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Issue: Vol. 7 No. 2: April 2024
Type: Article
Published: 2024-04-19
DOI: 10.11646/palaeoentomology.7.2.7
Page range: 237-244
Abstract views: 149
PDF downloaded: 2

The oldest aktassiid dragonfly (Odonata: Petaluroidea) from the Middle Jurassic of China

School of Life Sciences, Key Laboratory of Conservation and Application in Biodiversity of South China, Guangzhou University, Guangzhou 510006, China; College of Life Sciences and Academy for Multidisciplinary Studies, Capital Normal University, Beijing 100048, China
School of Life Sciences, Key Laboratory of Conservation and Application in Biodiversity of South China, Guangzhou University, Guangzhou 510006, China
School of Earth Sciences and Engineering, Guangdong Provincial Key Lab of Geological Processes and Mineral Resources, Sun Yat-sen University, Guangzhou 510275, China
College of Life Sciences and Academy for Multidisciplinary Studies, Capital Normal University, Beijing 100048, China
School of Life Sciences, Key Laboratory of Conservation and Application in Biodiversity of South China, Guangzhou University, Guangzhou 510006, China
Odonata Petaluroidea Aktassiidae Aktassiinae Mesozoic fossil China

Abstract

A new genus and species of true dragonfly Hongtaous caii gen. et sp. nov. is described from the Middle Jurassic of Inner Mongolia, China. It is assigned to the family Aktasiidae based on the following: large and broad wings; narrow postnodal area with many cells distal of elongated pterostigma; very long and straight IR1; and widened area between RP1 and RP2, which is the oldest member of this family to date. Hongtaous caii sp. nov. differs from other genera by the configuration of wing venation such as: two rows of cells between RA and RP1 at level of Pt, and extending to the end of the wing; an elongated IR1, not distally vanishing; discoidal triangle and subdiscoidal triangle divided into multiple cells by transverse veins; presence of Rspl. In addition, its special cerci are simply discussed.

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