Reassessment of the Phylogenetics of Two Pygmy Grasshopper Generic Groups Tetrix and Systolederus through Mitochondrial Phylogenomics Using Four New Mitochondrial Genome Assemblies.

Mitochondrial genomes offer pragmatic genetic markers to reconstruct evolutionary relationships and inform taxonomic classifications. Here, we present complete mitochondrial sequences for four Chinese pygmy grasshoppers (Tetrigidae), aiming to reevaluate phylogenetic patterns and morphological taxonomy. Our 17,643 bp, 16,274 bp, 15,086 bp, and 15,398 bp mitogenomes of Exothotettix guangxiensis, Formosatettix longwangshanensis, Euparatettix sinufemoralis and Systolederus zhengi, respectively, exhibit archetypal Tetrigidae architecture. We constructed phylogenies using 13 protein-coding loci from 39 Tetrigidae mitogenomes, revealing several genus-level clusters with statistically solid support, conflicts regarding Ex. guangxiensis, F. longwangshanensis merging into Tetrix, and two subclades of Systolederus. The dated divergence analysis indicates over 150 Mya of Tetrigidae ancestry, tracing the Systolederus generic group splits up to ~75 million years ago. Moreover, the Tetrix generic group radiated over 14 Mya across vast distributions, consistent with rapid adaptive dispersals. Our mitochondrial reconstructions suggest that Synstolederus is taxonomically overextended for a single genus, while the distinctiveness of Ex. guangxiensis and F. longwangshanensis from Tetrix appears questionable, and the Tetrix generic group comprises a potential tRNA-Ile coding region. Our integrative mitogenomic approaches will help resolve issues stemming from morphological taxonomy that is reliant on traits that are prone to convergence. This investigation enhances comprehension of Tetrigidae phylogeny and accentuates molecular systematics.

Review of the genus Formosatettix Tinkham (Orthoptera: Tetrigidae) with description of new taxa, new synonymy and an updated key to species.

The genus Formosatettix Tinkham is reviewed. Seven new species from China, Formosatettix cliva Deng, sp. nov., Formosatettix guangyuanensis Deng, sp. nov., Formosatettix shuimogouensis Deng, sp. nov., Formosatettix strictivertex Deng, sp. nov., Formosatettix tangjiaheensis Deng, sp. nov., Formosatettix yueqingensis Deng, sp. nov., Formosatettix zheminzhengi Deng, sp. nov. are described and illustrated. One new name is proposed: Formosatettix latifemurus Deng, nom. nov. One new combination is established: Formosatettix nyalamensis (Zheng & Lin, 2015), comb. nov. The following new synonyms are established: Bolivaritettix circocephalus Zheng, 1992 = Formosatettix torulosinota Zheng & Mao, 2002, syn. nov., Criotettix bispinosus (Dalman, 1818) = Formosatettix hainanensis Zheng, 2012, syn. nov., Epitettix guangxiensis (Zheng & Jiang, 1994) = Formosatettix guangxiensis Zheng & Jiang, 1998, syn. nov., Formosatettix longwangshanensis Zheng, 1998 = Formosatettix tianmushanensis Zheng & Li, 2001, syn. nov., Formosatettix serrifemora Deng, 2019 = Formosatettix wulongensis Zha & Ding, 2020, syn. nov., Formosatettix huapingensis Zheng & Jiang, 1997 = Formosatettix nanlingensis Zheng & Cao, 2011, syn. nov. = Formosatettix undulatifemura, Zheng, 2012, syn. nov. = Formosatettix guposhanensis Deng, 2019, syn. nov. In addition, Formosatettix leigongshanensis Zha & Ding, 2020 is briefly commented.

Description of a new species of the genus Pseudepitettix Zheng (Orthoptera: Tetrigoidea: Cladonotinae) from China.

Pseudepitettix convexa Deng, sp. nov. is described with detailed illustrations of external morphology. Comparison between new species and other species of the genus Pseudepitettix Zheng, 1995 is compiled into a table for identification. An updated key to species of the genus is given.

New species and new synonyms of Macromotettixoides (Orthoptera: Tetrigidae) with an updated key.

The genus Macromotettixoides Zheng, Wei Jiang, 2005 is reviewed. Four new species of the genus, M. daiyunshanensis Deng, sp. nov., M. curvicarina Deng, sp. nov., M. convexa Deng, sp. nov. and M. shengtangshanensis Deng, sp. nov. are described with detailed illustrations of external morphology. Two new synonyms are established: M. jinggangshanensis, syn. nov. is synonymized with M. jiuwanshanensis Zheng, Wei Jiang, 2005; M. parvula Zha Wen, 2017, syn. nov. is synonymized with M. undulatifemura Deng, Zheng Yang, 2012. Additionally, an updated key to species of the genus is given.

Significantly enhanced enzymatic hydrolysis of rice straw via a high-performance two-stage deep eutectic solvents synergistic pretreatment.

A two-stage deep eutectic solvents (DESs) treatment was shown to be an effective method for improving the utilization of certain DESs, and the specific order of pretreatment, such as malic acid/proline (MP) or choline chloride/oxalic acid (CO) during the first stage and choline chloride/urea (CU) during the second stage, resulted in better performance for enhancing the sugar yield due to the synergistic effect of the two DESs on biomass fractionation. Moreover, the presence of water during these processes could balance the loss of components by tuning the pretreatment severity, thus ensuring higher sugar yields. By eliminating the washing step after the first stage treatment, enhanced cellulose recovery and glucose yield were achieved for the CO-CU pretreatment in the presence of 5% water, and a simpler process was established with a glucose yield of 90.2% after a 3-h treatment at 100°C.