Compare

Boreozonacola hustedtii is triundulate.

LM scalebar = 10 µm
Boreozonacola olympica LM1 Boreozonacola olympica LM2 Boreozonacola olympica LM3 Boreozonacola olympica LM4 Boreozonacola olympica LM5 Boreozonacola olympica LM6
Length Range
20-47 µm
Width Range
6.3-8.2 µm
Striae in 10 µm
18-20

Boreozonacola hustedtii

Lange-Bert., Kulikovskiy and Witkowski 2010

Boreozonacola hustedtii LM1 Boreozonacola hustedtii LM2 Boreozonacola hustedtii LM3 Boreozonacola hustedtii LM4 Boreozonacola hustedtii LM5
Length Range
21-46 µm
Width Range
5.4-9.4 µm
Striae in 10 µm
18-21

Also compare to

Navicula natchikae

J.B.Petersen 1946