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- Significant Record / Very Rare / Vagrant 
- Migrant
** Photograph required
**
- care required in the identification process, as confusion with similar species is likely - quality photographs required. Confusion Species: Dioryctria abietella (Pine Knot-horn); Dioryctria schuetzeella (Spruce Knot-horn); Dioryctria simplicella(Drab Pine Knot-horn):
ID pointers: A smoothly curved sub-terminal line helps to distinguish this from other similar species, of which there are four Dioryctria species occurring in Britain and this is also generally the largest of the four.
Distribution: (Last record: 22/07/2016 at Rosliston Forest Centre, Swadlincote ) - DaNES records 4 prior to 2010 and one from Rosliston Forest Centre, Swadlincote 22/7/2016:
*** Last updated on 31 March 2025 by TD ***
Last Recorded Date: 22/07/2016
Last Recorded Year: 2016
Last Recorded By - DaNES
Last Recorded General Area - Rosliston Forest Centre, Swadlincote
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