Diatoms of North AmericaDiatoms of North America
Return to overview

Compare Craticula ambigua

D.G.Mann in Round, R.M.Crawford and D.G.Mann 1990

Compare

Craticula cuspidata has acute, rounded and, occasionally, slightly subrostrate ends. In addition, the size range of C. cuspidata is greater than that of C. ambigua. Craticula ambigua is larger than C. accomodiformis. Craticula riparia has smaller, narrower valves.

LM scalebar = 10 µm
Craticula ambigua LM4 Craticula ambigua LM2 Craticula ambigua LM1 Craticula ambigua LM6 Craticula ambigua LM5 Craticula ambigua LM3
Length Range
38-75 µm
Width Range
12-19 µm
Striae in 10 µm
13-21 in the valve center, 17-21 at the ends

Craticula cuspidata

(Kütz.) D.G.Mann 1990

C Cuspidata Gray 1 C Cuspidata Gray 5 C Cuspidata Gray 4 C Cuspidata Valve Forms Gray C Cuspidata Gray 3 C Cuspidata Gray 2
Length Range
95-157 µm
Width Range
24-36 µm
Striae in 10 µm
12-14 transverse, 24-26 longitudinal

Craticula accomodiformis

Lange-Bert. 1993

Craticula accomodiformis LM1 Craticula accomodiformis LM2 Craticula accomodiformis LM3 Craticula accomodiformis LM4 Craticula accomodiformis LM5 Craticula accomodiformis LM6 Craticula accomodiformis LM7
Length Range
30.5-36.4 µm
Width Range
9.9-13 µm
Striae in 10 µm
23-25 in the center valve, 25-29 in the ends

Craticula riparia

(Hust.) Lange-Bert. 1993

Craticula riparia LM1 Craticula riparia LM2 Craticula riparia LM3 Craticula riparia LM4 Craticula riparia LM5 Craticula riparia LM6 Craticula riparia LM7
Length Range
38-48 µm
Width Range
8.7-10.7 µm
Striae in 10 µm
17-20 at valve center, 16-20 at the ends