Cosmarium subexcavatum var. ordinatum West & G.S.West
Group of cells at two focus points; one face view and two in side view. Houghton Regis Chalk Pit (Marl Lakes) SSSI, Bedfordshire, UK.
Date: 17 May 2013
Copyright: © C.F.Carter(chris.carter@6cvw.freeuk.com)
Image Reference: 23690
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