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dpotanin
Member since Dec-22-05
187 posts |
Mar-24-06, 12:36 PM (PST) |
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"Chinese Cetoniinae ID"
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LAST EDITED ON Mar-24-06 AT 12:44 PM (PST)
Please help to ID these Cetoniinae from China (LaoYan, Hubei province, China).1. Rhomborrhina? sp. 1 26-28 mm.
 2. Trigonophorus ? sp. 1
 3. Trigonophorus ? sp. 2
 4. Potosia? sp. 1 (23-24 mm)
 5. Potosia? sp. 2 (23-24 mm)
 6. Rhomborrhina? sp. 2 (25-26 mm)
 Best regards,
Denis |
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bgarthe
Member since May-8-03
1148 posts |
Mar-30-06, 08:33 PM (PST) |
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2. "RE: Chinese Cetoniinae ID"
In response to message #0
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I took both my collection specimens and used the book "Cetoniinae Beetles of the World" by Sakai & Nagai to try to identify these. Also, the Protaetia genus is one of the toughest to do. None of my idents. are 100% and I would encourage you to find another to confirm or refute. Lastly, some of the ones I used in the book were listed as China, but ranges of some nearby beetles go into China. This "overlapping" can make certain ident. a nightmare. Having the actual specimens would be better than photos because there are dozens, if not 100s of Protaetia that look much alike. Additional photos of the Trigonophorus and Protaetias might help. Getting the leg color, head details, and better lighting on the elytra might help. Your photos are very good, but any additional views would help. 1. I feel is a Torynorrhina fulvopilosa from (plt.67, #739). 2. Looks like Trigonphorus rothschildi (plt.70, #763). 3. Much the same as 2.----remember this genus/sp. is very variable. 4.& 5. These two look to be Protaetia genus. I'd tend to think species is orientalis (plt94, #1036), but could be brevitarsus (plt93, #1026), or cathaica (plt.93, #1028). 6. ? Maybe it is Pseudotorynorrhina japonica (plt.68, #746-6). I'll be watching to see if any other posts come along to verify or not. These are gorgeous beetles Bill G. |
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dpotanin
Member since Dec-22-05
187 posts |
Mar-30-06, 10:58 PM (PST) |
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3. "RE: Chinese Cetoniinae ID"
In response to message #2
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LAST EDITED ON Mar-30-06 AT 11:07 PM (PST)
Thank you, Bill!I also have this book ("Cetoniinae Beetles of the World" by Sakai & Nagai), and trying to identify these beetles (Trigonophorus and Rhomborrhina-like species) - nightmare, I agree About Trigonophorus sp. Specimen on pic. 2 has an rectangular "horn" and 2 spikes on protibia, and specimen on pic. 3 - triangle "horn" and without spikes on protibia. May it be a sexual dimorphism?
I know, that there is monography of Miksic (Miksic, R. Monographie der Cetoniinae der palaarktischen und orientalischen Region, 2: 1-400, 15 pls., Sarajevo, 1977.) where is a key for all known species of this genera, but I can`t get it 
Best regards,
Denis |
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bgarthe
Member since May-8-03
1148 posts |
Mar-31-06, 05:52 AM (PST) |
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4. "RE: Chinese Cetoniinae ID"
In response to message #3
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One of the reasons for my request for more pics was just for what you mentioned. I 'thought' I saw those horns/protrusions, but I wasn't sure. As far as sexual-dimorphism is concerned, maybe. I'd have to look into it. The trainaglar horn you mentioned also is enhanced or reduced depending on the angle of the photograph. These horns can greatly help in IDing them, but the image would have to best match that of what one is using to ID it. Also, remember that I used both the image and the general location cited by S&N to narrow down possibilities. Some other images really looked pretty close to yours. Since you have the S&N book, check out what I said and see what you think. The variations/locations/subsp galore of Protaetia make me feel 'dumb' with that genus. There are simply SO many possibilities. Bill G. |
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bgarthe
Member since May-8-03
1148 posts |
Apr-02-06, 06:30 PM (PST) |
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6. "RE: Chinese Cetoniinae ID"
In response to message #5
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Denis, W O W !!! You did 'slightly' enlarge the image. I was hoping you'd do a bit better------jk. As I see them, the T. rothschildi are 1. female and 2. male. The little horn clearly shows up and idents the sexes. These also appear to be T. rothschildi. The Protaetia are surely P. orientalis-------look at the three-dot (triangular) pattern on the pronotums common to virtually all the forms of this beetle. The pronotum just jumps out at me saying orientalis. The elytra patterning is also indicative of P. orientalis, although some others have some similar designs. Again------------when you enlarge, you ENLARGE My collection specimens confirm what I see in the book. What is your take on these? Surely you have an opinion here worth noting. Anyone bothering to own that book would (with some examination) form an opinion. Take care, Bill p.s. My hypothesis on the Protaetia is #3. is male and #4. is female. Bill G. |
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