La découverte d’un galet gravé du Paléolithique final dans la région du Haut Iénisséï (Sibérie du Sud)

The paper deals with the artifact found during the realization of a salvage archaeological project connected with the construction of the railway from Kyzyl to Kuragino (the Krasnoyarsk Region, South Siberia) in 2012. During the exploration of the multicomponent habitation site of Irba 2 below the Holocene cultural strata the Pleistocene remains have been unearthed. These include bones of bison, reindeer, red deer, giant deer, wild horse, brown bear and hare, lithics, and pieces of worked antler. Radiocarbon dates indicate the Final Pleistocene age (ca. 13 to 11 kyr BP). The assemblage belongs to the Afontova culture dominated in the upper reaches of Yenisei during the Final Upper Paleolithic. The rare finding, an unique engraved oval-shaped flat pebble of white marble is worth to mention. It has 37 lateral grooves, cross-shaped engravings in the central parts of both lateral surfaces and traces of unfinished hollows. The nearest analogs are agalmatolite discs from the sites of Afontova Gora II and III located at Krasnoyarsk. These findings are rare in the Paleolithic and could be considered as amulets.     

Place de la tomographie d’émission de positons (TEP) pour l’évaluation thérapeutique et le suivi du cancer du sein

Positron emission tomography (PET) with fluorodeoxyglucose (FDG) is a nuclear imaging method whose interest in oncology has only grown over the past fifteen years. This article summarizes the results in monitoring and therapeutic evaluation of breast cancer. For the search of locoregional or distant recurrence, the performance of FDG-PET are very interesting. The impact of FDG-PET on the therapeutic management is undeniable. For therapeutic evaluation, this imaging is useful to evaluate the neoadjuvant chemotherapy and hormonotherapy efficacy. FDG-PET is indicated in cases of suspected recurrence (clinical, biological or imaging suspicious). It is the most sensitive exam for the detection of bone or visceral metastases. It allows the re-staging during a relapse proved whether local or remote, and can change the therapeutic management.     

Etude du maintien de l’état vivacechezTeucrium Scorodonia L. (Labiée)

1. 1.
   Teucrium scorodonia L. je víceletá lody?natá rostlina, která vy?aduje nejméně osmitýdenní jarovizaci p?i 3°C teploty. Indukce a po?átek kvetení probíhají na dlouhém dni.     
   
   

Isorthid AE (Brachiopoda) du dévonien inférieur du massif armoricain

Three species of Isorthidae are described in the Lower Devonian of the Armorican Massif. Two of them were hitherto badly known, being never adequately described nor figured: Isorthis (Protocortezorthis) miloni from the Gahard Formation (Gedinnian) and Isorthis (Protocortezorthis) trigeri from the Saint-Céneré Formation (Gedinnian-Siegenian). Isorthis oehlertiSolle, 1976 is considered as a synonym of Isorthis (Protocortezorthis) trigeri. The geographic distribution of these species allows to corroborate that until the top of the Lower Devonian (top of Le Faou Formation), two provinces with different faunal associations exist in the Armorican Massif.     

Signification paléoécologique et paléogéographique des bivalves du Carbonifère inférieur du bassin d’Ancenis (Massif armoricain)

Palaeoecological and palaeogeographical inferences from Early Carboniferous bivalves of the Ancenis Basin (Variscan belt, France). In the basal part of the Ancenis Formation, of Dinantian age, greenish to purple mudstones display a few bivalves, assigned to the genera Lithophaga, Modiolus, and Naiadites. Because Naiadites is considered to be a non-marine bivalve, and is only previously reported in Scotland in Dinantian rocks, a brackish environment can be assumed for the Ancenis Basin during the Early Carboniferous. To cite this article: M. Ballèvre, H. Lardeux, C. R. Palevol 4 (2005).     

La redécouverte du site de Moulin Quignon (Somme) et les premiers Acheuléens du Nord-Ouest de l’Europe (650 ka)

New surveys were undertaken in Abbeville in 2016 and 2017 on the site of the Moulin Quignon discovered before 1850 by Boucher de Perthes, relocated thanks to the archival work carried out by MNHN researchers. This research led 150 years later to the rediscovery of this emblematic Paleolithic site. Test pits and extensive excavation have led to the discovery of alluvial levels in situ and a lithic series composed of 254 fragments, 15 cores and 5 bifaces. The cores and flakes attest to in situ debitage on flint nodules according mainly to unipolar and centripetal unifacial technology, except for one core, which indicates a management on several debitage surfaces. The bifaces are diversified morphologically and technically (shaping modes). They attest to a general management of the bifacial volume and geometry of the tool, to the care taken at the tip of the tool and to the regularisation of the often peripheral edges. They resemble those discovered by Boucher de Perthes in 1837–1868 and described in the past as “Abbevillian”. Stratigraphic and ESR age studies on quartz date human occupation between 670 and 650 ka. These artifacts belong to the earliest Acheulean occupation ever dated in the Somme basin and more generally north of the 50th parallel north. The lithic series discovered at Moulin Quignon is indisputable proof of the presence of human occupations dated at more than 650 ka in the Somme valley, a natural pathway to northern sectors, present-day Great Britain. This discovery thus ages (1) the age of the oldest occupation in the North of France (previously 550 ka) and (2) the age of the oldest bifaces for Northwest Europe (100 ka older than the bifaces in Great Britain).     

Interprétation paléogéographique des données palynologiques du site du Paléolithique supérieur de Mezhyrich (Ukraine)

The results of palynological study of the Upper Paleolithic Mezhyrich site in central Ukraine are presented. Four local pollen zones were identified. The results of the palynological investigations allow us to hypothesize that the plant cover during Upper Paleolithic had a mosaic structure. The pollen record shows the presence of a few tree species with the predominance of herbaceous plants. We suggest that the river valleys and other local favorable sites were natural refugia where forest elements could survive even during the Last Glacial Maximum. These favorable landscapes to the existence of prehistoric hunters may have persisted during the Last Pleniglacial.     

Nouvelles données sur l’évolution paléoclimatique de l’époque magdalénienne,d’après l’étude lithostratigraphique du Roc-aux-Sorciers (Angles-sur-l’Anglin,Vienne, France)

Situated a few kilometres from Angles-sur-Anglin (Vienne, France), the Roc-aux-Sorciers cave has yielded in 1927 and 1950 industry of the Middle and Upper Magdalenian periods. Our analyses of the sedimentary filling, dated from isotope stage 2, demonstrate the existence of two climatic sequences in the six ensembles defined during the excavations. A first sequence, at the base of the cave filling, corresponds to the occupation levels of the Middle Magdalenian and of the early Upper Magdalenian. At that time, the climate was globally cold and particularly humid, a conclusion that does not support Bastin's 1975 hypothesis on the oscillation of Angles-sur-Anglin, which postulates a mild and humid climate. In fact, the climate evolved progressively towards a slight warming from the base to the top of the stratigraphy. During the second sequence, corresponding to the occupation period of the Upper Magdalenian, the relatively stable climate was slightly warmer and quite humid. Stratigraphical and sedimentological data thus provide new information on the conditions under which the filling was deposited and on the palaeoclimatology of the Poitou-Charentes region during Magdalenian occupation.     

Bryozoaires cheilostomes nouveaux du Miocène supérieur du Bassin d'Alboran (Méditerranée occidentale)

Three new species and one new subspecies, Tremogasterinacookae, Cribrilina messiniensis, Emballotheca mediterranea and Herentia thalassae alboransis (Bryozoa, Cheilostomata) are described from various Messinian deposits (Uppermost Miocene) of the Mediterranean province of Alboran: Algeria, Morocco, Spain.     

Les Crustacés décapodes du Messinien récifal d'Oranie (Algérie)

The Messinian coral reefs of Oranie (western Algeria) often contain determinable remnants of decapods (carapaces, chelae). Six species are mentioned, all of them for the first time from the Upper Miocene of Algeria. Further, a new species (Lachnopodus murdjadjensis) is proposed. This decapod association seems to be a characteristic reefdwelling one. Its affinities are discussed.     

Innervation du muscle rétracteur antérieur du byssus (ABRM) de Mytilus edulis L.

Summary Detection of nerve structures containing 5-HT were described in the anterior byssus retractor muscle (ABRM) in Mytilus edulis L. after using the fluorescence microscope technique of Falck. We are able to confirm our previous results and assumptions given by histology and electron microscope studies: the neuromuscular en passage junctions, largely distributed within the ABRM, contain 5-HT.     

Les sclérobiontes des huîtres du Cénomanien supérieur du Mans (Sarthe,France)

Oysters of the Marnes à Pycnodonte biauriculata Formation, Upper Cenomanian (Guerangeri biozone) were significantly sampled in building works within the town of Le Mans (Sarthe, France). They are colonized by episkeletobionts (encrusting organisms) and endoskeletobionts (boring and bioeroding organisms). First ones include bivalves, polychaetes, foraminiferans and bryozoans. Second ones are represented by about fifteen ichnotaxa, the producers of which, when they are known, belong to ten taxa. The oysters, some of which have a large fixation surface, are allochtonous or at least parautochtonous. The settlement of sclerobionts began when the oysters were alive (Entobia isp.) and continued post-mortem on isolated valves, transported in their final depositional environment (Gnathichnus pentax). The significance of the coexistence of both Entobia and Gnathichnus ichnocoenosis is discussed.     

Premières données sur les Ostracodes du Cénomanien deYougoslavie (istrie du sud)

enAn Upper Cenomanian Ostracode assemblage has been identified near Premantura, South Istria (Yougoslavia), in an internal carbonate platform deposit. This appears of peculiar interest because of lack of datas concerning this area during the Cretaceous. Systematical studies are proposed and two new species erected: Rehacythereis apulicus nov.sp and Perissocytheridea istriana nov.sp. Some attempts are given upon paleoenvironments and paleobiogeographical signification.     

Deux fougères fertiles du Stéphanien du Massif Central (France)

Two fertile ferns from the Stephanian of the Massif Central (France) are described in detail. One has been found in the Blanzy basin and is assigned to Oligocarpia (Sphenopteris) leptophylla (Bunbury) nov. comb., according to the morphology of the sterile pinnae and of the fructifications. Its spores agree with the «sporae dispersae Granulatisporites parvus (Ibr.) Potonié and Kremp. The other fern has been collected in the St Etienne basin and is assigned to Senftenbergia plumosa (Artis) Radforth var. ligerensis nov. var. Its spores agree with the morphographic genus Raistrickia (S., W. and B.) Potonié and Kremp but do not look like any described species; therefore the new species name R. polymorpha nov. sp. has been given to that spore.     

Proposition d’une nouvelle biozonation par ammonites de l’Albien du Bassin andin (Pérou)

The study of the ammonite fauna of the Albian formations allows a major revision of its biostratigraphic frame in northern and central Peru. A carving in ammonite biozones is proposed for the Inca, Chulec and Pariatambo Formations and the Pulluicana group. The Lower Albian is represented by the Nicholsoni Biozone (subdivided into the umbilicostatus, and nicholsoni biohorizons, followed by an interval subzone) and by the Raimondii Biozone (carved in three subzones: Haasi, Raimondii – itself subdivided into the ebrayi and alternum biohorizons – and Mathewsi, including the pseudolyelli biohorizon). The Middle Albian is characterised by the Carbonarium Biozone, carved in the Ulrichi and Carbonarium Subzones. The base of Upper Albian is represented by the Cristatum Subzone.     

Reconstitution du substratum jurassique-crétacé basal du domaine des Sellaoua (marge sud-téthysienne,Algérie nord-orientale) à partir des galets du bassin mio-pliocène d’Hamman N’Baïls

The Mio-Pliocene series filling up the intermontane basin of Hammam N’Baïls (Guelma region, NE Algeria) corresponds to a fluviatile sequence beginning by polygenic conglomerates that contain several Mesozoic carbonate pebbles. The inventory and the micropalaeontological study of these pebbles attest the occurrence, at the base of the Sellaoua unit (southern Tellian foreland of Maghrebides), of a Jurassic–Berriasian carbonate-dominated series, unknown in outcrops, showing some affinities with the synchronous North-Atlasic Algerian and Tunisian ones respectively to the W-SW and to the E-NE. This series was deposited on the South-Tethyan margin, to the south of the ‘Tethyan trough’ joining the incipient Atlantic Ocean and the Ligurian Ocean. The Upper Miocene and Pliocene extensional tectonics and the halokinetic motions, induced by the presence of large Triassic evaporites masses, have probably uplifted towards the surface this Mesozoic Sellaoua-type material, which, after erosion, has supplied the herein studied fluviatile conglomerates.