vahlkampfia jugosa vahlkampfia jugosa vahlkampfia jugosa is a species of excavates. it has a pas-positive surface layer and forms cysts in culture. vahlkampfia jugosa scientific classification domain: eukaryota phylum: percolozoa class: heterolobosea order: schizopyrenida family: vahlkampfiidae genus: vahlkampfia species: v. jugosa binomial name vahlkampfia jugosapage, 1967