The Unknown Diversity Of The Genuscharacidium(Characiformes: Crenuchidae) In The Choco Biogeographic Region, Colombian Andes: Two New Species Supported By Morphological And Molecular Data

Two new species ofCharacidium,C. tatamaandC. dule, are described from the biogeographic Choco region in western Colombia. Both new species are supported by both morphological and molecular data.C. tatamafrom the San Juan River in the Pacific andC. dulefrom the Atrato River in the Caribbean portion of Colombia are both distributed in the upper and lower portions of these basins. An extensive comparison with other trans- and cis-Andean species ofCharacidiumwas made, in addition to species delimitation, using COI sequences by distinct methods (GMYC, ABGD, bPTP).