John - Evidently the link to the pictures worked. Now all the freaky nerd diatom algae people will be visiting Pond Boss forum. The name referred to the circle of fused tubular processes on the valve rim.
This new species was found during an ecological water quality monitoring study of the cooling ponds. It basically bloomed at about 10% occurrence during the month of May and was growing with other centric diatoms indicative of eutrophic water: Stephanocyclus meneghiniana, Cyclostephanos tholiformis, and Aulacoseira granulata. If you want to see a picture of it with the other common diatoms in the bloom just let me know.
Ranges of Pond chemistries were (mg/L): alkalinity 14-16 mg/L, Ortho Phos 0.003-0.03, Total P 0.59-0.84, pH 7.0-9.3, Temp 69-73F.
Last edited by Bill Cody; 07/23/14 08:52 AM.
