Abstract
The larva of Amphigomphus somnuki Hämäläinen, 1996 is described for the first time based on an emerged male specimen from Chiang Mai Province, and several F-0 larvae collected in other provinces of Thailand. The larva of A. somnuki is the smallest and differs from A. nakamurai Karube, 2001 by the caudal appendages densely covered with minute spiniform setae, and from A. hansoni Chao, 1954 by the male epiproct with the dorsal tubercles at 0.65 the length of the epiproct. New province records for A. somnuki and the first records of Stylogomphus Fraser, 1922 for Thailand are provided.
References
Corbet, P.S. (1953) A terminology for the labium of larval Odonata. The Entomologist, 86, 191−196.
Hämäläinen, M. (1996) Amphigomphus somnuki n. sp. from North Thailand (Odonata: Gomphidae). Entomologisch Zeitschrift, 106 (5), 177–180.
Hämäläinen, M. & Pinratana, B.A. (1999) Atlas of the dragonflies of Thailand. Distribution maps by provinces. Brothers of Saint Gabriel in Thailand, Bangkok, 176 pp.
Hämäläinen, M. & Pinratana, B.A. (2000) Additions and corrections to dragonfly lists of five protected areas in Thailand. Malangpo, 17, 156−157.
Paulson, D.R. (2009) Dragonflies and damselflies of the West. Princeton University Press, Princeton, New Jersey, 536 pp.
https://doi.org/10.1515/9781400832941
Sasamoto, A. & Kawashima, I. (2007) Description of the last instar larva of Amphigomphus nakamurai Karube, 2001 (Anisoptera, Gomphidae, Onychogomphinae) from northern Vietnam, Indo-China. Tombo, Matsumoto, 49 (1/4), 5−9.
Shorthouse, D.P. (2010) SimpleMappr, an online tool to produce publication-quality point maps. Available from: http://www.simplemappr.net (accessed 26 October 2018)
Watson, M.C. (1956) The utilization of mandibular armature in taxonomic studies of anisopterous nymphs. Transactions of the American Entomological Society, 81, 155−205.
Xu, Q.-H. (2012) Description of the last instar larva of Amphigomphus hansoni Chao, with notes on the systematic status of the genus Amphigomphus Chao (Anisoptera: Gomphidae). Odonatologica, 41 (1), 55−59.