Abstract The genera of Miracinae, currently in something of a state of flux, are discussed with respect to their morphological and molecular attributes. Centistidea Rohwer, 1914 is treated provisionally as a valid genus, distinct from Mirax Haliday, 1833, based partly on propodeal morphology, though this is acknowledged to be an unstable character across the subfamily. Molecular data from two previous studies of Australian Miracinae are discussed. Centistidea albantennalis Liu & Polaszek, 2014 is newly recorded from Papua New Guinea. Two new species of Centistidea are described from Australia: Centistidea cellula Liu & Polaszek, sp. nov. and Centistidea paraillidops Liu & Polaszek, sp. nov. Two new species of Mirax : Mirax tasmaniensis Liu & Polaszek, sp. nov. and Mirax polita Liu & Polaszek, sp. nov. are described from Australia. Mirax arcicensis Slater‐Baker & Fagan‐Jeffries, 2022, M. caelicus Slater‐Baker & Fagan‐Jeffries, 2022 and M. supremus Slater‐Baker, 2025 are transferred to Centistidea , hence the following new combinations Centistidea arcicensis (Slater‐Baker & Fagan‐Jeffries, 2022) comb. nov. , Centistidea caelica (Slater‐Baker & Fagan‐Jeffries, 2022) comb. nov. and Centistidea suprema (Slater‐Baker, 2025) comb. nov. A key to Mirax species of the world is provided, based mainly on published descriptions.

Abstract Biological collections are fundamental resources for biodiversity research, although they remain underutilised in many taxonomic efforts. In this study, we examine specimens deposited in the Entomological Collection of the Museu de Zoologia da Universidade de São Paulo (MZSP) to describe a new genus and species of cricket belonging to the tribe Neometrypini (Tafaliscinae). Annelotrypa gen. nov. and its type species, Annelotrypa xerophila sp. nov. , are described based on specimens collected in the arboreal Caatinga of Bahia, Brazil. This taxon represents the first confirmed record of Neometrypini in this xerophytic biome. The new genus is diagnosed by a distinctive combination of morphological traits, including an elongated, cylindrical body; micropterous forewings that do not medially cover the meso‐ and metanotum; laterally flattened fore and mid femora approximately twice as thick as their corresponding tibiae; hind tibiae (TIII) with a subapical spur formula of 4/0 (inner/outer); and short, rounded cerci that do not exceed the hind femora. Detailed morphological descriptions, measurements, and illustrations of external features and genitalia for both sexes are provided. Additionally, an updated identification key to the genera of Neometrypini (excluding the taxonomically uncertain Nessa Walker, 1879) is presented. This study expands the known diversity and distribution of Neometrypini in South America and emphasises the importance of continued taxonomic work within Tafaliscinae, particularly in poorly sampled habitats such as the Caatinga.

Abstract Environmental conditions crucially influence species presence, distribution, population dynamics and phenology. Global warming and land use changes exacerbate these conditions, converting wetlands into terrestrial or aquatic ecosystems and altering biotic communities. Ground‐dwelling beetles support key ecosystem functions such as nutrient cycling, pest control and seed dispersal. Despite previous studies on beetle diversity under various management practices, research on the ecological niches of beetles in Argentinian wetlands is limited. This study evaluates the influence of microhabitat‐scale environmental variables on ground‐dwelling beetle niches in modified wetlands in the Lower Delta of the Paraná River. Wetland replacement with planted forests alters the natural hydrological regime causing environmental changes. Six habitat types, categorised by tree species, land use and stand age, were studied. Beetles were collected using pitfall traps over 2 years, while environmental variables and vegetation structure were also measured. We recorded 45 beetle species within the Carabidae and Aphodiinae (Scarabaeidae). Hydrophilic species like Meraulax alatus , Loxandrus audouini and Lomanoxoides bitubericolis were primarily found in willow plantations and mature silvopastoral areas, where soil moisture is suitable, while species with greater ecological plasticity, like Paranortes cordicollis and Pachymorphus striatulus , thrived in poplar plantations. We conclude that structural and functional changes in this modified wetland landscape, induced by water management, planted forest species and livestock presence, generate different environmental conditions that act as environmental filters, shaping the occurrence of species according to their specific habitat requirements. Understanding and characterising beetle species niches is therefore crucial in preserving the ecological function and biodiversity of this wetland landscape.

Abstract This study reports the first confirmed occurrence of the Australian bee Hylaeus ( Gnathoprosopis ) euxanthus (Cockerell) in Argentina. The identification is supported by collected specimens reared from trap nests and photographic records from the iNaturalist platform. Observations on nesting behaviour, pollen provisioning and associated parasitoids are presented. Pollen analysis of brood cells revealed a preference for exotic Myrtaceae species. The study also records an endoparasitoid, Coelopencyrtus hylaei Burks (Encyrtidae). These findings highlight the importance of citizen science in detecting alien bee species.

No abstract is available for this article.

Abstract Parasitism is a strong selective agent that affects host fitness, and parasitism may be variable across often broad landscapes and ecological gradients. However, variation may also occur within small geographic areas due to local differences in habitat and climate. Here, we quantified the prevalence and intensity of ectoparasitic water mites ( Arrenurus sp.) and endoparasitic gregarines (Apicomplexa: Protozoa) in Australian common bluetail damselflies ( Ischnura heterosticta ), between sexes and across three populations in Cairns, Australia. We found that more than 42% of the damselflies were coinfected with water mites and gregarines. The prevalence of both parasite taxa differed between sexes, being higher in females, and also varied among the three populations. Furthermore, we investigated whether parasitism was correlated with damselfly body size, mass and lipid content. Water mite parasitism was negatively correlated with host body mass and lipid content; however, gregarine‐infected males and females had better body condition, as estimated by body length, mass and lipid content. In conclusion, our study suggests that damselflies with a larger body size have a higher prevalence of gregarine infection; however, the impact on body mass and lipid content may vary with parasite type.

No abstract is available for this article.

Abstract Zygaenula Doleschall, 1858 and Mesoctenia Enderlein, 1924 syn. nov. are small genera restricted to the Australasia region. Here, both genera are considered synonymous, supported by the synapomorphy width of frons, in relation to height, more than two times. A new species, Zygaenula mcalpinei sp. nov. is described from the Manu Island, Admiralty Archipelago, Papua New Guinea. Zygaenula australis (McAlpine, 1973) comb. nov. , Z. celyphoides (Walker, 1859) comb. nov. , Z. coalescens Hendel, 1914 comb. reinstat., Z. hilaris Hendel, 1914 comb. reinstat., and Z. paradoxa Doleschall, 1858 are redescribed. The lectotype and paralectotype are designated for specimens of Z. celyphoides comb. nov. In addition, an updated identification key and a distribution map are presented. The hypothesised phylogenetic relationship of the Zygaenula species is represented by the following parenthetical notation: ( Z . paradoxa ( Z. coalescens comb. reinstat.. ( Z . hilaris comb. reinstat. ( Z . mcalpinei sp. nov . ( Z. australis comb. nov . and Z . celyphoides comb. nov .))))).

Abstract We describe Pseudotermitoecia kungarakan Zilberman & Moreno, sp. nov. , a new species of the termitophilous rove beetle genus Pseudotermitoecia Kistner, 1985 (Termitusini: Termitospectrina) from Australia. This discovery expands the known diversity of the genus, previously represented solely by Pseudotermitoecia kakaduensis Kistner, 1985. Unlike P. kakaduensis , which was found in association with Nasutitermes eucalypti (Mjöberg, 1920) (Termitidae: Nasutitermitinae), P . kungarakan Zilberman & Moreno, sp. nov. is associated with Schedorhinotermes actuosus (Hill, 1933) (Rhinotermitidae), a relationship in the subtribe previously documented only for Termitoecia Bernhauer, 1920. This new host for the genus, along with modern knowledge on termite evolution, challenges previous hypotheses on the coevolution of the subtribe Termitospectrina and their hosts, herein discussed.