New Jurassic notocupedins (Coleoptera: Archostemata: Ommatidae) from the Qinghai-Xizang (Tibetan) Plateau

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Palaeoworld Pub Date : 2024-09-21 DOI:10.1016/j.palwor.2024.09.002

Zhen-Yu Song , Edmund A. Jarzembowski , Chuan-Tao Xiao , Ai-Ying Yang

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Abstract

Beetles belonging to the extinct tribe Notocupedini (Archostemata: Ommatidae) are widespread in Mesozoic deposits. Two new Early Jurassic species in the first reported Mesozoic insect assemblage from the Qinghai-Xizang (Tibetan) Plateau are proposed in the genus/collective group Zygadenia. Zygadenia dachaidanensis n. sp. can be distinguished from other congeners based on a combination of small size, oval head, large eyes, absence of longitudinal suture on metasternum, slightly narrowed elytron below humerus, maculated round window cells, and sub-rectangular scutellum; Zygadenia haixiensis n. sp. can be distinguished from other congeners based on a combination of elongated head, uniquely contracted ventrite 5, metasternum with longitudinal suture and elytron without prominent longitudinal veins. The two species represent the first record of Archostemata from the Qinghai-Xizang Plateau, extending the palaeogeographical distribution of Archostemata, and are important an aid to the reconstruction of the Early Jurassic swamp ecosystem in the Qinghai-Xizang Plateau.

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青藏高原新侏罗世无翅目（鞘翅目：足形目：小蛾科）

在中生代的沉积物中广泛分布着已灭绝的甲虫族。在首次报道的青藏高原中生代昆虫组合中，提出了两个早侏罗世的新物种，属于Zygadenia属/集体群。根据以下特征可与其他同属动物区分：体型小，头卵圆形，眼大，胸骨上无纵缝，肱骨以下鞘翅略狭窄，斑状圆窗细胞和近矩形盾；根据其头部拉长、独特收缩的腔体5、有纵缝的胸骨和没有明显纵脉的鞘翅的组合，可以将海西棘棘与其他同系物区分开来。这两个物种代表了青藏高原最早记录的始肢动物，扩展了始肢动物的古地理分布，为青藏高原早侏罗世沼泽生态系统的重建提供了重要的帮助。

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来源期刊

Palaeoworld PALEONTOLOGY-

CiteScore

4.00

自引率

5.90%

发文量

期刊介绍： Palaeoworld is a peer-reviewed quarterly journal dedicated to the study of past life and its environment. We encourage submission of original manuscripts on all aspects of palaeontology and stratigraphy, comparisons of regional and global data in time and space, and results generated by interdisciplinary investigations in related fields. Some issues will be devoted entirely to a special theme whereas others will be composed of contributed articles. Palaeoworld is dedicated to serving a broad spectrum of geoscientists and palaeobiologists as well as serving as a resource for students in fields as diverse as palaeobiology, evolutionary biology, taxonomy and phylogeny, geobiology, historical geology, and palaeoenvironment. Palaeoworld publishes original articles in the following areas: •Phylogeny and taxonomic studies of all fossil groups •Biostratigraphy, chemostratigraphy, chronostratigraphy •Palaeoecology, palaeoenvironment and global changes throughout Earth history •Tempo and mode of biological evolution •Biological events in Earth history (e.g., extinctions, radiations) •Ecosystem evolution •Geobiology and molecular palaeobiology •Palaeontological and stratigraphic methods •Interdisciplinary studies focusing on fossils and strata