Bauhcis moranii gen. et sp nov (Cercideae, Caesalpinieae), an Oligocene plant from Tepexi de Rodriguez, Puebla, Mex., with leaf architecture similar to Bauhinia and Cercis
Bauhcis moranii gen. et sp nov (Cercideae, Caesalpinieae), an Oligocene plant from Tepexi de Rodriguez, Puebla, Mex., with leaf architecture similar to Bauhinia and Cercis
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DOI：
10.1016/s0034-6667(02)00135-5
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发表时间：
2002-11-01
影响因子：
1.9
通讯作者：
Cevallos-Ferriz, SRS
中科院分区：
文献类型：
--
作者：
Calvillo-Canadell, L;Cevallos-Ferriz, SRS
墨西哥普埃布拉的渐新世 Coatzingo 地层（近似于 Pie de Vaca 地层）产生了多种植物组合，其中豆科植物以木材、果实和叶子或小叶为代表。两个标本的叶子印痕具有在现存的 Cercideae (Caesalpinieae) 成员中发现的特征。通过表型分析证实了形态学观察结果，表明化石和现存植物之间的形态差异对应于部落内的自然变异。尽管该化石材料与紫荆花和紫荆花非常相似，但其特征集支持对新分类群 Bauhcis moranii Calvillo-Canadell 和 Cevallos-Ferriz 的识别。分支分析进一步支持该化石代表了该部落历史上的一个时刻，早于现存两个属的分化。这种新植物增加了墨西哥中部鲜为人知的低纬度植被化石，并强化了漫长而复杂的植物地理学历史的概念，以解释该地区现存的生物多样性，其中豆科植物是植物区系中最重要的组成部分之一。 (C) 2002 Elsevier Science B.V. 保留所有权利。
The Oligocene Coatzingo Formation (approximate toPie de Vaca Formation), Puebla, Mexico, has yielded a diverse assemblage of plants among which Leguminosae are represented by wood, fruits and leaves or leaflets. Leaf impressions from two specimens have characteristics found in extant members of Cercideae (Caesalpinieae). Morphological observations were corroborated through a phenetic analysis suggesting that morphological differences between the fossil and extant plants correspond to natural variation within the tribe. Although the fossil material closely resembles both Bauhinia and Cercis, its set of characters support the recognition of a new taxon, Bauhcis moranii Calvillo-Canadell and Cevallos-Ferriz. The cladistic analysis further supports that the fossil represents a moment in the history of the tribe, previous to the differentiation of the two extant genera. This new plant adds to the poorly known low-latitude fossil vegetation of Central Mexico and strengthens the idea of a long and complex phytogeography history to explain the extant biodiversity of the area, in which Leguminosae is among the most important component of the flora. (C) 2002 Elsevier Science B.V. All rights reserved.