Morphology, anatomy, phylogenetics and distribution of fossil and extant Trochodendraceae in the Northern Hemisphere

Author:

Manchester Steven R1,Kvaček Zlatko2,Judd Walter S3

Affiliation:

1. Florida Museum of Natural History, University of Florida, Gainesville FL, USA

2. Charles University, Faculty of Science, Albertov, Praha, Czech Republic

3. Department of Biology, 220 Bartram Hall, University of Florida, Gainesville FL, USA

Abstract

Abstract We present the oldest known occurrences of crown-group Trochodendraceae based on new material from the Palaeocene of Wyoming, USA. Two genera are recognized, Trochodendron and Eotrochion gen. nov. The fossil fruit of Trochodendron infernense sp. nov. is represented by a pedicellate, apically dehiscent capsular fruit composed of nine follicle-like units, each bearing a persistent convex style. The basal part is ornamented with numerous raised stamen scars. From the same deposits, Eotrochion is represented by infructescences, fruits and associated leaves. The infructescences are racemes of numerous apically dehiscent capsules, each with c. 14–16 styles, each with an underlying nectary and receptacles lacking stamen scars, but possessing a prominent perianth scar. A phylogenetic assessment of the modern species, plus representatives of four extinct genera of fossil Trochodendraceae based on available morphological characters, yields a favoured topology of Trochodendron(Eotrochion(Concavistylon kvacekii(C. wehrii (Pentacentron, Tetracentron)))). A parsimony analysis of currently available characters indicates that C. wehrii renders Concavistylon non-monophyletic. Accordingly, we transfer it to Paraconcavistylon gen. nov., characterized by pendent, rather than erect infructescences. We also reconsider the extinct Nordenskioeldia (Late Cretaceous to Miocene), the prior placement of which in Trochodendraceae has been challenged, and we consider it to fall outside the crown group of the family.

Funder

National Science Foundation

Publisher

Oxford University Press (OUP)

Subject

Plant Science,Ecology, Evolution, Behavior and Systematics

Reference42 articles.

1. Morphology and relationships of Trochodendron and Tetracentron. I. Stem, root, and leaf;Bailey;Journal of the Arnold Arboretum,1945

2. Systematic anatomy of the leaf epidermis in the Magnoliaceae and some related families;Baranova;Taxon,1972

3. On the laterocytic stomatotype in angiosperms;Baranova;Brittonia,1983

4. Entwicklungsgeschichte und Bau der Spaltöffnungen bei den Gattungen Trochodendron Sieb. et Zucc., Tetracentron Oliv. und Drimys J. R. et G. Forst;Bondeson;Acta Horti Bergiani,1954

5. The genus Trochodendron (Trochodendraceae) in Miocene of Kamchatka;Chelebaeva;Botanicheskii Zhurnal,1988

Cited by 5 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3