Geographic Variation of Chromosomes and External Morphology in the montanum-subgroup of the Leiobunum curvipalpe-group (Arachnida, Opiliones, Phalangiidae) with Special Reference to Its Presumable Process of Raciation(Taxonomy)

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概要

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• The montanum-subgroup of the Leiobunum curvipalpe-group (Opiliones, Phalangiidae, Leiobuninae) is revised based on analyses of external morphology, genitalia, and karyotypes. The constituents of this subgroup are regarded as a single polytypic species, L. montanum Suzuki, comprised of six geographic races. Leiobunum virgeum Suzuki is considered as a synonym of L. montanum. Five of the races were chromosomally surveyed. It was found that karyotypes of these races exhibit a wide range of variation in chromosome number from 2n=18 to 26. Component chromosomes in these karyotypes were invariably meta- or submetacentric in structure. Therefore, this numerical variation cannot be ascribed to Robertsonian rearrangement alone. Presumable process of raciation in this species is presented. My interpretation of the spatial patterns of geographic variation in this species is in accordance with the stasipatric model of speciation.

• 社団法人日本動物学会の論文
• 1985-10-15

著者

• Tsurusaki N

  Hokkaido Univ.

• Tsurusaki Nobuo

  Zoological Institute Faculty Of Science Hokkaido University

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• Geographic Variation of Chromosomes and External Morphology in the montanum-subgroup of the Leiobunum curvipalpe-group (Arachnida, Opiliones, Phalangiidae) with Special Reference to Its Presumable Process of Raciation(Taxonomy)
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