The Eastern common groundhopper, Tetrix japonica, is a pygmy grasshopper species widely distributed in the Eastern Palearctic region, and shows a high degree of phenotypic variation. The classification of Tetrix japonica is difficult and frequently involved errors. Among the many species of Tetrigidae that have been described in China within the last decades, many synonyms of Tetrix japonica were found. The type specimens of many species deposited in the Chinese museums have been re-examined and as a result, Tetrix japonica is systematically revised. Based on the results of this review, 23 new synonyms of Tetrix japonica are proposed: Coptotettix circinihumerus Zheng & Deng, 2004, syn. nov.; Coptotettix emeiensis Zheng, Lin & Zhang, 2012, syn. nov.; Euparatettix rongshuiensis Zheng, 2005, syn. nov.; Euparatettix zayuensis Zheng, Zeng & Ou, 2011, syn. nov.; Macromotettix nigritubercle Zheng & Jiang, 2006, syn. nov.; Macromotettix yaoshanensis Zheng & Jiang, 2000, syn. nov.; Tetrix albistriatus Yao & Zheng, 2006, syn. nov.; Tetrix albomaculatus Zheng & Jiang, 2006, syn. nov.; Tetrix albomarginis Zheng & Nie, 2005, syn. nov.; Tetrix cenwanglaoshana Zheng, Jiang & Liu, 2005, syn. nov.; Tetrix cliva Zheng & Deng, 2004, syn. nov.; Tetrix duolunensis Zheng, 1996, syn. nov.; Tetrix grossovalva Zheng, 1994, syn. nov.; Tetrix jiuwanshanensis Zheng, 2005, syn. nov.; Tetrix latipalpa Cao & Zheng, 2011, syn. nov.; Tetrix liuwanshanensis Deng, Zheng & Wei, 2007, syn. nov.; Tetrix qinlingensis Zheng, Huo & Zhang, 2000, syn. nov.; Tetrix rectimargina Zheng & Jiang, 2004, syn. nov.; Tetrix ruyuanensis Liang, 1998, syn. nov.; Tetrix xianensis Zheng, 1996, syn. nov.; Tetrix xinchengensis Deng, Zheng & Wei, 2007, syn. nov.; Tetrix yunlongensis Zheng & Mao, 2002, syn. nov.; Tetrix zhoushanensis Gao, Liu & Yin, 2022, syn. nov. It is expected that there will be the discoveries of more synonyms of this and other Tetriginae species from the Eastern Palearctic.

Ferns represent the second-largest group of vascular plants, yet their genomic resources lag far behind. Here, we present a chromosome-scale genome assembly of Cibotium barometz (L.) J. Sm., a medicinally important fern species. The 3.49 Gb genome, assembled into 66 chromosomes with 99.41% sequence anchorage, revealed an exceptionally high proportion (83.93%) of repetitive elements, dominated by recently expanded LTR retrotransposons. We identified 30,616 protein-coding genes, providing insights into fern-specific gene families. Genomic analyses uncover the evolutionary dynamics of 513 key biosynthetic genes, particularly those involved in terpenoid and flavonoid production. Expression profiling across tissues revealed tissue-specific regulation of these pathways, with notable upregulation of chalcone synthase genes in roots. Our structural analysis of 1-deoxy-d-xylulose-5-phosphate synthase, a key enzyme in terpenoid biosynthesis, demonstrated high conservation across land plants while highlighting fern-specific adaptations. The identification of multiple isoforms for key enzymes points to potential gene-duplication events or the evolution of fern-specific variants. This genome provides a foundation for understanding fern biology, evolution, and the molecular basis of their medicinal properties. It also offers valuable resources for conservation efforts and pharmacological research, paving the way for sustainable utilization of this valuable medicinal plant and advancing our understanding of plant diversity and natural product biosynthesis.