Ungulate carcass transport strategies at the Middle Palaeolithic site of Abric Romaní (Capellades,Spain)

We evaluated the skeletal profiles from several levels of the Neanderthal site of Abric Romaní, focusing on the methodology proposed by Faith and Gordon (2007): differences in the skeletal distribution of animals in accordance with their size and weight; the statistical correlation between the skeletal profiles and standard food utility index; and the anatomical diversity of size-weight categories. Results indicate an unconstrained transport strategy in all levels and all size-weight categories. However, we also found differences in the skeletal distribution of medium-sized and large animals, which may be due to different transport strategies. These characteristics suggest that the superposition of transport and occupation events could be responsible for our results. In addition, we applied the same analysis to Hadza assemblages, which revealed similar results to those found at Abric Romaní. The most striking feature of the Hadza assemblages examined is the superposition of transport events as a result of successive occupation/deposition events. This suggests that the transport strategies used by Neanderthals at Abric Romaní are also characterized by a high degree of diversity in transport decisions.     

Blades,bladelets and flakes: A case of variability in tool design at the dawn of the Middle–Upper Palaeolithic transition in Italy

Neanderthals left diverse sets of cultural evidence just before the Middle–Upper Palaeolithic transition in Europe. Within this evidence, the production of lithic implements plays a key role in detecting possible affiliations (or lack thereof) with the techno-complexes that occurred during the few millennia before the large-scale spread of the Proto-Aurignacian. This crucial phase has also been recorded in the North of Italy, where around 44–45 ky cal BP, the last Neanderthals were still using the Levallois knapping technique, in common with the technology adopted at several sites in the central Mediterranean region. A similar picture is seen at the Grotta di Fumane, which provides the evidence presented in this paper. The production technology employed produced different levels of variability with respect to the production of blades, sometimes pointed, and the use of recurrent centripetal flaking at the end of the reduction sequence, in addition to bladelet and Discoidal volumetric structures. This variability does not outweigh the dominant tendency towards the use of elongated Levallois blanks and other by-products for shaping into basic retouched tools such as simple or convergent scrapers and points. A break from this apparently well-rooted use of the unipolar Levallois method is recorded in the Uluzzian where, instead, flakes and cores were made using the centripetal modality.     

Neanderthal mobility and technological change in the northeastern of the Iberian Peninsula: The patterns of chert exploitation at the Abric Romaní rock-shelter

Understanding the changes in the technological organization of prehistoric hunter–gatherers is important to research into hominin foraging activities. During the Middle Paleolithic, the coexistence or the replacement between Levallois and discoid technologies has frequently been recorded, but there is still no clear understanding of the reasons for their alternating and fragmented use in the archaeological record. This paper aims to contribute with new data to the current debate, by exploring the chert assemblages from levels O and M of the Abric Romaní rock-shelter. The results reveal that the change from Levallois in level O to discoid in level M is accompanied by the use of different axes of mobility, a reduction in the foraging radius and a more careful management of raw materials. A cross comparison with other archaeological evidences indicates the general pattern in the Northeast of the Iberian Peninsula during the late Middle Paleolithic, in which the use of Levallois technology is associated with chert and high mobility patterns whereas discoid technology is more closely linked to the use of local raw materials and a lower degree of mobility. The modifications to the mountainous environments and to the distribution of preferred prey animals may have influenced the Neanderthals’ mobility patterns and contributed to modifying their technical behaviours in order to obtain better foraging incomes.     

Zooarchaeological analysis of the Raşcov 8 Upper Palaeolithic site (Republic of Moldova)

The Palaeolithic site of Raşcov 8, discovered in the 1950's, was recently subjected to new investigations. It yielded archaeological layers from the Upper Pleniglacial. We used zooarchaeological methods to deepen knowledge about this site. We focused on the taphonomy, the anatomical representation of the different species and the anthropogenic activities to better determine the use of natural resources by humans, in particular of animal origin, to understand which strategies were used, the technocultural practices and territory occupation. The taphonomic observations are quite typical of a dry and cold environment. They also suggest that the 3 and 3a layers result from the same or chronogically closely occupations, affected by soil movements. Concerning the anthropogenic features, repeated short-term occupations, on a seasonal basis, mainly hunting and butchering activities of one or several small human groups have been highlighted. Whereas in the older layer humans exploited the carcass of a mammoth, in the other layers they hunted reindeer and horses and butchered the carcasses on the site, probably transporting some parts elsewhere. Whereas the lithic industries are different between layers 4/3-3a (Epiaurignacian) and 2/1 (Epigravettian), the subsistence behavior is similar and quite typical of Molodovian.     

Recent records of the Nile Soft-shelled Turtle,Tríonyx triunguis,and of the Euphrates Soft-shelled Turtle,Tríonyx euphratìcus,in the Middle East

Abstract

Thriving populations of the Spiny Oyster Spondylus spinosus Schreibers, 1793, an Indo-Pacific bivalve, are reported from off the Mediterranean coast of Israel. The taxonomy and nomenclature of this new Lessepsian migrant are briefly discussed. The polymorphism of the Mediterranean specimens is discussed. Their habitat is described, and the epibionts and predators in the Mediterranean are enumerated.     

Seasonal variations of the middle-upper paleolithic transition at El castillo, Cueva Morín and El pendo (Cantabria, Spain)

With debate escalating in regard to the prolonged contemporaneity of neandertal and modern human groups in the Franco-Cantabrian region on the one hand, and the late persistence of neandertals (until ca. 28-30,000 B.P.) and Mousterian industries in southern Iberia on the other; sites with Mousterian-Upper Paleolithic sequences from northern Spain play a pivotal role in the ongoing investigation of the Middle-Upper Paleolithic transition in western Europe. An important line of inquiry into the nature of social and economic change from the Middle to Upper Paleolithic is the monitoring of shifts in land use and resource procurement patterns. The recognition of short-term, seasonal patterning in settlement and resource provisioning may provide insights into changes in mobility, territoriality, and social organization that might otherwise be missed. This paper presents results of a seasonality study of fauna from archaeological levels spanning the Middle-Upper Paleolithic transition from the sites of El Castillo, El Pendo, and Cueva Morín in Cantabrian Spain. Data concerning season of death and age at death of prey animals presented here are derived from dental growth mark (increment, annuli) analysis. These data, along with other artifactual and faunal evidence suggest to us that: (1) economic strategies and technologies pervasive in the Upper Paleolithic are rooted in the Cantabrian Middle Paleolithic; and, (2) the apparent increase in deposits from the Middle through Upper Paleolithic may be the signature of a gradual increase in logistical economic strategies including the heightened level of social organization required for their implementation.     

Before the transition? The final middle Palaeolithic lithic industry from the Grotte du Renne (layer XI) at Arcy-sur-Cure (Burgundy,France)

The Grotte du Renne at Arcy-sur-Cure (Burgundy, France) has yielded remains from several occupation layers, extending from the end of the middle Palaeolithic to the upper Palaeolithic. The last Mousterian layer (XI), which precedes the Châtelperronian occupations (layers Xa, Xb, Xc, IX, VIII), was previously interpreted as a precursor of the transition complex. The new study of the lithic assemblage of layer XI, in the context of the other final Mousterian occupations in Arcy (Grotte du Bison, Galerie Schoepflin Rotonde, Grotte de l’Hyène) challenges this hypothesis. The Mousterian Arcy complex can be divided into three main techno-complexes: Levallois–Charentian, Discoid–Denticulate and Levallois Mousterian. We observed a rupture between the final Mousterian and Châtelperronian industries as regards all the aspects of the technical system; production methods, blank management, tool types, and some changes in raw material composition.     

Room at the top? Minority mobility and the transition to demographic diversity in the USA

We examine the ramifications of the demographic transition to diversity in the USA through an analysis of changes at the top of the occupational hierarchy, as glimpsed in recent census data. We find evidence that, among the incumbents of better-paid occupations, the percentage of non-Hispanic whites, the historically dominant majority, is sharply declining, while the proportion of immigrant-origin minorities, Asians, both foreign and US born, and US-born Hispanics, is growing. African Americans, or US-born blacks, are not so far sharing much in this growth. However, whites still retain important advantages in terms of occupational placement net of education and in terms of earnings net of occupational placement. We conclude overall that demographic shifts are highly likely to drive further diversification at the top of the US workforce; the question of whether whites can hold on to their advantages in the face of these changes cannot be answered yet.     

Reconstructing the palaeoenvironment of the Middle Russian Sea during the Middle–Late Jurassic transition using stable isotope ratios of cephalopod shells and variations in faunal assemblages

Oxygen and carbon isotope data of well-preserved belemnite rostra and ammonite shells are presented from the Callovian–Oxfordian boundary (uppermost Lamberti to lowermost Cordatum zones) of the Dubki section near Saratov in the Russian Platform. Palaeotemperatures calculated for nektobenthic belemnites (averages of 5 °C and 8 °C for cylindroteuthids and belemnopseids, respectively) show the presence of cold bottom waters in the central part of the Middle Russian Sea during the studied interval. Palaeotemperatures calculated for ammonites, which are assumed to have lived in near-surface waters, are considerably higher (average 13 °C). The presented data show a vertical thermal gradient in the Middle Russian Sea. The belemnite oxygen isotope record and the relative abundances of ammonite families in the Dubki section do not correlate with each other probably as a result of different depth habitats of ammonites and belemnites. A review of literature isotope data shows the climatic zonation in European seas at the Middle–Late Jurassic transition. Despite the flux of cold polar waters to the Middle Russian Sea and the area of Scotland there is no evidence for glaciation at the Middle–Late Jurassic transition. Changes in water circulation during a sea-level highstand were likely a source of spreads of cold bottom waters and cardioceratid ammonite fauna in this time period.The belemnite isotope record of the Callovian–Oxfordian boundary in the Russian Platform is characterized by significant scatter of δ¹³C values. No temporal carbon isotope trend is observed. The δ¹³C values of Russian belemnite rostra average 2.6‰ VPDB being 1 to 2‰ higher than the values of coeval Lower Oxfordian belemnites from the area of the Submediterranean ammonite province. Higher (than Submediterranean) δ¹³C values of Russian belemnite rostra are likely related to high biologic productivity and/or high organic matter burial in semi-isolated Boreal–Subboreal marine basins.     

Middle Albian gymnosperms from the Río Martín Valley (Teruel,Spain)

The fossil-rich site within the Albian Escucha Formation in the Oliete Sub-basin, located in the Northeast of Spain, has provided a great abundance of impressions, including leave remains and seed cones of Coniferales (Sphenolepis kurriana, Sphenolepis sternbergiana, Elatides curvifolia, Brachyphyllum sp. and Geinitzia sp. cf. G. rigida), leaves of Caytoniales (Sagenopteris elliptica), Ginkgoales (Ginkgoites pluripartita, and Sphenobaiera sp. cf. S. longifolia), Bennettitales (Ptilophyllum sp. cf. P. pecten and aff. Zamites sp.), Cycadales (Nilssonia tenuinervis and Ctenozamites with entire and denticulate pinnae margins), Czekanowskiales, and reproductive structures of Gnetales. The gymnosperm remains are fairly abundant in the upper member, built up of sediments deposited in fluvial and swamp environments without marine influence. The different gymnosperm associations in this outcrop indicate a wide variety of environments in a subtropical climate, and a mixture of North American and European taxa in the Iberian plate during the Middle Albian.     

Pot casts in the Upper Muschelkalk (Middle Triassic) of Weimar/Thuringia—Composition,microfabrics and diagnesis

Summary A horizon with pot casts (potholes) is described from shallow-marine limestones of thespinosus-zone (‘Discitesschichten’, Upper Muschelkalk) near Weimar/Thuringia. The erosional structures are not developed as sole marks but occur as isolated structures. They differe distinctly in size and composition from pot casts described from the Muschelkalk of Southern Germany. Vertical sedimentary zonation and varying sediment infill in the structures suggest continuous erosion and deposition contemporaneous with the background sedimentation. Deposition may have been caused by oscillatory and unidirectional flows as well as a long period of micrite deposition. Early diagenetic deformations (e.g. dewatering, brecciation, pressure solution) have controlled by a higher continuous water flux inside the pot casts and higher intergranular dispersal pressure.     

Dephosphorylation of CaMKII at T253 controls the metaphase–anaphase transition

Calcium/calmodulin-stimulated protein kinase II (CaMKII) is a multi-functional serine/threonine protein kinase that controls a range of cellular functions, including proliferation. The biological properties of CaMKII are regulated by multi-site phosphorylation and targeting via interactions with specific proteins. To investigate the role specific CaMKII phosphorylation sites play in controlling cell proliferation and cell cycle progression, we examined phosphorylation of CaMKII at two sites (T253 and T286) at various stages of the cell cycle, and also examined the effects of overexpression of wild-type (WT), T286D phosphomimic, T253D phosphomimic and T253V phosphonull forms of CaMKIIα in MDA-MB-231 breast cancer and SHSY5Y neuroblastoma cells on cellular proliferation and cell cycle progression. We demonstrate herein that whilst there is no change in total CaMKII expression or T286 phosphorylation throughout the cell cycle, a marked dephosphorylation of CaMKII at T253 occurs during the G₂ and/or M phases. Additionally, we show by molecular inhibition, as well as pharmacological activation, that protein phosphatase 2A (PP2A) is the phosphatase responsible for this dephosphorylation. Furthermore, we show that inducible overexpression of WT, T286D and T253V forms of CaMKIIα in MDA-MB-231 and SHSY5Y cells increases cellular proliferation, with no alteration in cell cycle profiles. By contrast, overexpression of a T253D phosphomimic form of CaMKIIα significantly decreases proliferation, and cells accumulate in mitosis, specifically in metaphase. Taken together, these results strongly suggest that the dephosphorylation of CaMKII at T253 is involved in controlling the cell cycle, specifically the metaphase–anaphase transition.     

Paleosols and host rocks from the Middle–Upper Permian reference section of the Kazan Volga region,Russia: A case study

The Urzhumian (Wordian) and Severodvinian (Capitanian) reference section of the Monastery Ravine (Kazan Volga region, Russia), contains two siltstone lithofacies: (a) laminated and (b) massive. Depositional settings of the laminated siltstones can be interpreted as perennial to ephemeral lakes; depositional settings of the massive siltstones are interpreted as floodplains with soil cover and periodical silt influx in wet seasons. The bulk geochemistry of siliciclastics has revealed a high degree of weathering of both types of siltstone. The similar chemical composition, mineralogy, and grain size suggest the same provenance of silt material. Geochemical data indicate eastern source rocks, which are the Permian red beds of the Cis-Ural plains.The main genetic types of paleosols hosted in the massive siltstones in the studied section, include moderately developed Vertisols and Calcisols with drab-colored root traces, calcareous nodules, low chroma mottles, angular blocky peds and slickensides. These pedofeatures indicate in general a semi-arid climate with clear seasonality of rainfall. Major oxides of the paleosol matrix were used to estimate paleoprecipitation through the bases to alumina (ΣBases/Al) ratio and chemical index of alteration minus potassium (CIA-K) proxies. Estimates from Urzhumian paleosols indicate relatively low mean annual precipitation (MAP) of 390 mm/yr. The transition to the Severodvinian paleosols is marked by a noticeable MAP increase up to 777 mm/yr. This climate moistening coincides with changes in the morphology of paleosols from dolomitic with low redoximorphy to calcitic with gley horizons. The pedogenic carbonate nodules consisting of dolomicrite (5–10 μm) are very common in the Urzhumian paleosols and their morphology, micromorhology and isotopic features indicate the pedogenic origin of dolomite.Sedimentological and paleopedological features of the studied siltstones, as well as the location of the Volga-Ural basin in a mid-latitude position (25–32 °N) indicate a monsoonal character of precipitation during the Middle Permian.     

Sedimentology of the Upper Triassic reef complex at the Hochkönig Massif (Northern Calcareous Alps,Austria)

Summary The Upper Triassic Dachsteinkalk of the Hochk?nig Massif, situated 50 km south of Salzburg in the Northern Calcareous Alps, corresponds to a platform margin reef complex of exceptional thickness. The platform interior limestones form equally thick sequences of the well known cyclic Lofer facies. Sedimentation in the reef complex was not so strongly controlled by low-amplitude sea-level oscillations as was the Lofer facies. The westernmost of the 8 facies of the reef complex is an oncolite-dominated lagoon, in which wave-resistant stromatolite mounds with a relief of a few metres were periodically developed. The transition to the central reef area is accomplished across the back-reef facies. In the back-reef facies patch reefs and calcisponges appear. The proportion of coarse bioclastic sediment increases rapidly over a few hundred metres before the central reef area is encountered. The central reef area consists of relatively widely spaced small patch reefs that did not develop wave-resistant reef framework structures. The bulk of the sediment in the central reef area is coarse bioclastic material, provided by the dense growth of reef organisms and the wave-induced disintegration of patch reefs. Collapse of the reef margin is recorded by the supply of large blocks of patch reef material to the upper reef slope. Additionally, coarse, loose bioclastic debris was supplied to the upper reef slope and this was incorporated into debris flows on the reef slope and turbidites found at the base of the slope and in the off-reef facies. Partially lithified packstones and wackestones of the lower to middle reef slope were modified by mass movement to form breccia and rudstone sheets. The latter reach out hundreds of metres into the off-reef facies environment. A reef profile is presented which was derived by the restoration of strike and dip information. In conjunction with constraints imposed by sedimentary facies related to slope processes, the angle of slope in the reef margin area ranged from 11° to 5°, forming a concave (dished downwards) slope. Water depth estimations require that the central reef area did not develop in water of less than 10 metres depth. At the reef margin water depths were about 30 metres, at the base of the reef slope 200 metres and deepening in the off-reef facies to 250 metres. While previous work on reef complexes from this type of setting suggests growth in a heavily storm-dominated environment, the present author finds little evidence for the storm generation of the fore reef breccias, although there is good evidence for storm-influenced sedimentation and reworking in the central reef area. Post-depositional processes were characterised by continued slope processes causing brecciation and hydraulic injection of red internal sediments downwards into the reef slope and off-reef limestones. Hydrothermal circulation caused a number of phases of post-depositional (diagenetic) brecciation. There appears not to have been an important period of emergence at the Triassic/Jurassic boundary.     

Socioeconomic transition and physical growth of Tupí-Mondê Amerindian children of the Aripuan? Park, Brazilian Amazon

Anthropometric assessment of nutritional status is reported for three Tupí-Mondê-speaking groups from Rond?nia and Mato Grosso, Brazil. This region of the Amazon basin is experiencing rapid development through government-oriented colonization. The Gavi?o, Suruí, and Zoró had their first contacts with Brazilian national society at different times, and the nature and degree of their participation in regional markets varies. Height, weight, sitting height, subischial leg length, upper arm circumference, triceps skin-fold thickness, and upper arm muscle and fat areas are reported for children 0-10.9 years of age. Like other Amazonian Amerindians, Tupí-Mondê children are short for their age but normal or above normal in weight for height with respect to the National Center for Health Statistics reference. Hence stunting levels are high (55.4%) and wasting levels are low (0.8%). There are also deficits in body composition parameters, especially in upper arm circumference and estimated muscle and fat areas. We interpret the results as evidence of suboptimal nutritional status, reflecting the interaction between poor diet and infectious and parasitic diseases. The Gavi?o, with the longest period of contact, present the lowest level of stunting. This finding is attributed to the use of cash income from rubber tapping and nut gathering to purchase of food items and health care. Differences in height between the three groups are mostly due to leg length, instead of sitting height, reinforcing the idea that environmental conditions can alter body proportions.     

A theropod–sauropod track assemblage from the ?Middle–Upper Jurassic Shedian Formation at Shuangbai,Yunnan Province,China, reflecting different sizes of trackmakers: Review and new observations

A dinosaur tracksite at Hemenkou (Shuangbai County, Yunnan Province) in the ?Middle–Upper Jurassic Shedian Formation that consists mainly of gray-purple feldspathic quartz sandstones was previously reported incorrectly as being in the Lower Cretaceous Puchanghe Formation. The previous assignment is also inconsistent with two regional geological maps. Although mostly yielding poorly preserved tracks, the site nevertheless indicates a diversity of theropod and sauropod trackmakers partly consistent with the Late Jurassic body fossils from the region. Purported ornithopod are re-evaluated here as those of theropods. The theropod tracks and trackways show distinct similarities to those of the Grallator–Eubrontes plexus and can be subdivided into three morphotypes that may reflect different pes anatomy and/or substrate conditions. Two sizes of tracks (small, large) indicate the presence of different size classes or species in this area in the Late Jurassic. Similarly, the sauropod trackways document three differently sized trackmakers (small–medium–large) showing a typical wide-gauge (Brontopodus) pattern. The track record is the first evidence of theropods in the ?Middle–Late Jurassic of central Yunnan, whereas the sauropod tracks suggest a relation to the coeval basal eusauropods known from this region by skeletal remains.     

The mammary gland response to estradiol: monotonic at the cellular level, non-monotonic at the tissue-level of organization?

The role of hormones in mammary gland development has been studied in detail using surgical and genetic models. These studies have indicated roles for estrogen in ductal elongation and terminal end bud formation. However, no comprehensive study has quantified how different doses of estrogen affect morphological parameters of mammary gland development. Additionally, comparisons between the estrogen-responsiveness of the mammary gland and uterus, the model organ for estrogen action are incomplete. In this study, immature mice were ovariectomized and implanted with osmotic pumps releasing one of eight doses of 17β-estradiol for 10 days. As expected from the classical uterotrophic assay, the uterus showed a monotonic dose–response curve for all measured endpoints. In contrast, the mammary gland showed a non-monotonic, inverted-U shaped response to estrogen with regard to morphometric parameters, and a monotonic response with regard to gene expression parameters. These results indicate that estrogen has opposing effects in mammary gland morphogenesis depending on estrogen dose, i.e. low to moderate doses induce terminal end bud formation and ductal elongation while higher doses inhibit these processes. This non-monotonic dose–response in the mammary gland may reflect complex interactions, where estrogen can act on multiple targets either as an agonist or antagonist.