Why don’t we look to the west?

Paleontological data indicate that the beginning of Java Island’s human habitation took place at the Plio-Pleistocene boundary, around 2.4 Ma, along with uplift process and glacial-interglacial cycles. However, the oldest Homo erectus fossil was mainly found in the eastern part of Java Island where age-dating indicates that they were from ca. 1.5 Ma, especially along the riverbanks of Bengawan Solo and Brantas, such as Perning, Sangiran, Kedungbrubus, Ngandong, Ngawi, Trinil, and Sambungmacan.Recently, Pleistocene sites were discovered from the western part of Java, e.g., Rancah (Ciamis), Semedo (Tegal), and Bumiayu (Brebes) with their archeological, paleontological, and paleoanthropological potentials. This work will present the significance of the potential, especially paleoanthropological data from the new sites, and their implications to the Quaternary prehistory research strategies determination in the future.We present new geological, archeological, paleontological, and paleoanthropological evidence from those mentioned sites. The result shows that the distribution of Homo erectus were extended to the western part of Java, between 1.8-1.7 Ma, older than the oldest previous finding of Homo erectus from Perning and Sangiran. This finding suggests a new window of the human arrival on this island. So, why don’t we look to the west? Intensive research in the future should be addressed to the western part of Java Island.

RELIEF AND DEPOSITS OF THE LATE CENOZOIC PERIOD OF THE NORTHWESTERN PART OF THE CENTRAL YAKUT PLAIN AND ADJACENT TERRITORY OF THE EAST SIBERIAN PLATEAU (SHEET Q-51)

The so-called “watershed coarse gravels” of the Neogene were preserved within the development of heterochronous denudation peneplanation planes. Based on the comparison of paleontological data with the global eustatic Hague-Weil curve, a ladder of denudation levels is constructed. According to the latter, the age of alluvial are determined. Correlation of the deposits of erosion-accumulative terraces in the conditions of the Munsky neotectonic uplift with alluvium in the valley of the Lena is realised. For the latter, the Late Neo-Pleistocene-Holocene age is substantiated and separate geomorphological unit is proposed. The conclusion is made about the weak notion substantiation on the dammed origin of the Mavrinskaya Formation and its age range, the significant role of subaeral processes in its formation in the interval of the Samarovo-Muruktinskoye time is assumed.

Biodiversity in the Cueva del Viento Lava Tube System (Tenerife, Canary Islands)

Cueva del Viento and Cueva de Felipe Reventón are lava tubes located in Tenerife, Canary Islands, and are considered the volcanic caves with the greatest cave-dwelling diversity in the world. Geological aspects of the island relevant to the formation of these caves are discussed, and their most outstanding internal geomorphological structures are described. An analysis of the environmental parameters relevant to animal communities is made, and an updated list of the cave-adapted species and their way of life into the caves is provided. Some paleontological data and comments on the conservation status of these tubes are included.

Exploring the impact of unstable terminals on branch support values in paleontological data

Recent studies have acknowledged the many benefits of including fossils in phylogenetic inference (e.g., reducing long-branch attraction). However, unstable taxa are known to be problematic, as they can reduce either the resolution of the strict consensus or branch support. In this study, we evaluate whether unstable taxa that reduce consensus resolution affect support values, and the extent of such impact, under equal and extended implied weighting. Two sets of analyses were conducted across 30 morphological datasets to evaluate complementary aspects. The first focused on the analytical conditions incrementing the terminal instability, while the second assessed whether pruning wildcards improves support. Changes in support were compared with the “number of nodes collapsed by unstable terminals,” their “distance to the root,” the “proportion of missing data in a dataset,” and the “proportion of sampled characters.” Our results indicate that the proportion of missing entries distributed among closely related taxa (for a given character) might be as detrimental for stability as those distributed among characters (for a given terminal). Unstable terminals that (1) collapse few nodes or (2) are closely located to the root node have more influence on the estimated support values. Weighting characters according to their extra steps while assuming that missing entries contribute to their homoplasy reduced the instability of wildcards. Our results suggest that increasing character sampling and using extended implied weighting decreases the impact of wildcard terminals. This study provides insights for designing future research dealing with unstable terminals, a typical problem of paleontological data.

A Total-Evidence Dated Phylogeny of Echinoidea Combining Phylogenomic and Paleontological Data

Phylogenomic and paleontological data constitute complementary resources for unraveling the phylogenetic relationships and divergence times of lineages, yet few studies have attempted to fully integrate them. Several unique properties of echinoids (sea urchins) make them especially useful for such synthesizing approaches, including a remarkable fossil record that can be incorporated into explicit phylogenetic hypotheses. We revisit the phylogeny of crown group Echinoidea using a total-evidence dating approach that combines the largest phylogenomic data set for the clade, a large-scale morphological matrix with a dense fossil sampling, and a novel compendium of tip and node age constraints. To this end, we develop a novel method for subsampling phylogenomic data sets that selects loci with high phylogenetic signal, low systematic biases, and enhanced clock-like behavior. Our results demonstrate that combining different data sources increases topological accuracy and helps resolve conflicts between molecular and morphological data. Notably, we present a new hypothesis for the origin of sand dollars, and restructure the relationships between stem and crown echinoids in a way that implies a long stretch of undiscovered evolutionary history of the crown group in the late Paleozoic. Our efforts help bridge the gap between phylogenomics and phylogenetic paleontology, providing a model example of the benefits of combining the two. [Echinoidea; fossils; paleontology; phylogenomics; time calibration; total evidence.]

Paleomagnetic characteristics of upper cretaceous sediments of North–East Western Siberia

Presents the results of complex paleomagnetic and geological–stratigraphical study of Upper Cretaceous deposits of the three deep wells (Tagul’skaya 21, Tagul’skaya 25) (south–east of Western Siberia, Kolpashevo facial region), drilled on the nord–east of Western Siberia (Enisei–Khatangskii megadeflection). All studies were complex and carried out based on paleomagnetic, geological– stratigraphic and paleontological data.

Death is on Our Side: Paleontological Data Drastically Modify Phylogenetic Hypotheses

Fossils are the only remaining evidence of the majority of species that have ever existed, providing a direct window into events in evolutionary history that shaped the diversification of life on Earth. Phylogenies underpin our ability to make sense of evolution but are routinely inferred using only data available from living organisms. Although extinct taxa have been shown to add crucial information for inferring macroevolutionary patterns and processes (such as ancestral states, paleobiogeography and diversification dynamics), the role fossils play in reconstructing phylogeny is controversial. Since the early years of phylogenetic systematics, different studies have dismissed the impact of fossils due to their incompleteness, championed their ability to overturn phylogenetic hypotheses or concluded that their behavior is indistinguishable from that of extant taxa. Based on taxon addition experiments on empirical data matrices, we show that the inclusion of paleontological data has a remarkable effect in phylogenetic inference. Incorporating fossils often (yet not always) induces stronger topological changes than increasing sampling of extant taxa. Fossils also produce unique topological rearrangements, allowing the exploration of regions of treespace that are never visited by analyses of only extant taxa. Previous studies have proposed a suite of explanations for the topological behavior of fossils, such as their retention of unique morphologies or their ability to break long branches. We develop predictive models that demonstrate that the possession of distinctive character state combinations is the primary predictor of the degree of induced topological change, and that the relative impact of taxa (fossil and extant) can be predicted to some extent before any phylogenetic analysis. Our results bolster the consensus of recent empirical studies by showing the unique role of paleontological data in phylogenetic inference, and provide the first quantitative assessment of its determinants, with broad consequences for the design of taxon sampling in both morphological and total-evidence analyses. [phylogeny, morphology, fossils, parsimony, Bayesian inference.]

New bat locality records from Cuba with emphasis on the province of Matanzas

Here we provide a compilation of bat distribution records based on neontological and paleontological data, updating the known distribution in Matanzas province, the Isle of Pines, and Central Cuba. From 97 collecting localities in the Province of Matanzas, we report 27 taxa out of the 34 known from the Cuban archipelago; 21 of them are extant while the other six are extinct. Antrozous koopmani and Natalus primus are considered locally extinct in Matanzas, as in most of the archipelago today, but had a wider distribution in the past that lasted until very late in the Holocene. The extinct endemics, Artibeus anthonyi, and Phyllops vetus, are reported for the first time in the province, and the distribution records of Phyllops falcatus, Lasiurus pfeifferi, Lasiurus insularis, Chilonatalus macer, and Eumops ferox are updated and expanded. These records make Matanzas the second richest province in bat diversity of the Cuban archipelago and an area of considerable conservation potential.