Extensive geographic variation of karyotypes and coloration in Gagrellula ferruginea species complex (Arachnida: Opiliones) accompanying circular overlaps

一名日本收割者在两个不同的区域显示出环形重叠：(1)日本中部地区的西北部沿日田山脉，两个由颜色识别的地理种族，北国种族和关东种族，相遇并形成一个狭窄的重叠区；(2)四国岛东北部(三木山脉)，代表染色体小种链(2n=12/14/16/18/20)的两端(2n=12和20)的两种形式共存，没有任何杂交迹象。我们详细地调查了这些圆形重叠的铁锈菌。

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.