Forum Entomologi Italiani

Today we'll talk about another interesting species of the family Cerambycidae: Xylotrechus pantherinus (SAVENIUS, 1825).

Across Europe, it is not often seen. Is associated with willows - it seems that it is monofagus willow Salix caprea. Beetles are difficult to observe on the bark, where it often reside. Do not visit flowers. The easiest way to find the wood of their larvae or pupae.

In Poland, by far, the species I found in one location discovered by my colleague entomologist Dariusz "Dispar" Łupiński.

Xylotrechus pantherinus:
Polska, Mielnik ad Siemiatycze,
7 VI 2007 - 1 ex., (many more specimens grown from Salix caprea in the years 2008-2014),
leg., det. A. Woźniak

Very interesting, as always, Adam. In Italy it is present only in Alto Adige and Trentino, were it is reported in just one collection, by my informations. In these localities it's very difficult to find it though, and few exemplars are found.

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Riccardo Poloni
La dignità degli elementi
la libertà della poesia,
al di là dei tradimenti degli uomini
è magia, è magia, è magia...
Negrita, Rotolando verso sud

Thank you very much, Riccardo.

X. pantherinus in Poland in recent years has been listed more often in different locations. Just for him, it grows a little bit older, diseased trees Salix caprea. Imagines very hard to see. It is much better to look for larvae, pupae and round exit holes in the bark.

You're right! This is the same thing that said me two friends of mine from Alto Adige.

_________________
Riccardo Poloni
La dignità degli elementi
la libertà della poesia,
al di là dei tradimenti degli uomini
è magia, è magia, è magia...
Negrita, Rotolando verso sud

In living wood right?

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Marci
"S'i fosse fuoco, arderei 'l mondo,
S'i fosse vento, lo tempesterei,
S'i fosse acqua, i' l'annegherei
s'i fosse dio, mandereil' en profondo" ( Cecco Angiolieri).

In Poland, X. pantherinus has 3 years of development. The larvae first feed in a living wood, and end development in dead wood. I have not met the young larvae in the wood completely dead. I found it in both branches of the cross-section of 3 cm and in trunks section 20 cm.
Best for the development of this species are partially blind and partially live tree, suffering, and weakened.

And another interesting fact:
I have never met on the same tree Xylotrechus pantherinus with Saperda similis! The latter species develops in young, live trees Salix caprea.

Actually it's a "Rusticoclytus", right?

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"Lasciate questo mondo un po' migliore di come lo avete trovato" (Sir Robert Baden Powell)
Daniele

Adam, very interesting as usual for your reports!
I would like to dedicate some time to searching this species in the Italian Alps. I know at least 2 sites where weakened Salix caprea are present and I am wondering whethere this beautiful "guy" is inside them!

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AleP

Daniele, if someone prefers it, to him would be: Xylotrechus (Rusticoclytus) pantherinus.

Alessandro, thank you for your kind words and I wish you success in your search!
Do not look only at the tree by the roadside. See also in the depths of the forest. S. similis likes to light and heat, but X. pantherinus does not have to be so much.

Sì, Daniele, nella nomenclatura che abbiamo deciso di adottare nel forum è Rusticoclytus.

_________________
Riccardo Poloni
La dignità degli elementi
la libertà della poesia,
al di là dei tradimenti degli uomini
è magia, è magia, è magia...
Negrita, Rotolando verso sud

Is or not? Someone treated Rusticoclytus as genus, others as genus. All right.
Sama 2002 placed Rusticoclytus as synonim of genus Xylotrechus. Later we have CPC (2010) - proposed rank of Rusticoclytus is genus. Later Danilevsky (2012, part III) proposed Rusticoclytus sgen. as subgenus of Xylotrechus.. Rusticoclytus on FEI is not scientific point view for problem but only temporary working solution. You can not confuse this with publications.

i suppose that FEI can decide to adopte a nomenclatural way such as a specialist is free to propose it or another.
In beetles it's frequent this, and nobody has finally autority to point a definitively solution, but only propose by supporting with dates and info...

_________________
Marci
"S'i fosse fuoco, arderei 'l mondo,
S'i fosse vento, lo tempesterei,
S'i fosse acqua, i' l'annegherei
s'i fosse dio, mandereil' en profondo" ( Cecco Angiolieri).

No way! Nobody can't DECIDE. Someone can proposed yours own point of view for problem, that's all.

You're right, Jacek!

Is it possible to restore the title of my topic: Xylotrechus rusticus?

I suppose that is unpossible. As has been previously written FEI have a own system of names (I agree with Entomarci). You must rather accepted it. It is not important as you think, Adam.

Look here: db.php?mode=data_list&db_id=1&view=thumbs&level=1&key=5