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Grassé, P.P. (1978). Existence de deux formes sexuelles males chez le Copepode ascidicole Notodelphyidae Pachypygus gibber (Thorell, 1859). [Existence of two male sexual forms in the ascidicolous Copepod Notodelphyidae Pachypygus gibber (Thorell, 1859).]. Comptes Rendus de l'Académie des Sciences, Paris. 287:253-256, figs.a-e.
Grassé, P.P. (1978). Existence de deux formes sexuelles males chez le Copepode ascidicole Notodelphyidae Pachypygus gibber (Thorell, 1859). [Existence of two male sexual forms in the ascidicolous Copepod Notodelphyidae Pachypygus gibber (Thorell, 1859).]. Comptes Rendus de l'Académie des Sciences, Paris. 287:253-256, figs.a-e.
