Identification of beetles (Coleoptera)

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25.09.2018 13:33, KorvinBF08

New elephants from the food of several small passerine birds (robin Erithacus rubecula and finch Fringilla coelebs). August 08.08.17 and 18.08.17 respectively.
All from one place: Minsk, Makaenka street 8, almost a park area, arboretum (among woody plants of pear, apple, birch, juniper, thuja).

Photos 1-5-elephant from podsem. Entiminae with lateral antennal grooves. The size of the head is 1.5 mm, the width of the bases of the hips is 1 mm, the length of the thighs and shins is approximately 1 mm. I would venture to assume that this is Sciaphilus aspertatus.

Photos 6-7 - head of a small elephant measuring 0.8-0.9 mm, podem. Entiminae, the antennal furrow goes all the way to the eye. I don't know who it is yet.

Photos 8-13 - still small elephants, the size of the heads is also 0.8-0.9 mm, without scales, poorly visible, but the antennal grooves do not reach the eye; prsp. size ≈ 0.8 x 0.8 mm; also not very clearly visible, but ndc. brown (as, for example, in Barypeithes), the width of the bases of the ndcr. 1 mm, hip length 0.7 mm. I would venture to assume that this Barypeithes is (on the ndkr. no scales, but they might have broken off.)

I will post the second part of the elephants from this place separately.

Ilya, please give me a consultation. If you can't identify any elephants, just write this.

This post was edited by KorvinBF08-25.09.2018 16: 14

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25.09.2018 17:29, Mantispid

New elephants from the food of several small passerine birds (robin Erithacus rubecula and finch Fringilla coelebs). August 08.08.17 and 18.08.17 respectively.
All from one place: Minsk, Makaenka street 8, almost a park area, arboretum (among woody plants of pear, apple, birch, juniper, thuja).

Photos 1-5-elephant from podsem. Entiminae with lateral antennal grooves. The size of the head is 1.5 mm, the width of the bases of the hips is 1 mm, the length of the thighs and shins is approximately 1 mm. I would venture to assume that this is Sciaphilus aspertatus.

Photos 6-7 - head of a small elephant measuring 0.8-0.9 mm, podem. Entiminae, the antennal furrow goes all the way to the eye. I don't know who it is yet.

Photos 8-13 - still small elephants, the size of the heads is also 0.8-0.9 mm, without scales, poorly visible, but the antennal grooves do not reach the eye; prsp. size ≈ 0.8 x 0.8 mm; also not very clearly visible, but ndc. brown (as, for example, in Barypeithes), the width of the bases of the ndcr. 1 mm, hip length 0.7 mm. I would venture to assume that this Barypeithes is (on the ndkr. no scales, but they might have broken off.)

I will post the second part of the elephants from this place separately.
Ilya, please give me a consultation. If you can't identify any elephants, just write this.

Photos 1-3 - legs and elytra, it is difficult to understand whose.
On 4-5-yes, I agree, the head of Sciaphilus
aspertatus On 6-7-I think this is the head of Romualdius scaber, I don't know who else can have such characteristic whiskers. grooves, for 100% confidence you can clean and look at the very top of the head tube-Trachyphloeini has a characteristic epistomal platform with protruding teeth. Here on this site http://alittlenaturalhistory.blogspot.com/2015/04/
the image below shows a very clearly visible platform with protruding teeth.
8-13 - I also agree, only they are now called Exomias. True, for E. pellucidus, the dotted line is rather rough (especially on the pronotum, is this the pronotum side view?). It may also be Exomias trichopterus.

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25.09.2018 20:50, KorvinBF08

Photos 1-3 - legs and elytra, it is difficult to understand whose.
On 4-5-yes, I agree, the head of Sciaphilus
aspertatus On 6-7-I think this is the head of Romualdius scaber, I don't know who else can have such characteristic whiskers. grooves, for 100% confidence you can clean and look at the very top of the head tube-Trachyphloeini has a characteristic epistomal platform with protruding teeth. Here on this site http://alittlenaturalhistory.blogspot.com/2015/04/
the image below shows a very clearly visible platform with protruding teeth.
8-13 - I also agree, only they are now called Exomias. True, for E. pellucidus, the dotted line is rather rough (especially on the pronotum, is this the pronotum side view?). It may also be Exomias trichopterus.

Ilya, once again thank you very much. Your help is simply invaluable!!!

Photos 1-3 - legs and elytra, it is difficult to understand whose-You know, from experience such black elytra are found in the material together with the heads of Phyllobius, Strophosoma, now with Sciaphilus. Apparently, this is what the elytra of these elephants are without scales. The scales are most likely in the process of passing through the skin. the tract of birds and, especially, in the process of grinding and grinding food in the stomach simply disappear. Although there's a good chance I'm wrong.

Trachyphloeini has a characteristic epistomal platform with protruding teeth - unfortunately, no matter how hard I tried, I could not find these teeth on the epistomal platform, although the latter was clearly visible. I do not exclude that they could also fall off from the head. I still don't understand how you were able to identify it as a Romualdius scaber. Why Romualdius and not other genera in Trachyphloeini?

True, for E. pellucidus, the dotted line is rather rough (especially on the pronotum, is this the pronotum side view?) - yes, it was a kind of top and side view. And yes, you are absolutely right, judging by the dotted line on the prsp. this is indeed Exomias trichopterus. True, it is not included in the list of the country's fauna (meaning the Catalog of Coleoptera of Belarus, Alexandrovich, Lopatin...), but this catalog was published a long time ago, already in 1996, then there were reports that about 135 more species joined the list of weevils of Belarus, but I did not see this updated list anywhere. On the other hand, if it is present in most of Europe, then we should have it too.

25.09.2018 21:19, Mantispid

Ilya, once again thank you very much. Your help is simply invaluable!!!

Photos 1-3 - legs and elytra, it is difficult to understand whose-You know, from experience such black elytra are found in the material together with the heads of Phyllobius, Strophosoma, now with Sciaphilus. Apparently, this is what the elytra of these elephants are without scales. The scales are most likely in the process of passing through the skin. the tract of birds and, especially, in the process of grinding and grinding food in the stomach simply disappear. Although there's a good chance I'm wrong.

Trachyphloeini has a characteristic epistomal platform with protruding teeth - unfortunately, no matter how hard I tried, I could not find these teeth on the epistomal platform, although the latter was clearly visible. I do not exclude that they could also fall off from the head. I still don't understand how you were able to identify it as a Romualdius scaber. Why Romualdius and not other genera in Trachyphloeini?

True, for E. pellucidus, the dotted line is rather rough (especially on the pronotum, is this the pronotum side view?) - yes, it was a kind of top and side view. And yes, you are absolutely right, judging by the dotted line on the prsp. this is indeed Exomias trichopterus. True, it is not included in the list of the country's fauna (meaning the Catalog of Coleoptera of Belarus, Alexandrovich, Lopatin...), but this catalog was published a long time ago, already in 1996, then there were reports that about 135 more species joined the list of weevils of Belarus, but I did not see this updated list anywhere. On the other hand, if it exists in most of Europe, then we should have it too.

As for the elytra-it is clear that they are without scales, so it is difficult to say something about them, the definition of weevils is mainly based on the color, shape and location of the scales.

About Romualdius scaber-look at the pictures on the link that I threw off, it just shows the location of the grooves in different Trachyphloeini, and this is also the most common type of tribe in the forest zone, although there is also a twin species R. angustisetulus that is close to it. But this is unlikely.

As for E. trichopterus, it should definitely be in Belarus. Can be left in question or until roda

25.09.2018 21:32, KorvinBF08

As for the elytra-it is clear that they are without scales, so it is difficult to say something about them, the definition of weevils is mainly based on the color, shape and location of the scales.

About Romualdius scaber-look at the pictures on the link that I threw off, it just shows the location of the grooves in different Trachyphloeini, and this is also the most common type of tribe in the forest zone, although there is also a twin species R. angustisetulus that is close to it. But this is unlikely.

As for E. trichopterus, it should definitely be in Belarus. Can be left in question or up to sort

Pictures of Trachyphloeini will definitely be studied, but this elephant is not from the forest, but from the very center of the city. There is a small plot of arboretum (10x10 m) and there is nothing natural from the forest on this site.

Still what, I'll leave it as it is-E. trichopterus. The definition is correct and transparent. Let our entomologists do a better job

28.09.2018 0:43, KorvinBF08

The second batch of weevils from Makayenka, Minsk, 19.08.17 (and the last one in general).

Photo 1-2 - elephant head with dorsal antennal grooves. Head size 0.8 mm. I think it's Otiorhynchus ovatus;

Photo 3-7 - elephant heads of the Trachyphloeini tribe (already learned

), but I can't determine the water type. Is it really Romualdius scaber again? Head sizes 0.7 mm.

Photo 8-apparently part of the nadc. Trachyphloeini. The size of the longest fragment is 2 mm.

Ilya, please give us some advice this time, too. If it is objectively impossible to determine, just specify it.

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28.09.2018 6:41, Mantispid

The second batch of weevils from Makayenka, Minsk, 19.08.17 (and the last one in general).

Photo 1-2 - elephant head with dorsal antennal grooves. Head size 0.8 mm. I think it's Otiorhynchus ovatus;

Photo 3-7 - elephant heads of the Trachyphloeini tribe (already learned ), but I can't determine the water type. Is it really Romualdius scaber again? Head sizes 0.7 mm.

Photo 8-apparently part of the nadc. Trachyphloeini. The size of the longest fragment is 2 mm.

Ilya, please give us some advice this time, too. If it is objectively impossible to determine, just specify it.

The first one is exactly from Otiorhynchus ovatus
The second and third-I think one from Romualdius scaber, and the other from Cathormiocerus aristatus. Of the Trachyphloeini, these are the most likely species.

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