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

ARCHAEPERIDINIUM(Jørgensen) Balech image
ARCHAEPERIDINIUM(Jørgensen) Lebour image
Archaeperidinium bailongenseT. Liu, K.N. Mertens, & H. Gu in Liu et al. Phycol. Research 63: 136, figs. 2-19 2015
Archaeperidinium constrictum(T.H. Abé) T. Liu, K.N. Mertens, K. Matsuoka & H. Gu in Liu et al. Phycol. Research 63: 138 2015
Archaeperidinium minutum(Kofoid) Jørgensen image
Archaeperidinium monospinum(Paulsen) Jørgensen image