Seven new species of Tortanus ( Atortus ) (Copepoda, Calanoida, Tortanidae) from North Sulawesi, Indonesia

Seven new species of the planktonic copepod genus and subgenus Tortanus ( Atortus ) are described from North Sulawesi, Indonesia. Four of these species, T. ( A. ) indonesiensis , T. ( A. ) omorii , T. ( A. ) processus and T. ( A. ) lukmani , belong to the brevipes species complex sensu Ohtsuka & Kimoto (1989). Two species, T. ( A. ) sulawesiensis and T. ( A. ) manadoensis , can be placed in the recticauda species complex. The seventh species, however, T. ( A. ) bilobus , belongs to neither group, which will necessitate a revision of the current morphology-based grouping with the aid of a genetically-based phylogeny. The co-occurrence of multiple closely-related congeners in a relatively small area suggests possible microhabitat segregation among these species.

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