Identificaciones de purenature

Suspected Neoboletus xanthopus. This was a very interesting find from yesterday, growing in a grassy patch on the woodland edge with Cantharellus amathysteus nearby. Found under Castanea sativa (sweet chestnut), and Fagus (beech).

My original thought was Neoboletus pseudosulphureus or something similar but I did not think of Neoboletus xanthopus which was just pointed out to me on European Boletes, and it fits perfectly. I know there is maybe one or two records of this species in the UK so this would make it very rare or at least under recorded. I have recorded the find but I'm wondering if it may need DNA sequencing to be completely sure of species as it could be something very similar.

It is near a pinetum with a large planting of imported tropical conifers. In rough grassland and leaf litter on a sunny woodland edge. There were a total of four fruitbodies that I could find although there could be a few still pinning. They were immature and small in size with a stout stipe. Staining rapidly dark ink blue in the flesh, blue/black staining of pores, cap and stipe staining almost black. Yellow pores, yellow stipe with a red flush, does not appear to be reticulated.

South Wales, UK.