Journal of Vertebrate Paleontology最新文献

{"title":"An Upper Miocene marine turtle from panama that preserves osteocytes with potential DNACitation for this article: Cadena, E.A., De Gracia, C., &amp; Combita-Romero, D. A. (2023) An Upper Miocene marine turtle from Panama that preserves osteocytes with potential DNA. <i>Journal of Vertebrate Paleontology</i> . https://doi.org/10.1080/02724634.2023.2254356","authors":"Edwin-Alberto Cadena, Carlos De Gracia, Diego A. Combita-Romero","doi":"10.1080/02724634.2023.2254356","DOIUrl":"https://doi.org/10.1080/02724634.2023.2254356","url":null,"abstract":"ABSTRACTLepidochelys is a genus of extant marine turtles that includes the critically endangered Kemp's Ridley turtle. The evolutionary history of this genus is poorly understood due to the lack of an undisputed fossil record for the group. Here we describe a partially preserved carapace from the Upper Miocene Chagres Formation of Panama, which represents the oldest fossil record of Lepidochelys. The specimen has rectangular, anteroposteriorly short pleural scutes, a characteristic shared with members of Lepidochelys. It is potentially closely related to L. olivacea because it shares a similar number of pleurals, but its precise taxonomic status remains uncertain. We discuss the ecological role that a marine turtle played in the paleoecosystem of the Chagres Formation. The new specimen exhibits exceptional preservation of bone sutures, sulci, sculpturing, and bone microstructure, including remains of blood vessels, collagen fibers, and osteocytes. This is the first time that a histochemical stain (DAPI) indicates preservation of a compound consistent with DNA in a fossil vertebrate outside Dinosauria. These data demonstrate the potential for DNA to persist in specimens that are both millions of years old and are from lower latitudes, which challenges traditional paradigms of biomolecular preservation. ACKNOWLEDGMENTSWe thank S. Evers for sharing photos of some extant taxa. Thanks to curators of different institutions that allowed access to collections to examine specimens, including: Instituto de Ciencias Naturales, Universidad Nacional de Colombia (Bogotá, Colombia), Senckenberg Natural History Collections (Dresden, Germany), Muséum national d'histoire naturelle (Paris, France), Naturhistorisches Museum Wien (Vienna, Austria), Smithsonian National Museum of Natural History (Maryland, U.S.A.), and Museo de la Salle, Universidad de la Salle (Bogotá, Colombia). Thanks to F. Rodriguez and to A. Osorio for their help during the field excavations. Our thanks to the Dirección de Recursos Minerales of Panamá for field collection permits and to K. Cardenas and C. de León from Smithsonian Tropical Research Institute for helping us on transport permits to study the specimen. Two anonymous reviewers and editor T. Lyson made constructive suggestions for improvement of the manuscript. Thanks to R. Perez S.A. for the vehicles used during the field explorations. The study resulted in part from a project, which is funded to C. De Gracia by the program of young researchers (grant No. APY–N110–016A) and the Doctoral and Postdoctoral Scholarships Program of the National Secretary of Science and Technology of Panama (Grant No. BIP2018–004). Funding was granted to E-A. Cadena from Dirección de Investigaciones e Innovación (DIeI) Universidad del Rosario, Proyectos de Investigación, grant IV-FMD001, 2022.AUTHOR CONTRIBUTIONSE-AC and C.D-G designed the project. E-AC and D. A.C-R gathered, analyzed the data, and wrote the first draft of the manuscript. All authors edited","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135344612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Kansastega</i>, nom. nov., a replacement name for <i>Microstega</i> Hooks, preoccupied by Meyrick","authors":"Skye N. McDavid, G. E. Hooks","doi":"10.1080/02724634.2023.2252648","DOIUrl":"https://doi.org/10.1080/02724634.2023.2252648","url":null,"abstract":"ABSTRACTThe genus name of the Cretaceous protostegid turtle Microstega Hooks, 1998 (type species Microstega copei Wieland, 1909) is preoccupied by Microstega Meyrick, 1890 (type species Microstega pandalis Hübner, 1825), a modern lepidopteran. The new name Kansastega McDavid & Hooks nom. nov. is proposed to replace the junior homonym, with the new combination Kansastega copei (Wieland, 1909). ACKNOWLEDGMENTSWe thank an anonymous reviewer and JVP editor G. Bever for useful comments, and D. Erhet (New Jersey State Museum) for helping put the authors in contact with each other.AUTHOR CONTRIBUTIONSSNM discovered the homonymy between Microstega Hooks and Microstega Meyrick and drafted the manuscript. GEH conducted the research that demonstrated this turtle warranted its own genus name.","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134912038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction","authors":"","doi":"10.1080/02724634.2023.2254075","DOIUrl":"https://doi.org/10.1080/02724634.2023.2254075","url":null,"abstract":"","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42573749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First report of “Mammut” (Mammalia, Proboscidea) from the Upper Miocene of Turkey","authors":"G. Konidaris, A. I. Aytek, A. Yavuz, Erhan Tarhan, M. C. Alçiçek","doi":"10.1080/02724634.2023.2222784","DOIUrl":"https://doi.org/10.1080/02724634.2023.2222784","url":null,"abstract":"ABSTRACT Mammutidae comprise a proboscidean family that originated in Africa during the late Oligocene, dispersed across the Holarctic during the Miocene, and survived in North America until the end of the Pleistocene. Despite their long evolutionary history and wide geographic distribution mammutids are particularly scarce in the Miocene of Eurasia. Here, we present a new mammutid specimen (an upper deciduous premolar) from the Upper Miocene locality of Sazak in southwestern Turkey. Morphological and metric traits of the tooth, in particular the well-expressed zygodonty, are distinct from the more basal Zygolophodon and permit its assignment to the more derived “Mammut.” Due to the absence of more diagnostic specimens, a specific attribution is not possible; however, considering the Turolian age of the associated fauna an attribution to the Late Miocene representative of the genus, “Mammut” obliquelophus, is possible. Turolian mammutids are rare in the fossil record and therefore our knowledge remains only fragmentary. Despite the existence of a single specimen, the presence of this genus in Sazak corresponds to its first report in the Upper Miocene of Turkey, as well as the first one in western Asia. The presence of “Mammut” in the Upper Miocene of China was recently confirmed, and therefore the record of “Mammut” at Sazak, i.e., at the western margin of Asia, not only adds to the scanty record of the genus in the Upper Miocene of Eurasia but also provides another line of evidence of the paleozoogeographic link enabling Europe–East Asia proboscidean interchanges during the Late Miocene.","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47031322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pliocene pre-GABI herbivorous mammals from Espinar, Peruvian Andean Plateau","authors":"R. Salas-Gismondi, Diana Ochoa, J. Gamarra, F. Pujos, D. Foster, Julia V. Tejada","doi":"10.1080/02724634.2023.2237079","DOIUrl":"https://doi.org/10.1080/02724634.2023.2237079","url":null,"abstract":"ABSTRACT Pliocene South American mammals prior to the Great American Biotic Interchange comprise the evolutionary pinnacle of a long-lasting process of continental isolation, in which large-scale orogeny and climate change were instrumental. These processes resulted in unique assemblages of extinct groups with peculiar anatomies. However, interpretation of the functional roles that these organisms would have played in the ecosystem is challenging because well-preserved fossils of this time interval in South America are scarce. Here, we describe a new Early Pliocene assemblage of native herbivorous megamammals documented by skeletons in anatomical connection from the Peruvian Andean plateau (city of Yauri in Espinar, Cusco Department). Fossil-bearing deposits pertain to Member C of the El Descanso Formation dated at 4.75 ± 0.5 Ma, when the plateau attained near-modern elevations and a Puna-type plant ecosystem. The mammal assemblage is dominated by xenarthrans, including three ground sloths (cf. Megatheriops rectidens, Simomylodon uccasamamensis, and Proscelidodon sp.) and Andinoglyptodon mollohuancai gen. et sp. nov., the first Pliocene glyptodontine known by a well-preserved cranium and dermal armor. Notoungulates are represented by the toxodontid Posnanskytherium viscachanense. Both selective and bulk feeders are identified, suggesting the existence of diverse plant resources in the Pliocene Puna ecosystem. These native mammals constituted the typical Pliocene herbivorous guild of the central Andean plateau and provide an opportunity to investigate the structure of mammalian communities just before the arrival of Holarctic immigrants. RESUMEN Los mamíferos sudamericanos del Plioceno previos al Gran Intercambio Biótico Americano constituyen el pináculo evolutivo de un proceso prolongado de aislamiento continental, en el que la orogenia a gran escala y el cambio climático fueron fundamentales. Estos procesos resultaron en ensambles únicos de grupos extintos con anatomías inusuales. Sin embargo, la interpretación de los roles funcionales que estos organismos habrían jugado en el ecosistema es un reto porque fósiles bien preservados de este intervalo temporal en Sudamérica son escasos. Aquí, describimos un nuevo ensamble de megamamíferos herbívoros nativos del Plioceno temprano documentado por esqueletos en conexión anatómica del altiplano Andino peruano (ciudad de Yauri en Espinar, departamento de Cusco). Los depósitos con fósiles pertenecen al Miembro C de la Formación El Descanso datados en 4.75 ± 0.5 Ma, cuando el altiplano alcanzó elevaciones casi iguales a las modernas y un ecosistema de plantas de tipo Puna. El ensamble de mamíferos está dominado por xenartros, incluídos tres perezosos terrestres (cf. Megatheriops rectidens, Simomylodon uccasamamensis y Proscelidodon sp.) y Andinoglyptodon mollohuancai gen. et sp. nov., el primer gliptodonte del Plioceno conocido por elementos craneales y la armadura dérmica bien conservados. Los notungulado","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45878856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anatomy and phylogenetic affinities of a new silesaurid assemblage from the Carnian beds of south Brazil","authors":"Gabriel Mestriner, Júlio C. A. Marsola, S. Nesbitt, Á. A. Da-Rosa, M. Langer","doi":"10.1080/02724634.2023.2232426","DOIUrl":"https://doi.org/10.1080/02724634.2023.2232426","url":null,"abstract":"ABSTRACT New specimens and the reassessment of many silesaurids have recently shed light on the origin and early evolution of dinosaurs and their close relatives. Yet, the group is relatively poorly represented in South America, an area that likely played an important role in dinosaurian origins. Since the discovery of Sacisaurus agudoensis from the Norian Caturrita Formation, only the fragmentary Gamatavus antiquus and Amanasaurus nesbitti have been reported from the Triassic of south Brazil. Here we describe disarticulated silesaurid remains from Waldsanga, one of the most important tetrapod-bearing localities of the Santa Maria Formation, which represent the second Carnian occurrence of the group in Brazil. The postcranial elements exhibit a combination of dinosauromorph symplesiomorphies and silesaurid diagnostic traits, showing that a conservative anatomy is pervasive among early dinosauromorphs. We also conducted a set of exploratory analyses to infer the phylogenetic relations of the new occurrence and the robustness of some of the most recent phylogenetic hypotheses in face of the increasing diversity of Silesauridae. This revealed a rather uncertain evolutionary scenario not only for Silesauridae, but for early dinosauromorphs in general.","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44361658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Endocranial anatomy of Allosaurus supports neural trends among non-avian theropod dinosaurs","authors":"Emily J Lessner, Corrine Cranor, R. Hunt-Foster, C. Holliday","doi":"10.1080/02724634.2023.2236161","DOIUrl":"https://doi.org/10.1080/02724634.2023.2236161","url":null,"abstract":"ABSTRACT Endocranial cavities preserve a record of neural anatomy often used for hypotheses of behavior in extinct organisms. Two reconstructions of cranial endocasts of Allosaurus fragilis and A. jimmadseni from computed tomography data expand understanding of theropod endocranial anatomy including endocranial volume, inner ear shape, and trigeminal ganglion size. Endocranial and trigeminal ganglion volumes are compared with a sample of birds, crocodylians, and non-avian theropod dinosaurs. Allosaurus is found to have a relatively small trigeminal foramen for its body size when compared with foramina of birds and crocodylians. The inner ear is fragmentary but similar in shape to semicircular canals of other large-bodied theropod dinosaurs. These findings suggest Allosaurus had generalist neural structures relative to other non-avian theropod dinosaurs. Like other large-bodied theropod dinosaurs, Allosaurus likely had a large dural venous sinus, potentially important for brain cooling. Allosaurus did not have a derived sense of facial somatosensation akin to that found in crocodylians or some birds. Additional data like these, collected from other tetanuran dinosaurs, will help clarify the evolution of neurosensory systems in the lineage.","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44284553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new squaloziphiid-like odontocete from the Early Miocene of Patagonia expands the cetacean diversity in the southwestern Atlantic Ocean","authors":"C. Gaetan, F. Paolucci, M. Buono","doi":"10.1080/02724634.2023.2232425","DOIUrl":"https://doi.org/10.1080/02724634.2023.2232425","url":null,"abstract":"ABSTRACT The Early Miocene Gaiman Formation, from Argentina, houses a taxonomic variety of odontocetes, mainly dominated by platanistoids and physeteroids. In this work, we describe a new medium-sized odontocete, Crisocetus lydekkeri gen. et sp. nov., based on a partial skull, which expands the diversity of odontocetes in the Early Miocene beds of Patagonia (Argentina). The phylogenetic analyses placed C. lydekkeri within the crown Odontoceti, stemward to delphinidans, ziphiids, and physeteroids. Crisocetus lydekkeri displays a set of characters that are shared with the members of the Squaloziphiidae family (i.e., Squaloziphius emlongi and Yaquinacetus meadi), such as a massive postglenoid process of the squamosal, ventrally longer than the posttympanic process and the exoccipital; apex of postglenoid process anteroposteriorly longer than transversely thick; presence of a deep emargination by a neck muscle fossa on the posterior end of the zygomatic process; basioccipital crests forming an angle of circa 70–90°; and a basioccipital width wider than 51% of the skull width in ventral view. Thus, we recognize a squaloziphiid-like morphology shared by C. lydekkeri, S. emlongi, Y. meadi, and even Dolgopolis kinchikafiforo. Our phylogenetic analyses partially support the inclusion of C. lydekkeri within Squaloziphiidae, however this family is recovered with low support. Finally, the presence of C. lydekkeri and even D. kinchikafiforo in the Early Miocene of Patagonia expands the paleogeographic distribution of squaloziphiid-like forms to the southwest coast of the Atlantic Ocean, suggesting that these taxa had an almost antitropical distribution.","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43135377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Miocene ‘ovibovin’ bovids (Mammalia, Bovidae) from Çorakyerler, Turkey","authors":"D. Kostopoulos, A. Erol, Serdar Mayda","doi":"10.1080/02724634.2023.2232850","DOIUrl":"https://doi.org/10.1080/02724634.2023.2232850","url":null,"abstract":"ABSTRACT Fossil ‘ovibovin’ bovids are described from the Upper Miocene of Çorakyerler (north-central Anatolia). Two taxa have been recognized: the predominant Criotherium argalioides, known by several craniodental remains, and the less common Hezhengia? cf. inundata, documented by a few dentitions. A review of C. argalioides records from Samos and Kemiklitepe D and a thorough comparison with the Çorakyerler sample provides new data on the morphological and metric variability of this taxon, as well as its chronological and geographic range. Hezhengia? cf. inundata from Çorakyerler reveals important similarities with the Garkin (Turkey) taxon, which, in contrast to previous studies, we find more similar to the Chinese Hezhengia than to the Chinese Plesiaddax as originally suggested. The same is true for “Plesiaddax” simplex from Kayadibi (Turkey), which is referred to as Hezhengia? simplex. The co-occurrence of two ‘ovibovin’ bovids of similar size in the same assemblage was previously suspected but never before documented.","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47624127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First occurrence of pterosaurs in Ukraine from the Albian (Lower Cretaceous) Burim Formation, Kaniv Natural Reserve","authors":"Tymofii Sokolskyi","doi":"10.1080/02724634.2023.2238000","DOIUrl":"https://doi.org/10.1080/02724634.2023.2238000","url":null,"abstract":"","PeriodicalId":17597,"journal":{"name":"Journal of Vertebrate Paleontology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46630899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}