Caloneis schumanniana var. biconstricta A. Berg in A. Berg & Hessland 1949, p. 192; pl. 3, fig. 11
as "Caloneis Schumanniana var. biconstricta (Grun.) Cl." in table on p. 192, as "Caloneis Schumanniana (Grun.) Cl. var. biconstricta Grun. f:a" in plate caption
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| Status | Invalid | |
| Comments | Not meant by Berg as a new taxon. No description. Listed by Cleve-Euler 1955 (ref. 001043), p. 99 in the synonymy of Caloneis silicula 'iota' Warmingii. |
| Published in | Berg, Å. and Hessland, I. 1949 [ref. 001097]. A Quaternary Diatom Spectrum from Bohuslän. Kongliga Svenska Vetenskapsakademien, Arkiv för Mineralogi och Geologi 1(6):169-198, 3 pls. |
| Type | | INA card not found. Click here to check this name in the INA website. |
| Collector | | Assessment of record accuracy | likely accurate |