Wittrock & Nordstedt, Algae Aquae Dulcis Exs.
Wittrock, V.B.; Nordstedt, C.F.O. [1 - 1200]

Miami University - Algae
Catalog #: 000198192
s.n.
Porphyridium wittrockii Richter, 1882

Field Museum of Natural History
Catalog #: C0503928F
P. Richter s.n. 29 November 1881
Porphyridium cruentum (S.F.Gray) Nägeli
Germany, Anger, Lipsiam