Early Oligocene Calocedrus (Cupressaceae) from the Maoming Basin, South China, and its paleogeographic and paleoclimatic implications
Early Oligocene Calocedrus (Cupressaceae) from the Maoming Basin, South China, and its paleogeographic and paleoclimatic implications
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华南茂名盆地早渐新世柏科植物及其古地理和古气候意义
DOI：
10.1111/jse.12424
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发表时间：
2019
影响因子：
3.7
通讯作者：
Liu X. Y.
中科院分区：
文献类型：
--
作者：
Wu Y.;Jin J. H.;Li N.;He H. M.;Chen T.;Liu X. Y.
Calocedrus Kurz属的特征是扁平的枝条，上面覆盖着交叉的和二形的叶子。本文描述了中国南部茂名盆地上村组(早渐新世)发现的钙化石叶化石。这些化石具有楔形的小枝节段和鳞片状的强烈二形叶，与化石物种Calocedus lantenoisi(Laurent)Tao相似。目前还没有关于FC的形态特征和角质层结构的详细研究。兰特诺伊斯。因此，一个新修订的种的诊断C。在对茂名化石的叶片形态和角质层特征进行详细研究的基础上，给出了羊肚菌。这是世界上最早的Calocedrus化石记录之一，为该属的早期生物地理历史提供了额外的证据，并支持东亚Calocedruus是所有现存物种中的原始物种的推断。石鸡现存物种主要分布在山区。在“近亲”分析的基础上，提出了茂名盆地在渐新世早期毗邻山区的观点。
The genusCalocedrusKurz is characterized by flattened branches covered with decussate and dimorphic leaves. In this study, we describe fossil foliage ofCalocedrusdiscovered in the Shangcun Formation (early Oligocene) of the Maoming Basin, South China. The fossils have wedge‐shaped branchlet segments and scale‐like strongly dimorphic leaves, similar to the fossil speciesCalocedrus lantenoisi(Laurent) Tao. There have been no detailed studies of the morphological features and cuticle structures ofC. lantenoisi. Therefore, a newly emended diagnosis of the speciesC. lantenoisiis given based on a detailed study of leaf morphology and cuticular characters exhibited by the Maoming fossils. This is one of the earliest fossil records ofCalocedrusin the world, providing additional evidence for the early biogeographic history of this genus and supporting the inference that eastern AsianCalocedrusis primitive among all the living species. The extant species ofCalocedrusare mainly distributed in mountainous regions. On the basis of the “nearest living relative” analysis, we propose that the Maoming Basin was adjacent to a mountainous region during the early Oligocene.