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In Patagonia (Argentina) in recent decades, the exotic species and hybrids of Salix alba–Salix fragilis complex has spread over wide areas along watercourses, taking advantage of it is sexually and vegetatively propagation. It outcompetes with native vegetation, facilitated by stochastic events related to large floods of long‐lasting duration higher than the average maximum of 186 m3/s for more than...
A new species of parasitic nematode, Hysterothylacium spirale sp. nov. (Ascaridoidea, Anisakidae), is described based on specimens collected from the intestine and pyloric caeca of the silvery john dory Zenopsis conchifer (Lowe) (Zeiformes, Zeidae), from the Argentinean Shelf (35°05′–40°46′S, 53°03′–58°07′W). Among the 66 valid species described so far in the genus, the new species most closely resembles...
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