Two new earthworm species (Oligochaeta: Annelida) of the Orinoquia region of Colombia.

Two new earthworm species from grassland and herbaceous plant formations in the departments of Arauca y Casanare (Orinoquian region of Colombia) are described, Righiodrilus cusiani sp. nov. (Glossoscolecidae) and Andiodrilus cravijae sp.

Two new earthworm species (Oligochaeta: Annelida) of the Caribbean region of Colombia.

Two new earthworm species are described, Periscolex malibu sp. nov. (Rhinodrilidae) and Righiodrilus lebrijae sp.