Cualac Middle Jurassic (Jurassic to of Mexico)

Where: Guerrero, Mexico (17.8° N, 98.6° W: paleocoordinates 9.0° N, 48.1° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Conglomerado Cualac Formation (Tecocoyunca Group), Middle Aalenian to Middle Aalenian (175.6 - 168.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: coastal; lithified conglomerate

• plants collected in the interstratigraphic limestones

Size class: macrofossils

Preservation: mold/impression

Collection methods: surface (float), surface (in situ), mechanical,

Primary reference: A. Silva-Pineda and S. Gonzalez-Gallardo. 1988. Algunas Bennettitales (Cycadophyta) y Coniferales (Coniferophyta) del Jurasico Medio del area de Cualac, Guerrero. Universidad Nacional Autonoma de Mexico, Instituto de Geologia Revista 7(2):244-248 [A. Rees/D. Sunderlin/D. Sunderlin]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 25086: authorized by Allister Rees, entered by Dave Sunderlin on 28.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
 Bennettitales -
Otozamites hespera, Zamites sp., Ptilophyllum sp., cf. Ptilophyllum acutifolium
Zamites sp. Brongniart 1828
Ptilophyllum sp. Morris 1840
Equisetopsida
 Pinidae - Pinidae
Brachyphyllum sp.
Brachyphyllum sp. Brongniart 1828