BRYOPHYTE ASSOCIATION FROM THE LA CANTERA FORMATION, LATE APTIAN, SAN LUIS BASIN, ARGENTINA

作者：Puebla Gabriela G^*; Mego Natalia; Pramparo Mercedes B

来源：Ameghiniana, 2012, 49(2): 217-229.

DOI：10.5710/AMGH.v49i2(504)

• Bryophytes
• La Camera Formation
• Late Aptian
• San Luis
• Argentina

BRYOPHYTE ASSOCIATION FROM THE LA CANTERA FORMATION, LATE APTIAN, SAN LUIS BASIN, ARGENTINA. The La Cantera Formation (Early Cretaceous) has yielded an important palynoflora associated to a diverse macroflora; both recovered from rocks exposed at its type locality in the Sierra del Gigante, San Luis Basin, central-western Argentina. Spores of the genera Aequitriradites (Delcourt and Sprumont) emend. Cookson and Dettmann and Couperisporites Pocock are described and illustrated together with diverse plant morphotypes recovered from the same fossiliferous levels and belonging to Bryophyta, albeit not in organic connection. This new analysis of the fossil plant association (disperse spores and macroscopic remains) reveals a dominance of spores and megaflora with hepatic affinity within the bryophytes. The occurrence of spores and macroremains of hepaticae and mosses in the same sediments suggests the in situ development of this group of plants (there is no evidence of transport). They grew in this part of the San Luis Basin during the Aptian under local wet conditions related to a fresh water body.

• 出版日期2012-6