• First detection of a highly invasive freshwater amphipod Crangonyx floridanus (Bousfield, 1963) in the United Kingdom.

      Mauvisseau, Quentin; Davy-Bowker, John; Bryson, David; Souch, Graham; Burian, Alfred; Sweet, Michael J.; University of Derby; Surescreen Scientifics Ltd; Freshwater Biological Association; Natural History Museum (Regional Euro-Asian biological Invasions Centre, 2018-12-05)
      The freshwater gammarid, Crangonyx floridanus, originates from North America but has invaded and subsequently spread rapidly throughout Japan. We provide here the first genetic and microscopic evidence that C. floridanus has now also reached the United Kingdom. We found this species in two locations separated by more than 200 km (Lake Windermere in the North of the UK and Smestow Brook, West Midlands). The current distribution of C. floridanus is currently unknown, however, both sites are well connected to other river and canal systems. Therefore, the chance of further spread is high. Genetic analyses of C. floridanus indicate that British inland waters are colonised by the same lineage, which invaded Japan. We recommend further work to assess the distribution of this species and its impact on the local fauna and flora.
    • Ophyiulus in Victoria: results of millipede surveys from south-eastern Australia

      Norton, Briony, A.; Thomson, Linda, J.; Nash; Michael A.; University of Sheffield; University of Melbourne (CSIRO, 2015-08-12)
      The composition and ecology of the millipede fauna of Victoria remain poorly understood. We collected millipedes as part of a series of ecological arthropod surveys across south-eastern Australia, focusing mainly on Victoria. These samples almost exclusively contained millipedes from the introduced order Julida. We pursued species identification of the julids when it became apparent there were species other than the well-recorded Ommatoiulus moreleti (Lucas, 1860) (Portuguese millipede) in the samples. The majority of specimens were O. moreleti, but we also detected at least one species of Cylindroiulus Verhoeff, 1894, as well as an Ophyiulus Berlese, 1884, species, specimens of which have been identified as Ophyiulus cf. targionii. These are the first Ophyiulus records for Victoria to our knowledge. We present preliminary data on the abundance through the year of Ophyiulus. This is the first study to examine this species in Victoria and little is currently known about its likely impact on agriculture or on native species. Monitoring and research of the species in the future is therefore warranted.