Table 3.

Synonyms and traits of Cocconeisskvortzowii (≡ var.baikalensis Skvortzow, 1937) in published sources.

Epithet spelled exactly as in the source	Distribution source (specimens)	Valve measurements			Comments	Reference
		Length (μm)	Width (μm)	Striae in 10 μm
Cocconeisplacentula(Ehr.)var.baikalensis	p. 297: little bottom sample collected by Prof. K.I. Meyer at the depth of 33 meters near the Olhon Gate of Baikal Lake July 29, 1916	12–24	6.8–14	18 (SV), 30 (RV)	description and drawings of the taxon do not correspond to the “first” epithet	Skvortzow (1937, 310, Pl. 5, figs 5(?), 7, 8)
Cocconeisplacentula Ehr. var. Skvortzowii (Skv.) Skabitsch.	Baikal Lake	12–24	7–14	18 (SV), 30 (RV)	n.d.	Sheshukova (1950, 86, table 30, figs 10а, b)
Cocconeisskvortzowii (Skv.) Sheshukova	Baikal Lake	14–36	8–22	15–20 (SV)	emended description and all drawings correspond to protologue (Skvortzow 1937)	Sheshukova (1951, 193, fig. 104, а–c)
Cocconeisplacentulavar.sibirica	n.d.	n.d.	n.d.	n.d.	n.d.	Skabitschewsky (1951, 36)
CocconeisplacentulaEhr.subsp.sibirica (Skv.) Skabitsch.	Baikal Lake, eastern shore in the area of Davsha Bay and Cape Pongonye (Tolsty), from Chaetomorphacurta, depth 30–50 m. Material from the Expedition of the Limnological Institute, June 1965	11–32	7–15	13–15 (SV), 20 (RV)	Based on Skvortzov’s description in Skvortzow (1937), author incorrectly provided data on striae density of RV and SV (confused with each other)	Skabichevsky (1977, 127, figs 2, 9–11)

n.d. – no data.