asiletto Posted November 10, 2014 Report Share Posted November 10, 2014 I got some Xylotrupes sp. females from north-eastern Thailand. Anyone can give me help on identifying them and/or have some keys for identifying the various Xylotrupes species? I have also a picture of the males but quite blurry. thanks! Quote Link to comment Share on other sites More sharing options...
AlexW Posted November 11, 2014 Report Share Posted November 11, 2014 According to Orin's Invertebrates for Exhibition, the species living in Thailand is X. mniszechi, but I'm identifying based only on location, not characteristics. Perhaps some other people can help you further? Quote Link to comment Share on other sites More sharing options...
asiletto Posted November 11, 2014 Author Report Share Posted November 11, 2014 Thanks for the hint! I was trying too to identify the specimen by the location, but.. Endrodi in an 1985 book says in Thailand there is the subspecies Xylotrupes gideon tonkinensis. On the internet I found species names as Xylotrupes gideon siamensis or even Xylotrupes siamensis. Quote Link to comment Share on other sites More sharing options...
airbugs Posted November 11, 2014 Report Share Posted November 11, 2014 It is X. siamensis according to Rowland 2011: http://journals.fcla.edu/mundi/article/view/76247 (Full text is free). There is only on species found in that Area (Indo-China). However, there are two male forms, one with male horn dimorphism (those that have both long horn and short horn types; siamensis type) while the other one short and strong horn type for major male (tonkinensis type). Silvestre (2003) "The Xylotrupes beetles from continental Asia" has some illustrations about the horn shape and genital morphology for Xylotrupes species from this region. But in Silvestre 2003 X. siamensis (siamensis types) is recognized as X. socrates socrates, individuals collected from ChiangMai or Chiang Rai Thailand all the way west to India; whereas the eastern tonkinensis type (samples collected from Vietnam, Laos, and Southern China that do not have long horned males) is recognized as X. socrates tonkinensis. All these things have very similar genital morphology (they are all from the same species), but very different horn shape for big males. Your collections from N.E. Thailand should be very close to those from Laos and thus should be X. siamensis/X. socrates tonkinensis or even X. gideon tonkinensis (used by many insect dealer). Quote Link to comment Share on other sites More sharing options...
asiletto Posted November 12, 2014 Author Report Share Posted November 12, 2014 thanks, really useful! Quote Link to comment Share on other sites More sharing options...
asiletto Posted December 27, 2014 Author Report Share Posted December 27, 2014 These females are laying a lot of eggs. I am curious to see how will be the shape of the horns of the future males. Here's a couple of videos. Xylotrupes siamensis (from Chiang Mai) Xylotrupes socrates female eating Quote Link to comment Share on other sites More sharing options...
Ratmosphere Posted January 24, 2015 Report Share Posted January 24, 2015 Awesome species! Quote Link to comment Share on other sites More sharing options...
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