Archives

  • Vol. 62 No. 6 (2025)

     

    HIGHLIGHTS

    - GONDWANAN PERSPECTIVES: 40th ANNIVERSARY OF ABELISAURIDAE (part 1)

    New records and species from Gondwana and Europe improve our knowledge of Abelisauridae on its 40th anniversary.

    - PALINOLOGY FROM THE LOWER CRETACEOUS OF PATAGONIA

    First palynological study of the Río Tarde Formation reveals a low-diversity assemblage dominated by fern spores and gymnosperm pollen grains.

    - A probable uropeltid snake from Northwestern Argentina

    An intriguing fragmentary skull of an Eocene snake from Argentina is described and discussed.

  • Vol. 62 No. 5 (2025)

     

    HIGHLIGHTS

    - NEW MIOCENE MOLLUSC SPECIES

    The dreissenid bivalve Mytilopsis from the Entre Ríos Province represents the southernmost record known for the genus in the world.

    - CRETACEOUS FOSSIL WOOD

    Twelve conifer woods from the Upper Cretaceous of Chubut Province, Argentina, are described and assigned to two fossil species.

    - NEW TRIASSIC REPTILE SPECIES

    Telkaralura coniceti is a new large gracilisuchid pseudosuchian from the Chañares Formation, La Rioja Province.

  • Vol. 62 No. 4 (2025)

     

    HIGHLIGHTS

    - SOUTHERNMOST DERMOCHELYID TURTLE FROM THE MIOCENE

    The description of the new species Helianthochelys redondita, which is the southernmost and last occurrence of a marine leatherback turtle in the Southern Hemisphere.

    - THEROPOD AND SAUROPOD DINOSAURS FROM THE CAMPANIAN-MAASTRICHTIAN BAGUA BASIN OF PERÚ, INCLUDING THE FIRST REPORT OF A PROBABLE SPINOSAURIDAE IN WESTERN SOUTH AMERICA

    A description of new Cretaceous dinosaur fossils that increases their scarce record in Perú, including the youngest record of Spinosauridae.

    - THE INFRAORBITAL FORAMEN IN SPARASSODONTA (MAMMALIA, METATHERIA), EXTINCT NATIVE PREDATORS OF SOUTH AMERICA

    This study investigates the infraorbital foramen size and its implications for the paleoecology of sparassodonts, focusing on Thylacosmilus.

  • Vol. 62 No. 3 (2025)

     

    HIGHLIGHTS

    - THE FIRST FOSSIL RECORD OF STEPHANOLLONA (BRYOZOA: CHEILOSTOMATIDA) IN THE MIOCENE OF PATAGONIA (ARGENTINA)

    A new species Stephanollona ricoae (Chenque Formation: lower-middle Miocene), representing the first fossil record of the genus in South America.

    - PAST TEMPERATURE RECONSTRUCTIONS IN SOUTHERN SOUTH AMERICA: ADDRESSING METHODOLOGICAL CHALLENGES

    A paleoclimate synthesis for the Last Gacial Maximum and Mid-Holocene based on proxy reconstructions for southern South America.

    - LEYESAURUS MARAYENSIS (DINOSAURIA, SAUROPODOMORPHA) FROM NORTHWESTERN ARGENTINA: AN UPDATE

    A brief review of the Argentinean early sauropodomorph Leyesaurus, including a reinterpretation and a revision of the holotype material.

  • Gondwanan Perspectives: Paleontological studies in Antarctica and its biogeographic connection with South America (part 3)
    Vol. 62 No. 2 (2025)

     

    HIGHLIGHTS

    GONDWANAN PERSPECTIVES: PALEONTOLOGICAL STUDIES IN ANTARCTICA AND ITS BIOGEOGRAPHIC CONNECTION WITH SOUTH AMERICA (PART 3)

    - LATE EOCENE DINOFLAGELLATES FROM MARAMBIO ISLAND

    Based on cyst events, the Submeseta Formation's age in betwween 36.7 and 34.1 My (Priabonian, late Eocene), confirming that the unit does not extend into the Oligocene.

    - DIVERSE UPPER PALEOCENE FLORA FROM MARAMBIO ISLAND

    A new unbiased collection is dominated by ferns (Cladophlebis and Sphenopteris), followed by Atherospermataceae, Lauraceae, Moraceae, and Winteraceae.

    - AN EARLY CENOZOIC BIOGEOGRAPHICAL BARRIER FOR TERRESTRIAL MAMMALS

    The Weddell Line is proposed as a new biogeographical barrier that acted as a sweepstakes route between East and West Antarctica during early Paleogene times. 

  • Gondwanan Perspectives: Paleontological studies in Antarctica and its biogeographic connection with South America (part 2)
    Vol. 62 No. 1 (2025)

     

    HIGHLIGHTS

    GONDWANAN PERSPECTIVES: PALEONTOLOGICAL STUDIES IN ANTARCTICA AND ITS BIOGEOGRAPHIC CONNECTION WITH SOUTH AMERICA (PART 2)

    - LATE JURASSIC ACTINOPTERYGIAN FISHES FROM LONGING GAP

    Scales are described from the Ameghino Formation, representing the first record of Amiiformes in Antarctica and the southernmost records for both Amiiformes and Ginglymodi worldwide.

    - NEW UPPER CRETACEOUS PLESIOSAUR FROM VEGA ISLAND

    Elasmosaurid remains, including parts of the cranium, are described from Snow Hill Island Formation.

    - BODY SIZE INCREASE IN PALEOGENE POLYDOLOPIDAE

    The congruent evolutionary history between South America and Antarctic polydolopid species reinforces the idea of a single biogeographic unit comoposed of Patagonia and the Antactica Peninsula.

  • Vol. 61 No. 6 (2024)

     

    HIGHLIGHTS

    - DEVONIAN PHACOPIDS FROM ARGENTINA

    The revised record of the Early Devonian phacopid trilobite Reedops in Argentina is relevant to recognize the Lochkovian-Pragian transition.

    - DECODING THE EVOLUTION OF MAMMALIAN PREDATORS

    The pattern of evolution of the South American extinct mammalian predator clade, the Sparassodonta, is studied with new data from the fossil record and phylogenies.

  • Gondwanan Perspectives: Paleontological studies in Antarctica and its biogeographic connection with South America (part 1)
    Vol. 61 No. 5 (2024)

     

    HIGHLIGHTS

    GONDWANAN PERSPECTIVES: PALEONTOLOGICAL STUDIES IN ANTARCTICA AND ITS BIOGEOGRAPHIC CONNECTION WITH SOUTH AMERICA (PART 1)

    - ANTARCTIC AMMONOID PALEOPATHOLOGIES

    Ammonoid shells from the Maastrichtian López de Bertodano Formation preserve injuries and abnormalities.

    - NEW EOCENE ANTARCTIC ASTEROIDS

    Eocene basal and derived genera of Pentagonasterinae offer evidence on the evolution and paleoecology of the clade.

    - ANTARCTIC PLESIOSAUR BONE HISTOLOGY

    Microanatomy and bone histology of vertebrae from different sections of the column of a Maastrichtian elasmosaurid from Antactica.

     

  • Vol. 61 No. 4 (2024)

    HIGHLIGHTS 

    - PAMPEAN LAKE DYNAMICS IN THE HOLOCENE

    The environmental history of Las Mostazas Lake, SE of Buenos Aires, is reconstructed by studying multiple biological indicators: diatoms, mollusks, pollen, and NPPs.

  • Vol. 61 No. 3 (2024)

    HIGHLIGHTS: -PELOMEDUSOID TURTLES FROM THE BAJO DE LA CARPA FORMATION (SANTONIAN, UPPER CRETACEOUS), RÍO NEGRO PROVINCE, PATAGONIA, ARGENTINA

    -EARLY MIOCENE SLOTH (FOLIVORA) REMAINS FROM PAMPA CASTILLO, SOUTHERN CHILE, INCLUDING A NATURAL CRANIAL ENDOCAST

  • Vol. 61 No. 2 (2024)

    HIGHLIGHTS -EOCENE CELTIS LEAVES ARE RELATED TO DOBINEA, A MAINLAND ASIAN GENUS OF ANACARDIACEAE

    -TURRITELLINE-DOMINATED CONCENTRATIONS SUGGEST A HABITAT OF NUTRIENT-RICH MARINE WATERS

    -THE FIRST CHITINOZOAN ASSEMBLAGES FROM THE SILURIAN-DEVONIAN OF SALTA SUPPORT GONDWANAN AFFINITIES

     

     

  • Vol. 61 No. 1 (2024)

    HIGHLIGHTS -OSTEOLOGY AND DEVELOPMENT OF THE CRETACEOUS ANURAN AVITABATRACHUS
    -A NEW TURTLE FROM THE UPPER CRETACEOUS OF PATAGONIA
    -SYSTEMATICS OF MIOCENE SLOTH EUCHOLOEOPS

  • Vol. 60 No. 6 (2023)

    HIGHLIGHTS -ORDOVICIAN–SILURIAN CRYPTOSPORES OF COLOMBIA
    -JURASSIC CASSIDULOIDS FROM ARGENTINA
    -PRE- AND POSTSANTACRUCIAN INTERATHERIIDAE

  • Vol. 60 No. 5 (2023)

    HIGHLIGHTS -SOUTH AMERICAN PERMIAN AND TRIASSIC INSECTS
    -QUATERNARY CLAMS AS TAPHONOMIC TARGETS
    -BIOCHRONOLOGY OF NEOGENE PAMPEAN MAMMALIAN FAUNA

  • Gondwanan Perspectives: Mesozoic and Cenozoic Micropaleontology of South America, progresses and applications
    Vol. 60 No. 4 (2023)

    HIGHLIGHTS -MAASTRICHTIAN MICROFOSSILS FROM COLOMBIA
    -EOCENE CORRELATION ADJACENT TO THE DRAKE PASSAGE
    -PRODUCTIVITY IN PATAGONIAN MARGIN DURING MIS3

  • Vol. 60 No. 3 (2023)

    HIGHLIGHTS -FIRST DISCINID BRACHIOPODS FROM THE CENOZOIC OF PATAGONIA
    -REVISION OF INTERATHERIID NOTOUNGULATES FROM THE MIOCENE OF PATAGONIA
    -THREE NEW TOXODONTIDAE NOTOUNGULATES FROM THE CENOZOIC OF WEST-CENTRAL ARGENTINA

  • Gondwanan Perspectives: Triassic ecosystems
    Vol. 60 No. 2 (2023)

    HIGHLIGHTS -TERATOLOGICAL TRIASSIC PALYNOMORPHS
    -NEW LATE TRIASSIC NANNOFOSSILS FROM MENDOZA
    -FISH SCALES FROM TRIASSIC LACUSTRINE DEPOSITS

  • Gondwanan Perspectives: Fossil wood anatomy
    Vol. 60 No. 1 (2023)

    HIGHLIGHTS -TRIASSIC CONIFER-LIKE WOODS FROM ARGENTINA
    -AFRICAN AFFINITIES OF CENOZOIC LEGUMES FROM SOUTH AMERICA
    -SOLANACEAE WOOD FROM THE PARANÁ FORMATION OF ARGENTINA

  • Vol. 59 No. 6 (2022)

    HIGHLIGHTS -NEW RECORD OF THE PERMIAN LUECKISPORITES/WEYLANDITES BIOZONE
    -PALEOPATHOLOGIES OF _MEGATHERIUM AMERICANUM_
    -NEW NEOGENE FOOTPRINTS FROM THE ATLANTIC COAST

  • Vol. 59 No. 5 (2022)

    HIGHLIGHTS -NEW NEOBATRACHIA FROM THE LATE CRETACEOUS OF BRAZIL
    -NEW NANOID TITANOSAUR FROM THE UPPER CRETACEOUS OF BRAZIL
    -NEW PHOCIDAE FROM THE LATE MIOCENE–PLIOCENE OF CHILE

  • Vol. 59 No. 4 (2022)

    HIGHLIGHTS -MISSISSIPPIAN PALYNOFLORA FROM AUSTRALIA -SCLEROBIOSIS, EPIBIOSIS AND MARINE HARD SUBSTRATES -QUATERNARY VERTEBRATE TAPHONOMY IN BRAZIL

  • Vol. 59 No. 3 (2022)

    HIGHLIGHTS -BRYOPHYTES FROM THE TRIASSIC OF SAN JUAN, ARGENTINA -REVISION OF FOSSIL COLEOPTERA FROM CHINA -TAXONOMY AND PHYLOGENY OF EARLY SOUTH AMERICAN CAIMANINES

  • Vol. 59 No. 2 (2022)

    HIGHLIGHTS -CRANIAL PATHWAYS IN NOTOUNGULATES -AMORPHOUS SILICA MICROFOSSILS FROM THE SOUTHERN PAMPAS -NEW BRYOZOANS FROM THE MIOCENE OF PATAGONIA

  • Vol. 59 No. 1 (2022)

    HIGHLIGHTS -REVISITING <RINCOSAURUS CAUDAMIRUS> FROM THE UPPER CRETACEOUS OF PATAGONIA -MACROEVOLUTIONARY HISTORY OF BODY SIZE IN ARCHOSAUROMORPHS -STEM PLATYRRHINE FROM THE MIOCENE OF PATAGONIA

  • Vol. 58 No. 6 (2021)

    HIGHLIGHTS -UBIQUITOUS MICROBIALITES IN THE PERMIAN OF BRAZIL -A BASAL AETOSAUR FROM THE UPPER TRIASSIC OF ARGENTINA -SPARASSODONTA FROM THE MIOCENE OF PATAGONIA

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