Although there is scientific consensus on most of the major biogeographic regions in the world, the demarcation of the area connecting Southeast Asia with Australia and Oceania remains debated. Two candidate boundaries potentially explain faunistic diversity patterns in the regions: Lydekker’s and Wallace’s lines. The islands in between both ‘lines’ are jointly termed Wallacea, with Sulawesi as the largest landmass. We surveyed Dacini fruit flies (Tephritidae: Dacinae) in Sulawesi between 2016 and 2019 using traps baited with male lures, resulting in 4,517 collected flies. We identified all specimens to species level, which adds 15 new species records to the island, bringing the total number of Dacini species in Sulawesi to 83. The biogeographic affinity of species in the updated checklist reveals a strong connection with former ‘Sunda’ (41% of species); validating Lydekker’s line, but also a high level of endemism (47% of species), confirming the uniqueness of Wallacea as a biogeographic region. We further describe a new species, Bactrocera (Bactrocera) niogreta Doorenweerd, sp. nov. and discuss the taxonomy of several interesting species.

中文翻译：

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苏拉威西岛（Sulawesi）的达西尼（Dacini）果蝇动物区系符合利德克（Lydekker）的品系，但也支持华莱士（Wallacea）作为生物地理区域（双翅目，T科）

尽管在世界上大多数主要的生物地理区域上已达成科学共识，但连接东南亚与澳大利亚和大洋洲的区域划分仍存在争议。有两个候选边界可能解释了该地区的主义多样性模式：Lydekker氏和Wallace氏线。两条“线”之间的岛屿合称为华莱士，苏拉威西岛是最大的陆地。我们使用诱饵诱捕的雄性诱饵对苏拉威西岛2016年至2019年的达西尼果蝇（Tephritidae：Dacinae）进行了调查，共收集到4,517只果蝇。我们在物种级别上鉴定了所有标本，从而为该岛增加了15个新物种记录，从而使苏拉威西岛上的达西尼物种总数达到83个。更新清单中物种的生物地理亲和力表明与先前的“ Sunda”（物种的41％）有很强的联系；不仅验证了Lydekker的血统，而且也证实了其高水平的特有性（占物种的47％），从而确认了华莱士州作为生物地理区域的独特性。我们进一步描述了一个新物种，Bactrocera（Bactrocera）niogreta Doorenweerd，sp。十一月 并讨论几种有趣物种的分类。