TY - JOUR

T1 - Description of Metchnikovella spiralis sp. n. (Microsporidia: Metchnikovellidae), with notes on the ultrastructure of metchnikovellids

AU - Sokolova, Y.Y.

AU - Paskerova, G.G.

AU - Rotari, Y.M.

AU - Nassonova, E.S.

AU - Smirnov, A.V.

PY - 2014

Y1 - 2014

N2 - The present paper reports results of TEM study of a metchikovellid microsporidium earlier described as Vivieria spiralis Rotari et Paskerova 2007, re-isolated from gregarines Polyrhabdina sp. inhabiting guts of polychaetes Pygospio elegans sampled at the White Sea silt littoral zone. Free sporogony (FS) occurred in the life cycle of the microsporidium alongside with sac-bound sporogony (SB). Free spores were of typical metchnikovellidean structure, uninucleate, oblong, measured on sections 1.3-1.9 x 2.0-3.2 µm and resided in a sporophorous vacuole. Life cycle included pre-sporogonial stages represented by dikaryotic cells and 4-nucleate cells with coupled nuclei. A multinucleate sporogonial plasmodium of FS split in numerous (>10) sporoblasts. In BS segregation of sporoblasts occurred within thick-walled cysts by internal budding. Spore sacs of this microsporidium measured in average 11.6 x 4.7 µm, were enclosed in external spiral carcass composed of a dense cord embracing the sac. These oval spore sacs conta

AB - The present paper reports results of TEM study of a metchikovellid microsporidium earlier described as Vivieria spiralis Rotari et Paskerova 2007, re-isolated from gregarines Polyrhabdina sp. inhabiting guts of polychaetes Pygospio elegans sampled at the White Sea silt littoral zone. Free sporogony (FS) occurred in the life cycle of the microsporidium alongside with sac-bound sporogony (SB). Free spores were of typical metchnikovellidean structure, uninucleate, oblong, measured on sections 1.3-1.9 x 2.0-3.2 µm and resided in a sporophorous vacuole. Life cycle included pre-sporogonial stages represented by dikaryotic cells and 4-nucleate cells with coupled nuclei. A multinucleate sporogonial plasmodium of FS split in numerous (>10) sporoblasts. In BS segregation of sporoblasts occurred within thick-walled cysts by internal budding. Spore sacs of this microsporidium measured in average 11.6 x 4.7 µm, were enclosed in external spiral carcass composed of a dense cord embracing the sac. These oval spore sacs conta

KW - Microsporidia

KW - Metchnikovellidae

KW - intracellular parasites

KW - hyperparasitism

KW - polychaetes

KW - gregarines

KW - ultrastructure

KW - life cycle

U2 - 10.1017/S0031182014000420

DO - 10.1017/S0031182014000420

M3 - Article

VL - 141

SP - 1108

EP - 1122

JO - Parasitology

JF - Parasitology

SN - 0031-1820

IS - 8

ER -