Ex Uno Plures? Morphotype and Lineage Diversity of Bothriocephalus (Cestoda: Bothriocephalidea) in North American Freshwater Fishes
| Autor: | Anindo Choudhury, Tomáš Scholz |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Canada
Cestoda Johnny darter Zoology Micropterus Fresh Water Biology DNA Ribosomal Lepomis Goldeye Fish Diseases Ambloplites rupestris RNA Ribosomal 18S Animals Ecology Evolution Behavior and Systematics Centrarchidae Likelihood Functions Base Sequence Fishes biology.organism_classification Cestode Infections United States Perciformes Etheostoma Perches Microscopy Electron Scanning Parasitology Sequence Alignment |
| Zdroj: | The Journal of parasitology. 106(5) |
| ISSN: | 1937-2345 |
| Popis: | Morphological and molecular evaluation of tapeworms of the genus Bothriocephalus Rudolphi, 1808 (Cestoda: Bothriocephalidea), based on newly collected and uniformly fixed worms from freshwater fishes in Canada and the United States has revealed unexpected diversity. With a combination of selected morphological features and 4 molecular markers (18S rDNA V8 region, ITS1, ITS2, and COI gene sequences), the following morphotypes and lineages of the Bothriocephalus cuspidatus Cooper, 1917 complex were identified, several of which are specific to their respective fish definitive hosts and may represent separate species: B. cuspidatus sensu stricto from walleye, Sander vitreus (type host), which likely includes a miniature morphotype from Johnny darter, Etheostoma nigrum (both Percidae); Bothriocephalus morphotype from pumpkinseed, Lepomis gibbosus (Centrarchidae); and Bothriocephalus morphotype from rock bass, Ambloplites rupestris (Centrarchidae). The Bothriocephalus morphotype from goldeye, Hiodon alosoides (Hiodontidae), may also represent a separate lineage (possibly Bothriocephalus texomensisSelf, 1954) but requires additional studies. A morphotype from smallmouth bass, Micropterus dolomieu, based on a single specimen, is morphologically and genetically very similar to the morphotype from rock bass. Morphological study of the scolex and strobila of heat-killed and fixed specimens has revealed consistent differences, often subtle, that allowed us to differentiate between these morphotypes. |
| Databáze: | OpenAIRE |
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