Complete chloroplast genome of Herpetineuron toccoae (Sull. & Lesq.) Cardot, a winter host of gall aphids inducing the formation of Galla chinensis

Bryophytes constitute a fundamental component of many ecosystems worldwide. In China, certain bryophyte species serve as key winter hosts for gall aphids that induce the formation of Galla chinensis, an important resource in traditional Chinese medicine. Here, we sequenced and characterized the complete chloroplast genome of Herpetineuron toccoae (Sull. & Lesq.) Cardot. The chloroplast genome is 124,934 bp in length and exhibits a typical quadripartite structure, comprising a large single-copy region (87,005 bp), a small single-copy region (18,465 bp), and two inverted repeats (9,732 bp each). The overall GC content is 28.5%. The genome encodes 126 genes, including 80 protein-coding genes, 37 transfer RNA genes, eight ribosomal RNA genes, and one pseudogene. Phylogenetic analysis placed H. toccoae within a clade of pleurocarpous mosses with high bootstrap support. This chloroplast genome provides a valuable resource for phylogenetic and evolutionary studies of the genus Herpetineuron.