Cosmarium costatum var. gutwinskii Croasdale
Reference: Croasdale 1956
Synonym: ?Cosmarium crenatum forma tricrenatum Boldt 1885 (= Cosmarium boldtianum Gutwiński 1895), ?Cosmarium costatum forma Gutwiński 1892b (figure in Gutwiński 1893)
Compare with: Cosmarium cf. crenatum; Cosmarium crenatum f.
Reference: Croasdale 1956
Synonym: ?Cosmarium crenatum forma tricrenatum Boldt 1885 (= Cosmarium boldtianum Gutwiński 1895), ?Cosmarium costatum forma Gutwiński 1892b (figure in Gutwiński 1893)
Compare with: Cosmarium cf. crenatum; Cosmarium crenatum f.
Remarks: This taxon has four crenations on each side of the semicell and four at the apex. Sometimes a small granule is visible at the basal corner. The specimens depicted below originate from temporary rain puddles.
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| 2020004-001 Front view Netherlands |
2020004-002 Side view Netherlands |
2020001-004 Front view Netherlands |
2020001-004 Front view Netherlands |
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| 2020001-003 Apical view Netherlands |
2020001-003 Apical view Netherlands |
2020001-003 Apical view Netherlands |