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 fo.
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 puddles.
C0667
2020004001
C0667
2020004002
C0667
2020001004
C0667
2020001004
2020004-001
Front view
Netherlands
2020004-002
Side view
Netherlands
2020001-004
Front view
Netherlands
2020001-004
Front view
Netherlands
C0667
2020001003
C0667
2020001003
C0667
2020001003
2020001-003
Apical view
Netherlands
2020001-003
Apical view
Netherlands
2020001-003
Apical view
Netherlands
All photos copyright: © 2009-2021 Alfred van Geest - Send comments to asvg@xs4all.nl