| Catalogue of Diatom Names, On-Line Version, Updated 19 Sep 2011 |
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| Placoneis protracta (Grunow in Cleve & Grunow) Mereschkowsky 1903, p. 16; pl. 1, fig. 30 | |||
| Basionym | Navicula crucicula var. protracta Grunow in Cleve & Grunow 1880 | ||
| Status | Valid | ||
| Published in | Mereschkowsky, C. 1903 [ref. 001384]. Uber Placoneis, ein neues Diatomeen-Genus. Beihefte zum Botanischen Centralblatt 15(1):1-30, pl. 1. | ||
| 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 | Navicula crucicula var. protracta Grunow in Cleve & Grunow 1880 Navicula lundstroemii var. protracta (Grunow in Cleve & Grunow) Kolbe 1927 Navicula protracta (Grunow in Cleve & Grunow) Cleve 1894 Pinnularia protracta (Grunow in Cleve & Grunow) Mayer 1913 | ||