And while at dusk at a bridge in the park, all of a sudden 15 or so large Aeshnids started swarming under it. At first I thought these might be the recently described Planaeschna guenterpetersi and who read this entry in its first version will have seen the species tentatively identified as Planaeschna sp. But in fact appendages and coloration are quite different. A day spent in the books led to the conclusion that this was in fact Boyeria karubei, a species described by Yokoi in 2002 for Laos. A first record of this genus in Vietnam. I will explain a little more on its ID in a new entry.
All suggestions on the Lamelligomphus are welcome!
|Lamelligomphus sp., male|
|Compare shape of tip of appendages with the enigma Lamelligomphus|
|Note lack of teeth on the inside of he superiors and no extension of the inferiors away from the superiors|
|This is weird, collar and dorsal stripes connected|
|Facial pattern with split yellow line over frons|
|Comparison with previous enigma, note differences in appendages|
|Penile organ of present specimen, divergent|
|Enigma specimen, very different|
|Scan of the Boyeria karubei, male|
|Boyeria karubei, male, note brownish face, but also extensive singular markings on the abdominal segments and all green eyes|
|S10 and appendages in lateral view|
|In dorsal view, not concave shape of epiproct|
|And the same in ventral view|
|A very reddish-brown face indeed|