A new species of Myxobolus (Cnidaria: Myxosporea: Myxobolidae) from the gibel carp Carassius gibelio (Cypriniformes: Cyprinidae).

Myxobolus zhaltsanovae n. sp., is described from the gills of gibel carp Carassius gibelio found during a survey of myxozoans from the watershed of Lake Baikal, Russia, based on morphological and molecular characterizations.

Genetic diversity of Loma acerinae (Microsporidia: Glugeida) from different fish hosts and localities - Short communication.

Loma acerinae is a xenoma-forming fish microsporidium described from common ruffe Gymnocephalus cernua (Perciformes: Percidae) and also found in Ponto-Caspian gobies (Gobiiformes: Gobiidae). This casts doubt on the strict host specificity of this parasite. The largest subunit RNA polymerase II (rpb1) was used as a genetic marker of the parasite isolated from six host species of Perciformes (G.

Common dace (Leuciscus leuciscus) - A new host of the myxozoan fish parasite, Myxobolus elegans (Cnidaria: Myxozoa) - Short communication.

This paper reports the detection of the myxozoan species Myxobolus elegans Kashkovsky 1966 in common dace (Leuciscus leuciscus) that has not been previously listed as its host. The problem of differentiation of phenotypically similar Myxobolus species is addressed. During parasitological survey of common dace from the desalinated part of the Gulf of Finland at the city of Sestroretsk, Russia, numerous oval-shaped plasmodia, 0.

Myxobolus pelecicola Voronin et Dudin 2015 is a junior synonym of Myxobolus ladogensis Rumyantsev et Schulman 1997 (Myxosporea: Myxobolidae) infecting the skeletal muscle of sichel Pelecus cultratus (Actinopterygii: Cyprinidae) in Russia.

Myxobolus pelecicola Voronin et Dudin, 2015 was recently described from the skeletal musculature of sichel Pelecus cultratus. However, another species, Myxobolus ladogensis Rumyantsev et Schulman, 1997, was described previously from the same host, displaying identical tissue localization and spore morphology as in M. pelecicola.

Taxonomy of Neoperezia chironomi and Neoperezia semenovaiae comb. nov. (Microsporidia, Aquasporidia): Lessons from ultrastructure and ribosomal DNA sequence data.

We did a comparative analysis of the small subunit ribosomal DNA (rDNA) for two species of Microsporidia, Semenovaia chironomi and Neoperezia chironomi, both parasites of Chironomus plumosus (Diptera, Chironomidae). These two microsporidial species have been described previously on the basis of light and electron microscopic studies. The former species is dimorphic, producing both single diplokaryotic spores and uninucleate spores in sporophorous vesicles (SPVs) in packets of 16, while the latter species is monomorphic, disporoblastic, producing only uninucleate spores in SPVs.

Ultrastructure and molecular phylogenetics of Helmichia lacustris, a microsporidium with an uncoiled isofilar polar filament.

The description of Helmichia lacustris Voronin (Parazitologiya 34:327-331 1998) is supplemented with morphogenesis and ultrastructure of the extrusion apparatus. Formation of the anterior (made up by rare short lamellae) and posterior (made up by spongy matter or small vesicles) regions of the polaroplast is preceded by granulated spheres and agglomerations of bean-like bodies, respectively. The anchoring disc is formed by an oval structure of moderate electron density, sometimes possessing a granular texture.

Life cycle, ultrastructure, and molecular phylogeny of Crispospora chironomi g.n. sp.n. (Microsporidia: Terresporidia), a parasite of Chironomus plumosus L. (Diptera: Chironomidae).

The life cycle, ultrastructure, and molecular phylogeny of a new microsporidium Crispospora chironomi g.n. sp.

Ultrastructure and molecular phylogeny of Anisofilariata chironomi g.n. sp.n. (Microsporidia: Terresporidia) from Chironomus plumosus L. (Diptera: Chironomidae).

Larvae of Chironomus plumosus, collected in North-Western Russia in September 2008, were infected with a microsporidium possessing broadly oval uninucleate spores in sporophorous vesicles. Sporogony and spore ultrastructure of this microsporidium differed from that of known microsporidian species, suggesting establishment of a new species, Anisofilariata chironomi, being a type species of a new genus. Sporogony di-, tetra-, octo-, and 16-sporoblastic.