A partir de mañana, miércoles 1 de octubre, el horario del Museo de Dinosaurios de Salas de los Infantes (Burgos) pasará a ser el siguiente:
martes, 30 de septiembre de 2025
viernes, 26 de septiembre de 2025
Análisis del oído interno en tortugas botremídidas en las X Jornadas Internacionales de Salas de los Infantes
Bothremydidae was a successful lineage of turtles within the Crown-group Pleurodira. Their representatives were widely distributed on most continents of both northern and southern hemispheres, and they were recognized from the Albian (Early Cretaceous) to the Eocene at least. All extant species of Pleurodira live in freshwater environments. However, the bothremydids occupied a wide range of aquatic habitats, not being limited to continental environments. Thus, the representatives of Cearachelyini and most members of Bothremydini were identified as freshwater turtles, while the representatives of Taphrosphyini and Nigeremydini, and also some species of Bothremydini (as the Maastrichtian Zolhafah bella), were recognized as marine forms. The proposed lifestyle for most bothremydid taxa is generally based on the interpretation of the sedimentary environments in which they were found. However, some anatomical modifications were identified as marine adaptations convergent with those observed in extant cryptodiran sea turtles, as the high-domed skulls or the elongated limb bones. The scarce neuroanatomical information available for Bothremydidae has not allowed to quantify modifications of the cranial cavities related to a particular lifestyle. Nevertheless, modifications in the endosseous labyrinth in response to adaptations for life in marine environments have been observed for different groups of reptiles. Thus, some groups of sauropterygians highly adapted to pelagic marine environments, such as plesiosaurs and sea cryptodiran turtles, have labyrinths with relatively short and wide semicircular canals. In contrast, Triassic sauropterygians adapted to coastal areas and marine crocodiles have relatively more elongated and narrow canals.
In this work, the inner ear of different lineages of bothremydid turtles were analyzed with the aim of identifying differences in this element related to adaptations to life in diverse aquatic environments. As in previous works on neuroanatomy of turtles, the analysis of the endosseous labyrinths of the bothremydids studied here was carried out using three-dimensional reconstructions generated from high-resolution CT-scan images. These virtual models have also been compared with those of other forms of turtles (both extant and extinct pleurodires and cryptodires) to identify modifications due to adaptation to different habitats. Relative measurements of the height and length of the semicircular canals have been used to identify these differences.
Although neuroanatomical studies are still relatively scarce for Bothremydidae, they provide valuable information on the modifications in the inner ears of this lineage. Although, in general terms, some previous studies have not revealed a direct relationship between the morphology of the inner ear and the lifestyle of the turtles, the endosseous labyrinths within Bothremydidae exhibit morphological differences across the lineages within this group. Bothremydid taxa identified as freshwater forms (i.e., Cearachelyini and most of Bothremydini) showed relatively elongated and narrow semicircular canals with a ratio between the length and the height above 2.20. However, the ratios measured for other taxa (i.e., the Bothremydini Zolhafah bella, Taphrosphyini, and Nigeremydini) are below 2.00, reflecting relatively anteroposteriorly shorter and dorsoventrally higher semicircular canals in the endosseous labyrinth. Comparison with both freshwater and marine turtle forms (both pleurodires and cryptodires) allows to identify morphological differences in the inner ears of bothremydids. This analysis provides new neuroanatomical evidence that confirms the previously proposed lifestyles for the different lineages within Bothremydidae.
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Nuevos datos sobre las tortugas de Riodeva (Teruel) en las X Jornadas Internacionales de Salas de los Infantes
One of the main lineages of stem turtles (i.e., Testudinata not attributable to the crown group Testudines) identified in the Iberian record is that of Paracryptodira. In this region, it is exclusively represented by members of the Pleurosternidae. Pleurosternidae is the only group of freshwater turtles identified in the Upper Jurassic record of both North America and Europe, showing a relatively high diversity in both regions. The North American record of this lineage is restricted to the Upper Jurassic. However, Pleurosternidae shows a notably wider temporal distribution in Europe, surviving at least until the last stage of the Lower Cretaceous (i.e., the Albian).
The information on the European members of Pleurosternidae was, until a few years ago, very limited. However, recent studies and, especially, the description of several new forms, allowed improving the knowledge on the diversity, systematic, and stratigraphic and palaeobiogeographic distributions of the forms that inhabited this continent. Although several forms are currently known for the Spanish record, the first described there was Riodevemys inumbragigas. It comes from the Kimmeridgian or Tithonian Barrihonda-El Humero fossil site, located in Riodeva, in the Teruel Province (South Iberian Basin). Other vertebrates found at this site include the sauropod Turiasaurus, the stegosaurid Dacentrurus, and the ornithopod Oblitosaurus.
Riodevemys inumbragigas was defined by a partial skeleton of an adult individual, including the almost complete shell, as well as several bones of the scapular and pelvic girdles. No other specimen has been attributed to it so far.
An unpublished partial skeleton of a turtle from the type locality of Riodevemys inumbragigas is presented here. It corresponds to a juvenile individual. Its attribution to Pleurosternidae is justified here. In fact, it is probably attributable to Riodevemys inumbragigas. However, differences in several shell characters relative to the holotype of this species are recognized. The possibility that some of these differences are due to ontogeny, but others to individual variability, are evaluated here considering the intraspecific variability known for Pleurosternidae.
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Nuevos datos sobre el crecimiento de la tortuga Toremys cassiopeia en las X Jornadas Internacionales de Salas de los Infantes
Pleurosternidae is a clade of freshwater paracryptodiran turtles recorded from the Kimmeridgian (Upper Jurassic) to the Albian (Lower Cretaceous) in North America and Europe. Despite recent advances in their taxonomy and diversity (particularly in the Iberian Peninsula with the description of Selenemys lusitanica, Riodevemys inumbragigas, Toremys cassiopeia, and Pleurosternon moncayensis) ontogenetic trajectories within the group are still poorly understood. Our knowledge of intraspecific variation within this lineage also remains relatively limited, with the notable exception of Pleurosternon bullockii, which has been recently investigated in detail. This lack of data has contributed to persistent ambiguities in the anatomical interpretation and phylogenetic placement of several pleurosternid taxa.
Toremys cassiopeia was described from the lower Albian bonebed of Ariño (Teruel, Spain), and represents the stratigraphically youngest known pleurosternid worldwide. Thus, it is currently the only pleurosternid taxon confirmed beyond the Berriasian extending the stratigraphic range of the group. Until now, T. cassiopeia was only known from adult or subadult specimens, limiting developmental interpretations.
In this context, this study presents shells and shells remains of nine unpublished specimens of T. cassiopeia from the same Albian bonebed (i.e., from the type locality of the taxon), representing different ontogenetic stages, including several identifiable as juveniles. These specimens offer, for the first time in the Iberian record, a detailed ontogenetic series for a pleurosternid turtle. The comparative analysis of juvenile and adult morphologies provides critical insights into developmental changes in shell architecture and diagnostic traits across ontogeny. These results contribute to refining the diagnosis of T. cassiopeia and clarifying its intraspecific variability across ontogeny. Furthermore, the ontogenetic patterns observed are compared with those recently documented for Pleurosternon bullockii, from the British Berriasian record, providing a broader evolutionary and paleobiogeographic framework for understanding developmental trends within Pleurosternidae. Thus, by documenting ontogenetic patterns in T. cassiopeia, this study also emphasizes the need to take growth-related variation into account within the systematic frameworks of fossil turtles (an essential step toward resolving long-standing taxonomic uncertainties within Pleurosternidae).
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Estudio de los primeros restos de pistosaurios de Oriente Medio en las X Jornadas Internacionales de Salas de los Infantes
Pistosauroids (Pistosauroidea, Eosauropterygia) are a monophyletic group of sauropterygians that include the well-known plesiosaurs (i.e., Plesiosauria) as well as other basal forms from the Triassic. This clade was the most successful among Sauropterygia considering that they were globally distributed and that their fossil record spans from the probably Lower Triassic (i.e., Olenekian) to the uppermost Cretaceous (i.e., Maastrichtian). The oldest record for Triassic pistosauroids probably occurs in the Lower Triassic, with the putative pistosauroid Corosaurus alcovensis, from the Olenekian of USA or, alternatively, with the pistosauroid Kwangsisaurus orientalis, from the Olenekian or earliest Anisian of China; whereas the youngest record is represented by the plesiosaurian Rhaeticosaurus mertensi from the Rhaetian (i.e., uppermost Triassic) of Germany. Most of these Triassic forms belong to the non-plesiosaur pistosauroids, with Bobosaurus forojuliensis from the Carnian (Upper Triassic) of Italy, having been hitherto considered as the youngest known representative. Non-plesiosaur pistosauroids are informally referred to as ‘pistosaurs’, previously considered to conform a monophyletic group (i.e., the Pistosauria) or, more recently, having been considered paraphyletic. ‘Pistosaurs’ remains have been recovered from USA, China, Europe, and North Africa. Nonetheless, the knowledge about this group is relatively limited relative to other Triassic sauropterygians due to the incompleteness of their fossil record and the lack of well-preserved specimens. The most abundant and best-preserved ‘pistosaur’ material corresponds to that of Yunguisaurus liae, from the Ladinian (Middle Triassic) of China, and Pistosaurus longaevus, from the Anisian (Middle Triassic) of Germany and Poland. In this sense, ‘pistosaurs’ have never been reported from any Middle East Triassic locality, where several other Triassic sauropterygian clades occur (i.e., Placodontia, Pachypleurosauria, Nothosauria, and Simosauridae), especially in the Middle Triassic levels of Makhtesh Ramon (Negev, south Israel). In this work, we present several unpublished vertebral remains from the Muschelkalk levels (Anisian or Ladinian) of Makhtesh Ramon. The vertebral material seems incompatible with any sauropterygian clade previously described in this region, but potentially akin to the non-plesiosaurian pistosauroids (i.e., ‘pistosaurs’). We provide here both preliminary anatomical descriptions and a systematic study of this vertebral material, in addition to an anatomical comparative study with other ‘pistosaurs’.
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jueves, 25 de septiembre de 2025
El esqueleto apendicular de Bauruemys elegans en las X Jornadas Internacionales de Salas de los Infantes
The studies of fossil turtles are normally focused on the shell and the skull. Thus, the appendicular skeleton is unknown for most fossil species. Bauruemys elegans is a podocnemidid turtle (Testudines, Pleurodira) described in the Upper Cretaceous (Turonian-Santonian) Adamantina Formation of Brazil. In Suarez (1969), the original publication where the taxon was described, the carapace, the plastron and the skull were characterised. All of them being part of the holotype, which also included both femora, coracoid and scapula, but they are not described or figured in that publication, and they remain unpublished.
Although some studies of this species were subsequently published, no appendicular elements have been so far figured or described. In the list of specimens that could be referred to this species elaborated by Gaffney et al. (2011) in the revision of the podocnemidid turtles, they noted that, in addition to the appendicular skeleton of the holotype, some other specimens also preserve elements of the appendicular skeleton. However, these elements were neither figured or described, and they remain unpublished.
We present here the first detail description of some elements of the appendicular skeleton of Bauruemys elegans. We characterised some elements of scapular and pelvic girdles, but also others of the limbs. These remains belonging to a partial unpublished individual of the species, deposited in the Muséum national d’Histoire naturelle of Paris (France). We compare these bones with those of other podocnemidids turtles, including both extinct and extant taxa.
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Reconstrucción de la red neurovascular del maxilar de Iguanodon en las X Jornadas Internacionales de Salas de los Infantes
The study of dinosaur neuroanatomy is a growing field. This field is mostly dominated by the study of the cavities of the central nervous system on the braincase. However, the increasing study of the neurovascular cavities on the rostral bones in recent years is allowing a more thorough reconstruction of the neurovascular system.
The trigeminal nerve is the primary somatosensory nerve that can be identified in the rostral bones. It stems from the forebrain and then divides into three main rostral divisions: the ophthalmic division (V1), the maxillary division (V2), and the mandibular division (V3). These branches with their corresponding arteries and veins run through bony canals in the nasal (V1), the maxilla (V2) and the dentary (v3). Its knowledge in Ornithopoda however, is so far limited to an indeterminate Dryosaurid, the elasmarian Galleonosaurus, the non hadrosaurid Styracosterna Fukuisaurus and the hadrosaurid Edmontosaurus. We explore this neurovascular network in the maxillae of the non hadrosaurid Styracosterna Iguanodon bernissartensis.
Two right maxillae (CMP11.1 and CMP11.2) retrieved from the upper Barremian “Arcillas de Morella” Formation at Morella (Castellón, Spain) were referred to the large-sized European ornithopod Iguanodon bernissartensis. To evaluate potential differences between these specimens and other dinosaurs, the maxillae were scanned using computed axial tomography (CT-scan).
The maxillary canal of the best preserved CMP11.1 has a relatively large diameter and runs longitudinally through the maxilla dorsal and labial to the roots of the teeth. This main canal branches into secondary canals that exit the maxilla through two rows of foramina in the lateral surface. The secondary canals that exit through the ventral row of seven foramina form an obtuse angle with the posterior part of main maxillary canal. The second row of four foramina emerge lateral to the main canal with a close to 90 degree angle in dorsal or ventral view. Finally, the main canal exits through the anterior maxillary foramen without branching.
Preservation of the second maxilla CMP11.2 is not as good as CMP11.1 but it also shows the same structure: a large main maxillary canal and some ventral and lateral rows of foramina. A comparison with the trigeminal V2 branch from a braincase of a different individual also referrable to I. bernissartensis shows a diameter very close to that of the posterior foramen in both maxillae, suggesting no drastic changes in the diameter of V2.
The maxillary canal has been described only in a handful of non-avian dinosaurs, especially in theropods. But among the clade Ornithopoda this structure has only described before in Galleonosaurus dorisae a basal elasmarian ornithopod from the Barremian of Australia (Wonthaggi Formation).
Both Iguanodon and Galleonosaurus share an obtuse angle of the secondary canals with the posterior portion of the main canal, however these secondary canals are noticeably longer in Iguanodon. Also, the number and distribution of the external foramina differ; in Galleonosaurus there is one predominant ventral row of foramina but in the anterior part of the maxilla the canal divides into multiple branches anterior to the antorbital fenestra. In Iguanodon the dorsal row of foramina is distributed in the anterior half of the bone, however in both taxa these dorsal foramina are located anterior to the ascending process of the maxilla. This suggests that the more spaced distribution in Iguanodon might be a product of the elongation of the anterior portion of the maxilla.
The dorsal alveolar canals in ornithopods are large and the secondary canals show a characteristic obtuse angulation which differs with the branching of these canals in other non-avian dinosaurs. The differences in the organization of the second dorsal row of secondary canals among ornithopods particularly the density, number of rows and position might be a product of the elongation of the preorbital region in Iguanodontia, absent in earlier branching ornithopods.
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El primer registro de sauropterigio procedente de Almería en las X Jornadas Internacionales de Salas de los Infantes
Sauropterygia was a successful group of aquatic reptiles with a fossil record spanning from the Olenekian (i.e., Lower Triassic) to the Maastrichtian (i.e., uppermost Cretaceous). Triassic sauropterygians can be divided into two main groups: Placodontia (i.e., durophagous forms) and Eosauropterygia, which included the most derived forms. Eosauropterygia groups the pachypleurosaurs (i.e., Pachypleurosauria); the nothosauroids (i.e., Nothosauroidea), which includes nothosaurs (i.e., Nothosauria) and simosaurs (i.e., Simosauridae); and the pistosauroids (i.e., Pistosauroidea), which includes ‘pistosaurs’ (i.e., non-plesiosaur pistosauroids) and plesiosaurs (i.e., Plesiosauria). With regards to the Spanish fossil record, all the main sauropterygian clades are represented, ranging from the Anisian (i.e., Middle Triassic) to the Maastrichtian (i.e., uppermost Cretaceous). The Spanish Triassic sauropterygian record is mostly represented by fragmentary and/or isolated remains being only diagnostic at supraspecific or suprageneric level. These remains come from Middle (i.e., Anisian and Ladinian) to Upper Triassic (i.e., probably Rhaetian) outcrops of several localities. Nonetheless, several Spanish Triassic sauropterygian species have been identified, some of them being common faunal components of other European Triassic localities (i.e., Lariosaurus balsami, Nothosaurus cf. giganteus, Nothosaurus cf. mirabilis); whereas others have been recognized as endemic Spanish forms (i.e., Parahenodus atancensis, Paludidraco multidentatus, Hispaniasaurus cranioelongatus). In this context, most of the Spanish Triassic sauropterygian remains come from the central and northeastern areas of this country, where they are represented by placodonts, pachypleurosaurs, nothosaurs, simosaurs, and pistosauroids. Conversely, sauropterygians remains in southern Spain are less abundant, having being recorded mostly from southeastern (i.e., Murcia, Jaén, Granada), but also from southwestern Spain (i.e., Huelva). Sauropterygians in southern Spain are represented by nothosaurs (i.e., Nothosaurus cf. mirabilis, Nothosaurus sp., Nothosauria indet.), pachypleurosaurs (i.e., Pachypleurosauria indet.), placodonts (i.e., Placodontia indet., Cyamodontoidea indet., Placochelyidae indet.), a probable ‘pistosaur’, a probable simosaur, and a probable nothosaur or placodont (i.e., cf. Nothosaurus/cf. Cyamodontoidea). We report here the first sauropterygian occurrence from the Triassic of Almería Province (southeastern Spain). It corresponds to an almost complete neural arch found in Sierra de Gádor in the Betic Cordillera. It is attributable to Eosauropterygia based on the presence of accessory intervertebral articulations (i.e., zygosphene-zygantrum complex) and the expanded neural arch pedicels with butterfly-shaped articulation areas for the centrum. The medium-sized neural arch displays a relative tall neural spine and short transverse processes, indicating potential nothosauroid affinities. We provide here a detailed anatomical description and the systematic study of the unpublished neural arch from Almería, in addition to a comparative analysis with the vertebrae of Eosauropterygia.
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miércoles, 24 de septiembre de 2025
Charla-coloquio: "Paleontología y Prehistoria en el Parque Natural Sabinares del Arlanza - La Yecla"
ecoSabinares
Viernes 3 de octubre de 2025 · Hortigüela (Burgos) · 12:30 h. Iglesia de la Asunción
PONENTES: Juan Luis Alonso Alonso. Catedrático (jubilado) de Geodinámica (Universidad de Oviedo). "Geología y relieve como base de diferentes usos del paisaje".
D. Fidel Torcida Fernández-Baldor. Director del Museo de Dinosaurios de Salas de los Infantes (Burgos). "Dinosaurios entre sabinas: un patrimonio (casi) desconocido".
D. Policarpo Sánchez Yustos. Profesor de Prehistoria. Universidad de Valladolid. I.P. Arqueosabinares. "Tras las huellas paleolíticas: novedades de Arqueosabinares".
D. Manuel A. Rojo Guerra. Catedrático de la Universidad de Valladolid. I.P. Arqueosabinares. "Novedades de Arqueosabinares sobre los primeros pastores y agricultores en el Parque Natural".
ecosabinares2025.comNuevos datos sobre las tortugas del Cretácico Inferior de Níger en las X Jornadas Internacionales de Salas de los Infantes
One of the most relevant fossil localities for understanding the Lower Cretaceous vertebrate record of the African continent is Gadoufaoua. This region is located in the Illumeden Basin, in the central region of Niger (Ténéré Desert, south-central region of the Sahara Desert). The fossil remains come from Aptian levels. Several lineages have been found there, including the identification of several pleurodiran turtles. This represents the oldest documented synchronistic and sympatric presence of several pleurodiran representatives in Africa, as well as one of the oldest globally. The first study of this turtle fauna was published in the early 1980s. Broin (1980) documented the presence of at least three taxa. One of them, attributed to the new turtle Taquetochelys decorata, was recognized as belonging to the extinct lineage Araripemydidae. The other two turtles from Gadoufaoua were identified as belonging to ‘Pelomedusidae (s.l.)’, a term used by her to group the podocnemidids, the pelomedusids, and the bothremydids, but not the araripemydids nor the chelids. One of them was defined as a new species, Teneremys lapparenti, but the other was referred to as Platycheloides cf. nyasae.
Taquetochelys decorata is the only species of Araripemydidae identified in Africa. Both its cranial and postcranial anatomy are well-known, so that it represents one of the best characterized Cretaceous pleurodiran turtles. Almost 40 years after the study of Broin (1980), the shell from Gadoufaoua attributed by her to Platycheloides cf. nyasae, as well as other shells and carapacial remains corresponding to the same species, were detailed studied. They were attributed to a new taxon, Francemys gadoufaouaensis, exclusive to that locality. This turtle was recognized as a representative of Pelomedusoides closely related to Podocnemidoidea, but not attributable to this clade or to any of the families so far defined.
Teneremys lapparenti was defined by a shell fragment (preserving the partial carapace but a very small area of the plastron) associated with a skull (partially visible only in ventral view). An isolated nuchal plate was tentatively attributed to it. New information relative to the cranial anatomy of Teneremys lapparenti was subsequently provided, but not on its shell. Since Francemys gadoufaouaensis is only known from the shell, new data on this anatomical region in Teneremys lapparenti would be vital for comparing both taxa and, consequently, for better understanding how the successful radiation experienced by the Pelomedusoides in northern Gondwana during the Aptian-Cenomanian interval occurred (see Pérez-García, 2019b). In fact, the scarce shell information currently available on Teneremys lapparenti allows to recognize that it shares several derived characters in relation to other forms of Pelomedusoides with Francemys gadoufaouaensis, to which it may be closely related.
Abundant shell remains from Gadoufaoua compatible with Teneremys lapparenti, including several relatively complete shells, are available for study. This material is presented here. Thanks to the analysis of these fossils, some preliminary conclusions related to the diversity and disparity of Pelomedusoides during the Early Cretaceous, as well as concerning the precise phylogenetic position of the representatives from Gadoufaoua, are proposed.
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Científicos del CONICET descubren en Chubut un dinosaurio carnívoro que habría sido de los últimos en extinguirse
El hallazgo, publicado por la revista Nature Communications, tuvo lugar en el centro sur de la provincia del Chubut y entre los aspectos más interesantes, se destaca la presencia de un húmero de un crocodiliforme entre las mandíbulas
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| Reconstrucción en vida del nuevo dinosaurio carnívoro Joaquinraptor casali. Ilustración por Andrew McAfee, Carnegie Museum of Natural History. |
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| El equipo armando el bochón de Joaquinraptor. Foto: gentileza investigadores. |
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| Área del hallazgo “Valle Joaquín” (Ea. Puesto El Colorado). Foto: gentileza Marcelo Luna. |
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| Área del hallazgo “Valle Joaquín” (Ea. Puesto El Colorado). Foto: gentileza Marcelo Luna |
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| Foto de los primeros huesos observados de Joaquinraptor casali. |
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| Mandíbula derecha de Joaquinraptor casali. Foto: gentileza Marcelo Luna. |
El estudio en detalle de su anatomía permitió incrementar considerablemente el conocimiento de los Megaraptoridae como así también sus relaciones filogenéticas y distintos aspectos de la paleoecología de estos dinosaurios carnívoros: “El hecho de haber encontrado un brazo articulado como en este caso es muy importante porque agrega mucha información a la osteología de este grupo para poder compararlo con otros miembros. Al grupo ya lo conocíamos, aunque alguno de los nuevos materiales recuperados, por ejemplo el maxilar, ahora se pueden comparar por primera vez con otros miembros del grupo. Por lo tanto, este hallazgo es importante porque agrega mucha información para conocer la osteología y, en algún punto también, la historia evolutiva de los Megarraptóridos”, finaliza el especialista del CONICET.
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| Reconstrucción del esqueleto de Joaquinraptor casali. En color azul se muestran los huesos recuperados (Reconstrucción realizada por T.K. Robinson and Andrew McAfee) |
Referencia bibliográfica:
Ibiricu, L.M., Lamanna, M.C., Alvarez, B.N. et al. Latest Cretaceous megaraptorid theropod dinosaur sheds light on megaraptoran evolution and palaeobiology. Nat Commun 16, 8298 (2025). DOI: https://doi.org/10.1038/s41467-025-63793-5
martes, 23 de septiembre de 2025
ECO-SABINARES · Feria de Espacios Naturales: productos y servicios
En Burgos del 3 al 13 de octubre 2025 · 2ª edición
Programación de actividades (pinche aquí).
Charla-coloquio: "Paleontología y Prehistoria en el Parque Natural Sabinares del Arlanza - La Yecla". Sábado 3 de octubre, 12:30 h. Iglesia de la Asunción (Hortigüela). Fidel Torcida, Director del Museo de Dinosaurios, participará en una charla junto a Manuel Rojo, catedrático de la UVA, Juan Luis Alonso, catedrático de la Universidad de Oviedo y Policarpo Sánchez, profesor de Prehistoria de la UVA.
El próximo 3 de octubre tendrá lugar en Hortigüela la inauguración de la II Feria Ecosabinares, un espacio de encuentro dedicado a la cultura, la naturaleza, la sostenibilidad y las tradiciones de nuestra comarca.
Durante estos días, se desarrollará un amplio programa de actividades abiertas a todos los públicos: talleres, charlas, rutas, exposiciones y propuestas para disfrutar en familia y en comunidad.
La clausura de la feria será el 13 de octubre en Mecerreyes, poniendo el broche final a más de una semana de experiencias compartidas.
El esqueleto postcraneal de los alodaposúquidos de Lo Hueco en las X Jornadas Internacionales de Salas de los Infantes
Allodaposuchidae is an eusuchian clade endemic to the Late Cretaceous of Europe, which has become a keystone in our knowledge of early eusuchian evolution in recent decades. The first allodaposuchid species to be described, Allodaposuchus precedens Nopcsa, 1928, was based on fossil remains from the Maastrichtian of Romania. Since then, several new species have been described at various Campanian-Maastrichtian fossil sites in Spain and France. Most of the described allodaposuchids lack or only preserve scarce postcranial remains. Consequently, the abundant postcranial fossil remains of allodaposuchids from the Lo Hueco fossil site (Cuenca, Spain) are of particular importance in addressing the anatomy of these basal eusuchians. At the Lo Hueco site, two allodaposuchids have been described: Lohuecosuchus megadontos and Agaresuchus fontisensis. These two sympatric and synchronic species were first described using the cranial remains that were available at the time. In contrast, the postcranial anatomy of these species was only preliminarily explored in a number of studies.
Despite the recognition of two different postcranial morphotypes (appendicular and axial) among the remains of Lo Hueco, these could not be confidently assigned to either of the two allodaposuchid species from this site. In parallel, there has been a surge of interest in the postcranial skeleton of crocodylomorphs in general, and eusuchians in particular, with different aspects like their morphology, functional biology, and disparity being explored. Numerous studies have emphasized a previously underestimated disparity and locomotor complexity, with significant evolutionary implications. In this context, the importance of a deeper study of allodaposuchid postcranial anatomy is highlighted.
Following the association between a series of postcranial remains and the holotype of Agaresuchus fontisensis, along with previous work on morphotype identification, one of the vertebral morphotypes from Lo Hueco can now be confidently assigned to one of the two recognized allodaposuchid species. Consequently, the second morphotype can be reasonably attributed to the other species. This study formally establishes the taxonomic identity of the axial eusuchian morphotypes previously recognized at Lo Hueco, with the one formerly presented as “robust” being L. megadontos and the one presented as “slender” being A. fontisensis. In addition, the morphology of the vertebral elements belonging to both species is described and compared. As a consequence of these results, the axial record of the Lo Hueco allodaposuchids becomes a valuable dataset for future studies regarding the macroevolutionary transformations of the postcranial skeleton in early eusuchians.
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¿Cómo se desplazaría un dinosaurio cojo? Entendiendo los límites de la locomoción de un ornitópodo de la Formación Arcillas de Morella en las X Jornadas Internacionales de Salas de los Infantes
Locomotion in non-avian dinosaurs is one of the most captivating aspects of the modern paleobiology of vertebrates. Despite the obvious constraints, the validation of biomechanical studies using fossils can be developed by a variety of methods: building of musculoskeletal models, analyzing fossilized footprints, comparing them with extant taxa, and studying the osseous elements. Among non-avian dinosaurs, a significant research on the reconstruction of inferred locomotion in styracosternan ornithopods has been conducted in recent years. Additionally, these dinosaurs are also known to have had a high number of palaeopathologies among the Mesozoic terrestrial vertebrates. Nevertheless, it is extremely rare to find pathologies or anomalous anatomical conditions affecting the mechanical processes of normal gait in any group of non-avian dinosaurs, considering the nature of the fossil record. Non-hadrosauroid styracosternan ornithopods are one of the best represented dinosaurs in the Lower Cretaceous European terrestrial vertebrate fossil record. In this context, the Arcillas de Morella Formation, in northeastern Spain, has provided a large amount of evidence for more than a decade. Among these, a nearly complete adult specimen from the Mas de la Parreta Quarry (CMP-5), characterized by several pathologies in its axial bones, exhibits an osteological anomaly in its left ilium. This anomaly consists of a markedly different morphology and proportions compared to its right counterpart. This results in a noticeable asymmetry of the pelvic girdle that affects the suprailiac crest and iliac plate muscle origins, mainly M. iliofemoralis, M. iliotibialis and possibly M. iliofibularis. Additionally, the morphology of the acetabulum would also be affected by this asymmetry. To analyze how this anomalous condition would affect the dinosaur, both 3D models of the pelvic girdle and the hindlimbs were created. Consequently, we have used photogrammetry to reconstruct the pelvis, right fibula and the first caudal vertebra of this individual. Additionally, photogrammetry was also implemented to finalize the reconstruction of the hindlimbs by utilizing bone elements from other individuals from the same fossiliferous area. These were scaled according to the proportions of the studied individual. Finally, the virtual skeleton was assembled using Blender software, establishing the areas of muscle origins and insertions. Therefore, the musculature reconstruction of this styracosternan provides a detailed examination of an unusual pelvic condition observed in a non-avian dinosaur. Regarding its lifestyle, this condition likely caused the styracosternan ornithopod to limp.
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domingo, 21 de septiembre de 2025
Así es el pequeño pueblo de Burgos enclave histórico de la Sierra de la Demanda
Mambrillas de Lara conserva vestigios como las huellas de dinosaurio del yacimiento de La Pedraja, la ermita visigoda de Quintanilla de las Viñas y el dolmen megalítico de Cubillejo de Lara, en un entorno natural clave en la historia de Castilla.
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| Ermita visigótica de Nuestra Señora de las Viñas. Ayuntamiento de Mambrillas de Lara. |
El núcleo urbano de Mambrillas de Lara destaca por su arquitectura serrana, reflejo de la tradición popular y la adaptación al entono de montaña. Aunque la población actual no pasa del medio centenar, el municipio fue en la Edad Media uno de los principales centros del antiguo Alfoz de Lara, marcando un hito en el desarrollo castellano en el siglo XI. Entre los ejemplos de patrimonio arquitectónico en Mambrillas de Lara sobresale la iglesia de San Juan Bautista, construcción de finales del siglo XV, cuyo estilo gótico tardío pone de manifiesto la pujanza que tuvo la localidad. El entorno inmediato también forma parte de un enclave privilegiado para aficionados al senderismo y cicloturismo, ya que desde el mismo pueblo parten rutas hacia cumbres cercanas como La Cueva y La Muela, además de conectar, a través de antiguos caminos, con espacios emblemáticos como la ermita de San Olav de Covarrubias y el monasterio de San Pedro de Arlanza.
Mambrillas de Lara: historia, naturaleza y patrimonio
Ubicado en un entorno montañoso dominado por la Sierra de la Demanda y cercano a parajes como el río Arlanza y la Fuente Azul, Mambrillas de Lara ofrece un paisaje de bosques y montes de gran atractivo para los visitantes. El área, que forma parte de la Sierra de las Mamblas y del parque natural del mismo nombre, cuenta con una rica biodiversidad y constituye un destino destacado para quienes buscan turismo rural, observación de la naturaleza y actividades culturales. Los senderos que parten del municipio permiten alcanzar miradores naturales y conectan con puntos de interés histórico en toda la comarca.
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| El yacimiento de La Pedraja conserva más de un millar de huellas repartidas en 14 afloramientos, pertenecientes a 123 icnoespecies de dinosaurios. MALOPEZ |
La ermita de Quintanilla de las Viñas: un vestigio visigodo único
En el ámbito del patrimonio histórico-artístico destaca la ermita de Santa María de Quintanilla de las Viñas, reconocida Bien de Interés Cultural desde 1929. Se trata de uno de los ejemplos más sobresalientes de arquitectura religiosa visigoda en la península ibérica, construido presumiblemente entre finales del siglo VII y comienzos del siglo VIII. El templo conserva parte de sus muros originales, y su decoración es especialmente relevante por la presencia de relieves de motivos florales, geométricos y zoomorfos organizados en bandas horizontales, una iconografía rara en los espacios cultuales cristianos de su época. Quintanilla de las Viñas forma parte de los circuitos culturales visigodos recomendados por la Junta de Castilla y León y sigue siendo objeto de estudio arqueológico.
El dolmen de Cubillejo de Lara: monumento megalítico de referencia
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| Imagen del Dolmen de Cubillejo de Lara. JCyL |
sábado, 20 de septiembre de 2025
El Museo del Jurásico de Asturias recupera los restos fósiles de un gran dinosaurio saurópodo en Ribadesella
El equipo científico del MUJA lleva a cabo los trabajos en colaboración con los investigadores Pablo Puerta, del Museo de Trelew (Argentina), y el paleontólogo Oliver Rauhut
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| En la imagen, el equipo científico y la consejera de Cultura, Vanessa Gutiérrez, segunda por la derecha en la segunda fila. Gobierno de Asturias |
Las dificultades para acceder al yacimiento, el peso de los bloques y el valor excepcional del material recuperado hicieron necesario que ayer se recurriera a la ayuda del helicóptero del Servicio de Emergencias del Principado (SEPA) para trasladarlos desde el acantilado hasta la playa de Vega.
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| El helicóptero del Principado trasladando uno de los bloques. MUJA |
El traslado
La operación consistió en el traslado de un bloque de gran tamaño con la escápula. Desde allí, el Ayuntamiento de Colunga se encargará de su transporte hasta el Museo.
En las fases previas de la excavación, la Guardia Civil había colaborado en el traslado de herramientas y materiales al lugar.
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| La consejera de Cultura se desplazó a Ribadesella y se reunió con responsables del equipo científico del MUJA. Detrás, el helicóptero. Gobierno de Asturias |
El equipo científico del MUJA, formado por José Carlos García-Ramos y Laura Piñuela, trabaja junto con Puerta y Rauhut en esta segunda campaña, que da continuidad a la realizada en julio.
La primera campaña
En aquella primera fase ya se recuperaron varias vértebras caudales, un pubis, un isquion, una costilla completa, cuatro chevrones y un bloque con vértebras de la cola.
Los trabajos en este yacimiento continuarán el próximo año, según ha confirmado el Principado.
La extracción de todos los restos
El Gobierno asturiano estima que serán necesarias al menos dos o tres campañas más para extraer todos los restos fósiles de este dinosaurio saurópodo, un animal cuadrúpedo, herbívoro, de cuello y cola largos, cuyo tamaño se calcula en unos 20 metros de longitud, mayor de lo previsto inicialmente.


























