2012 Fiscal Year Final Research Report
Extensive geographic variation of karyotypes and coloration in Gagrellula ferruginea species complex (Arachnida: Opiliones) accompanying circular overlaps
| Project/Area Number |
22570092
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Tottori University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Keywords | 種分化 / 輪状種 / 核型分化 / 環状重複 / ザトウムシ目 / 地理的変異 / 染色体 / B染色体 |
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| Research Abstract |
A Japanese harvestman Gagrellula ferruginea (Sclerosomatidae: Gagrellinae) shows circular overlaps at two different areas: (1) northwestern part of Chubu District along the Hida Mountains where two geographic races recognized by color, Hokuriku Race and Kanto Race, meet and make a narrow zone of overlap and (2) northeastern part of Shikoku Island (the Sanuki Mountains) where two forms representing both ends (2n=12 and 20) of a chain of chromosomal races (2n = 12/14/16/18/20) coexist without any indication of hybridization. We surveyed these circular overlaps of Gagrellula ferruginea in detail.
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