Chromosomes of two species of Japanese fishflies in the genus <i>Parachauliodes</i> (Megaloptera: Corydalidae: Chauliodinae)

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  • Chromosomes of two species of Japanese fishflies in the genus Parachauliodes (Megaloptera: Corydalidae: Chauliodinae)

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We analyzed chromosomes of two species of Japanese fishflies (Megaloptera: Corydalidae: Chauliodinae), Parachauliodes continentalis and P. japonicus. The chromosome numbers in both species were 2n=20 consisting of 9 pairs of autosomes plus XX chromosomes in females and Xy in males. The X chromosomes were subtelocentric while the y was the smallest chromosome of the set. The sex chromosomes of first meiotic metaphase (MI) spermatocytes in both species invariably formed bivalents synchronously with the autosomes and formed parachute-type bivalents, suggesting that the species in this genus share a common sex bivalent mechanism.

Journal

  • Chromosome Science

    Chromosome Science 15 (1+2), 23-25, 2012

    THE SOCIETY OF CHROMOSOME RESEARCH

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