Portugal in America
نویسندگان
چکیده
منابع مشابه
Former diversity of Ephedra (Gnetales): evidence from Early Cretaceous seeds from Portugal and North America.
BACKGROUND AND AIMS The extant species of the seed plant group Gnetales (Ephedra, Gnetum and Welwitschia) have been considered a remnant of a much greater, now extinct, diversity due to the pronounced differences in form and ecology among the genera. Until recently, this hypothesis has not been supported by evidence from the fossil record. This paper adds to the expanding information on Gnetale...
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ژورنال
عنوان ژورنال: Hispanic American Historical Review
سال: 1937
ISSN: 0018-2168,1527-1900
DOI: 10.1215/00182168-17.2.182