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

Amphora holsaticaF. Hustedt image
Amphora holsatica f. pyriformis Å.Berg image
Amphora holsaticaHustedt in Pascher Süssw.-Fl. 10, 2 Aufl.: 345, fig. 633 1930
Amphora holsatica var. malayanaG.A. Prowse image
Amphora holsatica var. teneraN.I. Karaeva image
Amphora holsatica var. ventrestriata .Berg image
Halamphora holsatica(Hustedt) Z. Levkov Diatoms of Europe 5: 196 2009