New boletes from Costa Rica

Boletus flavoniger, B. lychnipes, B. neoregius, and B. quercophilus are newly described from Quercus dominated forests of Costa Rica. Boletus firmus, a misunderstood taxon from eastern North America, is reported for the first time in Costa Rica. Boletus neoregius and B. quercophilus have been found in a number of sites throughout the country while B. flavoniger, B. lychnipes, and B. firmus appear restricted to unique localities. Their exact distribution outside of Costa Rica is unknown, but they may be expected in other oak-dominated forests in Central America and northern South America.