Biogeographical History and Morphological Evolution of Two Closely Related Ostracod Species, Ishizakiella Ryukyuensis and I. Miurensis

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説明

Abstract Individuals of the brackish water ostracod species Ishizakiella ryukyuensis are found sympatrically with those of the closely related species I. miurensis at the Kii Peninsula, western Japan, and possess a projection on the male copulatory duct. By contrast, individuals of this species recovered from the Nansei Islands, southern Japan, do not have such a projection. Molecular phylogenetic trees based on mitochondrial COI sequences consistently indicated that the populations at the Nansei Islands formed a paraphyletic group outside of a cluster consisting of the population at the Kii Peninsula. Thus, the development of the projection in the male copulatory organ is considered as a derived character for the individuals at the Kii Peninsula, and this feature may have been brought about by the sympatric distribution and a process of character displacement.

収録刊行物

詳細情報 詳細情報について

  • CRID
    1873398392648255744
  • DOI
    10.1651/c-2345
  • ISSN
    1937240X
    02780372
  • データソース種別
    • OpenAIRE

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