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Jean-Christophe Balouet (12 november 1956 – 30 march 2021) Geobios (IF 1.6) Pub Date : 2023-12-13 A, n, t, o, i, n, e, , L, o, u, c, h, a, r, t
Abstract not available
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Late Pleistocene small mammals (Chiroptera, Rodentia, Lagomorpha) from Agios Georgios Cave (Kilkis, Central Macedonia, Greece) Geobios (IF 1.6) Pub Date : 2023-11-10 Pavlos Piskoulis, Evangelia Tsoukala, Ioanna Tsiourlini
The Late Pleistocene small mammal fauna from Agios Georgios Cave (Kilkis, Central Macedonia, Greece) is examined, resulting in the identification of 14 species of Chiroptera, Rodentia and Lagomorpha. The palaeoenvironment of the area around the cave seems to have been a relatively arid, steppe-like plain with sparsely-wooded patches. There was also a permanent or temporary water body near the cave
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Shelly coprolites record durophagous predation in the Late Ordovician Bohdalec Formation (Katian; Prague Basin, Czech Republic) Geobios (IF 1.6) Pub Date : 2023-11-10 Russell D.C. Bicknell, Jana Bruthansová, Julien Kimmig
Trace fossils can illustrate important palaeobiological interactions within a fossil assemblage that body fossils do not record. A group of trace fossils that showcase feeding ecology, and evidence of predation, are coprolites. Shelly coprolites are useful for documenting records of durophagous predators or scavengers within a substrate. To expand the record of these traces from the lower Paleozoic
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New caenagnathid (Theropoda: Oviraptorosauria) dinosaur specimens from middle and upper Campanian strata of West Texas Geobios (IF 1.6) Pub Date : 2023-11-10 Steven L. Wick, Thomas M. Lehman, John D. Fortner
New caenagnathid dinosaur specimens from the upper Aguja Formation of West Texas comprise the most complete examples yet described from southern North America. Two individuals are represented. Osteohistology indicates that both were mature at their times of death. Although they share no overlapping elements, the two individuals are separated by overall body size, paleohabitat, and stratigraphic position
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Growth patterns and affinities of Huizenodus oligaspinosus (?Cnidaria) from the lower Cambrian of South China Geobios (IF 1.6) Pub Date : 2023-11-10 Jiachen Qin, Yunhuan Liu, Tiequan Shao, Xingyu Zhou, Mingjin Liu, Yanan Zhang, Qi Wang
Helmet-like small shelly fossils from the Cambrian Fortunian Stage of South China are a class of morphological taxa with uncertain affinities. Here, we redefine the genera Amoebinella and Huizenodus and consider Huizenodus oligaspinosus to be a senior synonym of Amoebinella echinata. In addition, we report two compound fossils of H. oligaspinosus for the first time from the Fortunian Zhangjiagou Lagerstätte
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Triplinerved cinnamon from the Siwalik (middle Miocene) of eastern Himalaya: Systematics, epifoliar fossil fungi, palaeoecology and biogeography Geobios (IF 1.6) Pub Date : 2023-11-10 Sumana Mahato, Taposhi Hazra, Sandip More, Mahasin Ali Khan
Cinnamomum Schaeffer (avocado, family Lauraceae), commonly known as cinnamon tree, is a highly diverse, economically important evergreen element of tropical and subtropical regions of the world. In the present work, several compressed leaf remains similar to modern leaves of Cinnamomum are recovered from the lower part of the Siwalik strata (middle Miocene) of Darjeeling foothills, eastern Himalaya
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Environmental and vegetation dynamics through the Oligocene to Early Miocene of North Africa (Egypt) Geobios (IF 1.6) Pub Date : 2023-11-10 Mohamed I.A. Ibrahim, Eman Bassiouni, Rafik El-Ghareeb, Azza Shehata, Haytham El Atfy
This study documents palynomorph assemblages from the Oligocene through the Early Miocene, across the significant Warm-house to Cool-house transition, using a subsurface section from the AG-5 well, north Western Desert of Egypt. Although the Paleogene and Neogene strata occupied a large area of the land, little about vegetation and ecosystem processes that shaped the climate and biodiversity during
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Taxonomy, biostratigraphy and paleobiogeography of Strenuaeva (Trilobita) from the Marianian (Cambrian Series 2) of Iberia Geobios (IF 1.6) Pub Date : 2023-11-10 Luis Collantes, Sofia Pereira, Eduardo Mayoral, Eladio Liñán, Alexandre Sepúlveda, Rodolfo Gozalo
Problems surrounding the identification and systematics of taxa belonging to the trilobite family Ellipsocephalidae have been discussed for several decades. The ellipsocephalid genus Strenuaeva is revised herein on the basis of material from Spain, including the type material of the identified species together with newly collected specimens from the Ossa-Morena Zone and the Iberian Chains. Two species
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Filling knowledge gaps in the Ordovician radiations Geobios (IF 1.6) Pub Date : 2023-11-03 Bertrand Lefebvre, Thomas Servais
Abstract not available
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Skeletal elements controlled soft-tissue preservation in echinoderms from the Early Ordovician Fezouata Biota Geobios (IF 1.6) Pub Date : 2023-10-31 Farid Saleh, Bertrand Lefebvre, Christophe Dupichaud, Emmanuel L.O. Martin, Martina Nohejlová, Léa Spaccesi
Exceptional fossils preserve non-biomineralized tissues in the geological record and provide crucial information on the evolution of life on Earth. Exceptionally preserved fossils are rarely discovered complete, challenging their morphological description and their palaeontological interpretation. Although decay experiments reconstructing degradation sequences in modern animals are necessary to better
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New lizard material from two Early Miocene localities in France: Montaigu-le-Blin (MN 2) and Crémat (MN 3) Geobios (IF 1.6) Pub Date : 2023-09-18 Andrej Čerňanský
Squamate faunas from the MN 1–3 intervals (earliest Miocene) are scarcely documented from the European continent. I here describe squamate faunas from two French localities – Montaigu-le-Blin (MN 2) and Crémat (MN 3), the latter being the youngest locality of the Phosphorites du Quercy. The palaeobiodiversity of squamates from these sites is low relative to the faunas described from coeval localities
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An oversized, late-surviving reticulosan sponge from the Carboniferous of Ireland Geobios (IF 1.6) Pub Date : 2023-08-11 Joseph P. Botting, Lucy A. Muir, Eamon Doyle
Cyathophycus is one of the most widespread reticulosan sponges in Ordovician to Devonian rocks, but was mostly limited to the Iapetus region during the Ordovician and Silurian periods. Having an unfused skeleton, these sponges require an element of exceptional preservation (abrupt burial as a minimum) to enter the fossil record. Most species are a few centimetres in size, and found in muddy offshore
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First fossil evidence of samaras of Ailanthus Desf. (Simaroubaceae) from India and its implications Geobios (IF 1.6) Pub Date : 2023-08-11 Taposhi Hazra, Mahasin Ali Khan
Even though it is now widespread in Asia and was widely distributed in the Northern Hemisphere during the Cenozoic, fruits of the genus Ailanthus Desf. (Simaroubaceae) have not previously been documented from the Cenozoic of India. Here, we report the first Indian occurrence of fossil winged fruits corresponding to the modern genus Ailanthus having samaroid mericarps with a centrally placed seed from
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Middle Ordovician brachiopods from Tagoat, Co. Wexford, SE Ireland: Dapingian diversity drivers Geobios (IF 1.6) Pub Date : 2023-08-07 David A.T. Harper, Denis E.B. Bates
The Dapingian (Arenig) siltstones and sandstones of the Tagoat Group, County Wexford, SE Ireland, contain a well-preserved and diverse brachiopod fauna including a new genus of alimbellid, Palaeotagoatia (type species: Orthis Bailyana Davidson) together with the plectorthid Ffynnonia costata (Bates) hibernica nov. subsp. Of the 13 forms documented, at least six are conspecific with brachiopods from
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Palynological investigation of an Upper Triassic sequence in Nanjing area, eastern China, with paleoecological implications Geobios (IF 1.6) Pub Date : 2023-08-07 Liqin Li, Yuanyuan Xu, Yongdong Wang, Wolfram M. Kürschner
The end-Triassic is characterized by a significant biotic crisis in both marine and terrestrial realms. However, terrestrial records in eastern Tethys are relatively limited, especially in eastern China. The Fanjiatang Formation represents the Upper Triassic sequence in southern Jiangsu and Anhui provinces of eastern China, yielding a rich plant and bivalve fossil record. The present study provides
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Ordovician chitinozoans and review on basin stratigraphy, biostratigraphy and paleobiogeography of northern Argentina along the Proto-Andean margin Geobios (IF 1.6) Pub Date : 2023-08-06 G. Susana de la Puente, Ricardo A. Astini
Ordovician strata exposed across the Cordillera Oriental and the Sierras Subandinas in northwestern Argentina were part of a large retroarc foreland basin developed along the Proto-Andean margin within the Central Andes in South America. A revised chitinozoan biostratigraphy along and across-strike for the Tremadocian, Floian, Dapingian, Katian and Hirnantian stages, calibrated with other fossil groups
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Babies from the Fezouata Biota: Early developmental trilobite stages and their adaptation to high latitudes Geobios (IF 1.6) Pub Date : 2023-08-06 Lukáš Laibl, Harriet B. Drage, Francesc Pérez-Peris, Sebastian Schöder, Farid Saleh, Allison C. Daley
The Lower Ordovician Fezouata Shale is renowned for its exceptionally-preserved euarthropod fossils including numerous species of trilobites, some of which show remains of appendages and traces of the digestive system. Herein, we describe the early developmental stages of at least nine trilobite species from the Tremadocian strata of the Fezouata Shale, namely Platypeltoides magrebiensis, Nileus deynouxi
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Biostratigraphic and structural research in the Guedelhinha–Lançadoiras–Algaré sector in the context of the geology of the Neves–Corvo mine region, Iberian Pyrite Belt Geobios (IF 1.6) Pub Date : 2023-08-05 Zélia Pereira, João Xavier Matos, Márcia Mendes, Rita Solá, Luís Albardeiro, Igor Morais, Vitor Araújo, Nelson Pacheco, José Tomás Oliveira
Based on drill hole sampling and sedimentary rock dating by palynology, the present research focuses on the palynostratigraphic events established in the key geological section of Guedelhinha–Lançadoiras–Algaré located in the Portuguese Neves–Corvo mine region, Iberian Pyrite Belt. The age data allow detailing the lithostratigraphic sequence and further understanding the complex structural setting
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Macaronichnus ‘co-occurrence’ in offshore transition settings: Discussing the role of tidal versus fluid muds influence Geobios (IF 1.6) Pub Date : 2023-08-05 Francisco J. Rodríguez-Tovar, Fernando García-García
Macaronichnus is a key trace fossil in palaeoceanographic, palaeoclimatic, and petroleum exploration research. Small ichnosubspecies such as Macaronichnus segregatis segregatis, M. s. lineiformins, M. s. maeandriformis and M. s. spiriformis, typically occur in wave-dominated foreshore sands where large M. s. degiberti was never found. The latter shows a wide environmental distribution, occurring in
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Tremadocian (Ordovician) trilobites from the Brabant Massif (Belgium): Palaeogeographical and palaeoecological implications Geobios (IF 1.6) Pub Date : 2023-08-05 Lukáš Laibl, Thomas Servais, Bernard Mottequin
A poorly diverse trilobite assemblage is described from the Tremadocian strata (Tangissart Member of the Mousty Formation; Chevlipont Formation) of the Brabant Massif. These specimens represent so far the oldest trilobite record from Belgium. The recorded taxa, identified as Platypeltoides cf. croftii, Macropyge? sp., and Asaphidae indet., resemble contemporaneous trilobites from other parts of Avalonia
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Middle and Upper Ordovician linguliformean and craniiformean brachiopods from the Brabant Massif, Belgium: Infaunal giants, encrusting forms and durophagy Geobios (IF 1.6) Pub Date : 2023-07-20 Yves Candela, Bernard Mottequin
Linguliformean and craniiformean brachiopods from the Middle and Upper Ordovician of the Brabant Massif (Belgium) are described for the first time and their palaeoecological and palaeobiogeographical implications are discussed. The restricted and generally poorly preserved material was collected from the Abbaye de Villers (Dapingian–Darriwilian) Formation and from the Katian Huet and Fauquez formations
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Osteological and historical data on extinct island night herons (Aves: Ardeidae), with special reference to Ascension Island, the Mascarenes and Bonin Islands Geobios (IF 1.6) Pub Date : 2023-07-17
Night herons of the genus Nycticorax and Nyctanassa are adept island colonisers, occurring on a number of oceanic islands and island archipelagos. Continental species and those inhabiting large islands are generally not considered threatened, whereas night herons restricted to small, oceanic islands are particularly vulnerable to human interference. As a result, six out of nine described species and
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A new pustulose bivalve from the Late Ordovician of the Prague Basin (Czech Republic) and remarks on the diversification of pteriomorphids Geobios (IF 1.6) Pub Date : 2023-07-18 Marika Polechová, Ondřej Zicha, Štěpán Rak
The new genus Alena Polechová, Zicha and Rak, with its type species Alena pustulosa nov. gen., nov. sp., is described from the Sandbian Letná Formation of the Prague Basin (Czech Republic) as a new Late Ordovician bivalve with pustules. Alena pustulosa nov. gen., nov. sp. appears to be an endobyssate bivalve based on its functional morphology. It is placed within Cyrtodontida (Pteriomorphia) and included
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Holocene vertebrate assemblages provide the first evidence for the presence of the barn owl (Tytonidae, Tyto alba) on Socotra Island (Yemen) Geobios (IF 1.6) Pub Date : 2023-07-17
We describe the vertebrate remains found in a Holocene deposit inside the Taiti Cave, Socotra Island (Yemen). The fossils were found in a sand dune occupying almost entirely the main cavity of the Cave, with some bones collected on the surface and the majority of them found under its surface, in particular below a tiny level of hardened sand, the latter probably related to a guano deposit. They were
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Jaw anatomy of Vegavis iaai (Clarke et al., 2005) from the Late Cretaceous Antarctica, and its phylogenetic implications Geobios (IF 1.6) Pub Date : 2023-07-17
Vegavis iaai is without any doubt the most complete and well-known Mesozoic bird from Antarctica. In spite of being known by several specimens, its highly specialized postcranial anatomy has obscured the recognition of its phylogenetic affinities. Skull material from Vegavis is scarce, and the lower jaw is known by a relatively well-preserved articular region of a partially articulated specimen (MACN-PV 19
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Not too fast: Maximum running speed estimation of the Miocene rheid Opisthodactylus kirchneri (Aves, Rheidae) Geobios (IF 1.6) Pub Date : 2023-07-17
This contribution studies some paleobiological aspects of Opisthodactylus kirchneri, a fossil rheid from the Late Miocene of northwestern Argentina. We estimate the body mass of this species using an allometric equation based on long-legged birds. Besides, we estimate the maximum running speed by applying a previously published biomechanical model to study other living and fossil running birds. We
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The Halcyornithidae from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK): A species complex of Paleogene arboreal birds Geobios (IF 1.6) Pub Date : 2023-07-17
We report fossils of the Halcyornithidae from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). The material includes remains of nine individuals of these small zygodactyl birds, which belong to at least seven different species, two of which are newly described. This documents a high species richness of halcyornithids in the London Clay, and these birds apparently underwent a significant
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Coral assemblages and environments from Bajocian reefs in the Western Carpathians Geobios (IF 1.6) Pub Date : 2023-07-17 Bernard Lathuilière, Ján Schlögl, Adam Tomašových, Daria K. Ivanova
The systematics of the coral assemblages of the Vršatec Limestone from the Pieniny Klippen Belt (Western Carpathians) that inhabited the NW Tethyan margin during the Bajocian is revisited here based on a new and extensive sampling of coral specimens collected at four outcrops. The assemblage consists of 12 genera and 13 species, including the new species Proaplophyllia slovakensis and the first Bajocian
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Szaferomyces pliocenicus nov. gen., nov. sp. from the Upper Pliocene deposits of Mizerna (Poland), a fossil fungus showing close resemblance to modern powdery mildews Geobios (IF 1.6) Pub Date : 2023-07-16 Grzegorz Worobiec, Marcin Piątek, Elżbieta Worobiec
A fungal chasmothecium-like structure resembling those of the contemporary members of the Erysiphaceae was found during palynological investigations of Upper Pliocene deposits from Mizerna (borehole Mizerna-Nowa), southern Poland. This chasmothecium-like remain, preserved without any asci, ascospores and mycelium attached, is morphologically most similar to the chasmothecia of modern powdery mildews
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New genera and species of glaessneropsid crabs from the Lower and Middle Jurassic of France and Germany-Austria, and reconsolidation of Charassocarcinus Van Straelen, 1925 Geobios (IF 1.6) Pub Date : 2023-07-14 Barry W.M. van Bakel, Danièle Guinot
A new genus, Meroncarcinus, and two new species, M. boursicoti and Verrucarcinus marsae, are described from Callovian (Middle Jurassic) deposits of Calvados and Maine-et-Loire, France. New material of the type species of the genus Verrucarcinus, V. torosus, is examined, which improves our understanding of the peculiar morphology of this group of crabs. A new genus and species, Vilsercarcinus keuppi
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Cricetid, eomyid and murid fauna from the Middle Miocene site (MN6) of Devínska Nová Ves – Bonanza (Slovakia) Geobios (IF 1.6) Pub Date : 2023-07-14 S. Jovells-Vaqué, I. Bonilla-Salomón, O. Mažgút, S. Čermák, À.H. Luján, P. Joniak, M. Sabol
Rodents play an important role in all current and extinct ecosystems. In this study we present the fossil record of cricetids, eomyids and murids from Devínská Nová Ves–Bonanza (Vienna Basin, Slovakia). A detailed morphometric analysis revealed the presence of Eumyarion cf. latior, Democricetodon vindobonensis, Karydomys sp., Anomalomys sp., Neocometes brunonis, Keramidomys carpathicus, and Eomyops
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Carnivora from the Early Pleistocene locality of Karnezeika (Southern Greece) Geobios (IF 1.6) Pub Date : 2023-07-14 Panagiotis D. Sianis, Athanassios Athanassiou, Socrates Roussiakis, George Iliopoulos
Karnezeika is an Early Pleistocene locality in the Peloponnese, South Greece. More than 3000 specimens have been unearthed and studied, revealing the presence of a large mammal assemblage, which corresponds to the middle Villafranchian biochronological unit. The bovid fauna of the site has already been presented, as well as the scarce remains of a large cercopithecid, which characterizes Karnezeika
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New planktonic foraminiferal record across the Aptian–Albian transition in Interior Fars, Zagros Basin, SW Iran: Implication for latest Aptian paleogeography along the southern shallower Neo-Tethys Geobios (IF 1.6) Pub Date : 2023-05-26 Javad Sharifi, Mohammad Vahidinia, Atsushi Ando, Mohamad Hosein Mahmudy-Gharaie
The Aptian–Albian (A–A) transition encompassed a critical timing in the evolution of Fars Platform (Zagros Basin, SW Iran), such that a number of previous studies on its proximal part (called “Coastal Fars”) illustrated platform recovery after sustained demise due to latest Aptian maximum sea-level lowstand. So far, much less attention has been given to the distal part of the platform – “Interior Fars”
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Duabanga (Lythraceae) from the Oligocene of India and its climatic and phytogeographic significance Geobios (IF 1.6) Pub Date : 2023-05-22 Harshita Bhatia, Gaurav Srivastava, R.C. Mehrotra
Understanding the evolutionary history of biodiversity hotspots has important implications for their future survival. India hosts four biodiversity hotspots: the Western Ghats of South India, the Andaman and Nicobar Islands, the Eastern Himalaya, and the Indo-Myanmar region. Northeast India (NEI) is an important region that hosts 43% of the total plant species occurring in India, of which ∼39% are
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Late Miocene large-sized Bovidae (Mammalia) from Dimeh, SW Iran: Contribution to depositional diachrony and palaeobiogeography Geobios (IF 1.6) Pub Date : 2023-05-22 Zahra Orak, Dimitris S. Kostopoulos, Majid Mirzaie Ataabadi
We describe here cranial and dental material of large bovids (Bovidae, Mammalia) from the Upper Miocene fossil site of Dimeh, SW Iran. Six taxa have been recognized: Palaeoryx cf. pallasi, Skoufotragus laticeps, Plesiaddax? sp., Samokeros minotaurus, Tragoportax cf. amalthea and the new species Tragoportax perses. The (i) shortened, rectangularly shaped basioccipital with strong anterior tuberosities
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Dormice (Rodentia, Gliridae) from the Middle Miocene of Hambach 6C, Northwest Germany Geobios (IF 1.6) Pub Date : 2023-05-22 Zhaoyu Li, Thomas Mörs
Glirid dental material is described from the Middle Miocene channel fill of the Hambach open-cast lignite mine in northwestern Germany. The fauna Hambach 6C shows a high diversity with seven species in six genera: Glirudinus undosus, Muscardinus thaleri, Muscardinus sansaniensis, Miodyromys aegercii, Paraglirulus werenfelsi, Microdyromys koenigswaldi, and Paraglis astaracensis, which are characteristic
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Aptian–Albian shallow-marine carbonate successions of the Geyik Dağı and the Anamas Dağ areas (Central Taurides, Turkey): Benthic foraminiferal assemblages and “Palaeocornuloculina” taurica nov. sp. (Foraminifera) Geobios (IF 1.6) Pub Date : 2023-05-22 Cemile Solak, Kemal Taslı
The Lower Cretaceous carbonate successions of the Tauride Carbonate Platform(s) (TCP) are characterized by mostly restricted inner platform facies. The record of these stages is limited owing to frequent exposure of the platform to subaerial and supratidal settings during the Early Cretaceous. This study focuses on the Lower Cretaceous (Aptian–Albian) successions outcropping at two localities in the
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The Ordovician bioclaustration revolution Geobios (IF 1.6) Pub Date : 2023-05-05 Olev Vinn, Mark A. Wilson, Andrej Ernst, Ursula Toom
There was a sudden increase in the diversity of bioclaustrations in the Sandbian (Late Ordovician) that continued somewhat more slowly in the Katian. The Sandbian was also the time when bioclaustrations became common, at least in Baltica. The major increase in the diversity of bioclaustrations in the Late Ordovician was an outcome of the GOBE, and we term it the Ordovician Bioclaustration Revolution
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Lower Ordovician Trilobites from SE Sardinia (Italy): A new record of the “Taihungshania bioprovince” Geobios (IF 1.6) Pub Date : 2023-05-04 Gian Luigi Pillola, Muriel Vidal
A systematic description of the so far unique trilobite fauna and the associated biota from the Arenarie di San Vito Formation, in the outcrops close to the abandoned Tacconis mine (allochthonous nappe zone, Sarrabus, SE Sardinia, Italy), proves the occurrence of Taihungshania shui landayranensis, Ampyx priscus, Asaphellus sp., Merlinia sp., Niobe fourneti?, Geragnostus sp. and Symphysurus sp., accompanied
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Latest Ordovician jawed polychaetes, chitinozoans and depositional environments of the Levín section, Prague Basin, Czech Republic Geobios (IF 1.6) Pub Date : 2023-05-03 Petra Tonarová, Stanislava Vodrážková, Olle Hints, Jaak Nõlvak, Michal Kubajko, Pavel Čáp
Jawed polychaetes evolved and diversified extensively during the Ordovician. However, Ordovician polychaete jaws (scolecodonts) have remained poorly documented for many regions. This applies for the Prague Basin of peri-Gondwana, from where the previous study on Late Ordovician scolecodonts was published more than 70 years ago, with just two species preliminarily identified. The aim of the present
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Ferruginous biolaminations within the pre-Hirnantian (Late Ordovician) of the Carnic Alps, Austria Geobios (IF 1.6) Pub Date : 2023-04-29 Annalisa Ferretti, Frédéric Foucher, Frances Westall, Luca Medici, Barbara Cavalazzi
Well preserved laminated structures occur within the Upper Ordovician of the Cellon section in the Carnic Alps (Austria), a world-famous reference section for Silurian conodont biostratigraphy. Microfacies from the Upper Ordovician Uqua Formation were characterised by using optical and scanning electron microscopy (SEM), an environmental scanning electron microscopy coupled with microanalyses (SEM/ESEM-EDX)
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Population dynamics of shoreface to upper offshore occupation of the lower Ordovician brachiopod Tarfaya purmamarcaensis (Benedetto) Geobios (IF 1.6) Pub Date : 2023-04-28 Diego F. Muñoz, Arnaud Bignon, Juan Luis Benedetto
Occupation of shallow environments by rhynchonelliform brachiopods is rare during the early late Tremadocian (Tr2). However, in the NW Argentina basin the plectorthoidean Tarfaya purmamarcaensis occupied high-energy environments during this time interval. This species forms up to 15 cm thick monospecific concentrations in shoreface and offshore transition settings, and polytypic pavements in relatively
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Yuexiconcha nov. gen. – A resilifer-bearing palaeotaxodont (Bivalvia, Protobranchia) from the Ordovician of Guangdong, South China Geobios (IF 1.6) Pub Date : 2023-04-28 Zhi-jun Niu, Ren-jie Zhang, Paul A. Johnston, Chu-an Li, Zhi-hong Wang, Kun Hu, Fang Song, Yao-yan He, Jin-lan He, Xiao-ming Lin, Wen-qiang Yang
A unique, new palaeotaxodont (Protobranchia) genus and species, Yuexiconcha duplicata Zhang, Niu and Johnston, is proposed and described. It is characterized by: a medium-sized, transversely elongated, sub-elliptical shell; heterotaxodont dentition; and posterior tooth row consisting of crowded gradidentate dentition, partially and dorsally overlapped by an additional tooth row that emanates from the
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New machaeridian data from the Upper Ordovician of Scotland: Palaeoecological and global palaeobiogeographical implications Geobios (IF 1.6) Pub Date : 2023-04-28 Yves Candela, Consuelo Sendino
New machaeridian material housed in the National Museum of Scotland alongside the type material held in the Natural History Museum London and the Sedgwick Museum of Earth Sciences, Cambridge, is documented here from the Ordovician of Girvan. The specimens are included in four taxa, three of these in open nomenclature. Syntypes and figured specimens of Plumulites scoticus by Nicholson and Etheridge
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The makers of Rhamphichnus ispp. reinterpreted as lepidosaurian and crocodilian, not pterosaurian Geobios (IF 1.6) Pub Date : 2023-03-29 Anton F.-J. Wroblewski
Three ichnospecies of the Late Jurassic trace fossil genus Rhamphichnus were first described and interpreted as the walking tracks of non-pterodactyloid pterosaurs like Rhamphorhynchus. This despite not resembling any previously identified pterosaur tracks and having a morphology unmatched by pterosaur skeletal elements. To fit the pterosaurian model, elongated imprints of R. pereiraensis and R. lafaurii
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Oldest record of the fossil syncarid (Crustacea) Palaeocaris from the Carboniferous Manning Canyon Formation, Utah, USA Geobios (IF 1.6) Pub Date : 2023-03-29 Allan J Lerner, Spencer G. Lucas
New records documented here demonstrate that Palaeocaris Meek and Worthen, 1865 was the most cosmopolitan and longest ranging (earliest Bashkirian to Gzhelian) fossil syncarid genus. It contains three species that are primarily known from occurrences in Euramerican Carboniferous Lagerstätten. Two of these species, P. typus Meek and Worthen, 1865 and P. secretanae Schram, 1984, have previously been
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Sus strozzii (Suidae, Mammalia) from the historical locality of Quercia (Early Pleistocene, Italy) Geobios (IF 1.6) Pub Date : 2023-03-29 Alessio Iannucci
Some remains of suids were recovered during the second half of the 1800s from Quercia (Tuscany, Italy), at a close distance to, but from a lower stratigraphic position than the better-known mammal fauna of Olivola. Although they were collected a long time ago, Quercia suids are described for the first time in this work. This sample represents one of the earliest occurrences (middle Villafranchian)
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The Mio-Pliocene transition in the Dacian Basin (Eastern Paratethys): Paleomagnetism, mollusks, microfauna and sedimentary facies of the Pontian regional stage Geobios (IF 1.6) Pub Date : 2023-03-28 Anton Matoshko, Arjan de Leeuw, Marius Stoica, Oleg Mandic, Iuliana Vasiliev, Alina Floroiu, Wout Krijgsman
Well-documented, high-resolution sedimentary sections are critical to our understanding of the often eventful evolution of semi-isolated basins that form during the final stages of continent–continent convergence, as exemplified by the Mediterranean-Paratethys system. Due to its nearly land-locked position in the Late Miocene, the Mediterranean experienced the renowned Messinian Salinity Crisis. At
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New evidence for Early Miocene palaeoenvironmental changes in the North Croatian Basin: Insights implicated by microfossil assemblages Geobios (IF 1.6) Pub Date : 2023-03-28 Valentina Hajek-Tadesse, Lara Wacha, Marija Horvat, Ines Galović, Koraljka Bakrač, Anita Grizelj, Oleg Mandic, Bettina Reichenbacher
An integrated stratigraphic study has been performed of the Lower Miocene deposits of the Poljanska and Mala sections (North Croatian Basin), coupled with 40Ar/39Ar dating, geochemical and mineralogical study of tuffitic and silty sand beds. The sedimentary record evidences deposition influenced by volcaniclastic input. The presence of marine, brackish and non–marine microfossils indicates complex
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New avian remains from the early Eocene of La Borie, southern France Geobios (IF 1.6) Pub Date : 2023-02-27 Cécile Mourer-Chauviré, Estelle Bourdon, Sylvain Duffaud, Guy Le Roux, Yves Laurent
The giant flightless bird Gastornis laurenti Mourer-Chauviré and Bourdon, 2020, has been described from a mandible, maxilla and quadrate discovered in the early Eocene locality of La Borie (middle Ypresian, reference level MP 8-9). This locality has yielded abundant fossil vertebrates. We describe here new postcranial remains of G. laurenti, a coracoideum assigned to Tegulavis corbalani nov. gen.,
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A new rodent chronology for the late Neogene of Spain Geobios (IF 1.6) Pub Date : 2023-01-23 Jan A. van Dam, Pierre Mein, Miguel Garcés, Ronald T. van Balen, Marc Furió, Luis Alcalá
The number of late Neogene Spanish micromammal-containing continental sections with a correlation to the Geomagnetic Time Scale is steadily growing. Nonetheless, well-calibrated sections with dense micromammal records are still rare, biostratigraphic correlations between basins are not straightforward, and ages of uncalibrated sites are poorly constrained. Here, we aim at improving the chronology of
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Holocene vertebrate fauna in Fergana Valley, Kyrgyzstan, based on fossils from the Obishir-5 rock shelter Geobios (IF 1.6) Pub Date : 2023-01-23 Natalia V. Serdyuk, Elena V. Syromyatnikova, Nikita V. Zelenkov, Aida Abdykanova, Saltanat Alisher Kyzy, Svetlana V. Shnaider
Central Asia is a region that, owing to its geographical position, has always been at the intersection of cultures. In the Fergana Valley, located in the very heart of Central Asia, the Late Pleistocene–Early Holocene is characterized by the expansion and intensification of human settlements. This cultural event has previously been linked to global climate changes that took place during the Pleistocene–Holocene
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First magnetostratigraphic results in the Aïn Beni Mathar-Guefaït Basin, Northern High Plateaus (Morocco): The Pliocene-Pleistocene Dhar Iroumyane composite section Geobios (IF 1.6) Pub Date : 2023-01-23 Josep M. Parés, Hamid Haddoumi, Mathieu Duval, Hassan Aouraghe, Claudia Álvarez-Posada, Sila Pla-Pueyo, Alfonso Benito-Calvo, Antonio Rodríguez-Hidalgo, Jan Van der Made, Pedro Piñero, Jordi Agustí, Aïcha Oujaa, Rainer Grün, María Gema Chacón, Robert Sala-Ramos
The Aïn Beni Mathar-Guefaït Basin, in the High Plateau Region (Morocco), is dissected by the Za River, the main eastern tributary of the Moulouya, which incises more than 150 m into Plio-Pleistocene sediments. The main goal of the present study is to provide an initial geochronologic framework for such basin infill based on a combination of magnetostratigraphy and electron spin resonance (ESR). The