Docodonta es un orden de ancestros de los mamíferos actuales que vivieron desde mediados hasta finales del Mesozoico. Sus rasgos físicos distintivos estaban constituidos por un juego de molares sofisticados, carácter que le da el nombre al grupo. Se han encontrado fragmentos fósiles en las antiguas Laurasia (actualmente Norteamérica, Europa, y Asia), y Gondwana (hoy en día India y el Hemisferio Sur). Los docodontos se han considerado un grupo de mamaliaformes justo en el umbral de los mamíferos, pero también se han considerado como mamíferos basales situados en la subclase parafilética Allotheria. Se piensa que los docodontos eran principalmente herbívoros o insectívoros, sin embargo la dentadura de Castorocauda hacía pensar que se alimentaba de peces.

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Docodonta is an order of extinct mammaliaforms that lived during the mid- to late-Mesozoic era. Their most distinguishing physical features were their relatively sophisticated molar teeth, from which the order gets its name. Until recently, Docodonta were represented primarily by isolated teeth and bits of jawbones, with most of these specimens found across former Laurasia (modern-day North America, Europe, and Asia), and some from Gondwana (modern-day India and Southern Hemisphere). However, recent discoveries in China have included some exceptionally well preserved almost complete body fossils Docodonts are traditionally thought to have been primarily ground dwelling and insectivorous, but Castorocauda and Haldanodon were specialised for an aquatic lifestyle and had recurved molars, which suggests possible fish or aquatic invertebrate diet. It was thought likely that many docodonts had tendencies towards aquatic habits, given their presence in wetland environments. However, recent discoveries such as the specialised digging species Docofossor, and specialised tree-dweller Agilodocodon suggest Docodonta is more ecologically diverse than previously suspected. Docofossor shows many of the same physical traits as the modern day golden mole, such as wide, shortened digits in the hands for digging.

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