Compare

Cocconeis placentula sensu lato has a higher stria density on both valves and the areolae are the same size across the valve face.

LM scalebar = 10 µm
Cocconeis fluviatilis LM1 Cocconeis fluvuatilis LM2 Cocconeis fluviatilis LM4 Cocconeis fluviatilis LM5 Cocconeis fluviatilis LM3
Length Range
20-24 µm
Width Range
13-19 µm
Striae in 10 µm
12-13

Cocconeis placentula sensu lato

Ehrenb. 1838

Cocconeis placentula LM1 Gc109658  Mo000285  Ccplac2 Ed Gc109658  Mo000285  Ccplac3 Ed Gc100282  Gs016353  Cclplac1 Ed Gc109658  Mo000285  Ccplac1 Ed Gc108381  Nx000030  Ccpseudol1 Ed Gc100282  Gs016353  Cclplac2 Ed
Length Range
9-68 µm
Width Range
7-32 µm
Striae in 10 µm
20-24 on raphe valve, 15-25 on rapheless valve