Journal of Paleontology最新文献_第3页

Middle Visean (Mississippian) conodonts from shallow-water deposits in the Yashui section, Guizhou, South China, and their stratigraphic significance 贵州雅水剖面浅水沉积中维桑(密西西比)牙形刺及其地层学意义

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-08-31 DOI: 10.1017/jpa.2023.44

Qiulai Wang, Yu-Ping Qi, Le Yao

引用次数: 0

Catalogue of fossil genera of Mactridae (Mollusca: Bivalvia) Mactridae化石属目录（软体动物：双壳纲）

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-07-31 DOI: 10.1017/jpa.2023.32

J. Signorelli

引用次数: 0

A new Cambrian (Jiangshanian, Sunwaptan) trilobite fauna from Oklahoma and its biostratigraphic significance. 俄克拉何马州寒武纪江山期三叶虫新动物群及其生物地层意义。

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-07-13 DOI: 10.1017/jpa.2023.40

Sean R. Blackwell, S. Westrop

引用次数: 0

Crocodylian princess in Taiwan: Revising the taxonomic status of Tomistoma taiwanicus from the Pleistocene of Taiwan and its paleobiogeographic implications 台湾鳄鱼公主：台湾更新世台湾Tomistoma taiwanicus分类地位及其古生物地理学意义

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-06-29 DOI: 10.1017/jpa.2023.36

Yi-Yang Cho, Cheng‐Hsiu Tsai

{"title":"Crocodylian princess in Taiwan: Revising the taxonomic status of Tomistoma taiwanicus from the Pleistocene of Taiwan and its paleobiogeographic implications","authors":"Yi-Yang Cho, Cheng‐Hsiu Tsai","doi":"10.1017/jpa.2023.36","DOIUrl":"https://doi.org/10.1017/jpa.2023.36","url":null,"abstract":"\u0000 Toyotamaphimeia is an extinct crocodylian lineage whose name is derived from a mythological Japanese princess. Here, we re-examine the type specimens of a long-forgotten species: Tomistoma taiwanicus from the Pleistocene of Tainan (Taiwan) and revise its taxonomic status to Toyotamaphimeia taiwanicus n. comb., leading to the first recognized species of Toyotamaphimeia outside Japan. Our phylogenetic analyses also support this taxonomic assignment and, more interestingly, further suggest an East Asian lineage. In addition, Toyotamaphimeia taiwanicus n. comb. represents a tropical species, resolving a long-standing puzzle of why Toyotamaphimeia only inhabited a much higher latitudinal area (Japan). Given the large body size of Toyotamaphimeia taiwanicus n. comb. (~7 m) and the fact that it is geologically older than Toyotamaphimeia machikanensis from Japan, we propose a novel evolutionary scenario: the genus Toyotamaphimeia originated in Taiwan and evolved to a large body size with gigantothermic physiology, which resulted in migration out of Taiwan and dispersal farther north to Japan. Our taxonomic identification shows the presence of an extinct endemic crocodylian species from the Pleistocene of Taiwan with large-scale paleogeographic implications. This study, with our recent progress in vertebrate paleontology in Taiwan, should provoke more in-depth paleontological research on the Pleistocene extinction.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42508097","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}

引用次数: 0

Late Cambrian Pywackia is a cnidarian, not a bryozoan: Insights from skeletal microstructure 寒武纪晚期Pywackia是一种刺胞动物，而不是苔藓虫:来自骨骼微观结构的见解

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-06-22 DOI: 10.1017/jpa.2023.35

S. Hageman, O. Vinn

{"title":"Late Cambrian Pywackia is a cnidarian, not a bryozoan: Insights from skeletal microstructure","authors":"S. Hageman, O. Vinn","doi":"10.1017/jpa.2023.35","DOIUrl":"https://doi.org/10.1017/jpa.2023.35","url":null,"abstract":"\u0000 The phylum Bryozoa had long been the only major phylum unknown from the Cambrian and by inference the Cambrian Explosion of biodiversity. When described in 2010 as a late Cambrian cryptostome bryozoan, Pywackia baileyi Landing in Landing et al., 2010 became the oldest known bryozoan (early Cambrian bryozoans have since been described). Controversy remains about the phylum-level identification of Pywackia Landing in Landing et al., 2010—one study proposed an interpretation of Pywackia as an octocoral. No previous studies of the skeletal microstructure of Pywackia have employed the analysis of petrographic thin sections and high-magnification scanning electron microscopy. These two methods, with the addition of data from previous studies, are employed in this analysis of skeletal microstructure, a feature often important for higher-level taxonomic identification. Although many candidate groups were considered, Pywackia's distinctive pillar and laminae, porous skeleton like many Cnidaria, topology of the body walls, and growth of modules are consistent with a cnidarian affinity. Pywackia skeletons with primary microstructure were 100% phosphate mineral and were collected from a setting of pervasive phosphatic replacement, which leaves uncertainty as to the original skeletal composition. Pywackia is not assigned here to a cnidarian class and likely represents an early, rare, short-lived cnidarian evolutionary group.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44325684","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}

引用次数: 1

Morphology, variation, and systematics of the late Cambrian Laurentian dikelocephalid trilobite Walcottaspis vanhornei (Walcott, 1914) 晚寒武纪劳伦世双头三叶虫Walcottaspis vanhornei的形态、变异和分类学(Walcott, 1914)

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-06-13 DOI: 10.1017/jpa.2023.29

Shravya Srivastava, N. Hughes

{"title":"Morphology, variation, and systematics of the late Cambrian Laurentian dikelocephalid trilobite Walcottaspis vanhornei (Walcott, 1914)","authors":"Shravya Srivastava, N. Hughes","doi":"10.1017/jpa.2023.29","DOIUrl":"https://doi.org/10.1017/jpa.2023.29","url":null,"abstract":"\u0000 Walcottaspis vanhornei (Walcott, 1914) is a large, late Cambrian trilobite with a unique pygidial morphology known only from a narrow outcrop belt of the St. Lawrence Formation in the Upper Mississippi Valley. Found in carbonate-rich layers within heterolithic facies that represent the toesets of a prograding shoreface, it is restricted to a single or small number of parasequences. Only four specimens of any of its sclerites have been illustrated previously. Here holaspid examples of all its biomineralized sclerites are described and illustrated, along with a morphometric analysis of cranidial landmarks and landmarks plus semilandmarks for the pygidium. Ontogenetic allometry accounts for 29% of the variance among holaspid cranidia and includes a relative shortening and narrowing of the palpebral lobe and a reduction in the relative length and width of the frontal area. Notable pygidial phenotypic variation occurs in the extent of the postaxial region and in the proportion of the structure occupied by the axis. Phylogenetic analysis suggests that W. vanhornei is sister taxon to Dikelocephalus minnesotensis Owen, 1852, which also occurs in the St. Lawrence Formation and has a broadly similar cephalon but distinctive trunk. The holaspid pygidium of W. vanhornei is uniquely characterized by the interpleural furrows of the first two segments becoming abruptly obsolete on approaching the axial furrow. Some pygidia show narrow, shallow, flat-bottomed grooves etched into the internal sides of the dorsal surface or doublure that apparently represent infestation of the live trilobite.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49267899","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}

引用次数: 1

Crinoid calyx origin from stem radial echinoderms – CORRIGENDUM 海百合花萼起源于茎放射状棘皮。勘误

4区地球科学

Journal of Paleontology Pub Date : 2023-06-06 DOI: 10.1017/jpa.2023.38

Thomas E. Guensburg, Rich Mooi, Nicolás Mongiardino Koch

引用次数: 0

Revision of Jurassic Protobranch Bivalves from Gebel Maghara, northern Sinai, Egypt 埃及西奈半岛北部Gebel Maghara侏罗系原支双壳虫的订正

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-06-01 DOI: 10.1017/jpa.2022.107

Wagih S. Ayoub-Hannaa, F. Fürsich, A. Abdelhady

{"title":"Revision of Jurassic Protobranch Bivalves from Gebel Maghara, northern Sinai, Egypt","authors":"Wagih S. Ayoub-Hannaa, F. Fürsich, A. Abdelhady","doi":"10.1017/jpa.2022.107","DOIUrl":"https://doi.org/10.1017/jpa.2022.107","url":null,"abstract":"Abstract. The Jurassic rocks of Gebel Maghara, northern Sinai, Egypt, contain a well-preserved and highly diverse macrobenthic fauna, dominated by bivalves. This fauna, particularly bivalves and gastropods, have received little attention in the last 100 years. In an attempt to provide a sound database on the marine bivalve diversity of Egypt during the Jurassic period, a first faunal group, the protobranch bivalves, is reviewed in detail. Sixteen taxa (three of them new), belonging to two orders, five families, and nine genera are systematically described and compared to closely related Jurassic taxa from various locations, particularly in Europe and India. New species are Nuculoma douvillei n. sp., N. sinaiensis n. sp., and Palaeoneilo aegyptiaca n. sp. In addition, Palaeonucula cuneiformis (J. de C. Sowerby), P. muensteri (Goldfuss), Dacryomya diana (d'Orbigny), D. lacryma (J. de. C. Sowerby), and Praesaccella juriana Cox are identified from Jurassic strata of Egypt for the first time. The younger records of the genus Palaeoneilo have not been accepted by some researchers, since almost all exhibit only limited features. The genus occurs with certainty in the Middle Jurassic (Bajocian–Bathonian) rocks of Egypt, based on well-preserved external and internal characters. Similarly, Dacryomya and Ryderia from Bathonian–Kimmeridgian rocks of Egypt are younger than previously recorded from other parts of the world. The identified genera have wide geographic ranges and have been reported from different faunal provinces, which suggests that latitudinal climate differences did not influence their distribution pattern to a great extent.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"1 - 45"},"PeriodicalIF":1.4,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47077110","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}

引用次数: 0

JPA volume 97 S93 Cover and Front matter JPA卷97 S93封面和封面问题

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-06-01 DOI: 10.1017/jpa.2023.39

引用次数: 0

New soft-bodied panarthropods from diverse Spence Shale (Cambrian; Miaolingian; Wuliuan) depositional environments 寒武纪斯宾塞页岩新软体全节肢动物;Miaolingian;五流)沉积环境

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-05-31 DOI: 10.1017/jpa.2023.24

J. Kimmig, S. Pates, Rhiannon J. LaVine, L. Krumenacker, A. Whitaker, L. Strotz, Paul G. Jamison, V. G. Gunther, Glade Gunther, M. Witte, A. Daley, B. Lieberman

{"title":"New soft-bodied panarthropods from diverse Spence Shale (Cambrian; Miaolingian; Wuliuan) depositional environments","authors":"J. Kimmig, S. Pates, Rhiannon J. LaVine, L. Krumenacker, A. Whitaker, L. Strotz, Paul G. Jamison, V. G. Gunther, Glade Gunther, M. Witte, A. Daley, B. Lieberman","doi":"10.1017/jpa.2023.24","DOIUrl":"https://doi.org/10.1017/jpa.2023.24","url":null,"abstract":"\u0000 The Cambrian (Miaolingian; Wuliuan) Spence Shale Lagerstätte of northern Utah and southern Idaho is one of the most diverse Burgess Shale-type deposits of Laurentia. It yields a diverse fauna consisting of abundant biomineralized and locally abundant soft-bodied fossils, along a range of environments from shallow-water carbonates to deep-shelf dark shales. Panarthropods are the dominant component throughout the deposit, both in time and space, but whereas the trilobites and agnostoids are abundant, most of the soft-bodied taxa are only known from very few specimens. Additionally, the knowledge of soft-bodied panarthropods is currently largely limited to locations in the Wellsville Mountains of northeastern Utah. This contribution describes 21 new soft-bodied panarthropods from six locations, including the first occurrences of soft-bodied panarthropods in the High-Creek, Smithfield Creek, Spence Gulch, and Two-Mile Canyon localities. Additionally, we report the presence of bradoriids— i.e., Branchiocaris pretiosa Resser, 1929, Perspicaris? dilatus Robison and Richards, 1981, Naraoia? sp. indet., Thelxiope cf. T. palaeothalassia Simonetta and Delle Cave, 1975, and Tuzoia guntheri Robison and Richards, 1981—for the first time from the Spence Shale Lagerstätte; the first reported occurrence outside of the Burgess Shale for Thelxiope cf. T. palaeothalassia; and the first Wuliuan occurrence of Tuzoia guntheri. We also report on a new hurdiid carapace element and additional specimens of Buccaspinea cooperi? Pates et al., 2021, Dioxycaris argenta Walcott, 1886, Hurdia sp. indet., and Tuzoia retifera Walcott, 1912. This new material improves our understanding of the panarthropod fauna of the Spence Shale Lagerstätte and substantially increases our understanding of the distribution of the described taxa in time and space.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44284399","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}

引用次数: 2