La flora Triásica de la Quebrada Doña Inés Chica, Región de Atacama, Chile.

A megafl ora preserved by impressions in three distinct levels from the Quebrada del Salitre Formation, Upper Triassic, from the locality Quebrada de Doña Inés Chica (26° 07' S - 69° 20' W), 3rd Region, Chile, is described. The taphofl ora is composed by Neocalamites sp. cf. N. carrerei Halle, Cladophlebis cf. mesozoica Kurtz ex Frenguelli, Dictyophyllum (D.) tenuifolium (Stipanicic & Menéndez) Bonetti & Herbst, Gleichenites cachivaritensis Herbst, Dicroidium odontopteroides (Morris) Gothan, Dicroidium lancifolium (Morris) Gothan, Pterophyllum sp. a, Pterophyllum sp. b, Sphenobaiera cf. steinmannii (Solms-Laubach) Anderson & Anderson, Sphenobaiera. cf. schenckii (Feistmantel) Florin, Linguifolium gracile Anderson & Anderson, Linguifolium tenison-woodsii (Jack & Etheridge) Retallack, Heidiphyllum cf. elongatum (Morris) Retallack, cf. Rochipteris sp., Matatiella suarezii nov. sp., Umkomasia sp. and an undetermined fructifi cation. The fructifi cations Matatiella and ?Switzianthus are recorded for the fi rst time in the Triassic of Chile. A paleoenvironmental analysis, based on foliar characters and preservation of the fossils, together with sedimentological data, allows proposing a subtropical seasonal, meso- to xeromorphic climate and the existence of several paleocommunities for the Upper Triassic in the Atacama region and the deposition of Quebrada del Salitre Formation. [ABSTRACT FROM AUTHOR]