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A new genus of the tribe Opsiini (Hemiptera, Cicadellidae, Deltocephalinae), Odonaellus gen. nov. and two new species, O.serratus sp. nov. (type species) and O.expansus sp. nov., are described and illustrated; they are placed in the subtribe Eremophlepsiina. A key to subtribes and genera of Chinese Opsiini is provided. The type specimens of the new species are deposited in the Institute of Entomology, Guizhou University, Guiyang, China (GUGC).

Agathomerus Lacordaire and A.pulcher Lacordaire are redescribed, and three new species of the genus are described: Agathomerusmagdalenae sp. nov., A.espinosaorganistai sp. nov., and A.santiagoi sp. nov. Illustrations of the habitus, aedeagus and spermatheca of the four species are provided. Agathomerusbichito Monrós, A.batesi Baly, and A.superbus Pic are proposed as new synonyms of Agathomeruspulcher Lacordaire.

A new species of deepwater tilefish, Branchiostegussanae sp. nov., is described based on five specimens collected from the area between the Xisha Islands and Hainan Island, China. This species can be distinguished from congeners by its unique cheek marker and a combination of characteristics. Among the tilefish species known to be distributed in the South China Sea, this species is the only one with vertical stripes on the body. Based on the COI, CytB, and 12S sequences, a maximum-likelihood phylogenetic tree shows that the B.sanae sp. nov. forms a separate clade and is the sister group to the clade consisting of B.sawakinensis, B.albus, B.argentatus, B.biendong, B.japonicus, B.auratus, and B.okinawaensis. A key to the genus Branchiostegus is also compiled.

Microgastrinae is a megadiverse subfamily of wasps in the family Braconidae. As parasitoids of caterpillars, members of the subfamily play important roles in regulating native caterpillar populations, and several species are used commercially as biological control agents. The genus Apanteles comprises a large portion of total microgastrine diversity, however it has not been studied in Australia for more than 30 years, with only nine described species previously known from the continent. We explore the diversity and systematics of Apanteles in Australia, using cytochrome c oxidase subunit I (COI) and Wingless (wg) DNA barcodes from more than 400 Australian Apanteles specimens. Using molecular species delimitation in combination with reduced morphological diagnoses, at least 48 distinct molecular lineages of Apanteles are confirmed in Australia, and 34 new species are formally described, all authored by Slater-Baker, Fagan-Jeffries, Fernández-Triana, Portmann & Oestmann: A.adustus, A.aeternus, A.alatomicans, A.allapsus, A.amicalis, A.apollo, A.apricus, A.artemis, A.aurantius, A.auroralis, A.banrock, A.breviflagellarius, A.brockhedgesi, A.cuprum, A.darthvaderi, A.doreenwatlerae, A.ethanbeaveri, A.fenestrinus, A.ferripulvis, A.focusalis, A.hades, A.insulanus, A.kelpiellus, A.lamingtonensis, A.ligdus, A.magicus, A.margaritarius, A.pellucidus, A.phantasmatus, A.pharusalis, A.ramsaris, A.rufiterra, A.sinusulus, and A.translucentis.

Material from the type localities of most described species of Papuanatula and rich material newly collected across New Guinea and on the island Sulawesi form the bases for this comprehensive study of the genus, including the description of a new subgenus Papuafiliolasubgen. nov. and 20 new species. Species delimitation is based on morphology of larvae and partly also imagos, supported by mitochondrial DNA data (COI) for some of the species. The total number of species is augmented from six to 26. The genus has a disjunct distribution on the islands New Guinea (incl. New Britain) and Sulawesi. A key to the larvae of all species is provided. Morphological similarities, the relationship of Papuanatula to other genera of Baetidae, and possible explanations for the high diversity in New Guinea are discussed.

A new species of the genus Scincella Mittleman, 1950 is described from northern Vietnam based on morphological and molecular evidence. Scincellatruongi sp. nov. is characterized by a combination of the following characters: size medium (SVL up to 59.4 mm); primary temporals 2; external ear opening without lobules; loreals two; supralabials seven or eight; infralabials six or seven; nuchals in three pairs; midbody scales in 28 rows; dorsal scales smooth, in six rows across the back; paravertebral scales 60-67, not widened; ventral scales in 60-70 rows; ten smooth lamellae beneath finger IV and 13-15 beneath toe IV; toes not reaching to fingers when limbs adpressed along body; dorsal surface of body and tail bronze brown with few black spots, a dark stripe running from nostril to eye and extending from posterior corner of eye along upper part of flank to the middle of the tail. In the phylogenetic analyses, the new species is recovered as an independent lineage with no clear sister taxon and at least 17.3% genetic divergence from other species in the genus based on a fragment of the mitochondrial COI gene.

The bee genus Dioxys is widely distributed across the Holarctic from the Mediterranean basin to western North America but is species-poor, and individual species can prove challenging to identify. Consequently, there has been a lack of consensus as to how many species actually exist. In the West Palaearctic, the number of species has varied from six to ten, depending on the worker. Due to a previously incorrect assessment of publication dates, Dioxysrotundatus Pérez, 1884, sp. resurr. is restored as the senior synonym of Dioxysmoestus Costa, 1884, syn. nov. The relationship between this species and Dioxysatlanticus Saunders, 1904 is clarified, with the latter restricted to the islands of Gran Canaria and Tenerife (Spain). Dioxysrufipes Morawitz, 1875 is considered part of the West Palaearctic fauna, replacing "D.moestus" sensu Warncke (1977) in the eastern Mediterranean. Dioxysmontanus Heinrich, 1977, sp. resurr. is revalidated from synonymy with Dioxyscinctus (Jurine, 1807). Dioxyspumilus Gerstäcker, 1869 is found to consist of four species, D.pumilus (eastern Mediterranean), Dioxysvaripes De Stefani, 1887, sp. resurr. (western Mediterranean), Dioxyscypriacus Popov, 1944, sp. resurr. (Cyprus), and Dioxyshermonensis sp. nov. (Israel: Mount Hermon). A neotype is designated for D.varipes, and Dioxysfalsificus Engel, 2023, syn. nov. is synonymised with it. This contribution produces a total of 13 species for the West Palaearctic region, and illustrates the degree to which persistent taxonomic problems exist even within small bee genera.

We describe three newly discovered species of the genus Stigmatophora Staudinger, 1881 from China, (S.bucseki sp. nov., S.longa sp. nov., and S.dianensis sp. nov.) and establish a new subgenus Bifurcistigmasubgen. nov. for the first two. Detailed descriptions of the external morphology and male and female genitalia of the new species are provided, along with those of S.obraztsovi Daniel, 1951, which is also assigned to the new subgenus. A checklist of all species of Stigmatophora is presented including the distribution, type locality, and synonymy of each.

Two new species of the wolf-spider genus Hippasosa Roewer, 1960 are described from Asia: Hippasosathailandica sp. nov. (♂) from Thailand and H.yunnanensis sp. nov. (♂♀) from China. Detailed species descriptions, morphological photographs, genitalia illustrations, and distribution maps of the new species are presented. Photographs of H.qiongzhongensis (Yin & Peng, 1997) are also provided for comparison purposes.

Based on adult morphological features, two new species are described and assigned to the leucochrysine genus Santocellus: Santocelluslegrandi sp. nov. from Central America and Santocellushelene sp. nov. from Bolivia. As a result, the genus, which now contains five known species, becomes more securely defined. An updated catalog and an illustrated key to the known Santocellus species are provided.