| Catalogue of Diatom Names, On-Line Version, Updated 19 Sep 2011 |
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| Semiorbis hemicyclus (Ehrenberg) Patrick 1966, p. 163; pl. 9, fig. 7 | |||
| Basionym | Synedra hemicyclus Ehrenberg 1840 | ||
| Published in | Patrick, R.M. and Reimer, C.W. 1966 [ref. 003167]. The Diatoms of the United States exclusive of Alaska and Hawaii. Volume 1. Fragilariaceae, Eunotoniaceae, Achnanthaceae, Naviculaceae. Monographs of the Academy of Natural Sciences of Philadelphia. 13:688 pp., 64 pls. | ||
| Type | Click here to view INA card. Click here to check this name in the INA website. | ||
| Collector | Assessment of record accuracy | likely accurate | |
| List of nomenclatural synonyms | Amphicampa hemicyclus (Ehrenberg) Karsten 1928 Ceratoneis hemicyclus (Ehrenberg) Grunow 1865 Pseudo-eunotia hemicyclus (Ehrenberg) Grunow in Van Heurck 1881 Synedra hemicyclus Ehrenberg 1840 Eunotia hemicyclus (Ehrenberg) Ralfs in Pritchard 1861 | ||