Order (Singh, 1952) & Family (Jollos 1917, Zulueta, 1917): Limax-form; monopodial; clear, hemispherical eruptive, anterior bulges (Illustrated Guide, 1985).
Genus: No flagellate stage; uninulceate (Illustrated Guide, 1985).

Vahlkampfia sp. 3 clips Yanase river Fujimi Saitama, 1999