Diatoms of North AmericaDiatoms of North America
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Compare Cavinula pusio

(Cleve) Lange-Bert. in Werum and Lange-Bert. 2004

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Cavinula pusio is distinct, as compared to species currently within the genus. Both C. cocconeiformis and C. scutiformis lack protracted apices and have larger central areas. Cavinula pusio, however, may be confused with Navicula detenta, a species that may belong in Cavinula. Navicula detenta has smaller valves and generally lacks short striae around the central area.

LM scalebar = 10 µm
Caloneis budensis LM1 Caloneis budensis LM2 Caloneis budensis LM3 Caloneis budensis LM4 Caloneis budensis LM5 Caloneis budensis LM6 Caloneis budensis LM7
Length Range
18.9-22.8 µm
Width Range
9.2-10.8 µm
Striae in 10 µm
30-36 in 10 µm at the valve center, including short striae; a little closer at the apices

Cavinula cocconeiformis

(Gregory ex Grev.) D.G.Mann and Stickle in Round, R.M.Crawford and D.G.Mann 1990

Cavinula cocconeiformis LM7 Cavinula cocconeiformis LM1 Cavinula cocconeiformis LM2 Cavinula cocconeiformis LM3 Cavinula cocconeiformis LM4 Cavinula cocconeiformis LM5
Length Range
9-28 µm
Width Range
6-9 µm
Striae in 10 µm
26-32 in the center valve, 28-34 at the ends

Cavinula scutiformis

(Grunow ex Schmidt) D.G.Mann and Stickle in Round et al. 1990

Cavicula scutiformis LM1 Cavicula scutiformis LM2 Cavicula scutiformis LM3 Cavicula scutiformis LM4 Cavicula scutiformis LM5 Cavicula scutiformis LM6 Cavicula scutiformis LM7
Length Range
18-36 µm
Width Range
12.3-17.7 µm
Striae in 10 µm
24-26 at the valve center, 28-32 near the apices

Adlafia detenta

(Hust.) Heudre et al. 2018

Navicula detenta LM7 Navicula detenta LM6 Navicula detenta LM5 Navicula detenta LM4 Navicula detenta LM3 Navicula detenta LM2 Navicula detenta LM1
Length Range
16-19 µm
Width Range
5.8-6.8 µm
Striae in 10 µm
28-32