speri
New Member
Posts: 10
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Post by speri on Apr 5, 2011 12:16:13 GMT -8
Hi, I'm having problems sexing sternocera, any help would be much appreciated thankyou.
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Post by prillbug2 on Apr 5, 2011 19:04:19 GMT -8
Size and antennae length; females smaller, shorter antennae. Plus the emargination of the fifth abdominal segment--ie. emarginate or so forth.
Jeff Prill.
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speri
New Member
Posts: 10
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Post by speri on Apr 6, 2011 11:06:19 GMT -8
Thanks for your help. The first four differences I'm o.k on, however the fifth segment differences,I really am struggling with. I am trying to sex, pulchra and hildebrandti. Could these possibly require a different method? Thanks again.
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Post by prillbug2 on Apr 6, 2011 19:27:12 GMT -8
Another way is to place the specimen in alcohol and soften it completely, then pull it out and open the last segment, then try to push out either the penis or the aedegus, or pull it out gingerly with a pair of micro tweezers. these are the sixth and seventh segments. Actually, the antennae are not really a means of sexing the adults, I erred and apologize for that. Are these living specimens, I have to ask, because if you're trying to breed them, you'll need to have them alive. Just asking.
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speri
New Member
Posts: 10
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Post by speri on Apr 6, 2011 23:21:06 GMT -8
Thankyou again (prillbug2). This method sounds more definite. I'll have to source some alcohol. They are dead specimens. I have a quantity of pulchra and hildebrandti, plus other species which I am trying to pair..I'll update when I try the alcohol and tweezers. many thanks.
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Post by prillbug2 on Apr 7, 2011 7:23:20 GMT -8
Actually, I was tired after coming home from work. The males should be smaller and the females should be a little larger. In fact, I was so tired that I fell asleep in my chair after I logged off. Sorry.
Jeff Prill
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Post by longhorn on Apr 7, 2011 14:47:19 GMT -8
either the penis or the aedegusquote] Jeff, I thought aedeagus is male`s copulation organ = same thing as pennis or am I wrong ? |
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Post by africaone on Apr 8, 2011 3:03:33 GMT -8
i don't know if it can be used for Sternocera but in Chrysaspina (the only genus i collectin buprestid) the late sternite is a small rounded plate that differ m / f.
the penultimate sternite can be used inside a species but as it varies from a species to another the result can't be sure (if you are not sure about the species identity).
otherwise I use the same technic of opening the tip of the abdomen (and in case of male, to extract the male genitalia, easy to do on relaxed or fresh specimen).
Thierry
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Post by prillbug2 on Apr 8, 2011 7:17:23 GMT -8
Just put a and/or there. Like I said I was tired that night after working 16 hours.
Jeff Prill
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speri
New Member
Posts: 10
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Post by speri on Apr 8, 2011 8:41:00 GMT -8
Thanks Jeff, & 'africaone', for your expertise. I have tried extracting the genitalia but these specimens are as hard as 'bullets'. Maybe hot water will do the trick? we'll see. Enjoy your weekend Jeff,... put your feet up.
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