Ryuyo Insect Nature Observation Park, Iwata, Shizuoka 438-0214, Japan,
Center for Molecular Biodiversity Research, National Museum of Nature and Science, Tsukuba 305-0005, Japan.
Zoolog Sci. 2021 Feb;38(1):90-102. doi: 10.2108/zs200048.
Two new species of the cockroach genus Hebard, 1929 from the Nansei Islands in Southwest Japan were compared to two closely related congeners, Asahina, 1971 and (Walker, 1868). Yanagisawa, Sakamaki, and Shimano sp. nov. from Yonaguni-jima Island was characterized by an overall length of 12.5-14.5 mm in males. The dorsal side of the male abdomen was entirely dark purple and there was an obscure orange band running down the middle of the tegmen. Yanagisawa, Sakamaki, and Shimano sp. nov. was characterized by an overall length of 12.0-13.0 mm in males and a distinct orange band running down the middle of the tegmen. , , and the population of were divided into four lineages in a maximum-likelihood tree generated from a dataset concatenated from five (two nuclear, 28S rRNA, histone H3, and three mitochondrial, COII, 12S rRNA, 16S rRNA) genes. We recognized the three Japanese lineages , , and as distinct species, which were also supported by the pairwise genetic distances (5.4-7.8%, K2P) of the COI sequences. Morphometric analysis was performed on the genitalia. A principal component analysis plot revealed that the sizes of the genitalia in the three Japanese species were similar to each other and smaller than that of the population of . The analysis also revealed that the three Japanese species were distinguished from each other by combinations of the sizes of L3 and L7 sclerites and the shape of R2 sclerite, with some overlapping exceptions.
两种来自日本西南琉球群岛那霸岛的新蟑螂属种（Hebard, 1929）与两种亲缘关系密切的近缘种（Asahina, 1971 和（Walker, 1868））进行了比较。雄性体长 12.5-14.5 毫米的新种（Yanagisawa, Sakamaki 和 Shimano sp. nov.）的腹部背面呈全深紫色，并有一条模糊的橙色带沿前翅的中脉向下延伸。雄性体长 12.0-13.0 毫米，前翅中央有一条明显的橙色带的新种（Yanagisawa, Sakamaki 和 Shimano sp. nov.）。基于 5 个基因（2 个核基因、28S rRNA、组蛋白 H3 和 3 个线粒体基因 COII、12S rRNA、16S rRNA）联合数据集构建的最大似然树将、和种群分为四个谱系。我们将三个日本谱系、和识别为不同的物种，COI 序列的成对遗传距离（5.4-7.8%，K2P）也支持这一观点。对生殖器进行了形态测量分析。主成分分析图显示，三个日本物种的生殖器大小彼此相似，且小于的种群。该分析还表明，三个日本物种通过 L3 和 L7 板的大小组合以及 R2 板的形状来区分彼此，存在一些重叠的例外情况。
