Mp. Gracia et al., ULTRASTRUCTURAL-STUDY OF SPHAEROMYXA-BALBIANII, THELOHAN 1892 (MYXOZOA, MYXOSPOREA, BIVALVULIDA), A PARASITE OF CEPOLA-MACROPHTHALMA, LINNAEUS 1758, Acta protozoologica, 36(3), 1997, pp. 171-179
An ultrastructural study of Sphaeromyxa balbianii has been carried out
for the first time. The parasite was found in the gall bladder of Cep
ola macrophthalma caught in the Catalan coasts (NW Mediterranean). The
trophozoites of S. balbianii were polysporal plasmodia of big size (4
-6 mm) acid discoid shape. A variable number of plasmodia could be fou
nd free inside each gall bladder. The spores, proved to be one of the
most defining parameters at species level. There were straight and siz
ed 15.82 x 4.84 mu m showing two polar capsules at the opposite ends.
A discussion on the ultrastructure of the parasites as well as on the
taxonomy of the genus Sphaeromyxa is provided.