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Map of the sites holding the search term ""Riolus subviolaceus""

There are 4 sites that mention "Riolus subviolaceus".

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River Teme

…nd rare riffle beetle community, with some 17 species being recorded. Of these, Riolus nitens is classed as Vulnerable, with Macronychus quadrituberculatus being nationally rare. The nationally scarce beetles Riolus subviolaceus and Riolus cupreus are found in the channel, with t…

River Test

…Rhagionid fly RDB3, the nationally scarce riffle beetles Oulimnius troglodytes, Riolus cupreus and Riolus subviolaceus and the alderfly Sialis nigripes which is mainly northern and western in distribution. Many of the nineteen species of mayfly noted are local in distribution. Ot…

River Itchen

… Gyraulus albus and Theodoxus fluviatilis. Two nationally scarce rifle beetles, Riolus cupreus and Riolus subviolaceus, both of which occur in moderately flowing water on stones and in vegetation, have been recorded. Two species of caddis fly of nationally scarce status occur, Me…

River Lugg

…d conditions. The nationally scarce species present include two aquatic beetles Riolus cupreus and Riolus subviolaceus which live on stones in flowing water, and the alderfly Sialis nigripes, a species with an aquatic larva living in silts in large river systems. A range of mayfl…

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