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A modern type of ant-like stone beetle larva preserved in 99-million-year-old Kachin amber
Get PDFScydmaeninae, the group of ant-like stone beetles, was previously named “Scydmaenidae”, but is today recognized as an ingroup of Staphylinidae. The group has a more or less global distribution and includes 4,900 formally described species. The fossil record of the group seems well studied with almost 40 formally described species so far. However, all the described fossil specimens are adults, which once again demonstrates the rarity of reports of larvae. This fact also applies for the extant counterparts: even the larvae of some modern lineages of Scydmaeninae have not been identified yet. Here we contribute to the fossil record of ant-like stone beetles with the first report of a relatively modern-appearing fossil larva. In the center of the study is a single specimen preserved in 99-million-year-old Kachin amber, Myanmar. The fossil shares multiple characteristics (for example, long and slender antennae, maxillary palps, and walking legs) with modern representatives of second stage larvae of the species Stenomastigus longicornis. This similarity indicates a closer relationship to this species, and the fossil is therefore likely a representative of the group Mastigini. In the light of the new find, we discuss phylogenetic implications and the evolution of developmental patterns within Scydmaenina
Inclusive residency and silver cohousing: unity is strenght
No full textLong-term demographic dynamics, characterised by increasing life expectancy, low fertility and marital instability, pose major challenges to the Italian welfare, particularly with regard to the care of the elderly and their well-being. Ageing in place and inclusive housing are key elements to foster and promote active ageing. However, in Italy solidarity and silver cohousing projects are still scarce and limited to the sphere of social experimentation. This article presents existing good practices on the territory, which could represent a starting point for rede-signing the Italian housing system in the direction of greater inclusiveness
L\u27 Internazionale sindacale rossa e le sezioni nazionali: fra centralizzazione e autonomia
No full textIn queste note avanzo qualche ipotesi sui rapporti fra il Comintern, il Profintern e i sindacalismi degli anni fra le due guerre analizzando il rapporto contraddittorio fra sindacalismo conflittuale soprattutto occidentale e linee politiche mutevoli del Comintern. L’esistenza spesso tormentata, le vicende difficili dei suoi principali dirigenti, le libertà delle sezioni nazionali rispetto al centro indicano la specificità delle esperienze sindacali rispetto a quelle politiche contemporanee. Il sindacalismo fu certamente il principale veicolo di influenza dei partiti comunisti nelle società in cui operavano. La stessa bolscevizzazione sarebbe stata impensabile senza la possibilità di contare sui quadri di formazione sindacale. Soprattutto a partire dal ‘28, i sindacati aderenti all’isr avevano adottato una strategia particolarmente radicale negli scioperi. Tuttavia i sindacati russi che quantitativamente dominavano la nuova organizzazione internazionale potevano a fatica essere considerati “sindacati” nel significato occidentale del termine, ma piuttosto strumenti di mobilitazione produttiva. Una evidente contraddizione che ci restituisce l’originalità di questa rete internazionale
Explorative data analysis from multiparametric monitoring at the Acuto Field Laboratory (Central Italy) for detecting preparatory conditions to rock block instabilities
No full textThis study summarises the research activity carried out in the Acuto Field Laboratory (FR, Italy), where experiments testing the stability of a subvertical rock wall in limestone are ongoing within an abandoned quarry, now devoted to studies focused on the mitigation of geological risks. The research focuses on the natural factors that can prepare a subvertical rock mass to evolve through subsequent rock fall if predisposing conditions are verified. A network of multiparameter monitoring sensors is installed on three different sectors of the rock wall to record both the natural and anthropogenic stressors and the effects of deformation induced by them. In terms of stressors, the multiparametric monitoring system is able to detect the environmental parameters, such as temperature, rainfall, wind, strain, and vibrations. In terms of induced effects on the rock mass, the multiparametric monitoring system is suitable to detect deformation, displacement, and microseismicity. In this paper, the different monitored parameters are presented along with detailed analyses to highlight cause to effect relationships, such as freezing and thawing, to retrieve correlations among different factors. The obtained results represent the first analysis of the data recorded in the three instrumented sectors of the field laboratory and allowed evaluating the role of preparatory factors in inducing rock falls, opening further perspective on numerical modelling or machine learning applications based on monitoring data
Capnodis cariosa (Pallas, 1776) found in a new Romanian location at the northern limit of its distribution range (Coleoptera: Buprestidae)
Get PDFHere we report a new population of Capnodis cariosa from the South-Western Romania, at the border with the Republic of Serbia (Danube’s Defile). The presence of this species was reported in the past from Southern Dobroudja (South-Eastern Romania, near the Bulgarian border), this being its only, yet nowadays probably extinct, local Romanian population. In our citizen science-based investigations, which started in the spring of 2020, we found 16 specimens in the area of the Iron Gates Natural Park, between Dubova and Svinița (Danube’s Defile, Mehedinți County). This location represents the northernmost one for this species in Europe and the only verified present-day location for this species in Romania. Some considerations about biology, ecology and distribution of Capnodis cariosa are also provided. Two updated distribution maps of this species in Romania, in the Danube’s Defile and in the whole Mediterranean areas, are also presented
The coccid-tending ant genus Acropyga Roger (Hymenoptera: Formicidae) and its obligate associated myrmecophilous scale insect genus Eumyrmococcus Silvestri (Hemiptera: Xenococcidae) new to Italy
No full textThe ant genus Acropyga Roger, 1862 (Hymenoptera: Formicidae) and its associated myrmecophilous scale insect genus Eumyrmococcus Silvestri, 1926 (Hemiptera: Xenococcidae) are reported from Italy for the first time. These records are based on some alates of Acropyga paleartica Menozzi, 1936 with females of Eumyrmococcus corinthiacus Williams, 1993 carried in their mandibles, collected in Salento area (Apulia region, South Eastern Italy) in 2020
The Comintern Seen by the International Trotskyist Movement
Get PDFQuesto articolo intende esaminare il modo in cui il Comintern fu fronteggiato dal movimento trockista internazionale, che fino al 1933 si considerò la sua ala sinistra, un’opposizione interna avente l’obiettivo di contrastare il “processo di degenerazione burocratica” del Comintern e riportarlo sulla “retta via”, quella dei suoi primi quattro congresso. A seguito dell’ascesa al potere di Hitler nel 1933, invece, il movimento trockista internazionale decise di ripudiare il Comintern a causa della sua responsabilità indiretta nella realizzazione di tale evento e nella disfatta del comunismo tedesco. Da quel momento in poi, infatti, il movimento trockista internazionale si considerò una rete comunista globale alternativa al Comintern “stalinizzato”, un’alternativa che nel 1938 assunse la denominazione di Quarta Internazionale
Arsipoda reidi, a new replacement name for Arsipoda montana D’Alessandro, Samuelson & Biondi (Coleoptera: Chrysomelidae)
Get PDFArsipoda reidi nom. nov. is proposed for Arsipoda montana D’Alessandro, Samuelson & Biondi, 2016 because the specific name was preoccupied by the species Arsipoda montana Oke, 1932
Mobilization Strategies in Ants (Hymenoptera: Formicidae)
Get PDFThe mobilization strategies of ants have been studied quite well, but the questions of how far foragers of different species are able to move away from the nest remain unclear. The study of changes in foraging strategies depending on the type of habitat remains relevant. The aim of the work is to study mobilization strategies in 31 ant species. The study was conducted in 2019-2021 on the territory of 2 countries - Ukraine (Kyiv region and Kyiv) and Uzbekistan (Tashkent region, Tashkent). Pairs of baits (one carbohydrate and one with tuna) were laid out at a distance of 3 m from each other, in the form of transects. In total, 16 transects (417 pairs) were laid out in Ukraine in 9 types of habitats, in Uzbekistan - 5 transects (70 pairs of baits) in one type of habitats. The number of ants on each type of bait was recorded every 10 minutes, for 0-90 minutes. The distance to the nest from where the mobilization took place was also determined. It has been established that all ant species can be divided into 4 clusters according to the average distance to the nest from which foragers mobilize on the bait. Cluster 1 included 3 species of dominants, which were able to move away from the nest at a distance of up to 50 m, cluster 2 included 4 species of dominants, whose foragers could move up to a distance of 20 m. Cluster 3 included 23 species that moved away from nest at a distance of 0.2-2.0 m, cluster 4 - 1 species, foragers of it moved to a distance of up to 7 m. Preferences of bait types were noted in 15 ant species. The distance to the nest (F=9.02, p<0.001) had the greatest influence on the number of ants on baits among the considered factors, followed by species of ants (F=6.75, p<0.001) and habitat type (F=4.17, p<0.001). In habitats where an ant species mobilizes a smaller number of foragers, they have to travel, on average, long distances to a food source. Consequently, the abundance of food resources in the habitat of ants is determined by the average distance of mobilization from the nest - the smaller it is, the more resources
Apomyelois bistriatella new to Italy from “Tenuta Presidenziale di Castelporziano” (Lepidoptera: Pyralidae)
Get PDFApomyelois bistriatella (Hulst, 1887) was found for the first time in Italy (Latium)