Specimens belonging to the genus Leiodontocercus are rare or even absent in natural history museum collections; this is likely due to at least two reasons, notably, their relatively small size, and, the sheer difficulty in finding them in dense Afrotropical forests. Until recently, three species from less than fifteen specimens were known from this genus, whose identification relied on a singular diagnostic character, that is, the shape of the male cerci. The present contribution is based on the examination of thirty specimens collected from various countries, ranging from central to west Africa; apart from the male cerci, a second diagnostic character – the stridulatory file – is used to distinguish species, even though it is difficult to examine in mounted specimens. As a result, four new species were detected, namely, L. viciisp. nov., L. spinicercatussp. nov. (from the Central African Republic), L. muticussp. nov. (from Gabon and Cameroon) and L. philipporumsp. nov. (from Côte d’Ivoire). Moreover, L. condylus is recorded from the Central African Republic, the only country where three species of this genus co-occur. It is suggested that population isolation during fluctuating humid and dry periods, consequent to the influence of Ice Age impact during the Pleistocene in tropical central Africa, is the best explanation for the adaptive radiation of the group.

中文翻译：

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修订非洲热带 Leiodontocercus 属（直翅目、Tettigoniidae、Phaneropterinae），描述四个新物种。

属于 Leiodontocercus 属的标本在自然历史博物馆藏品中很少甚至没有；这可能至少有两个原因，特别是它们的体型相对较小，以及在茂密的非洲热带森林中很难找到它们。直到最近，从不到 15 个标本中得知该属的 3 个物种，其鉴定依赖于单一的诊断特征，即雄性尾蚴的形状。目前的贡献是基于对从中非到西非各个国家收集的 30 个标本的检查；除了雄性尾蚴之外，第二个诊断特征——颤音锉——用于区分物种，尽管很难在镶嵌标本中进行检查。结果，检测到四个新物种，即L. viciisp。十一月，L。刺猬 十一月 （来自中非共和国），L. muticussp。十一月 （来自加蓬和喀麦隆）和 L. philipporumsp。十一月 （来自科特迪瓦）。此外，L. condylus 来自中非共和国，这是该属的三个物种共同出现的唯一国家。有人认为，由于中非热带更新世期间冰河时代影响的影响，在潮湿和干燥波动期间的种群隔离是该种群适应性辐射的最佳解释。