Palaeontology最新文献_第4页

Dental microwear texture analysis reveals a likely dietary shift within Late Cretaceous ornithopod dinosaurs 牙齿微磨损结构分析揭示了晚白垩纪鸟脚亚目恐龙可能的饮食转变

IF 2.6 2区地球科学

Palaeontology Pub Date : 2023-12-01 DOI: 10.1111/pala.12681

Tai Kubo, Mugino O. Kubo, Manabu Sakamoto, Daniela E. Winkler, Masateru Shibata, Wenjie Zheng, Xingsheng Jin, Hai-Lu You

{"title":"Dental microwear texture analysis reveals a likely dietary shift within Late Cretaceous ornithopod dinosaurs","authors":"Tai Kubo, Mugino O. Kubo, Manabu Sakamoto, Daniela E. Winkler, Masateru Shibata, Wenjie Zheng, Xingsheng Jin, Hai-Lu You","doi":"10.1111/pala.12681","DOIUrl":"https://doi.org/10.1111/pala.12681","url":null,"abstract":"Dinosaurs were the dominant megaherbivores during the Cretaceous when angiosperms, the flowering plants, emerged and diversified. How herbivorous dinosaurs responded to the increasing diversity of angiosperms is largely unknown due to the lack of methods that can reconstruct diet directly from body fossils. We applied dental microwear texture analysis (DMTA), an approach that quantifies microtopography of diet-induced wear marks on tooth surfaces, to ornithopods, the dinosaur clade that includes taxa with the most sophisticated masticatory system. We found that Late Cretaceous ornithopods have significantly rougher dental microwear texture (DMT) compared to pre-Late Cretaceous ornithopods, and DMT variation increased in hadrosaurids, a derived Late Cretaceous ornithopod clade. These changes indicate a likely temporal dietary shift towards more abrasive foodstuffs within ornithopods, probably due to the increased ingestion of phytoliths (amorphous silica bodies in plants). Phytoliths are a main source of rough DMT in modern herbivores, along with exogenous dust and grit, and were generally more concentrated in Late Cretaceous angiosperms than in other major plant groups. Our results show that DMTA of the occlusal enamel surface can be used to reconstruct the diets of herbivorous dinosaurs, with a resolution superior to conventional methods.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138534732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inaccurate fossil placement does not compromise tip-dated divergence times 化石位置的不准确并不会影响分化时间

IF 2.6 2区地球科学

Palaeontology Pub Date : 2023-11-22 DOI: 10.1111/pala.12680

Nicolás Mongiardino Koch, Russell J. Garwood, Luke A. Parry

{"title":"Inaccurate fossil placement does not compromise tip-dated divergence times","authors":"Nicolás Mongiardino Koch, Russell J. Garwood, Luke A. Parry","doi":"10.1111/pala.12680","DOIUrl":"https://doi.org/10.1111/pala.12680","url":null,"abstract":"Time-scaled phylogenies underpin the interrogation of evolutionary processes across deep timescales, as well as attempts to link these to Earth's history. By inferring the placement of fossils and using their ages as temporal constraints, tip dating under the fossilized birth–death (FBD) process provides a coherent prior on divergence times. At the same time, it also links topological and temporal accuracy, as incorrectly placed fossil terminals should misinform divergence times. This could pose serious issues for obtaining accurate node ages, yet the interaction between topological and temporal error has not been thoroughly explored. We simulate phylogenies and associated morphological datasets using methodologies that incorporate evolution under selection, and are benchmarked against empirical datasets. We find that datasets of 300 characters and realistic levels of missing data generally succeed in inferring the correct placement of fossils on a constrained extant backbone topology, and that true node ages are usually contained within Bayesian posterior distributions. While increased fossil sampling improves the accuracy of inferred ages, topological and temporal errors do not seem to be linked: analyses in which fossils resolve less accurately do not exhibit elevated errors in node age estimates. At the same time, inferred divergence times are biased, probably due to a mismatch between the FBD prior and the shape of our simulated trees. While these results are encouraging, suggesting that even fossils with uncertain affinities can provide useful temporal information, they also emphasize that palaeontological information cannot overturn discrepancies between model priors and the true diversification history.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138534724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Limited convergence in the postcranium of aquatic Crocodylomorpha 水生鳄鱼后颅的有限收敛

2区地球科学

Palaeontology Pub Date : 2023-11-01 DOI: 10.1111/pala.12678

Isaure Scavezzoni, Valentin Fischer

{"title":"Limited convergence in the postcranium of aquatic Crocodylomorpha","authors":"Isaure Scavezzoni, Valentin Fischer","doi":"10.1111/pala.12678","DOIUrl":"https://doi.org/10.1111/pala.12678","url":null,"abstract":"Thalattosuchia (Early Jurassic to Early Cretaceous) and Dyrosauridea (Late Cretaceous to Early Eocene) are crocodylomorph archosaurs which diversified in fluvial and marine environments and endured extinction events (i.e. Jurassic–Cretaceous boundary for Thalattosuchia; Cretaceous–Palaeogene for Dyrosauridea). Their postcrania remain globally undervalued in anatomical descriptions and diagnoses, shrouding the locomotive adaptations that possibly underpinned their radiations and longevity. We thoroughly surveyed the postcranial morphology of Dyrosauridea and Thalattosuchia, recreated their girdles in three‐dimensions using tens of high‐precisions 3D scans, and analysed their shape using geometric morphometrics. Dyrosauridea and Thalattosuchia have clearly distinct postcrania, even when found within similar environments, suggesting the existence of clade‐specific features limiting the strength of evolutionary convergence. Moreover, the range of postcranial morphologies evolved by dyrosaurids and thalattosuchians is large compared to extant crocodylians, making the latter unsatisfactory functional analogues for every group of extinct crocodylomorphs. Our work reveals the previously unsuspected potential of postcranial anatomy as an abundant source of phylogenetic and taxonomic characters to assess the relationships within Crocodylomorpha. Incorporation of postcranial anatomy therefore appears crucial to fully assess the ecology, disparity, and relationships of crocodylomorphs.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135715487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Putting the F into FBD analysis: tree constraints or morphological data? 将F放入FBD分析:树约束还是形态数据?

2区地球科学

Palaeontology Pub Date : 2023-11-01 DOI: 10.1111/pala.12679

Joëlle Barido‐Sottani, Alexander Pohle, Kenneth De Baets, Duncan Murdock, Rachel C. M. Warnock

{"title":"Putting the F into <scp>FBD</scp> analysis: tree constraints or morphological data?","authors":"Joëlle Barido‐Sottani, Alexander Pohle, Kenneth De Baets, Duncan Murdock, Rachel C. M. Warnock","doi":"10.1111/pala.12679","DOIUrl":"https://doi.org/10.1111/pala.12679","url":null,"abstract":"Abstract The fossilized birth–death (FBD) process provides an ideal model for inferring phylogenies from both extant and fossil taxa. Using this approach, fossils are directly integrated into the tree, leading to a statistically coherent prior on divergence times. Since fossils are typically not associated with molecular sequences, additional information is required to place fossils in the tree. We use simulations to evaluate two different approaches to handling fossil placement in FBD analyses: using topological constraints, where the user specifies monophyletic clades based on established taxonomy, or using total‐evidence analyses, which use a morphological data matrix in addition to the molecular alignment. We also explore how rate variation in fossil recovery or diversification rates impacts these approaches. We find that the extant topology is well recovered under all methods of fossil placement. Divergence times are similarly well recovered across all methods, with the exception of constraints which contain errors. We see similar patterns in datasets which include rate variation, however, relative errors in extant divergence times increase when more variation is included in the dataset, for all approaches using topological constraints, and particularly for constraints with errors. Finally, we show that trees recovered under the FBD model are more accurate than those estimated using non‐time calibrated inference. Overall, we show that both fossil placement approaches are reliable even when including uncertainty. Our results underscore the importance of core taxonomic research, including morphological data collection and species descriptions, irrespective of the approach to handling phylogenetic uncertainty using the FBD process.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135715161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Bridging the extant and fossil record of planktonic foraminifera: implications for the Globigerina lineage 连接浮游有孔虫的现存和化石记录:对球形虫谱系的影响

2区地球科学

Palaeontology Pub Date : 2023-11-01 DOI: 10.1111/pala.12676

Alessio Fabbrini, Mattia Greco, Francesco Iacoviello, Michal Kucera, Thomas H.G. Ezard, Bridget S. Wade

{"title":"Bridging the extant and fossil record of planktonic foraminifera: implications for the Globigerina lineage","authors":"Alessio Fabbrini, Mattia Greco, Francesco Iacoviello, Michal Kucera, Thomas H.G. Ezard, Bridget S. Wade","doi":"10.1111/pala.12676","DOIUrl":"https://doi.org/10.1111/pala.12676","url":null,"abstract":"Abstract We conducted a morphometric study and wall texture analysis on extant and fossil specimens of the planktonic foraminifera Globigerina falconensis plexus. Our global data reveal morphological inconsistencies between fossil and extant populations. Our results are significant as G. falconensis is widely used in palaeoceanographic studies in conjunction with its sister taxon G. bulloides . Morphologically these two species are similar, with the main difference being the distinctive apertural lip present in G . falconensis . We selected cores covering the entire stratigraphic range of G . falconensis , from the early Miocene to current day, spanning sites from high latitudes in the North Atlantic Ocean and the southern Indian Ocean to sites in equatorial regions. The morphology found in the modern ocean is not consistent with the Miocene holotype of Globigerina falconensis Blow described from lower Miocene sediments in Venezuela. A more lobate morphology evolved in the late Miocene, thus, a new name is required for this morphotype, coexisting in the modern oceans with G . falconensis s.s . We thus describe the new morphospecies, G . neofalconensis for the more lobate forms which evolved in the late Miocene and inhabit the modern oceans. Additionally, we report a pseudocancellate wall texture present in the G . falconensis plexus. We use the molecular sequences from the PR 2 database to explore the generic attribution of the G . falconensis lineage, confirming its close relationship with G . bulloides and its retention in the genus Globigerina .","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135564547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rise and fall of the phacopids: the morphological history of a successful trilobite family 翅虫的兴衰:一个成功的三叶虫家族的形态史

IF 2.6 2区地球科学

Palaeontology Pub Date : 2023-09-01 DOI: 10.1111/pala.12673

Valentin Bault, C. Crônier, C. Monnet, Diego Balseiro, Fernanda Serra, B. Waisfeld, Arnaud Bignon, J. Rustán

{"title":"Rise and fall of the phacopids: the morphological history of a successful trilobite family","authors":"Valentin Bault, C. Crônier, C. Monnet, Diego Balseiro, Fernanda Serra, B. Waisfeld, Arnaud Bignon, J. Rustán","doi":"10.1111/pala.12673","DOIUrl":"https://doi.org/10.1111/pala.12673","url":null,"abstract":"Phacopidae were a successful family of the Silurian–Devonian period. Although their diversity trends are well identified, their shape evolution is unknown; their morphology often considered to be conservative. We have quantified these morphologies using geometric morphometrics (landmarks) and investigated their evolution using morphological disparity indices. Results identified morphological variations between the genera, and through time. Phacopids differ from each other by the position of the facial suture linked to the size of the visual complex, the shape of the genal angle and the elongation of both cephalon and pygidium. The morphological disparity of cephala was high from the Silurian, contrary to that of pygidia. Subsequently, the morphological disparity increased in the Early Devonian with the development of narrow cephala and triangular pygidia. Morphological disparity was greater in the Emsian for both cephala and pygidia, more than 50 myr after the origination of phacopids. It constituted a perfect example illustrating that a peak of biodiversity does not necessarily happen in the early history of a clade. Subsequently, a strong decrease of morphological disparity occurred in the Middle Devonian, in conjunction with sea‐level changes and anoxic events. Taxonomic richness and morphological disparity declined strongly in the Givetian, in a non‐random extinction affecting particularly blind genera. The morphological disparity remained low in the Frasnian despite progressive eye reduction influenced by environmental changes. An extensive recovery occurred in the Famennian with an important increase of both taxonomic and morphological diversity. The Hangenberg event caused the final extinction of phacopids.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48540804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Quantifying the gastral mass in Early Cretaceous ornithuromorphs (Aves, Ornithothoraces) from the Jehol avifauna 热河鸟类早白垩世鸟翼形目(鸟翼目，鸟胸目)胃质量的定量研究

2区地球科学

Palaeontology Pub Date : 2023-09-01 DOI: 10.1111/pala.12677

Shumin Liu, Zhiheng Li, Di Liu, Jingmai K. O'Connor

{"title":"Quantifying the gastral mass in Early Cretaceous ornithuromorphs (Aves, Ornithothoraces) from the Jehol avifauna","authors":"Shumin Liu, Zhiheng Li, Di Liu, Jingmai K. O'Connor","doi":"10.1111/pala.12677","DOIUrl":"https://doi.org/10.1111/pala.12677","url":null,"abstract":"Abstract Some birds intentionally ingest stones to facilitate digestion of hard foodstuffs, a behaviour inherited from non‐avian dinosaurs and present in some of the earliest birds, as evidenced by clusters of gastroliths preserved within the abdominal cavity of a wide range of dinosaurs and Cretaceous birds. For the first time, high‐resolution computed laminographic and computed tomographic scans were used to reconstruct the gastral mass in two species of non‐neornithine ornithuromorph birds from the Lower Cretaceous Jehol Group. Four specimens of each taxon were analysed. Preservation of the gastral mass in most of these specimens is in situ and regarded as complete or nearly so. The number of gastroliths, their total volume, and their total mass relative to the estimated body mass were calculated for each specimen. The resultant gastral mass to body mass ratios fall within the range observed in extant birds, supporting previous inferences that the digestive system in non‐neornithine ornithuromorphs was comparable to that of extant taxa. Compared to available data for non‐volant non‐avian theropods, the gastral mass is proportionately smaller in birds suggesting that the evolution of flight constrained gastral mass size in the theropod lineage. Currently available data on gastral mass characteristics suggests that Iteravis ate larger food particles compared to Archaeorhynchus but cannot be used to determine diet more precisely. Better understanding of the relationship between gastral mass characteristics and food items across a broader range of extant taxa may provide an indirect but important method through which to infer diet and digestive function in archosaurs.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135735457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Taxic and morphological diversification during the early radiation of Clupeomorpha (Actinopterygii, Teleostei) 放线鸟属(Actinopterygii, Teleostei)辐射早期的分类和形态变化

2区地球科学

Palaeontology Pub Date : 2023-09-01 DOI: 10.1111/pala.12675

Edna Rodríguez‐Sánchez, Jesús Alvarado‐Ortega, Bruno A. Than‐Marchese

{"title":"Taxic and morphological diversification during the early radiation of Clupeomorpha (Actinopterygii, Teleostei)","authors":"Edna Rodríguez‐Sánchez, Jesús Alvarado‐Ortega, Bruno A. Than‐Marchese","doi":"10.1111/pala.12675","DOIUrl":"https://doi.org/10.1111/pala.12675","url":null,"abstract":"Abstract Evolutionary radiation is a problematic concept whose definition and classification have recently changed. Radiations can be defined as the pattern of abrupt increase in diversity of a lineage. It is relevant to evaluate the presence and interaction of different types of radiation in extant and fossil organisms to adequately delimitate the radiation types and to know the diversity in the context of Earth's history. Here, we employed the superorder Clupeomorpha at the Early–Late Cretaceous boundary as a study case to investigate radiation types and their interactions, using both taxic and morphological approaches. Clupeomorpha is an extensively studied, diverse and ancient teleostean superorder with wide geographical and ecological distributions. We propose a model for calculating rates of origination in order to analyse the taxic diversification and employ geometric morphometrics to analyse the morphological diversification that occurred at the temporal boundary. The results suggest the absence of taxic radiation due to a constant increase in taxon origination. However, the expansion of the phylomorphospace occupation and the disparity increase suggest the presence of a ‘climatic–geographical’ or ‘broad diversification‐like’ disparity, according to current classifications. This illustrates the incompatibility of current radiation classifications with this case study.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135691385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The dentary of hadrosauroid dinosaurs: evolution through heterochrony 鸭嘴龙类恐龙的穴居:异时进化

2区地球科学

Palaeontology Pub Date : 2023-09-01 DOI: 10.1111/pala.12674

D. Fredrik K. Söderblom, Alejandro Blanco, Albert Prieto‐Márquez, Nicolás E. Campione

{"title":"The dentary of hadrosauroid dinosaurs: evolution through heterochrony","authors":"D. Fredrik K. Söderblom, Alejandro Blanco, Albert Prieto‐Márquez, Nicolás E. Campione","doi":"10.1111/pala.12674","DOIUrl":"https://doi.org/10.1111/pala.12674","url":null,"abstract":"Abstract The near‐global distribution of hadrosaurid dinosaurs during the Cretaceous has been attributed to mastication, a behaviour commonly recognized as a mammalian adaptation. Its occurrence in a non‐mammalian lineage should be accompanied by the evolution of several morphological modifications associated with food acquisition and processing. This study investigated morphological variation in the dentary, a major element of the hadrosauroid lower jaw. Eighty‐four hadrosauroid dentaries were subjected to geometric morphometric and statistical analyses to investigate their taxonomic, ontogenetic, and individual variation. Results suggest increased food acquisition and processing efficiency in saurolophids through a complex pattern of evolutionary and growth‐related changes. The edentulous region grew longer relative to dentary length, allowing for food acquisition specialization anteriorly and processing posteriorly, and became ventrally directed, possibly associated with foraging low‐growing vegetation, especially in younger individuals. The saurolophid coronoid process became anteriorly directed and relatively more elongate, with an expanded apex, increasing moment arm length, with muscles pulling the jaw more posteriorly, increasing mechanical advantage. During growth, all hadrosauroids underwent anteroposterior dental battery elongation by the addition of teeth, and edentulous region ventralization decreased. The dental battery became deeper in saurolophids by increasing the number of teeth per tooth family. The increased coronoid process anterior inclination and relative edentulous region elongation in saurolophids are hypothesized to have evolved through hypermorphosis and/or acceleration, peramorphic heterochronic processes; the development of an anteroposteriorly shorter but dorsoventrally taller saurolophid dentary, is probably due to post‐displacement in dental battery elongation and edentulous region decreased ventral orientation, a paedomorphic heterochronic process.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135736735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The evolutionary origin of the durophagous pelagic stingray ecomorph. 鮨科黄貂鱼的进化起源。

IF 2.6 2区地球科学

Palaeontology Pub Date : 2023-07-26 eCollection Date: 2023-07-01 DOI: 10.1111/pala.12669

Giuseppe Marramà, Eduardo Villalobos-Segura, Roberto Zorzin, Jürgen Kriwet, Giorgio Carnevale

{"title":"The evolutionary origin of the durophagous pelagic stingray ecomorph.","authors":"Giuseppe Marramà, Eduardo Villalobos-Segura, Roberto Zorzin, Jürgen Kriwet, Giorgio Carnevale","doi":"10.1111/pala.12669","DOIUrl":"10.1111/pala.12669","url":null,"abstract":"Studies of the origin of evolutionary novelties (novel traits, feeding modes, behaviours, ecological niches, etc.) have considered a number of taxa experimenting with new body plans, allowing them to occupy new habitats and exploit new trophic resources. In the marine realm, colonization of pelagic environments by marine fishes occurred recurrently through time. Stingrays (Myliobatiformes) are a diverse clade of batoid fishes commonly known to possess venomous tail stings. Current hypotheses suggest that stingrays experimented with a transition from a benthic to a pelagic/benthopelagic habitat coupled with a transition from a non-durophagous diet to extreme durophagy. However, there is no study detailing macroevolutionary patterns to understand how and when habitat shift and feeding specialization arose along their evolutionary history. A new exquisitely preserved fossil stingray from the Eocene Konservat-Lagerstätte of Bolca (Italy) exhibits a unique mosaic of plesiomorphic features of the rajobenthic ecomorph, and derived traits of aquilopelagic taxa, that helps to clarify the evolutionary origin of durophagy and pelagic lifestyle in stingrays. A scenario of early evolution of the aquilopelagic ecomorph is proposed based on new data, and the possible adaptive meaning of the observed evolutionary changes is discussed. The body plan of †Dasyomyliobatis thomyorkei gen. et sp. nov. is intermediate between the rajobenthic and more derived aquilopelagic stingrays, supporting its stem phylogenetic position and the hypothesis that the aquilopelagic body plan arose in association with the evolution of durophagy and pelagic lifestyle from a benthic, soft-prey feeder ancestor.","PeriodicalId":56272,"journal":{"name":"Palaeontology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7614867/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10307918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0