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 minimaGrunow in Van Heurck Syn. Diat. Belgique: expl. pl. XIV: fig. 15 1880
Navicula minima var. atomoides(Grunow) Cleve K. Svenska Vet.-Akad. Handl., ser. 4, 26{2}: 128 1894
Navicula minima var. okamuraeSkvortzov image
Navicula minima var. pseudofossilis(Krasske) Reimer image
Navicula minima var. typicaRoss image
Navicula minima var. znioiensis_('znióiensis')Eber image