Li Yan-Da, Clarke Dave J, Newton Alfred F, Huang Di-Ying, Cai Chen-Yang
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China.
Bristol Palaeobiology Group, School of Earth Sciences University of Bristol Bristol UK.
Ecol Evol. 2025 Sep 7;15(9):e71960. doi: 10.1002/ece3.71960. eCollection 2025 Sep.
We describe and illustrate gen. et sp. nov., a fossil beetle of Euaesthetinae (Staphylinidae) from mid-Cretaceous Kachin amber, and evaluate its phylogenetic placement based on morphological characters. shares several key features with the generic group, including a distinct metendosternal stalk, two pairs of parasclerites on abdominal segments IV-VI, and apically attached abdominal intersegmental membranes. It differs from the two extant genera of the generic group, and , primarily by having only a very weak and indistinct dorsal nuchal depression. The discovery of adds to the limited but growing fossil record of Euaesthetinae and provides new insight into the early diversification of this group.
我们描述并图示了一种来自白垩纪中期克钦琥珀的真美学萤叶甲亚科（隐翅虫科）化石甲虫新属新种，并基于形态特征评估了其系统发育位置。它与该类群共有几个关键特征，包括明显的后胸内茎柄、腹部第四至六节上的两对副骨片以及顶端附着的腹部节间膜。它与该类群的两个现存属，即[属名1]和[属名2]的主要区别在于，其背侧颈部凹陷非常微弱且不明显。[新属新种名称]的发现增加了真美学萤叶甲亚科有限但不断增长的化石记录，并为该类群的早期多样化提供了新的见解。
