Palynology of the Chigua (Devonian) and Malimán (Carboniferous) formations in the Del Volcán Range, San Juan Province, Argentina. Part II. Cavate, pseudosaccate and cingulizonate spores

CECILIA R. AMENÁBAR, MERCEDES DI PASQUO, HUGO A. CARRIZO, CARLOS L. AZCUY

AMEGHINIANA

Asociación Paleontológica Argentina

Lugar: Ciudad Autónoma de Buenos Aires; Año: 2007 vol. 44 p. 547 - 564

0002-7014

Palynological analysis of the Chigua and Malimán formations of Devonian and Early Carboniferous age respectively, cropping out in the Del Volcán Range, Río Blanco Basin, western Argentina, is presented. In this second part, 40 indigenous species of cavate, pseudosaccate and cingulizonate spores from both formations are illustrated. The species Geminospora sp. cf. G. tuberculata var. tuberculata McGregor is recorded in the Devonian of South America for the first time. The following species are also recorded in the Lower Carboniferous of South America for the first time, Crassispora invicta Playford, Densosporites asperus Braman and Hills, Densosporites gracilis Smith and Butterworth, Densosporites secundus Playford and Satterthwait, Densosporites sp. cf. D. triangularis Kosanke, Gorgonispora sp. cf. G. crassa (Winslow) Higgs, Clayton and Keegan, Lophozonotriletes dentatus Hughes and Playford, Spelaeotriletes echinatus (Hacquebard) Utting, Velamisporites perinatus (Hughes and Playford) Playford. Some possibly reworked species (scolecodonts, paleomicroplankton and spores) from Malimán Formation are also illustrated and some of them described.