内蒙古宁城道虎沟地区首次发现东方古蝉后翅并修订属征

发布时间：2021年12月30日

2021年澳大利亚古生物学杂志（Alcheringa: An Australasian Journal of Palaeontology）在线发表了一件来自我国内蒙古宁城道虎沟地区的古蝉科昆虫化石研究成果，该研究工作获得北京市科学技术研究院“北科青年学者”项目（No.YS201902）资助，由国家自然博物馆研究人员牵头，与天津自然博物馆、首都师范大学及美国国家自然历史博物馆的研究人员共同合作完成。

文章研究了产自内蒙古道虎沟地区中侏罗世九龙山组的一件具有完整前后翅东方古蝉标本。

古蝉为大型昆虫，在古蝉科的研究历史中，很少有标本保存完整的身体结构及前后翅。东方古蝉属（Eoiocossus）于2006年根据前翅建立，其后，根据新发现的前翅标本描述建立多个新种。本文首次发现东方古蝉标本前翅和后翅的标本，该件标本为对板，清晰保存前翅和后翅的特征，依据此件标本，本文修订东方古蝉属的属征，并对此前该属内各种进行逐一修订，同时编订东方古蝉属检索表。

Revision of Eoiocossus (Insecta, Hemiptera, Palaeontinidae) from the Middle Jurassic of Northeastern China

Ying Wang1, Junhui Liang2, Chungkun Shih3，4, and Dong Ren3

1 Beijing Museum of Natural History, 126 Tianqiao South St, Dongcheng District, Beijing, 100050, PR China;

2 Tianjin Natural History Museum, 31 Youyi Road, Hexi District, Tianjin, 300201, PR China;

3 College of Life Sciences and Academy for Multidisciplinary Studies, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing, 100048, PR China; 4 Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013, USA.

ABSTRACT

The diagnosis of the genus Eoiocossus is emended based on new material of Eoiocossus conchatus comb. nov. from an outcrop of the Middle Jurassic Jiulongshan Formation at Daohugou Village in Ningcheng County, Inner Mongolia, China. This new material, with its complete fore- and hind wing, provides previously unknown hind wing characters for the genus Eoiocossus. In the hind wing, vein M is bifurcated into M1+2 and M3+4 basally; M1+2 branches soon after arising from M; M3+4 branched with stem of M3+4 long. A key and emended diagnosis is provided for Eoiocossus based on this new material.

Figure 1. Eoiocossus conchatus: A, photograph of part, BMNHC-PI006439a; B, photograph of counterpart, BMNHC-PI006439b. Scale bars = 10 mm.