Carrying stowaways

I'm doing a refit on the side of my Graupner Pegasus to light it up for our clubs illuminated regatta and to experiment with some ideas for the Waverley. I removed a cabin section on the foredeck and found this below the supporting woodwork . Its localised and looks dead i only hope I bought this with the boat  and not infected it here 

Nasty

Barrie

It doesn't go into the decking it was glued to so it's either bugs with limited taste or it was in the sections supplied in the kit which makes me wonder what Graupner was flogging to the unsuspecting public or who was ripping off Graupner with third rate ply?
I wonder if I'll find more as I run my cables in?

Its strange that its on the surface. Was there any dust?

Barrie

Yes I brushed it all out to see how far it went.

That's to say the tracks of the bugs were full of dust but no deposits elsewhere it's occurred post build just how post I've no idea you wouldn't use worm marked wood in your build surely?