The genus Setosella included to date six species. After revision, only four of these species were retained, i.e. S. vulnerata, S. cavernicola, S. folini and S. spiralis. The remaining two species were tentatively placed in Woodipora, W.? antilleana n. comb., and Andreella,  A.? fragilis n. comb. On the other hand, scanning electron microscopy examination of Mediterranean material, revealed the presence of three new species previously included in species complexes S. cyclopensis n. sp. from the open-shelf, S. rossanae n. sp. from submarine caves, and S. alfioi n. sp. from deep-waters. The diagnosis of the genus was amended to include the occurrence of kenozooids in S. cyclopensis n. sp. and S. cavernicola, and of free-living ring-shaped and scorpioid colonies in S. folini and S. alfioi n. sp. All the seven species now in Setosella have present-day representatives; the geographic distribution of the genus is restricted to the NE Atlantic and adjacent seas; its stratigrafic distribution is rejuvenated to the late Tortonian-early Messinian of southern Italy and insular Greece, with only three species occasionally and discontinuously reported. All species are able to produce numerous, subsequent intramural buds and morphological differences seem to be consistently associated with exploitation of particular habitats and substrata.Mystacagenia Evans, 1973 is a strictly Neotropical genus of pompilid wasps (Pepsinae Ageniellini), restricted to rain forest areas. The genus comprises four described species M. albiceps Evans, 1973 (Peru, Brazil), M. p-Hydroxy-cinnamic Acid bellula Evans, 1973 (Peru), M. variegata Evans, 1973 (Brazil), and M. elegantula Evans, 1980 (Panama). Mystacagenia is scarce in collections, with only eight specimens registered, all of these females (Evans 1973, 1977, 1980; Cambra 1993; Corro Cambra 2011).Díaz-Díaz et al. (2018) described a new species of oweniid polychaete, Owenia vieitezi, from the north-western coast of the Gulf of Venezuela, Caribbean Sea. Although the description and figures presented by Díaz-Díaz et al. (2018) fully characterize the new species, the journal issue in which the description appeared was published online only and the article in which the new name appeared did not include a ZooBank registration number (LSID), required for validation of new species names in electronic-only publications (ICZN 2012). As a result, the name Owenia vieitezi Díaz-Díaz, Parapar Moreira, 2018, as published in Cahiers de Biologie Marine 59 589-597, is not available according the International Code of Zoological Nomenclature (ICZN 1999, 2012). Therefore, the present note serves to validate the name Owenia vieitezi by fulfilling the ICZN conditions for nomenclatural availability.The genus Voragocoris Weirauch, 2012 is composed of Voragocoris schuhi Weirauch, 2012 and Voragocoris amrishi Makhan, 2013, previously recorded from Peru and Suriname, respectively. In this paper, a new species, Voragocoris weirauchae sp.n., is described based on specimens collected in the Brazilian Amazon, representing the first record of the genus from Brazil. We provide diagnosis, description, photographs of habitus, and scanning electron micrographs of the diagnostic features. A key to species based on males of Voragocoris is also presented.One new taxon was brought to light during an Ephemeroptera survey in Roraima state, but it was not described. This new taxon was included in a cladistics analysis (as Gen A) in order to delimitate some Baetidae genera, and it was recovered as a new genus. Taking in account that the new genus and species status were already defined in a previously published paper, the objective of this study was to describe it based on imagoes and nymphs, and formally name it as Macuxi tunamore gen. nov. sp. nov. The new genus is sister group of Rhopyscelis Cruz, Salles Hamada + Varipes Lugo-Ortiz McCafferty clade, and can be differentiated from both mainly by the absence of long and stout setae on femora of all legs. Several characteristics were obtained in the morphological analyses to distinguish the new genus from other genera, but the paraglossa and glossa with pectinate setae, and claw with two rows of denticles, one reduced and other with apical ones larger than the others, are highlighted.Here, we present the first two South American species of Nealiolus Mason (Hymenoptera, Braconidae), both reared from weevils damaging plants of economic value Nealiolus chayohtli Wengrat Shimbori sp. n. on Phymatophosus squameus feeding in stems of Sechium edule (chayote), and Nealiolus jaboticaba Shimbori Wengrat sp. n. on Conotrachelus sp. in fruits of Plinia cauliflora (jaboticaba). This parasitoid genus is poorly studied, despite its potential importance as a biological control agent of several pest weevils (Curculionidae), including the cotton boll weevil. With the addition of the two new species, nine species of Nealiolus are known, three of them occurring in the Neotropical region. We also present an identification key to species of Nealiolus and DNA barcoding information for the new species.A new species of the cosmetid harvestman genus Taito Kury Barros 2014 is described from the Área de Conservación Privada (ACP) Panguana, Peruvian Amazonia, which extends the distribution range of the genus to the south-west. The herein described species Taito adrik sp. nov. differs from all other known species of the genus by the distinct shape of the equuleus, the armature of leg IV in males, and the structure of male genitalia, in combination with features of the chelicerae and the anal operculum. In addition, COI barcodes of the new species are provided.Knowledge of homoscleromorph sponge biodiversity has greatly improved during the last decade thanks to the increasing use of integrative taxonomy and extensive exploration of remote ecosystems. Indeed, recently described species have mostly been small sponges living in dark and near-impenetrable habitats. This work integrates morphological, cytological, ecological and molecular data to describe a new species belonging to the Plakina genus. Plakina doudou sp. nov. was found first during close inspection of photographs taken previously in a submarine cave on Martinique Island, where several new species had already been revealed. The new species lives in syntopy with P. arletensis. It is thinly encrusting, whitish in vivo, and its skeleton harbors a unique composition of diods, triods, monolophose triods and monolophose, dilophose and trilophose calthrops. Sequencing of a portion of the mitochondrial gene cox-1 indicates that the new species belongs to a well-supported clade containing the Mediterranean P. crypta and P.