Abstract
Observations were made of the chromosomes of the burrowing barnacle Trypetesa lampas (Hancock). A method of squash preparation was used, which incorporated staining the material in a solution of 2% orcein in 45% acetic acid. The diploid number of chromosomes of T. lampas was found to be 12 and the haploid number 6, in both males and females. No obvious chromosomal mechanism of sex determination was found. There was, therefore, no cytogenetic confirmation of Kühnert's view (1934) that the sex of the larva is predetermined genetically. During mitosis in the females and embryos of Trypetesa lateralis Tomlinson and Kochlorine floridana Wells and Tomlinson, the diploid number of chromosomes was found to be about 14. The numbers of chromosomes in the 3 species of Acrothoracica studied were approximately half those observed in all 12 species of Thoracica and all 5 species of Rhizocephala previously investigated.
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Communicated by J. E. Smith, Plymouth
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White, F. The chromosomes of Trypetesa lampas (Cirripedia, Acrothoracica). Marine Biology 5, 29–34 (1970). https://doi.org/10.1007/BF00352490
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DOI: https://doi.org/10.1007/BF00352490