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COMPARATIVE MORPHOLOGY OF COMPLEMENTAL MALES IN FOUR SPECIES OF BALANUS (CIRRIPEDIA THORACICA) 1) BY PATSY A. MCLAUGHLIN Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Florida, U.S.A. and DORA P. HENRY Department of Oceanography, University of Washington, Seattle, Washington, U.S.A. The occurrence of dwarf or complemental males in the Thoracica, first discovered by Darwin (1851), has been described in several genera of the Lepadomorpha (e.g., Pilsbry, 1908; Broch, 1922; Nilsson-Cantell, 1931; Utinomi, 1958). The Balanomorpha, however, were believed to be exclusively hermaphroditic until the recent discovery of complemental males in a species of Balanus (Henry & McLaughlin, 1967). Three additional species of Baldrau.r have since been found to have complemental males: Balanus galeatus (Linn6) discovered by Dr. Victor A. Zullo, Calanus calceolus Darwin and Balanus merrilli Zullo found by one of the authors (PMcL). The full extent of this reproductive phenomenon in the Balanomorpha will not be known until it is possible to examine, in detail, the less common species possessing the convex rostrum apparently characteristic of balanids with complemental males. However, the morphology of the known males indicates significant parallels with the progressive degeneration seen in males of the Lepadomorpha. Several authors, following the example
Crustaceana – Brill
Published: Jan 1, 1972
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