Abstract
In this study, we describe and illustrate a new species of the genus Laena Dejean, 1821, Laenacostata sp. nov., which was collected in Micangshan Nature Reserve of Sichuan Province, China. Additionally, the COI mitochondrial gene was sequenced to provide additional evidence for this new species' validity. The results of phylogenetic analyses suggest that this new species is sister to L.maowenica Schawaller, 2008. Furthermore, an updated key to Laena species from Sichuan Province is provided.