Huayacocotla and Zacualpan (Jurassic to of Mexico)

Where: Veracruz, Mexico (21.2° N, 98.3° W: paleocoordinates 8.8° N, 46.4° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Huayacocotla Formation, Early/Lower Jurassic to Early/Lower Jurassic (201.3 - 163.5 Ma)

• Transition between Totolap and Divisadero Formations

• formation-level stratigraphic resolution

Environment/lithology:

Size class: macrofossils

Collection methods: Some original characterization of this flora is in Imlay et al., 1948, p. 1750; Diaz-Lozano (1916)

Primary reference: A. Silva-Pineda. 1978. Paleobotanica del Jurasico de Mexico. Universidad Nacional Autonoma de Mexico. Instituto de Geologia, Paleontologia Mexicana 44:1-16 [A. Rees/D. Sunderlin/D. Sunderlin]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24736: authorized by Allister Rees, entered by Dave Sunderlin on 19.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Equisetopsida
 Pinidae - Pinidae
"? Cheirolepis sp." = Hirmeriella
"? Cheirolepis sp." = Hirmeriella Hörhammer 1933
Sphenopteridae
  - Sphenopteridae
Sphenopteris sp. Sternberg 1825
Polypodiopsida
 Gleicheniales - Polypodiidae
? Piazopteris sp. Lorch 1969
Cycadopsida
 Cycadales - Cycadaceae
Sphenozamites sp. Brongniart 1849 cycads
 Coniferales - Podocarpaceae
Podozamites sp. Braun 1843 podocarp
 Bennettitales -