First Scandinavian Record of the Genus Speocyclops (Copepoda)
1991; Oxford University Press; Volume: 11; Issue: 1 Linguagem: Inglês
10.2307/1548554
ISSN1937-240X
AutoresDag O. Hessen, Fridtjof Stene,
Tópico(s)Isotope Analysis in Ecology
ResumoThe cave- and seepage-dwelling cyclopoid copepod Speocyclops demetiensis (Scourfield, 1932) has been recorded scattered throughout middle and southern Europe. In 1986 this species was identified in a small seepage pond near Kristiansund, western Norway. Since then, repeated records of both males and females have been made in two localities in the same area. These are the first reported finds of this species, and of the genus Speocyclops in Scandinavia, and the northernmost ever recorded. The geographical occurrence of this species over widely different climatic regions suggests that it has a remarkable phenotypic and ecological plasticity, and may be more common than hitherto recognized. A remarkable ecological adaptation is the absence of ovisacs and shedding of single eggs.
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