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      Unusual arrangement and behaviour of the sex chromosomes of Aphodius (Agolius) abdominalis Bonelli, 1812, and comparison with A. (A.) bonvouloiri Harold, 1860 (Coleoptera: Aphodiidae)

      Comparative Cytogenetics

      Pensoft Publishers

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          Abstract

          Aphodius abdominalis Bonelli, 1812 is shown to have a karyotype comprising nine pairs of autosomes and sex chromosomes which are X0 (male), XX (female). At first metaphase of meiosis the X chromosome is linked to an autosomal bivalent by a darkly staining area of the cytoplasm, resembling the Xy p arrangement typical of Aphodius species, but giving nine, rather than 10, elements in the nucleus. C-banding, which shows the centromeres, confirms this unusual arrangement. A. bonvouloiri, the only other known species of subgenus Agolius Mulsant et Rey, 1869, has a male karyotype with nine pairs of autosomes and Xy sex chromosomes. No preparations of its meiosis are available.

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          Journal
          Comparative Cytogenetics
          CCG
          Pensoft Publishers
          1993-078X
          1993-0771
          December 29 2009
          December 29 2009
          : 3
          : 2
          : 91-96
          Article
          10.3897/compcytogen.v3i2.15
          © 2009
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