Number: 166 / Family: Gomphidae / Genus: Onychogomphus
Species: Onychogomphus louissiriusi / Common name(s):N/A
Habitat: Forested rocky stream
Province(s) sighted: Pratchup Khirikhan
In flight: May / Sightings (by me): Rare
Species easily confused with: N/A
Species: Onychogomphus louissiriusi / Common name(s):N/A
Habitat: Forested rocky stream
Province(s) sighted: Pratchup Khirikhan
In flight: May / Sightings (by me): Rare
Species easily confused with: N/A
As I made my way up Pa La-U Waterfall, a medium-sized Gomphid plonked down right in front of me. I managed to position myself and get some decent photos. However, as I tried to capture it, the thing flew off at great speed. I didn't get another chance to photograph or capture any further specimens. I wasn't sure what it was, but thought it was of the genus, Onychogomphus. This was confirmed by Kroolek Reinthong, following me posting it on Facebook.
Recently, it was described as Onychogomphus louissiriusi. I love it when I can name them!
The Male
A typical-looking meduim-sized male, but with enormous appendages. I think they could be used to grab teddy bears in those silly arcade games.

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Hi Dennis, this species looks a lot like Ophiogomphus sinicus from southern China and now also verified for Vietnam. You would need close-up of appendages to be sure, of course. This species also was originally included in Onychogomphus. See my blog.
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