Plant Megafossils

petrified wood

Petrified wood may not have bark, limbs, roots, or leaves, but it often has distinctive characteristics that help scientists identify it.

NPS/MARGE POST

Late Triassic plant megafossils found in Petrified Forest National Park
Compiled by Dr. Sid Ash, September 2003

* species based on fossils collected in the park
** species and genotype based on fossils collected in the park

Lycopods
Chinlea campii**
Chinlea
sp.

Horsetails
Equisetites bradyi*
Equisetites
spp.
Equicalastrobus chinleana**
Neocalamites virginiensis
Neocalamites
sp.

Ferns and Fernlike Foliage
Cladophlebis daughertyi*
C. yazzia*
Cladophlebis
spp.
Clathropteris walkeri*
Cynepteris lasiophora*
Itopsidema vancleaveii**
Phlebopteris smithii*
Sphenopteris arizonica*
Todites fragilis*
Wingatea plumosa**


Cycads
Aricycas paulae**
Charmorgia dijolli**
Lyssoxylon grigsbyi**


Cycadeoids
Zamites powellii

Ginkgoes
Baiera arizonica*

Cordaites
Dadoxylon chaneyi*

Conifers
Araucariorhiza joae**
Araucarioxylon arizonicum
Brachyphyllum hegewaldia*
Pagiophyllum simpsonii*
Podozamites arizonicus*
Samaropsis puerca*

Position Uncertain
Carpolithus chinleana*
Dinophyton spinosus**
Marcouia neuropteroides**
Pramelreuthia yazzi*
Schilderia adamanica**
Woodworthia arizonica**

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