Morphometric and molecular characterization of an unpigmented haemosporidian parasite in the Neotropical turnip-tailed gecko ().

Morphological traits from blood stages have been the gold standard for determining haemosporidian parasite species. However, the status of some taxa and the value of such traits in parasites from reptiles remain contentious. The scarce sampling of these species worsens the situation, and several taxa lack molecular data. A survey was performed in the Magdalena Department in Colombia, where 16 species of reptiles were captured. A peculiar haemosporidian parasite was found in the Turnip-tailed gecko . This haemosporidian does not show malarial pigment in blood stages under light microscopy; thus, it fits the genus's characters belonging to the . However, the phylogenetic analyses using a partial sequence of and the mitochondrial DNA placed it within the clade. Our findings suggest that many putative species belong to the genus , like the one reported here. This study either shows that visible malarial pigment in blood stages is not a diagnostic trait of the genus or malarial pigment might be present in an undetectable form under a light microscope. In any case, the current taxonomy of haemosporidian parasites in reptiles requires revision. This study highlights the importance of using molecular and morphological traits to address taxonomic questions at the species and genus levels in haemosporidian parasites from reptiles.