| Palynological analysis of the Chigua and Malimán formations of Devonian and Early Carboniferous age respectively, cropping out in the Río Blanco Basin, northwestern Argentina, has yielded diverse paleomicroplankton-spore assemblages. In this first part, 35 species of paleomicroplankton and 68 species of acavate spores from both formations are illustrated. Two new species are proposed: Apiculiretusispora laxa from the Devonian, and Pustulatisporites malimanensis from the Early Carboniferous. Two new combinations are proposed: the spore species Apiculatisporis castanea (Butterworth and Williams) nov. comb., and the paleomicroplankton species, Dictyotidium munificum (Wicander and Wood) nov. comb., based on the discussion of the main characters of the genera... |
