title: A new species of Leydigia Kurz, 1875 (Cladocera: Chydoridae) from Colombia.
abstract: A new species of Leydigia Kurz, 1875 (Cladocera: Chydoridae) is described based on the material from Ciénaga Grande de Santa Marta, Magdalena Department, Colombia. L. lourdesae sp. nov. is a member of the subgenus Leydigia (Neoleydigia) Kotov, 2009, having all diagnostic characters of the latter. It could be the closest relative to L. iberica Kotov & Alonso, 2010, having five setae on exopodite III, a unique for the genus character. But new taxon differs from the latter in a series of characters of the head pores, armature of valve ventral margin, postabdomen, antenna I and II, and limbs I-III. We believe that the basal taxa of L. (Neoleydigia) (including L. lourdesae sp. nov.) are remains of an antique pan-continental group, probably of Mesozoic age, partly survived after the mass extinction and represented now by a series of locally distributed taxa in very distant localities of the planet.
authors.affiliation: A. N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow 119071, Russia.; Email: alexey-a-kotov@yandex.ru.
authors.forename: Alexey A
authors.initials: AA
authors.lastname: Kotov
authors.affiliation: Universidad del Magdalena, Grupo de investigación en Limnología Neotropical, A.A 731 Santa Marta, Magdalena, Colombia.; Email: juanmanuelfuentesreines@yahoo.com.
authors.forename: Juan Manuel
authors.initials: JM
authors.lastname: Fuentes-Reinés
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology; D000818:Animals; D033361:Cladocera / Q000033:anatomy & histology / Q000145:classification*; D003105:Colombia; D017753:Ecosystem; D005260:Female; D008297:Male