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Roberts, L.S. (1969). Ergasilus arthrosis n. sp. (Copepoda: Cyclopoida) and the taxonomic status of Ergasilus versicolor Wilson, 1911, Ergasilus elegans Wilson, 1916, and Ergasilus celestis Mueller, 1936, from North American fishes. Journal of the Fisheries Research Board of Canada 26:997-1011, figs. 1-29, tabs. 1-3. (iv-1969)
Roberts, L.S. (1969). Ergasilus arthrosis n. sp. (Copepoda: Cyclopoida) and the taxonomic status of Ergasilus versicolor Wilson, 1911, Ergasilus elegans Wilson, 1916, and Ergasilus celestis Mueller, 1936, from North American fishes. Journal of the Fisheries Research Board of Canada 26:997-1011, figs. 1-29, tabs. 1-3. (iv-1969)