La paleoflora triásica de la Formación Los Rastros, provincia de San Juan, Argentina

LUTZ, A., A. MANCUSO; S. GNAEDINGER, A. CRISAFULLI

AMEGHINIANA

Asociación Paleontológica Argentina

Año: 2008

0002-7014

Abstract. THE TRIASSIC PALEOFLORA TRIÁSICA FROM LOS RASTROS FORMATION, SAN JUAN PROVINCE, ARGENTINA.  The impression paleoflora from Los Rastros  Formation, San Juan province, Argentina, of  Middle-Late Triassic age is described. The following taxa are present: Cladophlebis mendozaensis (Geinitz) Frenguelli, Dicroidium argenteum (Retallack) Gnaedinger, Dicroidium crassum (Menéndez) Petriella, Dicroidium dubium (Feistmantel) Gothan, Dicroidium lancifolium (Morris) Gothan, Dicroidium lineatum (Tenison-Woods) Holmes and Anderson, Dicroidium nondichotoma Anderson and Anderson, Dicroidium obtusifolium (Johnston) Townrow, Dicroidium odontopteroides (Morris) Gothan, Johnstonia dutoitii (Townrow) Retallack, Johnstonia stelzneriana (Geinitz) Frenguelli, Xylopteris argentina (Kurtz) Frenguelli emend. Stipanicic and Bonetti, Xylopteris densifolia (Du Toit) Frenguelli, Xylopteris rigida (Dun) Jain and Delevoryas, Zuberia sahnii (Seward) Frenguelli, Zuberia zuberi (Szajnocha) Frenguelli, Pachydermophyllum praecordillerae (Frenguelli) Retallack Baiera africana Baldoni, Baiera pontifolia (Anderson y Anderson) Lutz et al. nov. comb., Baiera schenkii Feistmantel, Sphenobaiera argentinae (Kurtz) Frenguelli, Sphenobaiera insecta Anderson and Anderson, Sphenobaiera sectina Anderson and Anderson, Heidiphylum elongatum (Morris) Retallack, Rissikia media (Tensión-Woods) Townrow, and Pteridophylla (hojas incertae sedis): Dejerseya lunensis (Johnston) Anderson y Anderson, Dejerseya cf. Dejerseya lobata (Jones y de Jersey) Herbst, Kurtziana cacheutensis (Kurtz) Frenguelli 1942, emend. Petriella and Arrondo, Rochipteris cf. R. alexandriana Herbst et al. and Yabeiella brackebuschiana Oishi. This association allows some taxonomic and taphonomic considerations while differences between stratigraphic levels are remarked.