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Wittrock & Nordstedt, Algae Aquae Dulcis Exs.
Wittrock, V.B.; Nordstedt, C.F.O. [1 - 1200]
Field Museum of Natural History
Catalog #: C0172544F
F. Wolle #s.n. 30 August 1881
Gomphosphaeria aponina Kützing
United States, Pennsylvania, Lehigh, Bethlehem
Miami University - Algae
Catalog #: 000198260
F. Wolle #s.n. 30 August 1881
Gomphosphaeria aponina var. cordiformis Wolle
United States, Pennsylvania, Americæ borealis in stagnis ad Bethlehem in Pensylvania