A Map of Colombia showing the known localities of the species of Caecilia that occur in the Magdalena valley region. Key: C. caribea (blue triangle), C. corpulenta (black dot), C. degenerata (black cross), C. guntheri (violet asterisk), C. subnigricans (yellow triangle), C. subdermalis (green star), C. thompsoni (black star), Caecilia pulchraserrana sp. nov. (red triangle) B Type locality of Caecilia pulchraserrana sp. nov. (red triangle) at Serranía de los Yariguíes, Santander Department, Colombia.