The EVOLUTION of ELEPHANTS and their hidden relatives : From Sea cows to Shrew moles

Afrotheria is a mammalian super-clade that likely originated in Africa, revealed by genomic data and reinforced by fossils. It includes elephants, hyraxes, sirenians, aardvarks, elephant shrews and the tenrec, golden mole group. Africa was largely isolated as an island continent through much of the Paleogene, with seaways blocking interchange until a sustained land bridge formed in the early Miocene. That long isolation set the stage for a distinctive evolutionary experiment, driving wide ecological and anatomical diversity within the clade. Early elephant relatives appear in the Eocene of North Africa, tiny Phosphatherium and Daouitherium, followed by Numidotherium, Moeritherium and Barytherium, many of them semi-aquatic, low-slung browsers with small tusks and only a hint of a trunk. Through the Oligocene and Miocene, proboscideans increased in size and complexity, evolving specialized incisors into tusks, elaborated trunks, and diverse tooth patterns in lineages such as gomphotherium and deinotherium. The survivors today, African and Asian elephants, are just the last branches of a once much bushier elephant family tree. Elsewhere in Afrotheria, parallel radiations filled very different niches: sirenians became fully aquatic herbivores; hyraxes remained small, hoof-toed rock dwellers; and aardvarks evolved tooth-reduced, ant-eating skulls and powerful digging limbs. On the small-mammal side, sengis developed elongated snouts and cursorial limbs for insect-hunting sprinting, while tenrecs and golden moles diversified into burrowers, swimmers, and hedgehog-like forms. Despite their disparate looks, shared anatomical and molecular signatures, such as aspects of the ankle, inner ear, placentation, and conserved genomic markers, tie these lineages together, tracing their roots to Africa’s long isolation and subsequent re-connections with Eurasia. Compilation of these 2 videos : Part one - https://www.youtube.com/watch?v=6zyobkp_om4 Part two - https://www.youtube.com/watch?v=o6LvWc1CL3M Music by Karl Casey Illustrations by Satoshi Kawasaki, Cisiopurple, Liam Edward and Ceri Thomas Icons next to names indicate the diet : 🪲Terrestrial arthropods / 🪱Invertebrates / 🥚Eggs / 🦎Small vertebrates / 🍇Fruits / 🌿Vegetation /🌱Seaweed-Algae / 🌾 Grass