The inner branch of a biramous leg. Most, or all appendages can be derived from a biramous leg, which consists of a peduncle of two or three segments, carrying two appendages, the endopod and the exopod. In the thoracic appendages of the lobsters, the exopod has disappeared or is present as a reduced flagellum-bearing organ, while the distal five segments of the pereiopods represent the endopod. In most pleopods and in the uropod the biramous construction of the appendage is still clearly apparent, and here the exo- and the endopod can be of about the same size. Opposite term: exopod.

Alternative forms for endopod : endopodite, endopods.