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Characteristics, distribution and ecology
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King, P.E. & G.B. Crapp, 1971. Littoral Pycnogonids of the British Isles. Field Studies, 3(3): 455-480.

Sars, G.O., 1891. Pycnogonidea. The Norwegian North-Atlantic Expedition, 1876-1878, XX: 1-163.

Nymphon gracile