ABSTRACT

Tudivasum Rosenberg & Petit, 1987 is a morphologically distinct gastropod genus of low diversity. All but one species are known from Australia and they occur from the intertidal zone down to hundreds of metres on the continental shelf. These carnivorous gastropods are thought to have intracapsular development. The six currently recognized extant species are reviewed here and their geographical ranges clarified. Two new species, Tudivasum chaneyi n. sp. and T. ashmorense n. sp., are described from Ashmore Reef, Western Australia, and are characterized by differences in protoconch colour and shell sculpture. The third new species, T. westrale n. sp., is described from the mid-west coast of Western Australia, where it has long been misidentified as T. spinosum (H. Adams & A. Adams, 1864). We generated a molecular phylogeny based on mitochondrial DNA sequence data to test morphological species concepts and reconstruct relationships among four of the described species. High levels of divergence within one of the new species could indicate an additional cryptic species.

中文翻译：

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回顾现存的Tudivasum Rosenberg＆Petit，1987（Neogastropoda：Turbinellidae）并描述了来自西澳大利亚州的三个新物种

摘要

Tudivasum Rosenberg＆Petit，1987是形态上截然不同的腹足动物属，多样性低。除了一种外，其他物种都从澳大利亚已知，它们发生在潮间带，直到大陆架上数百米。这些食肉腹足动物被认为具有囊内发育。这里对目前公认的六个现存物种进行了审查，并阐明了其地理范围。两个新种，Tudivasum chaneyi n。sp。和T. ashmorense。由西澳大利亚州的阿什莫尔礁（Ashmore Reef）进行描述，其特征是原生螺帽的颜色和贝壳雕塑的差异。第三新种，T。westrale n。sp。，是从西澳大利亚州中西部海岸描述的，长期以来一直被误认为是T. spinosum（H. Adams＆A.Adams，1864）。我们基于线粒体DNA序列数据生成了分子系统发育树，以测试形态物种的概念并重建四个所述物种之间的关系。一个新物种中的高度差异可能表明存在另一个隐性物种。