Two species of Drepanopus Brady (Copepoda Calanoida) with discrete ranges in the Southern Hemisphere

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Abstract
Morphological features, distributional records and developmental stages of Drepanopus pectinatus Brady and D. forcipatus Giesbrecht indicate their close relationship but also corroborate the validity of their states as separate species with discrete ranges. D. pectinatus lives in inshore waters of the Crozet, Kerguelen and Heard Islands, south of the Antarctic Convergence. D. forcipatus occurs along both the Pacific and thc Atlantic coasts of southern South America and around South Georgia. The distribution of the species in the former region, which includes the Falkland Islands, appears to be related to the extent of the continental shelf and of the sub-Antarctic water; South Georgia lies south of the Antarctic Convergence. Significant morphometric differences between both populations of D. forcipatus were found.

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