Search results for "WIG"

Systematic Position of the Fossil Burrower Bug Eocenocydnus lisi Popov, 2019 (Hemiptera, Heteroptera, Cydnidae) Revealed by a Parallel/Cross-Eyed Vie…

2022

The fossil burrower bug Eocenocydnus lisi described from the Late Eocene of the Isle of Wight, UK, is analysed using a parallel, cross-eyed viewing method. The species, tentatively placed in the subfamily Sehirinae, is redescribed and its systematic position is discussed. Newly recovered morphological characteristics allow it to be placed in the tribe Cydnini of the subfamily Cydninae.

Una Storia dell’arte italiana a più mani? Dibattiti e forme di dissertazione storico-artistica sul «Kunstblatt» (Rumohr, Förster, Gaye e qualche anti…

2006

This article focuses on the German art review «Kunst-Blatt» and its leading role in early Nineteenth-Century historiography of Italian art. Particular attention is drawn to the contributions of three eminent German scholars of this period: Ludwig Schorn (1793-1842), Ernst Förster (1800-1885) and Johannes Gaye (1804-1840).

Left-handed neutrino disappearance probe of neutrino mass and character

1996

We explore the sensitivity to a non vanishing neutrino mass offered by dynamical observables, i.e., branching ratios and polarizations. The longitudinal polarization in the C.M. frame decreases by a 4% for $D^+ \rightarrow \tau^+ \nu_\tau$ and $m_{\nu_\tau}=24$ MeV. Taking advantage of the fact that the polarization is a Lorentz variant quantity, we study the polarization effects in a boosted frame. By means of a neutrino beam, produced by a high velocity boosted parent able to flip the neutrino helicity, we find that an enhanced left-handed neutrino deficit, induced by a Wigner rotation, appears.

Feces production as a form of social immunity in an insect with facultative maternal care

2015

Background Social animals have the unique capability of mounting social defenses against pathogens. Over the last decades, social immunity has been extensively studied in species with obligatory and permanent forms of social life. However, its occurrence in less derived social systems and thus its role in the early evolution of group-living remains unclear. Here, we investigated whether lining nests with feces is a form of social immunity against microbial growth in the European earwig Forficula auricularia, an insect with temporary family life and facultative maternal care. Results Using a total of 415 inhibition zone assays, we showed that earwig feces inhibit the growth of two GRAM+ bact…

Volatile constituents of flowering twig oil

2004

Summary The chemical constituents of the volatile oil of mature flowering twigs of wild Hyptis swaveolens growing widely in northern India were analyzed by gas chromatography–mass spectrometry. Forty one compounds consisting of 77.75% of the oil were identified. The major constituents of the oil were sabinene (14.18%), β-caryophyllene (12.52%), caryophyllene oxide (10.50%), abietatriene (6.42%), terpinen-4-ol (4.88%), limonene (4.42%), cis -sabinene hydrate (3.52%), spathulenol (3.14%), α-terpinolene (2.75%), β-pinene (2.42%), p -cymen-8-ol (1.76%), trans -sabinene hydrate (1.33%) and abietadiene (1.01%).

Recensione a Ludwig Klages, Espressione e Creatività, a cura di Davide Di Maio, Christian Marinotti Edizioni, Milano 2015, pp. 200

2018

Assembling Reminders for a Particular Purpose: Paolozzi’s Ephemera, Toys and Collectibles

2019

This chapter addresses the centrality of environmental installations in Paolozzi’s late production and the relevance that the practice of “assembling reminders for a particular purpose” holds in his understanding of the artist’s profession, further constituting another aspect of affinity with Wittgenstein. In order to do so, Mantoan examines three aspects that are instrumental to understand Paolozzi’s ‘collecting mood’ that led him to assemble a rich variety of items, ephemera, toys and objects of popular culture: the first one concerns the likely origins of this attitude, grounded in his childhood years, as well as in the influence of Parisian Surrealism and American mass culture; the seco…

Friend or foe? The apparent benefits of gregarine (Apicomplexa: Sporozoa) infection in the European earwig

2020

International audience; Studying the costs and benefits of host-parasite interactions is of central importance to shed light on the evolutionary drivers of host life history traits. Although gregarines (Apicomplexa: Sporozoa) are one of the most frequent parasites in the gut of invertebrates, the diversity of its potential impacts on a host remains poorly explored. In this study, we addressed this gap in knowledge by investigating the prevalence of natural infections by the gregarine Gregarina ovata and testing how these infections shape a large set of morphological, behavioural and physiological traits in the European earwig Forficula auricularia. Our results first show that G. ovata was p…

Paternal signature in kin recognition cues of a social insect: concealed in juveniles, revealed in adults

2014

Kin recognition is a key mechanism to direct social behaviours towards related individuals or avoid inbreeding depression. In insects, recognition is generally mediated by cuticular hydrocarbon (CHC) compounds, which are partly inherited from parents. However, in social insects, potential nepotistic conflicts between group members from different patrilines are predicted to select against the expression of patriline-specific signatures in CHC profiles. Whereas this key prediction in the evolution of insect signalling received empirical support in eusocial insects, it remains unclear whether it can be generalized beyond eusociality to less-derived forms of social life. Here, we addressed this…

Sibling cooperation in earwig families provides insights into the early evolution of social life.

2014

The evolutionary transition from solitary to social life is driven by direct and indirect fitness benefits of social interactions. Understanding the conditions promoting the early evolution of social life therefore requires identification of these benefits in nonderived social systems, such as animal families where offspring are mobile and able to disperse and will survive independently. Family life is well known to provide benefits to offspring through parental care, but research on sibling interactions generally focused on fitness costs to offspring due to competitive behaviors. Here we show experimentally that sibling interactions also reflect cooperative behaviors in the form of food sh…