Bryozoa statoblasts like these were found in the late Holocene sediments of Nyabuiyabui Swamp, a freshwater swamp on the Mau Escarpment in Kenya, at 2900 m asl. If it is possible to identify this to the genus or species level please contact us! It may yield some information on the evolution of this important wetland.
It appears to be 2-3 mm or so in diameter, has a darker center, and rounded hooks at each end. Possibly from the Lophopodidae family?
Francis, D.R. (2001) Bryozoan statoblasts. In Smol, J.P. Birks, H.J.B. and Last, W.M. (eds) Tracking Environmental Change Using Lake Sediments. Volume 4: Zoological Indicators. Kluwer Academic Publishers, Dordrecht, 105-123.
Lacourt, A.W., 1968. A monograph of the freshwater Bryozoa-Phylactolaemata. Zoologische Verhandelingen 93, Leiden.
Massard, J.A., and Geimer, G. 2008. Global diversity of bryozoans (Bryozoa or Ectoprocta) in freshwater: an update. Bulletin of the Société des Naturalistes Luxembourgeois 109: 139-148.
Posted by: Colin J. Courtney Mustaphi, August 1, 2014