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INVESTIGATIONS OF NORTH AMERICAN CYCADEOIDS: WELTRICHIA AND WILLIAMSONIA FROM THE JURASSIC OF OAXACA, MEXICO
Author(s) -
Delevoryas T.
Publication year - 1991
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1991.tb15744.x
Subject(s) - biology , paleontology , archaeology , geography
Specimens of cones of members of the family Williamsoniaceae, order Cycadeoidales, from Jurassic deposits of Oaxaca, Mexico, demonstrate the first bona fide evidence of the pollenbearing Weltrichia from the Mexican Jurassic as well as provide new information on ovulebearing Williamsonia .