63 research outputs found
Morphological and Molecular Evolution Are Not Linked in Lamellodiscus (Plathyhelminthes, Monogenea)
Lamellodiscus Johnston & Tiegs 1922 (Monogenea, Diplectanidae) is a genus of common parasites on the gills of sparid fishes. Here we show that this genus is probably undergoing a fast molecular diversification, as reflected by the important genetic variability observed within three molecular markers (partial nuclear 18S rDNA, Internal Transcribed Spacer 1, and mitonchondrial Cytochrome Oxidase I). Using an updated phylogeny of this genus, we show that molecular and morphological evolution are weakly correlated, and that most of the morphologically defined taxonomical units are not consistent with the molecular data. We suggest that Lamellodiscus morphology is probably constrained by strong environmental (host-induced) pressure, and discuss why this result can apply to other taxa. Genetic variability within nuclear 18S and mitochondrial COI genes are compared for several monogenean genera, as this measure may reflect the level of diversification within a genus. Overall our results suggest that cryptic speciation events may occur within Lamellodiscus, and discuss the links between morphological and molecular evolution
A phylogeny of Cichlidogyrus spp. (Monogenea, Dactylogyridea) clarifies a host-switch between fish families and reveals an adaptive component to attachment organ morphology of this parasite genus
Effect of dietary supplementation with propolis and Aloe barbadensis extracts on hematological parameters and parasitism in Nile tilapia
Deep-water parasite diversity in Lake Tanganyika: description of two new monogenean species from benthopelagic cichlid fishes
Die Morphogenese der chitinoiden Teile des Haptors bei Gyrodactylus Decorus Malmberg, 1956 (Monogenoidea) und ihre morphologisch-Metrische Variabilit�t
Pathogenic infections of Gyrodactylus brachymystacis (Monogenea) on Oncorhynchus mykiss (Walbaum) at a fish farm in the Qinling Mountain region of China
Gyrodactylus anarhichatis Mo & Lile (Monogenea: Gyrodactylidae) infection of farmed spotted wolffish, Anarhichas minor Olafsen, in Iceland
Infestations of Atlantic salmon, Salmo salar, by Gyrodactylus salaris in Norwegian rivers
The intestinal parasite Pseudocapillaria tomentosa (Dujardin, 1843) of the invasive fish species topmouth gudgeon, Pseudorasbora parva (Temminck and Schlegel), in Slovakia
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