Paleontological Research最新文献

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Tarsals of Early Pinnipedimorphs (Mammalia: Carnivora) from the Lower Miocene, Japan, and Their Early Diversity in the Western North Pacific 日本下中新世早期鳍足类动物(哺乳动物:食肉目)的Tarsals及其在北太平洋西部的早期多样性
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-07-01 DOI: 10.2517/PR200030
Wataru Tonomori, H. Taru
{"title":"Tarsals of Early Pinnipedimorphs (Mammalia: Carnivora) from the Lower Miocene, Japan, and Their Early Diversity in the Western North Pacific","authors":"Wataru Tonomori, H. Taru","doi":"10.2517/PR200030","DOIUrl":"https://doi.org/10.2517/PR200030","url":null,"abstract":"Abstract. New tarsals (astragalus and entocuneiform) of fossil pinnipeds from the lower Miocene (Burdigalian) Oi Formation in Mie Prefecture, Japan, belonging to early pinnipedimorphs (i.e., enaliarctines or basal odobenids) and cf. Odobenidae gen. et sp. indet. were discovered. A comparison of early pinnipedimorph astragali conclusively indicated that at least three species were represented in the western North Pacific during the early Miocene (Burdigalian). Early pinnipedimorphs clearly showed considerable diversification in the eastern North Pacific during the early Miocene, and our study demonstrates that the early pinnipedimorphs in the western North Pacific also started to diversify around the same time.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"26 1","pages":"314 - 326"},"PeriodicalIF":0.9,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49455644","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
Fossil Benthic Foraminifera in the Nakdong River Delta (Southeast Korea) during the Early to Middle Holocene 全新世早期至中期洛东江三角洲底栖有孔虫化石
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-07-01 DOI: 10.2517/PR200037
H. Takata, Seok-Hwi Hong, D. Yoo, Jin-Cheul Kim, D. Cheong, B. Khim
{"title":"Fossil Benthic Foraminifera in the Nakdong River Delta (Southeast Korea) during the Early to Middle Holocene","authors":"H. Takata, Seok-Hwi Hong, D. Yoo, Jin-Cheul Kim, D. Cheong, B. Khim","doi":"10.2517/PR200037","DOIUrl":"https://doi.org/10.2517/PR200037","url":null,"abstract":"Abstract. We investigated early to middle Holocene benthic foraminifera from four borehole cores in the Nakdong River Delta (southeast Korea) to document faunal associations and the transition of benthic foraminifera in coastal areas along the Tsushima Warm Current. We recognized four varimax factor assemblages. The varimax factor 1 assemblage (characterized by Pseudoparrella naraensis with Eilohedra nipponica) is common throughout core ND-02, which is seaward in the delta, whereas the varimax factor 2 assemblage (characterized by Haynesina sp. A) is dominated by low evenness in core 16ND-C02, which is landward in the delta. The varimax factor 4 assemblage (characterized by Buccella frigida) is generally common at the bottom and/or top part of the studied cores, whereas the varimax factor 3 assemblage (characterized by Elphidium somaense) tends to be common in the upper part of the three cores in the delta's seaward area. Both the contrasting high diversity and low diversity with low evenness of benthic foraminifera (varimax factor 1 and 2 assemblages, respectively) were present between the seaward and landward portions of the delta during the same period (∼7–6 ka), respectively. The combination of these contrasting faunas tended to appear in the delta with the intensification of the Tsushima Warm Current during ∼8–6 ka in addition to the sea-level rise. Common taxa in the Nakdong River Delta are largely neritic species of the temperate region in the East Asian margin, whereas some upper bathyal species, such as Angulogerina ikebei, Bolivina decussata, and E. nipponica, were subordinated in the delta's seaward portion. Such faunal features in the Nakdong River Delta are distinguishable from other coastal areas in the Japanese Islands.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"26 1","pages":"283 - 300"},"PeriodicalIF":0.9,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45338226","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 Cretaceous Dimorphic Scaphitid Ammonoid Genus Yezoites from the Circum-North Pacific Regions 环北太平洋地区晚白垩世二形舟形菊石属叶子岩
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-07-01 DOI: 10.2517/PR200049
K. Tanabe
{"title":"Late Cretaceous Dimorphic Scaphitid Ammonoid Genus Yezoites from the Circum-North Pacific Regions","authors":"K. Tanabe","doi":"10.2517/PR200049","DOIUrl":"https://doi.org/10.2517/PR200049","url":null,"abstract":"Abstract. Yezoites is a Late Cretaceous (Cenomanian–Campanian) small to very small dimorphic ammonoid genus belonging to the Scaphitidae, whose microconchs have a pair of long lateral lappets at the aperture. Based on examination of previously described material including type and figured specimens and newly recovered ones, five species of Yezoites are described herein from the circum-North Pacific regions (Japan, Sakhalin, Kamchatka, Alaska, Oregon, and California); i.e., Y. perrini (Anderson), Y. seabeensis (Cobban and Gryc), and Y. puerculus (Jimbo) from the Turonian, and Y. pseudoaequalis (Yabe) and Y. matsumotoi (Tanabe) from the Coniacian. Of these species, both microconchs and macroconchs are recognized in Y. puerculus and Y. pseudoaequalis, whereas only microconchs are known in the other three species. These Yezoites species characteristically occur in very fine-grained sandstone to silty mudstone facies suggesting an intermediate between nearshore and offshore environments, and can be used supplementarily for biozonation and correlation of the Turonian and Coniacian deposits in the North Pacific regions.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"26 1","pages":"233 - 269"},"PeriodicalIF":0.9,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46957964","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
A Sidneyia-Like Euarthropod from the Guanshan Biota (Cambrian Series 2, Stage 4), Eastern Yunnan, Southwest China 滇东关山生物群中一种似悉尼虫的真节肢动物(寒武纪2系4期)
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-07-01 DOI: 10.2517/PR200047
Jun Zhao, Yu-jing Li, P. Selden, Pei-yun Cong, Zhixin Yang
{"title":"A Sidneyia-Like Euarthropod from the Guanshan Biota (Cambrian Series 2, Stage 4), Eastern Yunnan, Southwest China","authors":"Jun Zhao, Yu-jing Li, P. Selden, Pei-yun Cong, Zhixin Yang","doi":"10.2517/PR200047","DOIUrl":"https://doi.org/10.2517/PR200047","url":null,"abstract":"Abstract. Sidneyia inexpectans was first excavated in Laurentia, and since then Sidneyia and Sidneyia-like euarthropods have been reported from different continents. Here we describe a new Sidneyia-like euarthropod from the Guanshan biota and, its preserved dorsal exoskeleton and appendages resemble those of S. inexpectans. The discovery in the Guanshan biota provides a new data point of Sidneyia-like euarthropod in Cambrian Stage 4 and a second occurrence on the South China plate.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"26 1","pages":"327 - 335"},"PeriodicalIF":0.9,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44318278","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
Pterophyllum pachyrachis (Bennettitales) from the Upper Jurassic to Lower Cretaceous Tetori Group, Fukui Prefecture, Central Japan 日本中部福井县上侏罗统至下白垩统Tetori群的pachyrachis蕨类
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-04-01 DOI: 10.2517/pr200023
T. Yamada, M. Nishino
{"title":"Pterophyllum pachyrachis (Bennettitales) from the Upper Jurassic to Lower Cretaceous Tetori Group, Fukui Prefecture, Central Japan","authors":"T. Yamada, M. Nishino","doi":"10.2517/pr200023","DOIUrl":"https://doi.org/10.2517/pr200023","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48280029","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
Tropical Radiolarian Biostratigraphy from the Early to Late Miocene at ODP Site 714 in the Tropical Indian Ocean 热带印度洋ODP遗址714早至晚中新世热带放射虫生物地层
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-04-01 DOI: 10.2517/pr200017
S. Kamikuri
{"title":"Tropical Radiolarian Biostratigraphy from the Early to Late Miocene at ODP Site 714 in the Tropical Indian Ocean","authors":"S. Kamikuri","doi":"10.2517/pr200017","DOIUrl":"https://doi.org/10.2517/pr200017","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44878158","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
Kimuriella gen. nov. (Bennettitales), a Whole-Plant Bennettite from the Oxfordian (Upper Jurassic) Tochikubo Formation of Shidazawa, Minamisōma, Fukushima Prefecture, Northeast Japan Kimuriella gen. 11 . (Bennettitales),一种来自日本东北部福岛县Shidazawa的牛津(上侏罗统)Tochikubo组的全植物bennetite
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-04-01 DOI: 10.2517/pr200020
C. Pott, H. Takimoto
{"title":"Kimuriella gen. nov. (Bennettitales), a Whole-Plant Bennettite from the Oxfordian (Upper Jurassic) Tochikubo Formation of Shidazawa, Minamisōma, Fukushima Prefecture, Northeast Japan","authors":"C. Pott, H. Takimoto","doi":"10.2517/pr200020","DOIUrl":"https://doi.org/10.2517/pr200020","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"13 6","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41264200","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
Latest Olenekian (Early Triassic) Ammonoids from the Uppermost Part of the Osawa Formation (Inai Group) in the South Kitakami Belt, Northeast Japan 日本东北北上南带大泽组上段(稻井群)最新奥连纪(早三叠世)菊石
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-04-01 DOI: 10.2517/pr200027
M. Ehiro
{"title":"Latest Olenekian (Early Triassic) Ammonoids from the Uppermost Part of the Osawa Formation (Inai Group) in the South Kitakami Belt, Northeast Japan","authors":"M. Ehiro","doi":"10.2517/pr200027","DOIUrl":"https://doi.org/10.2517/pr200027","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44093494","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
Tohokubelus gen. nov., the Oldest Belemnite from the Olenekian (Lower Triassic) of Northeast Japan Tohokubelus gen. nov.,日本东北部奥连基纪(下三叠世)最古老的belennite
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-04-01 DOI: 10.2517/pr200036
S. Niko, M. Ehiro
{"title":"Tohokubelus gen. nov., the Oldest Belemnite from the Olenekian (Lower Triassic) of Northeast Japan","authors":"S. Niko, M. Ehiro","doi":"10.2517/pr200036","DOIUrl":"https://doi.org/10.2517/pr200036","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49063270","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: 4
Fossil Lateral Arm Plates of Stegophiura sladeni (Echinodermata: Ophiuroidea: Ophiurida) from the Middle Pleistocene of Japan 日本更新世中期蛇床虫的侧臂板化石
IF 0.9 4区 地球科学
Paleontological Research Pub Date : 2022-04-01 DOI: 10.2517/pr200039
M. Okanishi, Shota Mitsui, B. Thuy
{"title":"Fossil Lateral Arm Plates of Stegophiura sladeni (Echinodermata: Ophiuroidea: Ophiurida) from the Middle Pleistocene of Japan","authors":"M. Okanishi, Shota Mitsui, B. Thuy","doi":"10.2517/pr200039","DOIUrl":"https://doi.org/10.2517/pr200039","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48058522","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
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