Three new species of the genus Lophoturus Brolemann, 1931, L. judsoni n. sp. from Tobago, L. monserratensis n. sp. and L. sturmi n. sp. from Colombia, are described. L. judsoni n. sp. is characterized by the unusual orientation of the sensilla basiconica of antennal article VI and L. monserratensis n. sp. by the ornamentation of its labrum. L. sturmi n. sp. is close to L. adisi Ishii, Nguyen Duy-Jacquemin & Condé, 1999 but differs in the form of the sensilla of antennal article VI. The variability of the species L. longisetis (Pocock, 1894) is corroborated by the new collection from Guadeloupe; the two females from Trinidad show, by the disappearance of the third sensillum basiconicum on the antennal article VI, a more advanced evolutionary stage towards a reduction of the sensilla number. The large Caribbean and Central America distribution of the genus Lophoturus and the species Ancistroxenus comans (Loomis, 1934) is corroborated. Larvae of Macroxenodes aff. amazonicus Ishii, Nguyen Duy-Jacquemin & Condé, 1999 are recorded from Tobago.
Myriapoda, Diplopoda, Polyxenida, Caribbean islands, northern South America, polymorphism, distribution, new species.