| T O P I C R E V I E W |
| Gontran |
Posted - 15/12/2017 : 16:49:58
338.68 KB
From Perak, rather small specimen,26 mm.
Thestus species? |
| 11 L A T E S T R E P L I E S (Newest First) |
| Gontran |
Posted - 17/12/2017 : 16:47:56
Dan, it's OK with oncideroides, philippensis and alexandra but my chassoti are probably alexandra (with lateral spines on pronotum), also from Malaysia.
Thanks again. |
| Gontran |
Posted - 17/12/2017 : 15:19:58
Thank you Dan. I will manage with that key. |
| dryobius |
Posted - 16/12/2017 : 23:05:37
This key to Thestus is from an unpublished manuscript from Hudepohl based on Breuning's key.
I haven't had time to study it. And I am not familiar with Thestus chassoti.
The key does not mention the fringe on the antennae.
1 Pronotum with small tubercle instead of lateral spine 2
- Lateral spine of pronotum long and acute 3
2 Lower eye lobes distinctly longer than genae; elytra apically rounded. Thestus oncideroides
- Lower eye lobes two and a half times as long as genae; sutural angle of elytron acute, slightly prominent. Thestus chassoti Breuning
3 Sutural angle of elytron forming lobe. Thestus alexandrae
- That angle not forming lobe. Thestus philippensis |
| Gontran |
Posted - 16/12/2017 : 16:05:22
476.32 KB
Please, again. These from Malaysia are also T. alexandra.
Right? |
| Gontran |
Posted - 16/12/2017 : 15:52:06
472.54 KB
Thanks to all of you. Now, to make sure for the corrections, if the one at left is Thestus oncideroides, then at right should be T. alexandra from Sumatra, Mt. Dempo.
Even if antennae are slightly hairy underneath?. |
| Capitaine |
Posted - 16/12/2017 : 10:45:39
Thanks Dan and Xavier for these precisions, I take this opportunity to correct the label of my ex.(hairy) |
| Xavier |
Posted - 15/12/2017 : 23:30:17
Indeed ! Well done, Dan.
Here the original drawing of Thestus oncideroides Pascoe, 1866. |
| Gontran |
Posted - 15/12/2017 : 22:42:32
Thank you Dan. I will look more closely at that. |
| dryobius |
Posted - 15/12/2017 : 21:55:30
I believe this is Thestus oncideroides Pascoe, 1866.
Note the hairy fringe on the antennae. Both male and female of T. oncideroides have this feature. T. oncideroides is much smaller than T. alexandra.
T. alexandra does not possess an antenna with visible fringe of hair.
Lastly, both species occur in Borneo and West Malaysia.
|
| Gontran |
Posted - 15/12/2017 : 19:27:14
Merci Claude. |
| Capitaine |
Posted - 15/12/2017 : 17:09:20
I've a specimen very close labeled: Thestus alexandrae, in fact Thestus alexandra (Thomson, 1878) for Titan. This one should be a female. |
