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

CAULACANTHUSKützing Phycol. General.: 395 1843
Caulacanthus compressusHarvey Proc. Amer. Acad. Arts & Sci. 4: 331 1860
Caulacanthus divaricatus(Suhr) Papenfuss Journal of South African Botany 9: 86 1943
Caulacanthus fastigatusKützing Phyc. gen.: 395 1843
Caulacanthus fastigatusKützing image
Caulacanthus horridulusMontagne image
Caulacanthus indicusWeber-van Bosse (cont.) image
Caulacanthus indicusWeber-van Bosse Siboga-Exped. Monogr. 59b: 222, fig. 67 [bis] 1921
Caulacanthus okamurae_('okamurai')Yamada J. Fac. Sc. Hokkaido Univ. V, 2: 278 1933
Caulacanthus rayssiaeJ. Feldmann & G. Feldmann image
Caulacanthus rigidusKützing image
Caulacanthus salifugusCribb image
Caulacanthus spinellus(Hooker & Harvey) Kützing image
Caulacanthus spinellus(J. Hooker & Harvey) Kützing Species algarum: 753 1849
Caulacanthus ustulatus(Turner) Kützing Phycol. General.: 395 1843
Caulacanthus ustulatus(Turner) Kützing image
Caulacanthus ustulatus f. tenuiorWeber-van Bosse image
Caulacanthus ustulatus var. caespitosus_('caespitosa')(C. Agardh) J. Agardh image
Caulacanthus ustulatus var. crinalisJ. Agardh image
Caulacanthus ustulatus var. fastigiatus(Kützing) Pilger image
Caulacanthus ustulatus var. fastigiatusPilger Bot. Jahrb. 57: 5 1920
Caulacanthus ustulatus var. spinellus_('spinella')(Harvey) J. Agardh image
PSEUDOCAULACANTHUSJ.M. Huisman Algae of Australia: Marine Benthic Algae of North-western Australia. 2: 163 2018
Pseudocaulacanthus spinescensJ.M. Huisman Algae of Australia: Marine Benthic Algae of North-western Australia. 2: 164, fig. 38A-F 2018