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Staurosirella martyi possesses a single porefield and larger valves that are more heavily silicified than those of S. pinnata. Staurosira construens var. venter is elliptical, only rarely oval, in valve outline. The areolae of S. contruens var. venter are not lineolate and the costae are broader.

LM scalebar = 10 µm
Staurosirella pinnata LM2 Staurosirella pinnata LM1 Staurosirella pinnata LM3 Staurosirella pinnata LM4 Staurosirella pinnata LM5
Length Range
4-10 µm
Width Range
3-4 µm
Striae in 10 µm
11-14

Staurosirella martyi

(Hérib.) E.Morales and Manoylov 2006

Staurosirella martyi LM5 L2 88  S Martyi 13 Staurosirella martyi LM15 Staurosirella martyi LM10 Staurosirella martyi LM9 Staurosirella martyi LM12 Staurosirella martyi LM3
Length Range
6-28 µm
Width Range
5.5-8 µm
Striae in 10 µm
5-6

Staurosira construens var. venter

(Ehrenb.) Hamilton 1992

Staurosira construens var venter LM3 Staurosira construens var venter LM1 Staurosira construens var venter LM5 Staurosira construens var venter LM2 Staurosira construens var venter LM4
Length Range
5-26 µm
Width Range
4-5.5 µm
Striae in 10 µm
12-16