Abstract Detail

Paleobotany

Morales-Toledo, Jeronimo [1], Cevallos-Ferriz, Sergio [2].

Unravelling the Middle Jurassic Flora from Otlaltepec Formation in Puebla, Mexico. Highlights and porspects.

The Middle Jurassic Floras from Mexico have been studied since the beginning of the 20th century in the Oaxaca state. Recent findings of well-preserved plant fossils in the Otlaltepec Formation are reshaping the knowledge of the past plant communities that lived during this time in Mexico. In order to contribute to the knowledge of the plant diversity of Mexican Middle Jurassic Floras, fossil material was collected from a new locality (Santo Domingo Tianguistengo Locality). Different plant groups such as horsetails, ferns, ginkgoes and conifers were identified and described. Of these, Bennettitales were the most abundant group. The similarity of the locality was compared with other Jurassic floras from Mexico and worldwide to determine the fitness of this flora within the Equatorial Region. Surprisingly, the SDT Locality was more similar to high-latitude floras than to other Middle Jurassic tropical floras, including those from Mexico. The presence of ginkgoes and conifers could reshape the Equatorial Regionalization that so far lacked such groups. The presence of these groups can be explained by local environmental conditions that were established during the Middle Jurassic rift of Pangea in México.

1 - University Of Michigan, Earth And Environmental Sciences , 321 East Ann Street, Apt 2, Ann Arbor, MI, 48104, United States
2 - Instituto De Geología, UANM, Department Of Palentology, Lluvia Jardines Del Pedregal Alvaro Obregon, Coyoacan, Mexico D.f., DIF, 01900, Mexico

Keywords:
Paleobotany
Middle Jurassic
Flora.

Presentation Type: Oral Paper
Session: PL1, Paleobotany: Cookson Student Presentations - Session I
Location: /
Date: Monday, July 19th, 2021
Time: 10:30 AM(EDT)
Number: PL1003
Abstract ID:954
Candidate for Awards:Isabel Cookson Award,Maynard F. Moseley Award