Tezoatlan Composite: Bajocian, Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Pelourdia sp.
Mexiglossa varia
Polypodiopsida
Cladophlebis browniana (Dunker 1846)
Polypodiopsida - Equisetales - Equisetaceae
Equisetum rajmahalensis (Oldham and Morris 1863)
recombined as Equisetum rajmahalense
Polypodiopsida - Gleicheniales - Matoniaceae
Piazopteris branneri (White 1913)
original and current combination Alethopteris branneri
Polypodiopsida - Cyatheales - Cyatheaceae
Coniopteris arguta
cf. Coniopteris hymenophylloides (Brongniart 1828)
original and current combination Sphenopteris hymenophylloides
Sphenopteridae
Sphenopteris goeppertii
Pinopsida - Cordaitanthales
Noeggerathiopsis hislopii (Bunbury 1878)
recombined as Cordaites hislopi
Bennettitales
Otozamites hespera
Cycadolepis mexicana
Ptilophyllum sp. Morris 1840
cf. Ptilophyllum acutifolium Morris 1840
Pterophyllum spinosum n. sp.
Pterophyllum sp. Brongniart 1828
Anomozamites sp. Schimper 1870
Zamites oaxacensis
Zamites tribulosus
Zamites lucerensis
Zamites diquiyui
Williamsonia netzahualcoyotlii
Williamsonia huitizilipochtlii
Williamsonia oaxacensis
Williamsonia diquiyui
Equisetopsida - Araucariaceae
Araucarioxylon mexicana
Cycadopsida - Cycadales - Nilssoniaceae
cf. Pseudoctenis sp. Seward 1911
Cycadopsida - Cycadales
Taeniopteris oaxacensis n. sp.
unclassified
Perezlaria oaxacensis Delevoryas and Gould 1971
see common names

Geography
Country:Mexico State/province:Oaxaca
Coordinates: 17.6° North, 97.8° West (view map)
Paleocoordinates:9.1° North, 47.8° West
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Bajocian 10 m.y. bin:Jurassic 4
*Period:Middle Jurassic
Key time interval:Bajocian
Age range of interval:170.90000 - 168.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Tecocoyunco Formation:Zorrillo
Stratigraphic resolution:formation
Lithology and environment
Primary lithology: silty,carbonaceous sandstone
Secondary lithology: coal
Includes fossils?Y
Includes fossils?Y
Lithology description: low grade metamorphism
Taphonomy
Modes of preservation:adpression,permineralized
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Metadata
Also known as:Zorrillo Middle Jurassic
Database number:25087
Authorizer:A. Rees Enterer:D. Sunderlin
Modifier:D. Sunderlin Research group:paleobotany
Created:2002-08-28 08:32:59 Last modified:2002-08-28 11:33:01
Access level:the public Released:2002-08-28 08:32:59
Creative Commons license:CC BY
Reference information

Primary reference:
7041.PGAP C. P. Person and T. Delevoryas. 1982. The Middle Jurassic flora of Oaxaca, Mexico. Palaeontographica Abteilung B 180:82-119 [A. Rees/D. Sunderlin/J. Alroy]