Reproductive Structures from the Upper Triassic of Middle-Western Gondwana

GOMEZ, MARIA ANGELICA; TOMAS PEDERNERA

Encuentro; 1° Reunión Virtual de Comunicaciones de la Asociación Paleontológica Argentina; 2021

Asociacion Palentologica Argentina

The paleofloras from the upper Triassic of Argentina are mostly known based on vegetative elements. However, during the last decade, several contributions have studied Triassic reproductive structures. Here, we provide new information about reproductive structures recovered from two Triassic units from the central-west of Argentina: the Agua de la zorra Formation (Cuyana Basin) and the Los Rastros Formation (ischigualasto-Villa unión Basin). in both units, the plant fossilrecord is diverse and corresponds to the Dicroidium Flora. in the Agua de la zorra Formation, the ovules/seed recorded were assigned to Cordaicarpus, while cupulate female strobilus were assigned to Matatiella sp. (Matatiellaceae) and Rissikiostrobus sp. (Podocarpaceae). on the other hand, ovules/seeds registered in the Los Rastros Formation were assigned to the generaCordaicarpus and Samaropsis, while several other specimens were identified as morphotype 1. A single? female strobilus specimen was assigned to Umkomasia (umkomasiaceae). The study of the morphological features of reproductive structures can be a useful tool to understand paleobiological and paleoecological features of Triassic plants.