Myxobolus saladensis sp. nov., a new species of gill parasite of Mugil liza (Osteichthyes, Mugilidae) from Samborombón Bay, Buenos Aires, Argentina

MARCOTEGUI, PAULA; MARTORELLI, SERGIO

IHERINGIA. SéRIE ZOOLOGIA

FUNDACAO ZOOBOTANICA RIO GRANDE SUL

Año: 2017 vol. 107

0073-4721

Myxosporean Myxobolus saladensis sp. nov. in the gills of Mugil liza Valenciennes, 1836 from Samborombón Bay was described by light and electron microscopy studies. Spores were pyriform and binucleated, measuring 10.63±0.36 µm (n=20) long, 9.24±0.50 µm (n=20) wide and 4.13±0.36 µm (n=20) thick, included in polysporic cyst-like plasmodia. Elongated pyriform polar capsules were of equal size (3.84±0.27 µm long and 2.30±0.12 µm wide). The sporoplasm contained some sporoplasmosomes. Each PC contained a polar fi lament with 4-5 coils obliquely arranged in relation to the polar capsules axis. The PC wall was composed of two layers of diff erent electron densities. Based on the morphological and ultrastructure diff erences of the spore to those of previously described species of Myxobolus, we describe a new species, Myxobolus saladensis sp. nov.