Riviste Online SApienza - R.O.SA - 2 (Sapienza University of Rome)
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Note on the nomenclature and generic composition of the Ichnestomina Burmeister, 1842 (Coleoptera: Scarabaeidae, Cetoniinae)
Get PDFOn the basis of its overwhelming use in the literature over the past 100 years, it is here suggested that a reversal of precedence be applied to preserve the prevailing usage of the subtribal name “Ichnestomina” Burmeister, 1842 against the more technically correct but virtually ignored “Ichnestomatina”. As none of the key symplesiomorphic characters of the Ichnestomina type genus Ichnestoma Gory & Percheron, 1833 and its related genera are shared with Paraxeloma Holm 1988, it is also proposed that this latter genus be removed from the Ichnestomina and reincorporated into the subtribe Cetoniina Leach, 1815, or alternatively into the Goliathina Griffith & Pidgeon, 1832
First record of Aphaereta difficilis Nixon, 1939 from Italy with a key to the Italian species of the genus (Hymenoptera: Braconidae, Alysiinae)
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The present article reports the first discovery of Aphaereta difficilis Nixon, 1939 (Hymenoptera: Braconidae: Alysiinae) in Italy. The specimens were captured on the external wall of a house on the outskirts of the city of Galatone (province of Lecce, South-Eastern Italy) at the end of October 2020. They formed an aggregation of about eight specimens, all females, and they were in the immediate vicinity of pieces of rotting meat, so it is plausible to assume that the specimens came out of some Diptera-Cyclorrapha chrysalis. These finds represent a significant contribution towards a better knowledge of the distribution of members of the genus Aphaereta in Italy. Moreover, a key to the Italian Aphaereta species is provided
The Comintern and the Labour and Socialist International: Struggling Over Democracy and Working-Class Unity
Get PDFQuesto articolo analizza le relazioni tra l’Internazionale comunista (Comintern) e l’Internazionale operaia e socialista (ios) e i tre tentativi di cooperazione dagli anni Venti agli anni Quaranta. Le posizioni del dibattito interno all’ios riguardo al Comintern erano allineate a profonde contese ideologiche tra socialisti per definire la loro ideologia, se identificarsi con la democrazia o considerare tattiche più rivoluzionarie e collaborazione coi comunisti. All’inizio l’identità socialista soffrì per questa confusione, ma le azioni del Comintern e il suo successore imposero una netta separazione, definendo l’ideologia e l’internazionalismo socialdemocratici nel dopoguerra
Ai margini della marginalità.: Il lavoro delle donne attraverso le fonti della federazione provinciale del PCI di Viterbo
Get PDFIl saggio analizza il rapporto tra lavoro e sfera femminile negli anni della ricostruzione e del miracolo economico concentrandosi sul caso studio della Provincia di Viterbo attraverso le fonti del fondo della federazione provinciale del pci. L’adozione di una prospettiva di genere consente di fornire un quadro differente degli anni del boom che rivaluti il ruolo della donna dentro e fuori l’household. Quel che emerge è che l’ingresso nel mondo produttivo non ha significato in automatico maggior emancipazione: tra le donne del viterbese sembra permanere una svalutazione del proprio lavoro, giudicato complementare e integrativo rispetto a quello del marito, nonostante il loro apporto sia stato determinante per lo sviluppo di alcuni settori
Updates on the little-known Firminus maltensis, with revisited classification based on the anatomy of everted endophallus (Coleoptera: Scarabaeidae, Melolonthinae)
Get PDFNew information on the almost unknown rhizotrogine Firminus maltensis Rössner & Zorn, 2013, endemic to the Maltese Archipelago, is provided, based on new specimens recently collected. The species is transferred to the genus Rhizotrogus, introducing Rhizotrogus maltensis (Rössner & Zorn, 2013) as comb. nov., based on new evidence provided by the morphology of the endophallus, whose everted structure is addressed for the first time in the genera Firminus and Rhizotrogus. A comparative diagnostic characterization for the endophalli of the two genera is proposed. Some morphological traits are also discussed, and the first behavioural and ecological observations are provided
Characteristics of thermal processes in ant nests built under stones (Hymenoptera: Formicidae)
Get PDFAnts prefer to nest under stones. This is due to temperature regimes favorable to the development of ant broods. In this paper, we investigated the influence of stone and ambient parameters on ant nests and created a model of thermal processes in ant nests under stones. The simulation results were compared with temperature measurements. Temperature was measured under 20 stones under different illumination conditions (sun, penumbra and shade) for 3 ant species (Myrmica rubra, Formica cinerea, Lasius niger) in Ukraine from April to August 2021. Stones were categorized as hot, warm and cold. Each stone was checked once a week for the number of workers and brood. Under two stones, temperature was measured using loggers. The number of workers under hot stones in spring increased three weeks earlier than under cold and warm ones. In May-June, the maximum number of workers was recorded under hot stones. In July, the number of ants was minimal under all categories of stones. Larvae appeared under hot stones two weeks earlier than under other categories of stones. In August, the number of pupae under cold and warm stones was greater than under hot ones. Number of larvae and pupae was positively influenced by the diameter of the stone, whereas stone height did not exert an important role. Ants preferred to inhabit nests under large flat stones, which are easily heated in spring and warm the soil under them. Another important characteristic was the location of the stones. The highest brood development was noted in nests under stones in open areas well lit by the sun in the daytime. In summer ants migrated from under hot stones, because soil under it dry and warmed. Stones and their position may be important factors in accelerating the development of brood in colonies of ant species that do not have active thermoregulation
Ground beetle assemblages in six different forest ecosystems from Tuscany (Central Italy) (Coleoptera: Carabidae)
Get PDFForest ecosystems are an important part of the European territory. In 1994 the Regional Administration of Tuscany (Italy) promoted a monitoring program called MON.I.TO (Intensive Monitoring of forest in Toscana) in order to obtain data on the functioning of the forest ecosystem and on its response to possible sources of disturbance in this part of Italy. Although this monitoring program was mostly dedicated to botanical aspects, zoological research has found its proper place within it, and analyzing carabid coenoses provided useful information on the structural and functional characteristics of the forest. This study was performed in six different Tuscan forest ecosystems (Central Italy): 2 beech woodlands, 2 turkey oak woodlands and 2 holm oak woodlands with the aim of broadening the general knowledge of italian carabid communities and understanding the ecological, adaptive and biogeographical factors influencing their composition in different forest ecosystems. The analysis of the species richness and abundance data was carried out using non-parametric tests (Kruskal-Wallis and PERMANOVA tests) and descriptive statistic methods (n-MDS, SIMPER) applied to 22 different collected species (some of them endemic to the Italian territory) revealing that beech woodlands differed significantly from other forest types. Beech woodlands hosted carabid communities that are extremely sensitive to environmental simplification, showing a prevalence of brachypterous and predator species. In the other forest types, instead, carabid communities were composed of generalist species with high dispersal ability that were prevalent due to the effects of anthropic activities that occurred over time in these territories. Our results highlight the importance of considering community-wide functional implications in landscape ecology studies
Corrigendum to “A new hypothesis on the evolution of the hybosorid beetle capacity to conglobate their bodies into a tight ball (Coleoptera: Scarabaeoidea)”
Get PDFCorrigendum to “A new hypothesis on the evolution of the hybosorid beetle capacity to conglobate their bodies into a tight ball (Coleoptera: Scarabaeoidea)
The impact of the pandemic on tourism in Italy. Some reflections on employment
No full textThe impact that the COVID-19 pandemic has produced on tourism has been, and in part still is, dramatic from a quantitative point of view and, in many ways, not entirely predictable from the point of view of qualitative and structural transformations. Much specialist literature has been produced on the subject practically in real time and the debate, especially from the point of view of the tourism development model of the future, is still open. In this note we try to contribute to this discussion through some observations made on the dimension of tourist occupation in Italy. It seems, in fact, that the pandemic has highlighted the many factors of structural weakness in the sector, and that the message to be received is decidedly that of a significant change in the objectives and methods of tourism development
Pricing through the Choquet integral
Get PDFThe classical no-arbitrage pricing theory allows to price assets through a linear pricing rule, by assuming a frictionless and competitive market. Moreover, completeness of the market assures that the pricing rule is defined as a discounted expected value with respect to a unique equivalent martingale measure. On the other hand, under no-arbitrage assumption, incomplete models, such as the trinomial model, lead to a set of equivalent martingale measures. This suggests to work with non-linear pricing rules that can allow frictions in the market. A generalized pricing rule can be achieved by replacing additive measures with non-additive measures such as convex capacities and belief functions in Dempster-Shafer theory. The paper recaps results on non-additive measures and Choquet expectation as non-linear functional to be used in pricing. In the literature it has been proved that, under suitable conditions, a non-linear pricing rule can be expressed as a Choquet expectation with respect to a convex capacity. In the trinomial market model the lower probability is a belief function, but it cannot be used to reach the lower expectation through the Choquet integral. Nevertheless it can avoid a generalized Dutch book condition in the frameworkof partially resolving uncertainty