Cosmarium superbum Taylor
Reference: Taylor 1934
Remarks: Irénée-Marie 1956 described a var. decoratum where every granule is surrounded by 6 triangular depressions, producing an iridescent effect (see pictures below). Taylor did not mention this in his original description, but it cannot ruled out that this is a form of optical illusion that arises from the regular alternation of granules and pore fields, that is more visible in a certain microscopical setting than in another.
C0500
2017059001
C0500
2017059001
2017059-001
Front view
USA (WA)
Collected by Robin Matthews
2017059-001
Front view
USA (WA)
Collected by Robin Matthews
C0500
2017059001
C0500
2017059001
2017059-001
Front view
USA (WA)
Collected by Robin Matthews
2017059-001
Front view
USA (WA)
Collected by Robin Matthews
C1000
2017059001
C1000
2017059001
2017059-001
Detail
USA (WA)
Collected by Robin Matthews
2017059-001
Detail
USA (WA)
Collected by Robin Matthews
C1000
2017059001
C1000
2017059001
2017059-001
Detail
USA (WA)
Collected by Robin Matthews
2017059-001
Detail
USA (WA)
Collected by Robin Matthews
C0500
2016041005
C0500
2016041005
2016041-005
Apical view
USA (WA)
Collected by Robin Matthews
2016041-005
Apical view
USA (WA)
Collected by Robin Matthews
C0500
2016041005
2016041-005
Oblique view
USA (WA)
Collected by Robin Matthews
All photos copyright: © 2009-2019 Alfred van Geest - Send comments to asvg@xs4all.nl