penicillium guanacastense penicillium guanacastense penicillium guanacastense is a species of the genus of penicillium which was isolated from caterpillars from costa rica. penicillium guanacastense scientific classification kingdom: fungi division: ascomycota class: eurotiomycetes order: eurotiales family: trichocomaceae genus: penicillium species: p. guanacastense binomial name penicillium guanacastenserivera, urb & seifert 2012