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Craticula cuspidata has narrower apices and a central area with concave sides. Craticula pampeana is much larger and has broader apices.

LM scalebar = 10 µm
Cratacid1 Cratacid2 Cratacid3 Cratacid4 Cratacid5 Cratacid6 Cratacid7
Length Range
94-168 µm
Width Range
22-29 µm
Striae in 10 µm
12-14

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 pampeana

(Freng.) Lange-Bert. 2003

Craticula pampeana LM4 Craticula pampeana LM2 Craticula pampeana LM3 Craticula pampeana LM1 Craticula pampeana LM5
Length Range
139-274 µm
Width Range
29-45 µm
Striae in 10 µm
10-12

Craticula coloradensis

Edlund, D.R.L.Burge and S.A.Spauld. 2017

Craticula coloradensis LM5 Craticula coloradensis LM4 Craticula coloradensis LM7 Craticula coloradensis LM6 Craticula coloradensis LM3 Craticula coloradensis LM2 Craticula coloradensis LM1
Length Range
101-162 µm
Width Range
22.5-26.7 µm
Striae in 10 µm
transverse striae 11.9-14.3; longitudinal striae 20.0-23.8