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

NameAuthorSourceCitationYear
Synedra amphicephala f. mesoleiaA. Cleve-Euler image
Synedra amphicephala f. mesoleptaA. Cleve-Euler image
Synedra amphicephalaF.T. Kützing image
Synedra amphicephalaKützing Bacillarien: 64, pl. 3: fig. XII 1844
Synedra amphicephala var. asiaticaSkvortzov Publ. Mus. Hoangho Paiho Tien Tsin 36: 6, pl. 1: fig. 10 1935
Synedra amphicephala var. balatonisJ. Pantocsek image
Synedra amphicephala var. densestriataC.W. Fontell image
Synedra amphicephala var. fallax(Grunow) Fontell Ark. Bot. 14{21}: 60 1917
Synedra amphicephala var. imperfectaA. Cleve-Euler image
Synedra amphicephala var. intermediaE.E. Manguin image
Synedra amphicephala var. minorA. Grunow image
Synedra amphicephala var. pusillaA. Cleve image
Synedra amphicephala var. sigmoideaJ. Schaarschmidt image
Synedra amphicephala var. striis-tenuioribusA. Grunow image
Synedra amphicephala var. tenuicapitataE.E. Manguin image