Staurosirella sp. 1
Length: 37

 Width: 10

Striae:9






























Collection 1158

 Other images

 More information



Return to Top Page Return to Genera List Return to Species List

Authority information

Based on preliminary observations and genus description of Williams and Round (1987), this variety may be more appropriate in the genus Staurosirella. However, further investigation is necessary before the transfer can be made.


More information

Originally, the pictured specimen was identified as Fragilaria leptostauron var. fossilis (Pant.) Rehakova by Stoermer and Yang (1969) and the following information refers to this taxon. Compared to the nominate variety, this variety's valves are elongated at the apical axis and less strongly swollen at the mid section of the valve (Stoermer and Yang 1969).

  • Synonyms (Stoermer and Yang 1969)
    Staurosira harrisonii var. fossilis Pant. 1902

    Fragilaria leptostauron var. fossilis (Pant.) Rehakova, Rozpr. Ustred. Ust. geol.
    Ceskoslavokia, 32: 37, pl. 11, figs. 17-18. 1965.

  • Ecology

    Size ranges and morphology

    The maximum size of this variety exceeds the nominate variety. Specimens in the Great Lakes collections reach 45 micrometers in length (Stoermer and Yang 1969).