Tanysphyrus lemnae

1.2-1.9mm. This tiny weevil is closely associated with duckweeds (Lemna sp.). Generally dark with patches of pale scales on the thorax, abdomen and femora. The rostrum is a similar length to the pronotum. Key features are the tarsal segments: the third has wide lobes and the end segment barely protrudes giving a truncate appearance.

Tanysphyrus atra is broadly similar but has only been found at one site in Eastern England. This species lacks a subapical tooth on the inner margin of the pro-tibia.

Unless identified by a recognised expert, photographic evidence is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used. Note the beetle's size and describe the identifying characters. It is advisable to retain the specimen in case further checks are needed.

Wetland where duckweed is found.

All year, but the adults are most active from March to November.

Common and widespread across England and Wales, particularly in the south.

Likely to be common but under-recorded.