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Intermittent rivers and ephemeral streams (IRES), which cease flow and/or dry at some point, are the most abundant waterways on earth, and are found on every continent. They can support a diverse, and often abundant, terrestrial and semi‐aquatic invertebrate (TSAI) fauna, which has been poorly explored due to its position at the fringe between aquatic and terrestrial disciplines. TSAIs can inhabit a variety of habitat types, including the shoreline, the surface of exposed gravel bars, unsaturated gravels, dry riverbeds, riparian zones, and floodplains. Much less is known about the species composition and ecological roles of TSAIs of IRES than their aquatic counterparts, with TSAIs being largely overlooked in conceptual models, legislation, policy, and ecological monitoring. Herein we review the TSAI literature that has increased substantially over the last decade and present conceptual models describing how TSAIs respond to hydrological changes in IRES. Then, we test these models with data collected during wet and dry phases in IRES from Australia and France. These generic models can be utilised by water managers and policy makers, ensuring that both wet and dry phases are considered in the management and protection of IRES. IRES should be viewed as a habitat continuum through time, with taxa from a pool of aquatic, semi‐aquatic and terrestrial invertebrates inhabiting at any hydrological stage. We call for collaboration among terrestrial and aquatic ecologists to explore these invertebrates and ecosystems further. [ABSTRACT FROM AUTHOR]

A new species of the carabid genus Pentagonica Schmidt-Goebel, 1846 (Pentagonicini) is described from Malaysia: Pentagonica cechovskyi sp. nov. It belongs in the ruficollis-group of the genus which is characterized by dark head and elytra, but yellow, rufous, or pale brown pronotum lacking a transverse ridge at the base. [ABSTRACT FROM AUTHOR]

The ground beetle (Carabidae) fauna of Timor is reviewed based on recent collecting by the Australian Museum, in Timor Leste. 53 species were collected, of which the following nine species are described as new: Mecyclothorax timorensis sp. nov. Baehr; M. reidi sp. nov. Baehr; Rhytisternus externus sp. nov. Baehr; Arhytinus timorensis sp. nov. Baehr; Notagonum reidi sp. nov. Baehr; N. angusticolle sp. nov. Baehr; Perigona timorensis sp. nov. Baehr; Aristolebia timorensis sp. nov. Baehr; Lebia timorensis sp. nov. Baehr The new species are compa red with their nearest relatives. The remaining material is identified to species, or at least to genus, and discussed according to the current classification of Carabidae. Several species and genera are newly recorded for Timor. In spite of the rather small number of species contained, the sample allows some insight into the relations of the Carabid fauna of Timor to the Oriental and Australopapuan Regions, with about two thirds of the species belonging to the Oriental fauna, and one third to the Australopapuan fauna. A few species also belong to subgroups that are restricted to the southeasternmost Oriental Region "Wallacea"--Sulawesi, and the Maluku, Aru and Kei Islands. [ABSTRACT FROM AUTHOR]

Krantzoseius walteri gen. nov., sp. nov. (Mesostigmata: Phytoseioidea: Blattisociidae: Blattisociinae) is described from female, male, deutonymphal, protonymphal and larval specimens collected from Trichosternus perater Sloane (Coleoptera: Carabidae: Pterostichini) in South East Queensland, Australia. The family assignment of the new species is tentative and is based largely on its lack of the apomorphic characters that define the other phytoseioid families (Otopheidomenidae, Phytoseiidae and Podocinidae). Its highly hypotrichous body, reduced body shields and leg chaetotaxy are especially unusual, and although similar to the Otopheidomenidae in these characters, K. walteri lacks the adaptations to parasitism that define the Otopheidomenidae. Curiously, the opisthosomal chaetome of the larvae (12 pairs of setae plus postanal seta) is richer than that of the protonymph (nine pairs of setae plus postanal seta), representing a rare example of postlarval setal suppression. [ABSTRACT FROM AUTHOR]

A revision of the genus Setodyschirius Fedorenko, 1996 from Australia is provided. Thirteen species are recognized, including six species described as new: S. pseudozonatus sp. nov. from Northern Territory, Western Australia and Queensland, S. storeyi sp. nov. from Western Australia and Northern Territory, S. jabiru sp. nov. from Northern Territory, S. monteithianus sp. nov. from Queensland and Northern Territory, S. weiri sp. nov. from Northern Territory, Queensland, New South Wales and Western Australia, and S. kangaroo sp. nov. from South Australia. Types and additional specimens were examined for all seven species known to date, lectotypes are designated for S. stephensii (MacLeay, 1865) and S. macleayi (Sloane, 1896). All species are redescribed, illustrated and compared to related taxa and the known distribution is summarized. A key to the species of Setodyschirius is provided. [ABSTRACT FROM AUTHOR]

1. We compared assemblages of ground-active, terrestrial beetles and spiders from different areas of river red gum Eucalyptus camaldulensis floodplain forest in subhumid, south-eastern Australia before and for 2 years following a managed flood to determine whether the Flood Pulse Concept is an appropriate ecological model for this regulated, lowland river-floodplain system. 2. Immediately following flooding, the abundance, species richness and biomass of beetles were greatest at sites that had been inundated for the longest period (approximately 4 months). The abundance, species richness and biomass of spiders were not reduced at sites that were flooded for 4 months compared with unflooded or briefly flooded areas. Sites recently flooded for several months had high densities of predatory, hygrophilic beetles (Carabidae) and spiders (Lycosidae). 3. Over the 2 years following the flood, beetles generally were more abundant at sites that had been inundated for longer. At all sampling times, the species richness of beetles at sites increased with the length of time sites were inundated, even before the flood. Neither the abundance nor species richness of spiders was related to duration of flooding. 4. The structure of beetle and spider assemblages at sites that were flooded for different lengths of time did not appear to converge monotonically over the 2 years after the flood. 5. Managed flooding promotes diversity of beetles and spiders both by providing conditions that create a ‘pulse’ in populations of hygrophilic specialists in the short term, and by creating subtle, persistent changes in forest-floor conditions. Despite its monotypic canopy, river red gum floodplain forest is a habitat mosaic generated by differing inundation histories. [ABSTRACT FROM AUTHOR]

Comparisons of catches of beetles in standard pitfall traps and various patterns of barrier pitfall traps were made in open grassy woodland in Victoria, Australia, in late summer. Comparative results are given for abundance and morphospecies richness of total Coleoptera, and for Carabidae as a more limited focal group. For both categories, in three separate trials (1) use of 120 cm barriers gave larger catches than standard traps (1360 individual beetles [503 Carabidae] in barrier traps, 363 [57 Carabidae] in standard traps, pool of 129 morphospecies); (2) catch sizes increased almost 5-fold with increasing barrier length (0, 30, 60, 120 cm) (61 morphospecies); and (3) use of a five-trap system with barriers gave higher numbers (3344 and 2303 total beetles, 345 and 135 Carabidae) than the same configuration without barriers (92 morphospecies). [ABSTRACT FROM AUTHOR]

In this study, we conducted a summer sampling of carabid beetles in eastern Australia to identify their associated parasitic mites. Here, we describe three new species of the genus Eutarsopolipus from under the elytra (forewings) of three native carabid species (Coleoptera: Carabidae): Eutarsopolipus paryavae n. sp. (pterostichi group) from Geoscaptus laevissimus Chaudoir; Eutarsopolipus pulcher n. sp. (leytei group) from Gnathaphanus pulcher (Dejean); and Eutarsopolipus chlaenii n. sp. (myzus group) from Chlaenius flaviguttatus Macleay. We further provide an identification key of the world species of pterostichi and leytei species groups as well as closely related species of the myzus group possessing similar characters including short cheliceral stylets. The significant diversity of Eutarsopolipus recovered here suggests that the current knowledge about Australian podapolipid mites (specially Eutarsopolipus) is still in its infancy and deserves further study., (© A. Katlav et al., published by EDP Sciences, 2021.)