Friday mystery object #366 answer


Last week I gave you this unwelcome visitor to the Dead Zoo to identify:

I’ve given you something very similar before, which most people mistakenly identified as being this species.

It’s in the family Ptinidae, home of several species that are considered pests, thanks to their habit of boring holes in various different materials. They all tend to look quite similar, although the shape of the pronotum (the bit between the abdomen and the teensy head) is a useful feature.

As Andy Calver and Thomas Rouillar intimated on Twitter and joe vans hinted in the comments, this particular beetle is normally associated with boring holes in carbohydrate rich substances, which can include drugs, tobacco, bread and biscuits. It’s known as the Drugstore Beetle, Cigarette Beetle, Bread Beetle or Biscuit Beetle depending on your particular interest in what it destroys. Of course, other beetles can share some of these proclivities and therefore claim some of the same names, so for clarity the scientific name is Stegobium paniceum (Linnaeus, 1758).

In museums they can tun up for a variety of reasons. Sometimes they’ll be feeding on starchy glues in book spines, they love a dried plant in a herbarium, they’ll give animal hides and museum specimens a nibble, and about the only thing they like more than poisoned grain used as rodent bait would be some biscuit crumbs.

So well done to everyone who worked it out and if you didn’t manage it then never fear, there’s always next week’s!

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