The genus Stephanostomum consists of digenean trematodes found in many marine teleosts. In this study, cesticillus (Molin, 1858) Looss, 1899 metacercariae were identified European hake ( Merluccius merluccius , Linnaeus, 1758) caught the Tyrrhenian Sea. encapsulated muscle, close to spine and gills. Out 131 specimens, 111 (P = 84.7%, mI 25.1 mA 21.3) infected by trematode metacercariae. Morphol...

Abstract Specific identification of oestrid larvae is usually problematic not only when using morphobiometric features, but also applying molecular criteria, since very few markers have been described for this group flies. New are needed more reliable species identification, diagnostic purposes, and epidemiological surveys; moreover, they can help in phylogenetic reconstruction. Here, we report...

The family Echinostomatidae Looss, 1899 exhibits a substantial taxonomic diversity, morphological criteria adopted by different authors have resulted in its subdivision into an impressive number of subfamilies. The status of the subfamily Echinochasminae Odhner, 1910 was changed in various classifications. Genetic characteristics and phylogenetic analysis of four Echinostomatidae species - Echi...

Adult tetraphyllidean tapeworms (Platyhelminthes: Eucestoda) from the spiral intestines of 3 species of potamotrygonid stingrays (Paratrygon aiereba, Potamotrygon castexi, and Portamotrygon motoro) in the Madre de Dios river in Peru were found to host numerous cysts embedded in their parenchymal tissues. Histological sections of the cysts revealed the presence of a scolex bearing 4 suckers and ...

In support of the hypothesis of the endosymbiotic origin of eukaryotes, much evidence has been found to support the idea that some organelles of eukaryotic cells originated from bacterial ancestors. Less attention has been paid to the identity of the host cell, although some biochemical and molecular genetic properties shared by archaea and eukaryotes have been documented. Through comparing 507...

South African clinids are a major component of the temperate intertidal regions that also known to participate in life cycles and transmission several groups parasites. However, knowledge trematode diversity these fishes is incomplete. In this study, two species Clinus Cuvier, super klipfish superciliosus (Linnaeus) bluntnose cottoides Valenciennes, were collected from six localities along coas...

R1 and R2 retrotransposable elements are stable components of the 28S rRNA genes of arthropods. While each retrotransposition event leads to incremental losses of rDNA unit expression, little is known about the selective consequences of these elements on the host genome. Previous reports suggested that in the abnormal abdomen (aa) phenotype of Drosophila mercatorum, high levels of rDNA insertio...

A new gregarious braconid parasitoid wasp of Euphorinae, Meteorus stellatus Fujie, Shimizu & Maeto sp. nov. , is described from the Ryukyu Islands in Japan, based on an integrative taxonomic framework. The phylogenetic position species within Meteorini was analyzed DNA fragments mitochondrial cytochrome c oxidase 1 (CO1) and nuclear 28S rDNA genes. recovered as a member versicolor compl...