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Combretaceous fossil wood from Ituzaingó Formation (Late Miocene?), Argentina, indicate a coastal marine environment
Review of Palaeobotany and Palynology ( IF 1.9 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.revpalbo.2020.104270
Eliana Moya , Mariana Brea

Abstract A new anatomical study of the fossil material assigned to Menendoxylon areniensis Lutz 1979 (family Fabaceae) was performed. In this study, new wood anatomical characteristics were observed. These are diagnostic characters present in the family, Combretaceae. Also, its presence suggests an adaptation to environmental variability: numerous vessels (mean 14–52 vessels/mm2), small vessel diameter (mean 26–103 μm), and low vessel height (mean 76–329 μm). The fossil is closest to the genera, Conocarpus and Laguncularia, with anatomical characteristics that are particularly similar to those of Conocarpus erectus. Conocarpus erectus is a species associated with mangroves and is classified as pseudo-mangrove or peripheral species. Mangroveoxylon areniensis gen. et comb. nov., recovered in the Late Miocene? of Ituzaingo Formation is the first record of fossil wood that indicates a coastal marine environment, which is further south of the tropics. This could resemble a tropical environment with species developing at different levels of the land.

中文翻译:

来自阿根廷 Ituzaingó 组(晚中新世?)的碎屑化石表明沿海海洋环境

摘要 对属于 Menendoxylon areniensis Lutz 1979(豆科)的化石材料进行了新的解剖学研究。在这项研究中,观察到了新的木材解剖特征。这些是存在于 Combretaceae 科中的诊断特征。此外,它的存在表明对环境变化的适应:众多血管(平均 14-52 个血管/mm2)、小血管直径(平均 26-103 μm)和低血管高度(平均 76-329 μm)。该化石与 Conocarpus 和 Laguncularia 属最接近,其解剖特征与 Conocarpus直立人的解剖特征特别相似。Conocarpus standus 是一种与红树林有关的物种,被归类为伪红树林或外围物种。Mangroveoxylon areniensis gen. 等梳。十一月,在晚中新世恢复?Ituzaingo 组的化石是第一个表明沿海海洋环境的化石记录,该环境位于热带以南。这可能类似于热带环境,物种在土地的不同层面发展。
更新日期:2020-10-01
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