Tursicola costata has raised interstrial costae and strongly convergent striae.
Tursicola podocnemicola has linear-lanceolate valves, a wide rectangular stauros, deflected proximal raphe ends, and has been documented exclusively from the carapaces of the Amazon River turtle, Podocnemis erythrocephala.

LM scalebar = 10 µm
Length Range
13-61 µm
Width Range
2.0-5.2 µm
Striae in 10 µm
22-34
Tursiocola ziemanii LM2
Tursiocola ziemanii LM1
Tursiocola ziemanii LM3
Tursiocola ziemanii LM4
Tursiocola ziemanii LM5
Tursiocola ziemanii LM2 Tursiocola ziemanii LM1 Tursiocola ziemanii LM3 Tursiocola ziemanii LM4 Tursiocola ziemanii LM5

Also compare to

Tursiocola costata

Frankovich and M.J.Sullivan

Tursiocola podocnemicola

Wetzel, Van de Vijver and Ector