Diatoms of North AmericaDiatoms of North America
Return to overview

Compare Navicula gregaria

Donkin 1861

Compare

Navicula gregaria is smaller than N. germainii and has distinct areolae. Navicula subrostellata possesses straight proximal raphe ends and a symmetric central area. Navicula canalis is more linear than N. gregaria, that is, it has a smaller length to width ratio. Nevertheless, small specimens of N. canalis may be confused with specimens of N. gregaria.

LM scalebar = 10 µm
Navicula gregaria LM4 Navicula gregaria LM5 Navicula gregaria LM3 Navicula gregaria LM7 Navicula gregaria LM6 Navicula gregaria LM2 Navicula gregaria LM1
Length Range
16-35 µm
Width Range
4.1-7.0 µm
Striae in 10 µm
14-18 in the center valve

Navicula germainii

J.H.Wallace 1960

Gsn24379 04 1 Gs127032 Nagerm 1 Gc42397 Nagerm Notin Circle6 Gs127032 Nagerm 4 1 Gsn24379 01 Gsn24379 02 1 Gs127032 Nagerm 2
Length Range
32-39 µm
Width Range
7.0-8.3 µm
Striae in 10 µm
13-15

Navicula subrostellata

Hust. 1955

Gc6604A Nasecr Apiculata Holo Circle1A Gc104413A Gsn00987 Naamm3 Gc6604A Nasecr Apiculata Holo Not In Circle1A Gc6604A Nasecr Apiculata Holo Not In Circle3 Gc6604A Nasecr Apiculata Holo Not In Circle2 Gc104413A Gsn00987 Naamm2B
Length Range
27-31 µm
Width Range
6.0-6.8 µm
Striae in 10 µm
14-16

Navicula canalis

R.M.Patrick 1944

Navicula canalis LM6 Navicula canalis LM5 Navicula canalis LM3 Navicula canalis LM7 Navicula canalis LM4 Navicula canalis LM2 Navicula canalis LM1
Length Range
19.6-25 µm
Width Range
4.1-5.5 µm
Striae in 10 µm
16-19