Dear colleagues!
Can anyone help with the identification of a stipitate fleshy poroid fungus? The problem is in lacking of spores - fruitbodies were immature. Molecular analysis will be carried out, but maybe anyone has suggestions based on fruitbody habitus? The habitus was tricholomatoid, fruitbodies firm-fleshy, as in some agaricoid species. Appearance Tricholoma-like, but there was a white tube layer under a cap. My proposal was Boletopsis, but all Boletopsis species I know have another cap-stipe size ratio and are considerably larger.
The specimen was collected at Moscow Region (hemiboreal zone) on damp naked soil near a pond (probably, some buried wood was under the fruitbodies). Trees nearby were alder, spruce, birch, linden and bird cherry.
Photos (unfortunately, of not-so-high quality) are attached.
With thanks and regards,
Elena