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Placocoris Mayr, 1864 (Pentatomidae: Discocephalinae) is a Neotropical genus with two known species, Placocoris viridis Mayr, 1864 and Placocoris albovenosus Kormilev, 1949. Placocoris is easily distinguished from other Neotropical pentatomids by having a strongly flat body, and armed femora. The genus was recently transfered to the tribe Ochlerini based on morphological similarities with the genera in the Janeirona Distant, 1911 clade. In this study we review Placocoris, describing for the first time the internal genitalia of the two species. We highlight the peculiar sexual dimorphism of the hind femora in both species. A distribution map is provided.

One new genus and four new species of Acanthocinini are described from French Guiana: Baryssinus giuglarisi sp. nov.; Nyssodrysternum angulatum sp. nov.; Styloleptus flavomaculatus sp. nov.; and Sternacutoides albomaculatus, gen. nov., sp. nov. Notes on the definition of Styloleptus Dillon, 1956 are provided.

A new species of Ranitomeya from Amazonian lowland forests in western Brazil and southeastern Peru is described and named. This species was formerly considered to be an outlying population of R. sirensis on the far eastern periphery of its geographic distribution. We analyze new and existing phylogenomic data and infer that the new species is not part of, or closely related to R. sirensis, but is sister to a clade including R. aetherea, R. aquamarina, R. cyanovittata, R. flavovittata, and R. yavaricola. The new species can be distinguished from species in its sister clade by its color pattern (yellow dorsal stripes, finely spotted ventral pattern, and a distinctive black band separating the gular and belly regions), and from R. sirensis by the presence/absence of a ventral color patch (absent in the new species, present in R. sirensis). Calls of the new species are longer in duration, with more pulses per call, and a slightly higher pulse rate, than any of the species in its sister clade for which call data are available. The new species is strongly associated with native Guadua bamboo, which it uses for reproduction. Based on museum records the new species also occurs in northern Bolivia. Unlike other close relatives, which are mostly monogamous, males of the new species appear to be polygynous, recruiting multiple females per breeding site.

A new species of the genus Rhyacophila Pictet 1834, Rhyacophila sivaramakrishnani sp. nov. of the Rhyacophila curvata group is described and illustrated from the Northwest Himalaya, India. Also, a new record, Rhyacophila kadphises Schmid 1959 is reported. With this addition, the genus is now represented by 168 valid species in India.

Alcidodes (Curculionidae) is a hyperdiverse group of weevils that pose a potential threat to various crop species, trees, and other plants. Through a combination of morphological and genetic analyses, we have identified a previously undescribed species of this genus, which we name Alcidodes erosa Mithun, Mahendiran & Pooja sp. nov. The validity of the new species is supported by both morphological and molecular data. All known adult specimens were collected from the critically endangered tree species, Hopea erosa (Bedd.) Slooten (Dipterocarpaceae), which is endemic to the Western Ghats. A recent assessment by the IUCN indicates that fewer than 200 individuals of this tree species exist and it is estimated that approximately 78-82% of seed damage is caused by Alcidodes erosa.

This study presents a revised and annotated checklist of the hawkmoths (Lepidoptera: Sphingidae) of the Dominican Republic, building on extensive fieldwork from 2007 to 2024, with additional data from iNaturalist. In total, we document 51 species in 21 genera, including two species newly recorded for the country: Pachylia syces insularis and Aellopos tantalus zonata. Distribution maps are provided for selected taxa of particular conservation or biogeographic interest (e.g., endemic species). Given that certain species remain known from only a few specimens, the results underscore the significance of continued surveys. Hawkmoths play essential ecological roles as pollinators in both natural and agricultural settings, and understanding their diversity and habitat requirements is vital to safeguarding these insects and the ecosystems they support.

Descriptions of two new cavernicolous collembolans of the family Entomobryidae Womersley, 1934 from Turkmenistan resulted from speleological expeditions organized by the association Karstology & Researchs in Central Asia (KRAC) and sponsored by the Commission for International Relations and Expeditions (CREI) of the French Speleology Federation to caves and mines in the Koytendag Mountains in 20232024. Two new species, Entomobryoides gruati sp. nov. and Drepanura koytendagi sp. nov. are described as the first Collembola discovered from subterranean ecosystems of Turkmenistan, Central Asia. Tables summarizing the diagnostic characters of world species of Entomobryoides Maynard, 1951 and Drepanura Schtt, 1891 are provided. Both new species are associated with subterranean habitats in dark cave zones. The discovery of two cave entomobryids highlight the high biodiversity potential of Turkmenistans cave ecosystems and suggest that vast majority of undescribed species are yet to be found. Given the minimal exploration of this region, a further biospeleological effort is essential to reveal diversity, distribution and endemicity of subterranean fauna in Central Asia.

A new ornithoctonine genus, Magnacrus gen. nov., is established with two species from the Central Highlands of Vietnam. Magnacrus tongmianensis (Zhu, Li & Song, 2002) gen. nov. comb. nov. is transferred from Citharognathus Pocock, 1895, and is redescribed based on the new Vietnamese specimens; its type locality is potentially wrongly recorded, this species likely does not inhabit China. A new species, M. taynguyenensis gen. nov. sp. nov., from Vietnam is described with both sexes. The type species of Citharognathus, C. hosei Pocock, 1895, is redescribed based on the type specimen and new samples from two populations of Sarawak, Borneo. The males of M. tongmianensis gen. nov. comb. nov., and C. hosei are additionally described. Insights into natural history and conservation of all species are included. A distribution map for both Magnacrus species is provided.

A comprehensive and annotated catalogue of the earwigs (Insecta: Dermaptera) that inhabit Mexico was compiled. Six families were recorded: Anisolabididae with 4 genera and 5 species; Forficulidae with 9 genera and 23 species; Haplodiplatyidae with 1 genus and 3 species; Labiduridae with 1 genus and 1 species; Pygidicranidae with 1 genus and 1 species; and Spongiphoridae with 7 genera and 21 species; totaling 23 genera and 54 species. Additionally, 5 fossil species are listed, in 3 current genera and 1 fossil genus, belonging to the families Haplodiplatyidae (1 species) and Spongiphoridae (4 species). Finally, 14 records were considered dubious for the country. The states with the most species of earwigs recorded are Veracruz with 30 species, Morelos with 10 species and Guerrero with 9 species; no records are known from Campeche and Tlaxcala. The original descriptions of Ancistrogaster burri Kirby, 1903 and Paracosmia gulosa (Scudder 1876) (Forficulidae) were revisited. Given the lack of type material and that the descriptions were deemed too vague to accurately identify them, these taxa are hereby relegated as nomina dubia.

During a nematological survey in the Bale Mountains National Park (Ethiopia), an undescribed species belonging to the genusMesodorylaimus was found. M. aethiopicus sp. nov. is characterised by having a medium-sized body 14831858 m long, the lip region weakly angular and offset by a slight depression, a medium-sized odontostyle (1417 m long), a longitudinal vulva slit positioned at mid-body, absence of pars refringens vaginae, a well-developed pars dilatata oviductus, a relatively long female tail (133.5162.5 m), male spicules 56.063.5 m long and regularly spaced 1214 ventromedian supplements. The new species was morphologically compared to eight species of the genus Mesodorylaimus and two species of the genus Calcaridorylaimus with similar body length and tail length values. In molecular phylogenetic studies, using the sequences of 18S rDNA and 28S rDNA, close relationships of M. aethiopicus with representatives of the genera Mesodorylaimus and Calcaridorylaimus were shown. However, the sequences of species with a similarity above 99% for the 18S rRNA gene and above 98% for the 28S rRNA gene were absent in GenBank.