Search results for "Tardi"
showing 10 items of 86 documents
Further insights in the Tardigrada microbiome: phylogenetic position and prevalence of infection of four new Alphaproteobacteria putative endosymbion…
2019
Abstract Data from a previous study showed that microbiomes of six tardigrade species are species-specific and distinct from associated environmental microbes. We here performed a more in-depth analyses of those data, to identify and characterize new potential symbionts. The most abundant bacterial operational taxonomic units (OTUs) found in tardigrades are classified, and their prevalence in other environments is assessed using public databases. A subset of OTUs was selected for molecular phylogenetic analyses based on their affiliation with host-associated bacterial families in tardigrades. Almost 22.6% of the most abundant OTUs found do not match any sequence at 99% identity in the IMNGS…
New multilocus phylogeny reorganises the family Macrobiotidae (Eutardigrada) and unveils complex morphological evolution of the Macrobiotus hufelandi…
2021
The family Macrobiotidae is one of the most speciose and diverse groups among tardigrades. Although there have been attempts to reconstruct the phylogeny of this family, the evolutionary relationships within Macrobiotidae are only superficially determined as available genetic data cover only a small fraction of this vast group. Here, we present the first extensive molecular phylogeny of the family based on four molecular markers (18S rRNA, 28Sr RNA, ITS-2 and COI) associated with detailed morphological data for the majority of taxa. The phylogenetic analysis includes nearly two hundred sequences representing more than sixty species, including sixteen taxa that have never been sequenced and/…
Predicting and testing functional responses: An example from a tardigrade–nematode system
2008
Abstract Numerous studies have empirically measured consumer functional responses or theoretically developed response models, but whether these models can quantitatively predict observed data has hardly been tested. We perform such a test for the terrestrial predator–prey system Macrobiotus richtersi (Tardigrada)– Acrobeloides nanus (Nematoda). For two different size classes of A. nanus , we report a functional response as measured in the laboratory and quantitatively compare it to predictions of three models with different degrees of complexity: (1) the disc equation which does not include satiation effects; (2) the steady-state satiation (SSS) equation which assumes a constant level of pr…
Resolving the systematics of Richtersiidae by multilocus phylogeny and an integrative redescription of the nominal species for the genus Crenubiotus …
2020
AbstractThe family Richtersiidae, although established recently with the use of phylogenetic methods, was considered potentially paraphyletic at the time of its erection. Until now, the family comprised four genera, Richtersius, Diaforobiotus, Adorybiotus and a newly erected genus Crenubiotus. However, the genetic characterisation for the latter two genera was very limited or absent. To address concerns about the phylogenetic affinity of these two genera, we present a multilocus phylogeny of the families Richtersiidae and Murrayidae based on four molecular markers (18S rRNA, 28S rRNA, ITS-2 and COI). Our results show a distinct evolutionary lineage composed of Adorybiotus and Crenubiotus, w…
Integrative descriptions of two new Macrobiotus species (Tardigrada, Eutardigrada, Macrobiotidae) from Mississippi (USA) and Crete (Greece)
2021
In this paper, we describe two new Macrobiotus species from Mississippi (USA) and Crete (Greece) by means of integrative taxonomy. Detailed morphological data from light and scanning electron microscopy, as well as molecular data (sequences of four genetic markers: 18S rRNA, 28S rRNA, ITS-2 and COI), are provided in support of the descriptions of the new species. Macrobiotus annewintersaesp. nov. from Mississippi belongs to the Macrobiotus persimilis complex (Macrobiotus clade B) and exhibits a unique egg processes morphology, similar only to Macrobiotus anemone Meyer, Domingue & Hinton, 2014, but mainly differs from that species by the presence of eyes, granulation on all legs, den…
El acontecimiento Chileno, a propósito de la crisis social e institucional de octubre del 2019
2019
En este texto exploro el significado del momento político Chileno- a propósito del estallido social de octubre 2019- como un acontecimiento, siguiendo al filósofo Alain Badiou y Slavoj Žižek quienes exponen este concepto filosófico de manera magistral en muchos de sus trabajos y con plena contemporaneidad de nuestra realidad. Aunque el concepto fue estudiado ya por Heidegger y Derrida a principios del S. XX. Žižek en su libro denominado: “Acontecimiento”, explica este concepto como: un viaje milagroso del ser que no tiene un sentido preciso y que trastoca una realidad. Para este autor eslavo el acontecimiento es una efecto que ha excedido sus causas, por lo tanto tiene un poder mágico sobre…
« Au nom du père ou les “autobiographies” de ceux qui ne dessinent pas (Altarriba, Gallardo, Spiegelman, Tardi) »
2015
International audience; Antonio Altarriba, Miguel Angel Gallardo, Art Spiegelman ou encore Jacques Tardi sont autant d'auteurs qui ont dessiné l'autobiographie de leur père. Ces égodocuments, qui sont des oeuvres en collaboration, peuvent-ils encore être qualifiés d'autobiographies ? Faut-il parler d'allobiographies ? d'altrobiographies ? Par ailleurs, ces autobiographies père-fils ajoutent une nouvelle strate contractuelle à ce genre qui n'en manquait déjà pas : celle du modèle maussien du don et du contre-don.
Le site de Saint-Pierre-l’Estrier d’Autun (Saône-et-Loire) dans l’Antiquité tardive. Remarques sur le rapport entre l’évolution cimétériale et le cad…
2016
International audience
L'Antiquité tardive dans l'Est de la Gaule I : la vallée du Rhin supérieur et les provinces gauloises limitrophes : actualité de la recherche
2011
Die Akten der internationalen Tagung "L'Antiquité tardive dans l'Est de la Gaule, I", die im November 2008 in Straßburg stattfand, bieten 14 Beiträge zur Archäologie und Geschichte über die Spätantike im östlichen Gallien. Sie zeugen von dem Bestreben, die in dieser Region noch wenig bekannte Epoche verstärkt zu erforschen. Die Beiträge betreffen die französischen und deutschen Teile der spätrömischen Provinzen Lugdunensis I, Belgica I, Belgica II, Sequania und Germania I und präsentieren neue und zum Teil unveröffentlichte Arbeiten zu städtischen und ländlichen Siedlungen der Spätantike. Die Aufsätze, die Städte und/oder militärische Siedlungen vorstellen (Autun, Metz, Straßburg, Biesheim,…