Systematics and Palaeoecology of Three New Acrocarpous Mosses from the Mid-Cretaceous of Kachin, Myanmar

文献类型： 外文期刊

第一作者： Tan, Zhen-Zhen

作者： Tan, Zhen-Zhen;Cui, Yi-Ming;Saing, Lwin Mar;Li, Chun-Xiang;Li, Ya

作者机构：

关键词： Calymperites; Ditrichites; Calymperaceae; Dicranales; Mesozoic; moss fossils

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2025 年 14 卷 14 期

页码：

收录情况： SCI

摘要： The mid-Cretaceous Kachin amber deposit from northern Myanmar is currently a promising locality for reconstructing Cretaceous bryophyte floras. However, the vast majority of bryophyte fossils reported from Kachin amber are epiphytic leafy liverworts of Porellales and pleurocarpous mosses of Hypnodendrales, while acrocarpous mosses are rarely discovered. In addition, terrestrial-to-lithophytic bryophytes have never been reported from Kachin amber. In this study, we describe three new species of acrocarpous mosses, Calymperites proboscideus sp. nov., Calymperites chenianus sp. nov., and Ditrichites aristatus sp. nov. (Dicranales s.l.), based on 34 whole plants and 11 fragments embedded in 13 pieces of Kachin amber. Calymperites chenianus is an epiphytic species based on the connection to a bark fragment, while the other two species are the first terrestrial-to-lithophytic bryophytes from Kachin amber, based on the attachment of rhizoids to soil or rock. Calymperites chenianus and Calymperites proboscideus probably represent stem group members of Calymperaceae. Ditrichites aristatus is likely a member of Ditrichaceae or Dicranaceae. These new findings provide compelling evidence for palaeoecological habitat reconstruction of acrocarpous mosses and significantly expand our understanding of the species diversity of bryophyte communities in the Cretaceous amber forest of Myanmar.

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