INVESTIGATIONS OF ANGIOSPERMS FROM THE EOCENE OF NORTH-AMERICA - A NEW GENUS OF THEACEAE BASED ON FRUIT AND SEED REMAINS
INVESTIGATIONS OF ANGIOSPERMS FROM THE EOCENE OF NORTH-AMERICA - A NEW GENUS OF THEACEAE BASED ON FRUIT AND SEED REMAINS
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DOI：
10.1086/337764
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发表时间：
1989-06-01
影响因子：
--
通讯作者：
DILCHER, DL
中科院分区：
文献类型：
--
作者：
GROTE, PJ;DILCHER, DL
本文根据果实和种子的残留物描述了产于北美洲东南部始新世中期的山茶科一新属--ANDREWSIOCARPON。Andrewsiocarpon是一个室背开裂的五瓣蒴果，有宿存的覆瓦状萼片，一个大的中央柱，和五个两种子的室。化石属的详细形态和解剖学分析以及与许多现存属的果实和种子的比较提供了证据，允许将其放入山茶科的山茶亚科，但不属于任何现代属。Andrewsiocarpon与该亚科的几个现代属共享特征，但似乎与Franklinia最相似。对山茶科化石记录的回顾表明，山茶亚科和厚皮香亚科在始新世就已确立。
A new genus of Theaceae, ANDREWSIOCARPON, from the Middle Eocene of southeastern North America, is described based on fruit and seed remains. Andrewsiocarpon is a loculicidally dehiscent five-valved capsule with persistent imbricate sepals, a large central columella, and five two-seeded locules. Detailed morphological and anatomical analyses of the fossil genus and comparison with fruits and seeds of many extant genera provide evidence that allows placement into the subfamily Camellioideae of the Theaceae but not within any modern genus. Andrewsiocarpon shares characters with several modern genera in this subfamily, but appears most similar to Franklinia. A review of the fossil Theaceae record indicates that the subfamilies Camellioideae and Ternstroemioideae were well established by the Eocene.