Morphological differences between two closely related sea urchin species, Strongylocentrotus droebachiensis and S. pallidus, in northern Norway (Echinodermata, Echinoidea)

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Wim Vader
Bjørn Sture Hagedal Pedersen
Sunniva Lønning

Abstract

Using material from a mixed population in northern Norway, it is shown that the two sea urchin taxa Strongylocentrotus droebachiens (O.F. Muller) and S. pallidus (G.O. Sars) are independent, although closely related species, that are fairly easy to tell apart also by morphological criteria. In this mixed population there is a significant difference in relative lantern size, with S. pallidus having much bigger lanterns. The difference is especially pronounced in large specimens.

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How to Cite
Vader, W., Hagedal Pedersen, B. S., & Lønning, S. (1986). Morphological differences between two closely related sea urchin species, Strongylocentrotus droebachiensis and S. pallidus, in northern Norway (Echinodermata, Echinoidea). Fauna Norvegica, 7, 10-14. https://doi.org/10.5324/fn.v7i0.6098
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