate suborder Strepsirhina (lemurs and lorises).