Paleobiology最新文献_第4页

The egg-thief architect: experimental oviraptorosaur nesting physiology, the possibility of adult-mediated incubation, and the feasibility of indirect contact incubation 盗蛋建筑师:实验窃蛋龙筑巢生理，成虫介导孵化的可能性，以及间接接触孵化的可行性

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-08-11 DOI: 10.1017/pab.2023.19

Jason D. Hogan

{"title":"The egg-thief architect: experimental oviraptorosaur nesting physiology, the possibility of adult-mediated incubation, and the feasibility of indirect contact incubation","authors":"Jason D. Hogan","doi":"10.1017/pab.2023.19","DOIUrl":"https://doi.org/10.1017/pab.2023.19","url":null,"abstract":"\u0000 Numerous, high-quality reproduction-related oviraptorosaur fossils have been described. However, oviraptorosaur-style nests are unknown among extant animals, and their curious construction makes nesting behavior difficult to interpret. Experiments were undertaken to better understand oviraptorosaur nesting strategies. A surrogate was constructed and placed atop mock-oviraptorosaur nests built from sand and 36 infertile emu eggs (as Macroolithus approximations) arranged according to the most current nest reconstructions. Thermometers, placed within each egg and throughout the experimental area, recorded energy flow from the surrogate dinosaur into the nesting microenvironment. One experiment examined a basic open nest warmed from above; the second, a fully buried clutch warmed from above; and the third, a nest open like the first but with heating elements (representing hindlimbs) extending down into the nest. It was found that egg temperatures in each scenario surpassed ambient temperatures without requiring excessive energy input. Final clutch temperatures were below most avian values, closer to crocodilian incubation, but are likely conservative, considering experimental parameters. These results may support the idea that an oviraptorosaur could use adult-generated energy to warm a clutch above ambient conditions. Additionally, egg tiers would be warmer and more uniform in temperature if heated by elements within the nest, such as hindlimbs, instead of solely from above. Results from the second experiment indicate that an endothermic adult could possibly warm a clutch fully buried beneath itself despite a barrier. Although not likely a behavior exhibited by oviraptorosaurs, such results suggest an important evolutionary step bridging guarded subterranean eggs and contact-incubated subaerial eggs.","PeriodicalId":54646,"journal":{"name":"Paleobiology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48788810","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

A quantitative assessment of ontogeny and molting in a Cambrian radiodont and the evolution of arthropod development 寒武纪放射虫个体发生和蜕皮的定量评估及节肢动物发育的进化

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-08-11 DOI: 10.1017/pab.2023.18

J. Moysiuk, Jean‐Bernard Caron

{"title":"A quantitative assessment of ontogeny and molting in a Cambrian radiodont and the evolution of arthropod development","authors":"J. Moysiuk, Jean‐Bernard Caron","doi":"10.1017/pab.2023.18","DOIUrl":"https://doi.org/10.1017/pab.2023.18","url":null,"abstract":"\u0000 Radiodonta is a clade of stem euarthropods of central importance to our understanding of the evolution of this phylum. Radiodonts include some of the largest early Paleozoic animals; however, little is known about their ontogeny. We present an analysis of molting patterns and ontogeny in the radiodont Stanleycaris based on 265 exceptionally preserved specimens from the mid-Cambrian (Wuliuan) Burgess Shale. Ranging in size from 10 to 83 mm, they constitute the most extensive radiodont ontogenetic series known. Using a novel morphospace approach, we show that putative carcasses and exuviae can be quantitatively distinguished by the particular suites of structures preserved and their modes of preservation. We propose that Stanleycaris, and probably other radiodonts, molted via a suture near the anterior of the trunk. Similar anterior molting strategies, with a suture located at the head–trunk boundary, are shared with some Cambrian euarthropods and are potentially ancestral. Allometric analyses suggest that as Stanleycaris body size increased, the head sclerite and neck became relatively broader, while the trunk and flaps became slightly longer. The eyes developed precociously, indicating an important role of visual processing in juveniles. Finally, we find evidence for an initial anamorphic developmental phase, where segment number increased at least from 11 or 12 up to 17, followed by an epimorphic phase, in which growth continued without segment addition. This is consistent with the hypothesis that finite postembryonic segment addition (hemianamorphosis) is ancestral for arthropods and refines the timing of the origin of this important developmental mode.","PeriodicalId":54646,"journal":{"name":"Paleobiology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45455287","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

James Valentine (20 November 1926–7 April 2023), co-founder of Paleobiology and master of idiographically informed nomothetism 詹姆斯·瓦伦丁(James Valentine, 1926年11月20日- 2023年4月7日)，古生物学联合创始人，无神论大师

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-08-04 DOI: 10.1017/pab.2023.21

C. Marshall

引用次数: 0

Challenges and directions in analytical paleobiology. 分析古生物学的挑战和方向。

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-08-01 Epub Date: 2023-02-27 DOI: 10.1017/pab.2023.3

Erin M Dillon, Emma M Dunne, Tom M Womack, Miranta Kouvari, Ekaterina Larina, Jordan Ray Claytor, Angelina Ivkić, Mark Juhn, Pablo S Milla Carmona, Selina Viktor Robson, Anwesha Saha, Jaime A Villafaña, Michelle E Zill

{"title":"Challenges and directions in analytical paleobiology.","authors":"Erin M Dillon, Emma M Dunne, Tom M Womack, Miranta Kouvari, Ekaterina Larina, Jordan Ray Claytor, Angelina Ivkić, Mark Juhn, Pablo S Milla Carmona, Selina Viktor Robson, Anwesha Saha, Jaime A Villafaña, Michelle E Zill","doi":"10.1017/pab.2023.3","DOIUrl":"10.1017/pab.2023.3","url":null,"abstract":"<p><p>Over the last 50 years, access to new data and analytical tools has expanded the study of analytical paleobiology, contributing to innovative analyses of biodiversity dynamics over Earth's history. Despite-or even spurred by-this growing availability of resources, analytical paleobiology faces deep-rooted obstacles that stem from the need for more equitable access to data and best practices to guide analyses of the fossil record. Recent progress has been accelerated by a collective push toward more collaborative, interdisciplinary, and open science, especially by early-career researchers. Here, we survey four challenges facing analytical paleobiology from an early-career perspective: (1) accounting for biases when interpreting the fossil record; (2) integrating fossil and modern biodiversity data; (3) building data science skills; and (4) increasing data accessibility and equity. We discuss recent efforts to address each challenge, highlight persisting barriers, and identify tools that have advanced analytical work. Given the inherent linkages between these challenges, we encourage discourse across disciplines to find common solutions. We also affirm the need for systemic changes that reevaluate how we conduct and share paleobiological research.</p>","PeriodicalId":54646,"journal":{"name":"Paleobiology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7615171/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41150021","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: 5

PAB volume 49 issue 3 Cover PAB第49卷第3期封面

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-08-01 DOI: 10.1017/pab.2023.25

引用次数: 0

Relative oversampling of carbonate rocks in the North American marine fossil record 北美海相化石记录中碳酸盐岩的相对过采样

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-05-29 DOI: 10.1017/pab.2023.16

Diego Balseiro, M. Powell

{"title":"Relative oversampling of carbonate rocks in the North American marine fossil record","authors":"Diego Balseiro, M. Powell","doi":"10.1017/pab.2023.16","DOIUrl":"https://doi.org/10.1017/pab.2023.16","url":null,"abstract":"\u0000 Paleontologists have long stressed the need to know how sampling the fossil record might influence our knowledge of the evolution of life. Here, we combine fossil occurrences of North American marine invertebrates from the Paleobiology Database with lithologic data from Macrostrat to identify sampling patterns in carbonate and siliciclastic rocks. We aim to quantify temporal trends in sampling effort within and between lithologies, focusing on the proportion of total available volume that has been sampled (sampled fossiliferous proportion, here called κ). Results indicate that the sampled fossiliferous proportion was stable during the Paleozoic, and variable during the post-Paleozoic, but showed no systematic increase through time. Fossiliferous carbonate rocks are proportionally more sampled than siliciclastic rocks, with intervals where the carbonate κ is double the siliciclastic κ. Among possible explanations for the apparent oversampling of fossiliferous carbonate rocks, analyses suggest that barren units, taphonomic dissolution, or data entry errors cannot completely explain sampling patterns. Our results suggest that one of the important drivers might be that paleontologists publish taxonomic descriptions from carbonate rocks more frequently. The higher diversity in carbonate rocks might account for an ease in the description of unknown species and therefore a higher rate of published fossils. Finally, a strong effect in favor of carbonate rocks might distort our perception of diversity through time, even under commonly used standardization methods. Our results also confirm that previous descriptions of an increase in the proportion of sampled fossiliferous rocks over time were driven by the sampling of the nonmarine fossil record.","PeriodicalId":54646,"journal":{"name":"Paleobiology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44515472","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

Is the hyoid a constraint on innovation? A study in convergence driving feeding in fish-shaped marine tetrapods – CORRIGENDUM 舌骨是创新的约束吗?鱼类海洋四足动物收敛性驱动摄食的研究-勘误

2区地球科学

Paleobiology Pub Date : 2023-05-18 DOI: 10.1017/pab.2023.17

Lene Liebe Delsett, Nicholas Pyenson, Feiko Miedema, Øyvind Hammer

引用次数: 0

Sediment-encased pressure–temperature maturation experiments elucidate the impact of diagenesis on melanin-based fossil color and its paleobiological implications 沉积包裹的压力-温度成熟实验阐明了成岩作用对以黑色素为基础的化石颜色的影响及其古生物学意义

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-05-08 DOI: 10.1017/pab.2023.11

Arindam Roy, M. Pittman, Thomas G. Kaye, E. Saitta

{"title":"Sediment-encased pressure–temperature maturation experiments elucidate the impact of diagenesis on melanin-based fossil color and its paleobiological implications","authors":"Arindam Roy, M. Pittman, Thomas G. Kaye, E. Saitta","doi":"10.1017/pab.2023.11","DOIUrl":"https://doi.org/10.1017/pab.2023.11","url":null,"abstract":"\u0000 Melanin pigments are central to colors and patterns in modern vertebrate integuments, which inform upon ecological and behavioral strategies like crypsis, aposematism, and sociosexual selection. Over the last decade, melanin has emerged as a valuable tool for predicting color in exceptionally preserved fossil feathers and subsequent testing of paleobiological hypotheses in long-extinct dinosaurs and birds. Yet much remains to be learned about melanin stability, diagenetic alterations to melanin chemistry, and their implications for “paleocolor reconstruction.” Pressure–temperature maturation experiments with modern feathers offer a way to examine these topics but have mostly been conducted in closed-system capsules or open-system aluminum foil. Both methods have operational limitations and do not consider the filtering effect of porous sediment matrices on thermally labile chemical groups versus stable ones during natural fossilization. We use sediment-encased maturation to resolve this issue and demonstrate replication of organic preservation of melanin highly comparable to compression fossils. Our experiments, coupled with time-of-flight secondary ion mass spectrometry, show predictable volatilization of N/S-bearing molecules and increased melanin cross-linking with elevated temperatures. We also suggest that eumelanin is more stable compared with pheomelanin at higher temperatures, explaining why eumelanic colors (black, dark brown, iridescent) are better preserved in fossils than pheomelanic ones (reddish brown). Furthermore, we propose that proteins preferentially undergo hydrolysis more so than forming N-heterocycles in selectively open systems analogous to natural matrices. Thus, we conclude that melanin pigments and not diagenetically altered protein remnants are the key players in promoting fossilization of soft tissues like feathers.","PeriodicalId":54646,"journal":{"name":"Paleobiology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42481830","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

Blood flow rates to leg bones of extinct birds indicate high levels of cursorial locomotion 已灭绝鸟类腿骨的血流速度表明其粗略运动水平很高

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-05-02 DOI: 10.1017/pab.2023.14

Qiaohui Hu, C. V. Miller, E. Snelling, R. Seymour

{"title":"Blood flow rates to leg bones of extinct birds indicate high levels of cursorial locomotion","authors":"Qiaohui Hu, C. V. Miller, E. Snelling, R. Seymour","doi":"10.1017/pab.2023.14","DOIUrl":"https://doi.org/10.1017/pab.2023.14","url":null,"abstract":"Abstract Foramina of bones are beginning to yield more information about metabolic rates and activity levels of living and extinct species. This study investigates the relationship between estimated blood flow rate to the femur and body mass among cursorial birds extending back to the Late Cretaceous. Data from fossil foramina are compared with those of extant species, revealing similar scaling relationships for all cursorial birds and supporting crown bird–like terrestrial locomotor activity. Because the perfusion rate in long bones of birds is related to the metabolic cost of microfracture repair due to stresses applied during locomotion, as it is in mammals, this study estimates absolute blood flow rates from sizes of nutrient foramina located on the femur shafts. After differences in body mass and locomotor behaviors are accounted for, femoral bone blood flow rates in extinct species are similar to those of extant cursorial birds. Femoral robustness is generally greater in aquatic flightless birds than in terrestrial flightless and ground-dwelling flighted birds, suggesting that the morphology is shaped by life-history demands. Femoral robustness also increases in larger cursorial bird taxa, probably associated with their weight redistribution following evolutionary loss of the tail, which purportedly constrains femur length, aligns it more horizontally, and necessitates increased robustness in larger species.","PeriodicalId":54646,"journal":{"name":"Paleobiology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44950396","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

Linking host plants to damage types in the fossil record of insect herbivory – CORRIGENDUM 将寄主植物与食草昆虫化石记录中的损害类型联系起来-勘误表

IF 2.7 2区地球科学

Paleobiology Pub Date : 2023-05-01 DOI: 10.1017/pab.2023.15

Sandra R. Schachat, J. Payne, C. Boyce

引用次数: 0