Nuevas especies de palinomorfos de las formaciones San José y Chiquimil (Mioceno medio y superior), Noroeste de Argentina

Abstract

In this contribution are described taxonomically six new species of pollen of magnoliophytes from the San José and Chiquimil formations (middle and upper Miocene), Northwest of Argentina, as follow: Spinitricolpites anzoteguii sp. nov. and Periporopollenites vivianae sp. nov. (both Cactaceae), Retitetracolpites columelae sp. nov. (Nyctaginaceae), Areolipollis pirenii sp. nov. and A. insularis sp. nov. (both Acanthaceae) and Chenopodipollis minima sp. nov. (Amaranthaceae). The modern genus Trichocereus (A. Berger) Riccob., Echinopsis Zucc. and Opuntia Mill. (Cactaceae), Boungainvillea Comm. ex Juss. (Nyctaginaceae) and Justicia L. (Acanthaceae) are mentioned for the first time for the Paleocene-Pliocene interval in Argentina. The new species are included in paleocommunities that they would have integrated. © 2011 by the Sociedade Brasileira de Paleontologia.