作者
Brian J Axsmith, Bonnie Fine Jacobs
发表日期
2005/3
期刊
International Journal of Plant Sciences
卷号
166
期号
2
页码范围
327-337
出版商
The University of Chicago Press
简介
Until now, our knowledge of the Lower Cretaceous conifer Frenelopsis ramosissima was based exclusively on branches from a few sites in the Potomac Group of eastern Virginia and Maryland. Affinities with the important Mesozoic family Cheirolepidiaceae have been assumed despite the historical absence of diagnostic attached or associated Classopollis‐producing pollen cones. This plant has been reconstructed as a small, stem‐succulent shrub that inhabited diverse, mesic plant communities. Here, we present a reconsideration of F. ramosissima based on new fossils from the Jones Ranch sauropod dinosaur quarry site (Twin Mountains Formation) near Glen Rose, Texas, which represents a ca. 2100‐km range extension for this conifer. Compelling support for assignment to the Cheirolepidiaceae is provided by the first account of associated pollen cones with in situ Classopollis‐type pollen. Features of …
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