By employing comparative morphology and anatomy as well as mitochondrial phylogenetics, we have identified three species of Landouria Godwin-Austen, 1918 in Timor-Leste. One of these species is identified as L. cf winteriana (Pfeiffer, 1842), a species originally described from Java, but considered widespread throughout the Indonesian archipelago. The two other species are newly described as L. timorensis n. sp. and L. montana n. sp., respectively. Landouria timorensis n. sp. is similar to L. winteriana, but differs by a smaller shell and details of its penial morphology. Landouria montana n. sp. is only found at higher altitudes and is readily distinguishable by its distinctive shell. A mitochondrial phylogeny reveals L. omphalostoma from Yunnan as the sister lineage of all Sunda Islands species. Based on this observation, we maintain the systematic placement of the Sunda Islands species in Landouria despite some minor differences in their genital anatomy. Furthermore, our phylogeny demonstrates that the East Asian genus Aegista Albers, 1850 is the probable sister taxon of Landouria. However, we reject the proposal by Hirano et al. ([2014] Substantial incongruence among the morphology, taxonomy, and molecular phylogeny of the land snails Aegista, Landouria, Trishoplita, and Pseudobuliminus (Pulmonata: Bradybaenidae) occurring in East Asia. Molecular Phylogenetics and Evolution 70, 171–181) to synonymise both genera based on their markedly distinct reproductive anatomy.

通过采用比较形态学和解剖学以及线粒体系统发育学，我们在东帝汶确定了1918年的Landouria Godwin-Austen三种。这些物种之一被鉴定为L. cf winteriana（Pfeiffer，1842），该物种最初是从爪哇描述的，但被认为在整个印度尼西亚群岛广泛分布。另两个物种新近被描述为L. timorensis n。sp。和L.蒙大拿ñ。分别。Landouria timorensis ñ。sp。与L. winteriana相似，但壳较小，但其阴茎形态不同。蒙大拿州兰杜里亚。sp。仅在较高的海拔发现，并且容易被其独特的外壳区分开。线粒体系统发育显示云南的乳杆菌（L. omphalostoma）是Sun他群岛所有物种的姊妹谱系。基于此观察结果，尽管生殖器解剖结构存在一些细微差别，但我们仍将the他群岛物种保持在兰杜里亚的系统放置。此外，我们的系统进化论表明，东亚属Aegista Albers（1850年）可能是Landouria的姊妹分类群。但是，我们拒绝了Hirano等人的提议。（[2014]的形态，分类，和分子的土地系统发育中实质性不一致性蜗牛盾蜗牛属，发生在东亚的Landouria，Trishoplita和Pseudobuliminus（Pulmonata：Bradybaenidae）。分子系统发育与进化（Molecular Phylogenetics and Evolution）70，171–181）基于这两个属的明显不同的生殖解剖结构将它们作为同义词。