Cerylon histeroides


A very small beetle, 1.8 to 2.3 mm. Adults are dark brown, sometimes dark reddish-brown or even blackish. The pronotum is broadly quadrate and strongly punctured.

Similar Species

It is superficially similar to C. fagi but is generally more slender in appearance and readily distinguished by the form of the antennae; here segments 4-7 are quadrate to slightly elongate, segments 8 and 9 are transverse and widest at, or very close to, the apex, and none are rounded laterally.

Identification difficulty
Recording advice

Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.


Adults and larvae inhabit a range of both deciduous and coniferous trees, often in woodland habitats, but not exclusively so.  They may often be found beneath bark.

When to see it

Can be found in most months of the year.

UK Status

It is generally common across England and Wales though less so in the north and very local and sporadic further north.

VC55 Status

Fairly frequent in Leicestershire and Rutland.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map