Ophrydium cluster

Ophrydium cluster

Observation - Ophrydium cluster - UK and Ireland. Description: I saw these in July last year & can't find much information. Local wildlife trust can't help, neither can the Natural History museum, except to suggest a couple of papers on O.

I saw these in July last year & can't find much information. Local wildlife trust can't help, neither can the Natural History museum, except to suggest a couple of papers on O. versatile distribution in African rivers...

Returning in early June this summer, the pond contained no colonies and was quite murky.

Have they disappeared, or to the individual balls form and disperse each year?

I understand the balls have a rudimentary structure, can contain other organisms and that the individual cilliates contain chlorophyll-bearing symbionts.

Has anyone studied them in depth (sorry for the unintentional pun)? I'm particulary curious about their distribution around the UK, and through pre-history.

Mods, if this is inappropriate use of the 'observations' please feel free to move all this -to a forum or wherever- it's my first question and I'm still groping.