Scarce Aspen Knot-horn

One record from Shapwick Heath in 1995.&nbsp; The larval host plant is aspen, which is not a common species in Somerset.

Powdered Knot-horn

Associated with thyme, and records are largely from areas of calcareous grassland.&nbsp; The closely-related Delplanqueia inscriptella was only separated from this species in 2015, and it may be that some of the older records of this moth relate to the other species.&nbsp; A valid record now requires dissection.

Brown Powdered Knot-horn

Only separated from D. dilutella in 2015.&nbsp; Like that species, it is associated with thyme.&nbsp; Only one record, from Brean Down in 2021.&nbsp; Almost certainly this does not tell the whole story, as it is likely some of the historic records of D. dilutella refer to this species, and undoubtedly it is under-recorded because a valid record requires dissection.

Delplanqueia inscriptella

Thyme Knot-horn