Fig. 1: Attachment of Pasteuria ramosa to Daphnia magna host.

a D. magna host with attachment sites for P. ramosa spores (green dots) attached to the foregut and hindgut, but not to the gut midsection (dark-green lining). P. ramosa spores marked with a green fluorescent dye (and indicated by white arrows) may attach to the foregut (b) or to the hindgut (c) of the D. magna host.