Silva Center for Phycological Documentation: Index Nominum Algarum

The INA is a card file and online reporting system maintained at the Silva Center for Phycological Documentation of the University Herbarium, University of California, Berkeley. It contains nearly 200,000 names of algae (in the broad sense). The BPU is a card file containing bibliographic references pertaining to algal taxonomy.
A working list of algal type specimens at UC is available here

Results from INA database

Navicula amphisbaenaBory image
Navicula amphisbaena var. fuscata(Schumann) Grunow image
Navicula amphisbaena var. liburnica(Grunow) M. Peragallo Cat. gén. Diatom., 2: 516 1903
Navicula amphisbaena var. obtusaCarruthers image
Navicula amphisbaena var. sphaerophora(Kützing) Rabenhorst image
Navicula amphisbaena var. subsalina(Donkin) T. Marsson Zeitschrift für angewandte Mikroskopie und klinische Chemie 6: 41 1900
Navicula amphisbaena var. vukotinovicii(Pantocsek) M. Peragallo Cat. gén. Diatom., 2: 516 1903