Description of the final instar larva of Cephalaeschna risi Asahina, 1981 with notes on its semi-terrestrial lifestyle (Odonata: Aeshnidae)

  • Written by Fang-Shuo HU, Tsung-Wei CHAN, Lung-Chun HUANG, I-Lung LEE
  • International Journal of Odonatology
  • volume: 24 (2021)
  • Description Article
  • PDF
  • 139–148 pp.
  • Release date: 2021-07-08
  • doi: 10.23797/2159-6719_24_10

Keywords. dragonfly, Anisoptera, taxonomy, key, bionomics, Taiwan

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International Journal of Odonatology 24 (2021)

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The final instar larva of Cephalaeschna risi Asahina, 1981 is described for the first time based on material from Taiwan. In Taiwan, the larva of C. risi can be separated from other aeshnid larvae by its relatively short antennae and presence of small protuberances on the legs. Diagnostic characters to distinguish it from other known larvae of Cephalaeschna are also discussed. A comprehensive description, detailed illustrations, bionomics and observations of the semi-terrestrial lifestyle of C. risi are presented. Finally, a key to the genera of Aeshnidae in Taiwan is proposed.

Fang-Shuo HU

Department of Entomology, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City 402, Taiwan.

ORCID: 0000-0003-1269-8904

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Tsung-Wei CHAN

Gaoyi Elementary School, No. 28, Gaoyi, Fuxing Dist., Taoyuan City 336, Taiwan.


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Lung-Chun HUANG

Conservation and Research Center, Taipei Zoo No. 30, Sec. 2, Xinguang Rd., Taipei City, Taiwan.

ORCID: 0000-0003-3277-6893



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I-Lung LEE

Taipei Wego Private Senior High School, NO. 50, Zhuhai Rd., Beitou Dist., Taipei City, Taiwan.


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