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The genus Ochosternus Candze, 1863 is revised for Lord Howe Island, with three species: O. howensis Lea, 1929, O. goodyeri new species and O. huttoni new species. The definition of Ochosternus is discussed in relation to similar Elaterinae in the region. An exotic pasture pest, Monocrepidius exsul Sharp, 1877, is noted as well-established on the island. Keys are provided for identification of the Ochosternus species and for the seven elaterid genera on Lord Howe Island.

The Gangetic Largetooth flounder, Pseudorhombus arsius (Hamilton, 1822), long treated as a single Indo-Pacific species, represents a cryptic species complex. Using a combination of morphological, morphometric, and molecular data, we discovered a distinct lineage that warrants recognition as Pseudorhombus bahudaensis sp. nov. Phylogenetic analyses of COI sequences revealed multiple polyphyletic clades, with two well-supported groups corresponding to P. arsius and the new species. Divergence dating indicates a separation of approximately 17 million years despite extensive morphological overlap. Diagnosis of the new species is supported by vertebral counts, subtle scale morphology, and differences in the position of the lateral line relative to the eye. These findings highlight the importance of integrating genetic and morphological evidence in resolving cryptic flounder complexes and provide a basis for re-evaluating distribution records attributed to P. arsius across the Indo-Pacific.

Brachodes norbertkeili sp. nov. is described based on specimens collected in Kyrgyzstan. This new species is related to Brachodes fallax (Staudinger, 1900), Brachodes staudingeri Kallies 1998 and allied taxa but it differs significantly in terms of its external appearance, particularly with regards to its extraordinary size and the extended cream suffusion of the forewing. Furthermore, the new species is separated from its congeners by its CO1 sequence. The adult and male genitalia of the new species are illustrated. The type locality is in a remote area, which is home to local endemism even in butterflies and several likely undescribed species from various families, suggesting long-lasting isolation.

Hadronotus omnistriatus Debnath, Rajmohana and Thirupam Reddy sp. nov. (Hymenoptera: Scelionidae) is described herein as new to science from India under the muscaeformis species group. The specimens were reared from eggs of a reduviid host (Hemiptera: Reduviidae). A detailed morphological description is provided, along with its DNA barcode data. A single gene-based molecular phylogenetic analysis on the mitochondrial cytochrome c oxidase I is presented to support the delineation of the new species. Additionally, a checklist of Hadronotus species reported from India is provided.

The species of Alcis Curtis,1826 in Xizang, China are reviewed, including Alcis linzhiensis Pan & Yu sp. nov., A. decussata (Moore, 1868), A. limbui Sato, 1994), A. sinadmissa (Wehrli, 1943), A. extinctaria (Eversmann, 1851), and A. maculata (Moore, 1868). The adult, and male and female genitalia of Alcis linzhiensis Pan & Yu sp. nov. are described in detail. Adult and genital images of the other five species of Alcis Curtis, 1826 are also provided.

A new species of Chauhanellus Bychowsky & Nagibina, 1969 is described from the gills of the Peruvian sea catfish, Galeichthys peruvianus Ltken (Siluriformes, Ariidae), collected from the Southern Pacific Ocean off the coast of Peru. The description of the new species is based on an integrative taxonomic approach, incorporating morphological data, 28S rDNA sequencing, and phylogenetic analysis. Chauhanellus peruvianus sp. nov. can be distinguished from all its congeners by possessing a tubular MCO with proximal and distal curvatures and a spear-shaped distal extremity, as well as an elongated, grooved accessory piece that is proximally expanded and distally hook-shaped. Phylogenetic analyses based on 28S rDNA sequences recovered C. peruvianus sp. nov. in a clade with C. boegeri Domingues & Fehlauer, 2006 and an unidentified Chauhanellus species from Genidens genidens (Cuvier), forming a well-supported Neotropical lineage. However, the genus Chauhanellus was recovered as non-monophyletic, with a separate Indo-Malayan lineage comprising seven species. The description of C. peruvianus sp. nov. represents the first record of Chauhanellus in the Southeastern Pacific and raises the number of species reported from South America and globally to eight and 32, respectively.

Caatinga is the major natural area of the northeastern region of Brazil, covering ca. 10% of the national territory. Coupling eight sampling expeditions between 2018 and 2021 and an extensive bibliographic survey, here we present a checklist of Pentatomidae from the Caatinga comprising 53 species. In total, we collected 43 species in four federal conservation units throughout the region, while records of ten additional species were recovered from the literature. Sixteen species are recorded for the first time in the Caatinga, and one new genus and species, Aridocoris guidonae gen. and sp. nov. are described. At least 10 species (18% of the records) are only known associated with the region or with adjacent areas.

Two new Docosia Winnertz speciesD. babale sp. nov. and D. dali sp. nov.are described from Georgia (Transcaucasia) based on both morphological and molecular characters. Both new species, described from singletons, belong to a species group characterised by details in the male terminalia: bifid gonostylus, prominent medial process bearing ramified setae at the posteroventral margin of the gonocoxites, and delimited lateral extensions of the posteroventral margin of the gonocoxite. An updated phylogenetic hypothesis of the genus Docosia based on four DNA markers (28S, ITS2, COI, COII) is proposed.

Recent orthopteran sampling was conducted by the authors in Pingtung County in the southern part of Taiwan. A new species of Taiyalia Yamasaki, 1992 is described: Taiyalia meridionalis sp. nov. We also report new locality records for: Leptoteratura taiwana Yamasaki, 1987, Neocyrtopsis (Neocyrtopsis) longicauda Chen & Wu, 2025, and Xizicus (Eoxizicus) taiwanensis Chang, Du & Shi, 2013; as well as Teratura (Teratura) cincta (Bey-Bienko, 1962) and Xiphidiopsis (Euxiphidiopsis) autumnalis (Gorochov, 1998) in Nantou County at the central part of Taiwan.