Commingled human skeletons have the potential to reveal information about ancient funerary traditions through detailed bioarchaeological analyses of element representation (via minimum number of individuals, or MNI) and postmortem distribution. While MNI estimates are often presented in a perfunctory way, calculations using more nuanced methods may offer insight into taphonomic alteration and mortuary practices no longer visible to archaeologists. At the Early Bronze Age communal tombs of Unar 1 and 2 at the Shimal Necropolis in Ras al-Khaimah, United Arab Emirates (UAE), MNI counts using skull, leg, and foot fragments varied dramatically, probably a result of differences in cortical bone density but also of cremation practices. Additionally, the presence of more elements from the left side of the skeleton suggests continuity with Neolithic interments in which individuals were preferentially laid on their right sides. Complex arrays of internal tomb chambers likewise demonstrate no particular preference for certain skeletal elements, indicating bone was not intentionally relocated to different areas of the tomb following cremation. These patterns differ from other tombs in the region, highlighting the need to more critically assess mortuary practices through “back-to-basics” approaches involving MNI estimates, particularly when involving large numbers of individuals represented by commingled and fragmentary bone.

San Sebastián Bay, in southern South America, is an emblematic area because it represents a conflict of interest between the conservation of migratory birds and marine species and the exploitation of hydrocarbons. Given the little information available about the intertidal benthic communities in this bay, this study aims to analyse shell assemblages recovered from the beach, examining drilling and crushing predation on mollusc shells. Two bivalves, Darina solenoides and Mactra fuegiensis, are being preyed upon by three potential drilling predators: the naticid Falsilunatia limbata and the muricids Xymenopsis muriciformis and Trophon geversianus. The intensity of drilling predation was high in both bivalve prey, being higher in M. fuegiensis (27.4%) than in D. solenoides (18.8%). Additionally, there was no preference observed for a particular prey size and there was also no significant correlation between the size of the prey and the predator. However, site selectivity indicated that the predator showed a preference for the central sector in D. solenoides and the umbonal sector in M. fuegiensis, that could be explained by the life modes of both prey and how they are manipulated by their predators. Finally, regarding crushing predation, the shell condition of a significant number of muricids indicates damage most probably caused by decapod crabs. This work provides valuable insights into the biotic interactions within the intertidal communities of San Sebastián Bay, located in the cold-temperate Magellanic Region. It highlights the necessity for continued research and monitoring, particularly in an already conflictive context aggravated by climate change.

The limestone and marlstone succession of the Pliensbachian Vale das Fontes and Lemede formations at the Global Boundary Stratotype Section and Point (GSSP) at Peniche (Portugal) received much attention in numerous studies. It contains abundant pyritic and limonitic aggregates, which are herein described and interpreted as remarkably preserved soft-bodied organisms (worms) for the first time. The slender to compact bodies with a cylindrical or dorsoventrally flattened cross-section are several centimetres long and have a diametre/width of 0.5–8 mm. They occur on bedding planes or are partly preserved within their burrows. Although their taphonomic history did not favour the preservation of many details, key features such as body shape, size and composition, as well as occasionally preserved segmentation and body appendages, allow a rough assignment to the phyla Nemertea, Annelida and Nematoda. Favourable circumstances such as intermittent dysoxic to anoxic bottom conditions, microbial activity and sudden burial have probably contributed to a reduced decay of the soft bodies. Comparison with similar successions globally shows that such a preservation of worms is not a unique process but occurs in several thick, fine-grained units throughout the Phanerozoic. Such inadequately preserved soft-bodied animals are still often overlooked but have the potential to add to our knowledge of the distribution and evolution of major clades of non-skeletal organisms.

The Lower Jurassic (Toarcian) Posidonienschiefer Formation of southwestern Germany is a classic konservat lagerstätte, yielding some of the world’s best-preserved fossils of marine vertebrates, including ichthyosaurs, thalattosuchian crocodylomorphs, plesiosaurs and fishes. Despite numerous studies concentrating on the taphonomy of ichthyosaurs in this formation, less taphonomic work has focussed on the thalattosuchians of the assemblage. Multiple thalattosuchian species displaying a wide range of body sizes have been recovered. We investigated indicators for seafloor arrival position in thirteen Macrospondylus bollensis and one Platysuchus multiscrobiculatus specimens representing various body sizes using three-dimensional (3D) photogrammetric models. False-colour depth maps were used to interpret the relative topography (depth level) of bone penetration into the sediment and were aligned on the XY plane, making them parallel to the stratigraphic plane. Our results show both headfirst and non-headfirst seafloor arrivals in observed specimens, with headfirst seafloor arrivals exhibiting deeply buried skulls, displacement of select cervical vertebrae and/or characteristic fractures in the cranium and mandible. We (1) interpret seafloor landing types in teleosauroids; (2) recognize and list specific characteristics that are consistently attributed to either a headfirst or non-headfirst seafloor arrival; (3) discuss possible factors that may have contributed to these features, such as body shape and size, substrate and velocity; and (4) provide a new definition for headfirst seafloor arrival that can be readily attributed to other marine vertebrates from various formations. Lastly, our results show that observers must carefully consider how historical specimens might have been prepared, as this may influence taphonomic interpretations.

Recent genomic analysis of a skull fragment from Newgrange, Ireland, revealed a rare case of incest. Together with a wider network of distantly related passage tomb interments, this has bolstered claims of a social elite in later Neolithic Ireland. Here, the authors evaluate this social evolutionary interpretation, drawing on insecurities in context and the relative rarity of engendered status or resource restrictions in the archaeological record of prehistoric Ireland to argue that the status of individuals during this period is better understood through unstable identity negotiations. Inclusion in a passage tomb, while ‘special’, need not equate to a perpetual elite.

Este trabajo aborda el estudio de la localidad arqueológica Cerro de los Gatos (Tierra del Fuego, Argentina), emplazada en un sector formado luego de la transgresión marina del Holoceno medio. Se exploran las transformaciones naturales y culturales del paisaje a nivel local y regional. Los aspectos presentados y evaluados aquí incluyen (1) tafonomía y evolución geomorfológica de loci diferentes, (2) disponibilidad de recursos y ecología isotópica, (3) tecnología lítica y ósea, (4) registro bioarqueológico humano y faunístico, y (5) cronología y reconstrucción paleoambiental del paisaje costero. Nuestra investigación sugiere que el registro de las ocupaciones humanas y el devenir de los paisajes naturales y culturales de la Bahía San Sebastián son el resultado combinado de la segregación espacial de las actividades (de subsistencia, tecnológicas, rituales) y sus trayectorias tafonómicas durante el Holoceno tardío.

When archaeologists discuss ‘ancestor cults’ or ‘ancestor veneration’, what this might entail in practice usually remains vague, leading to charges that the concept of ‘ancestors’ is often applied generically. In this article, the authors combine bioarchaeological, taphonomic, radiocarbon, and isotopic studies to explore the ritual practice of the selective retention, curation, and deposition of a group of human crania and mandibles. Between 5500–5400 bc, Neolithic people at Masseria Candelaro (Puglia, Italy) deposited broken crania and mandibles from about fifteen individuals in a heap in the centre of the village. These individuals were mostly probable males, collected over the course of two centuries and actively used, with their deposition marking the final disposal of a ritual collection. The motivations for the curation of cranial bone are investigated through comparison with archaeological and ethnographic examples, advancing an interpretation of ritual practice directed towards ancestors.

This paper uses a case study of a shaft in Surrey, England, to illustrate the potential of traditionally overlooked material for increasing understanding of Romano-British minority mortuary rituals. Taphonomic analysis of a substantial assemblage of disarticulated human remains from a first-century a.d. quarry from the Nescot Former Animal Husbandry Centre in Ewell, Surrey, showed evidence of multi-stage post-mortem processing. This included decomposition of the remains within a protected environment followed by removal of certain skeletal elements. The assemblage is then contextualised against the treatment of human remains in other Romano-British shaft and well deposits. Finally, the material is compared to Iron Age examples of post-mortem processing, revealing the Nescot shaft is unlikely to be a direct continuation of pre-conquest practices.

En este trabajo se presentan los resultados del análisis de los restos faunísticos de Hangar, un sitio arqueológico ubicado en la región pampeana argentina. Los fechados realizados sobre huesos de guanaco sitúan cronológicamente a las ocupaciones humanas en el Holoceno tardío final, período escasamente representado en el área. Los análisis tafonómicos y estratigráficos indican que el sitio presenta complejos procesos de formación, con una baja integridad, aunque con buena resolución. Los principales procesos que afectaron a los restos fueron la bioturbación y las tareas de laboreo de la tierra. Las evidencias aportadas por Hangar muestran la explotación de distintos taxones, entre los que se destacan el guanaco, el venado de las Pampas, la vizcacha, el peludo y el ñandú. Estos datos constituyen un importante insumo para el creciente avance en el conocimiento de la subsistencia de los cazadores-recolectores que habitaron la región pampeana. En particular, los fechados-taxón obtenidos aportan nuevos datos para la discusión acerca de la retracción del guanaco en momentos tardíos en el área Interserrana bonaerense.

This article presents the results of a preliminary bioarchaeological study of 10 funerary urns containing human burned remains from the Los Tamarindos urn-field cemetery dated to the Postclassic period. I was able to determine the basic biological profile data. In addition, I determined the fragmentation rate as well as the thermal alternation of bones from funerary urns from Los Tamarindos, which allowed me to propose the first observations about the Pretarascan cremation burial practices in this region. The low weight of bones indicates that burials should be determined as partial burials; however, they contain fragments of bones from each anatomical region. The structure of the bones and the chromatic discoloration caused by the thermal alternation indicate that temperature during the cremation did not exceed 900°C, given that the cremains did not exhibit the recrystallization structure, which is interpreted as a characteristic feature of the high maximum temperature of a funerary pyre during the cremation.

Pollen preserved in caves provides a little-appreciated opportunity to study past vegetation and climate changes in regions where conventional wetland sediments are either unavailable, contain little organic matter, and/or are difficult to date accurately. Most palynology in caves has focused on clastic infill sediments, but pollen preserved in growing speleothems provides important new opportunities to develop vegetation and climatic records that can be dated accurately with radiometric methods. However, when pollen is present in speleothems, concentrations can vary by orders of magnitude, highlighting how little we know about the processes that transport pollen into caves and onto speleothem surfaces, and that determine the pollen's preservation probability. To explore these aspects of speleothem pollen taphonomy, we investigated the distribution of pollen and microscopic charcoal within several stalagmites from southwest Australia. We examined spatial patterns in pollen and charcoal preservation in order to distinguish whether observed gradients result from preservation or are products of systematic transport processes working along stalagmite surfaces. We find that pollen grains and charcoal fragments are located preferentially on the flanks of most stalagmites. This suggests that pollen grain and charcoal deposition on speleothems is influenced by transport and accumulation of detrital debris on growing surfaces. These insights will assist in future sampling campaigns focusing on speleothem pollen and charcoal contents.

In 2020, a unique bone assemblage was found at the Late Paleolithic site Volchia Griva. Its base is made of a distal mammoth femur minus epiphysis, in which a cavity has been hollowed out. Impact notches along the edges of the cavity and holes in the metaphysis prove the human-made nature of this specimen. A portion of a polar fox cranium, half of a fox hemimandible, a fox tooth, and a large mammal rib fragment were enclosed in the cavity. The mammoth femur was previously used as a retoucher, as evinced by the impressions and cut marks. Incisions were detected on the polar fox cranium, indicating skinning. According to two 14C dates, the age of the remains is 19.3–19.1 ka BP. Palynological analysis of the cavity fill shows a forb-grass steppe at that time. The assemblage, which has no known analogues, is a reflection of prehistoric culture. This extraordinary find most likely is evidence of the ritual behavior of people who lived in the south of Western Siberia during the last glacial maximum. The assemblage was accompanied by a large number of fox remains, and lithic artifacts identical to bladelet-based Late Paleolithic industries of Siberia and the Middle Urals.

Many studies have improved our understanding of the mode of preservation at the Crato fossil Lagerstätte. The high degree of preservation of the Crato mineralized insects is thought to be a consequence of the diffusion of ions through carcasses and envelopment by bacteria that, in turn, created microenvironmental conditions that led to mineralization, mainly pyritization. Pyritized insects have been oxidized by in situ weathering to more stable oxide/hydroxy minerals during Quaternary time. This transformation is essential to maintain the palaeontological information acquired during microbially induced pyritization in an oxidizing atmosphere. However, intense weathering can diminish or obscure the morphological fidelity, and little attention has been paid to the post-diagenetic processes experienced by these fossils. Here, we aim to determine the degree of alteration undergone by Crato pyritized insects using the following combination of analytical tools: scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared and Raman spectroscopy. Our results show that well-preserved insects are preferentially replaced by haematite and poorly preserved fossils are replaced by goethite. In addition, we recorded three types of post-diagenetic alteration: insects with iron-oxide overgrowths; insects associated with black coatings, sometimes with the formation of dendrites; and insects preserved as an impression, where only the outline of the body remains. All of these alterations have the potential to distort or tarnish palaeontological information. Here, we measured the effects of such telodiagenetic alterations at macro and micro scales. Therefore, this taphonomic approach has wide applicability wherever fine-grained deposits bearing mineralized insects are found.

The Ediacaran rangeomorph Fractofusus misrai is the most common and best-preserved of the E Surface fossil assemblage in the Mistaken Point Ecological Reserve of southeastern Newfoundland, Canada. Fractofusus has been interpreted as a fusiform epifaunal soft-sediment recliner, and like other rangeomorphs it has a self-similar, fractal-like branching morphology. The rangeomorph branching of Fractofusus has been considered to be identical on the upper and lower surfaces; however, study of specimens with complex biostratinomic histories suggests clear differences between the upper and lower surfaces. The first-order branches grew downwards into the sediment from a high point near the midline but grew above the sediment–water interface at their lateral and distal margins. Our new three-dimensional appreciation of rangeomorph branching in Fractofusus explains many of the taphomorphs of Fractofusus including straight, curved, kinked and tousled forms. The three-dimensional morphology, mode of life, taphonomy and palaeoenvironmental interactions of F. misrai are discussed along with a new three-dimensional reconstruction.

Fossil feathers have greatly improved our understanding of the evolutionary transition from non-avian dinosaurs to birds and the evolution of feathers, and may be the only evidence for their source animals in the fossil record. Hot spring environments have been demonstrated to be conducive to the preservation of fossils, but internal silicification of feathers was not observed in the only avian carcass so far discovered in ancient hot spring deposits. To determine whether feathers can be internally silicified, here we analyse feathers sampled from a modern hot spring vent pool – Champagne Pool – in New Zealand. Our results of scanning electron microscopy (SEM)-energy dispersive X-ray spectrometry elemental mapping show that the sampled feathers are silicified to different degrees, and one of them is pervasively silicified. SEM observations show that feathers can be silicified at the cellular level. Degradation is involved in the silicification of feathers, as indicated by the reduction of the abundance of carbon and the loss of keratin fibrils. Our findings suggest that ancient deposits of hot spring vent pools are promising targets in search for fossil feathers.

This paper describes the results of research at Volchia Griva, the largest site in Asia containing mammoth fauna in situ. It is situated in the south of the West Siberian Plain in the Baraba forest-steppe zone, and occupies an area of several hectares. Analysis of sediments and taphonomy of the site allows us to suggest that thousands of megafaunal remains were buried here in mud pits and erosional depressions. The favorable geochemical landscape of Volchia Griva attracted animals during periods of mineral starvation. This is reflected in the high mortality in two intervals, ca. 20–18 14C ka BP and ca. 17–11 14C ka BP. The results of palynological analysis of samples from the upper part of the Volchia Griva section made it possible to reconstruct the history of landscape changes of the Baraba Lowland during the MIS 2. Forb-mesophytic meadows were common at the beginning of this period, with taiga type forests. At ca. 20 14C ka BP, an abrupt and significant aridization of the climate occurred, which led to the degradation of forests. The mammoth steppe was widely developed, dominated by forb-grass association and with areas of alkali meadows and soils. Such conditions existed probably until the mid-Holocene.

The role of plant foods during the fluted-point period (FPP) of North America is contested. Central to this debate is whether the scarcity of FPP macrobotanical materials stems from poor preservation of archaeological features and the macrobotanical remains they might contain or from the limited use of plants during the FPP. Employing summed probability distributions of radiocarbon date frequencies in northeastern North America, we find that FPP hearths are as common as expected, given the small number of well-dated FPP sites in the region. A second comparison shows that northeastern FPP hearths contain macrobotanical remains at a higher frequency than hearths from a region with better preservation and where small seeds formed a part of the diet. The macrobotanical materials so far recovered from FPP hearths in the Northeast show that plant foods contributed to diets during the FPP but that the plant diet breadth was relatively narrow, consistent with a specialized caribou hunting lifeway.