Front cover: A male of Callimedusa tomopterna calling from the branches above a pond in Tarapoto, Peru. This species is described from Peru and many populations throughout Amazonia have been identified using this taxon. However, the genetic distances among them, notably between Peru and the Guiana Shield suggest they belong to distinct species. A similar situation is found in many amazonian frogs. Photo credit: Antoine Fouquet. DOI: 10.1111/jbi.13847.

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封面：秘鲁塔拉波托的Callimedusa tomopterna的雄性从池塘上方的树枝上呼唤。从秘鲁描述了该物种，并使用该分类单元确定了整个亚马逊地区的许多种群。但是，它们之间的遗传距离，特别是秘鲁与圭亚那盾之间的遗传距离，表明它们属于不同的物种。在许多亚马逊青蛙中也发现了类似的情况。图片来源：Antoine Fouquet。DOI：10.1111 / jbi.13847。