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Lepidurus arcticus in the Irish Late-Glacial


THE recent discovery of a fine suite of Late-glacial strata near Ballyhalbert on the north-eastern Irish coast in an accessible position has allowed a careful study to be made of the different layers for plant and animal macrofossils. Particularly interesting has been the recovery of numerous characteristic telsons of the freshwater notostracan Lepidurus arcticus, a species which was reported recently by Mitchell1 from Late-glacial levels at Ballaugh in the Isle of Man, at Neasham, Co. Durham, and at Mapastown, Co. Louth. Records from these Late-glacial contexts are significant since the species is not known in the present fauna of the British Isles. Its modern distribution is circumpolar, between 65° and 80° N.

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  1. 1

    Mitchell, G. F., Nature, 180, 513 (1957).

  2. 2

    Godwin, H., “The History of the British Flora” (Cambridge, 1956).

  3. 3

    Deevey, E. S., jun., Mem. Ist. Ital. Idrobiol., suppl. 8, 9–38 (1955).

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