Compare

Navicula genovefae is smaller length and breadth, and the central striae are more coarse. Prestauroneis integra is broader and the margins are tri-undulate.

LM scalebar = 10 µm
Prestauroneis protracta LM3 Prestauroneis protracta LM6 Prestauroneis protracta LM4 Prestauroneis protracta LM7 Prestauroneis protracta LM5 Prestauroneis protracta LM2 Prestauroneis protracta LM1
Length Range
26.0-32.8 µm
Width Range
6.5-7.6 µm
Striae in 10 µm
18-22

Navicula genovefae

Fusey 1951

Navicula genovefae LM5 Navicula genovefae LM6 Navicula genovefae LM2 Navicula genovefae LM3 Navicula genovefae LM4 Navicula genovefae LM7 Navicula genovefae LM1
Length Range
18.8-25.1 µm
Width Range
5.5-5.9 µm
Striae in 10 µm
14-16 at midvalve; 19-21 toward the apices

Prestauroneis integra

(W.Sm.) Bruder 2008

Prestauroneis integra LM10 Prestauroneis integra LM6 Prestauroneis integra LM2 Prestauroneis integra LM5 Prestauroneis integra LM4
Length Range
26.6-43.0 µm
Width Range
9.3-12.6 µm
Striae in 10 µm
9.9-15 at center of the valve, 15.7-20.8 near the apices