Names from Index Nominum Algarum

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Eunotia arcus Ehrenberg: Ber. Königl. Akad. Wiss. Berlin 1837: 45. 1837. (G)
Type locality: Sweden: Lapland
Fossil

See Himantidium arcus (Ehrenberg) Ehrenberg 1839
See Himantosoma arcus (Ehrenberg) Trevisan 1848 (inval.)
[as Eunotia Arcus; topotype material (diatomite from Degernäs, Sweden, in Cleve's collection no. 247 in S) studied by S. Mayama & H. Kobayasi (Jap. J. Phycol. 39: 131-141. 1991)]