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

Cosmarium venustum f. trilobatum_('trilobata')Playfair image
Phycastrum trilobatumKützing image
Streptonema trilobatumG.C. Wallich image
Triceratium inconspicuum var. trilobatum ["trilobata"]J. Fenner image
Triceratium inconspicuum var. trilobatum_(`trilobata')J. Fenner Initial Rep. Deep Sea Drilling Project, Suppl. to vols. 38-41: 534, pl. 30: figs. 23-26 1978
Trigonema trilobatumWallich mscr. image
TRILOBATUMXiaosi Fang Bull. Inst. Geol., Chin. Acad. Geol. Sci. 14: 156 1987
Trilobatum yunnanenseXiaosi Fang Bull. Inst. Geol., Chin. Acad. Geol. Sci. 14: 157, fig. 5, pl. 1: fig. 15 1987
Xanthidium subtrilobatum var. inornatumSkuja image