Paleontological Research最新文献_第2页

A New Asteroid (Echinodermata, Astropectinidae) and Ophiuroid (Echinodermata, Hemieuryalidae) from the Mid-Cretaceous of Southern Japan 日本南部中白垩世一颗新小行星(棘皮科)和蛇尿类(棘皮科)

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-05-22 DOI: 10.2517/pr220020

A. Gale, Y. Ishida, J. Jagt, B. Thuy, T. Komatsu, T. Fujita

引用次数: 0

Recent Deep-Sea Benthic Foraminifera from an Active Volcanic Area: First Insights around Nishinoshima, Northwest Pacific 来自活跃火山区的最近深海底栖有孔虫：西北太平洋西之岛周围的首次发现

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-05-17 DOI: 10.2517/pr220024

Laurie M. Charrieau, S. Kawagata, I. McIntosh, Y. Tamura, Y. Nagai, T. Toyofuku

引用次数: 0

A New Genus and Species of Pentatomidae (Hemiptera) from the Upper Pliocene “Kabutoiwa Formation” in Gunma Prefecture, Japan 文章标题日本群马县上新世“Kabutoiwa组”五子虫科(半翅目)一新属新种

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-05-17 DOI: 10.2517/pr220029

Hiroaki Aiba, J. Souma, Yui Takahashi

引用次数: 0

Late Triassic (Late Early to Early Middle Norian) and Late Triassic or Early Jurassic Radiolarians from Limestone in the Tha Sao Area, Kanchanaburi Province, Western Thailand: Low-Latitude Fauna in the Eastern Tethys 泰国西部Kanchanaburi省Tha Sao地区石灰岩中的晚三叠世（晚早-早中诺里安）和晚三叠纪或早侏罗世放射虫：特提斯东部的低纬度动物群

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-04-05 DOI: 10.2517/PR220007

K. Sashida, Panus Hong, Tsuyoshi Ito, S. Salyapongse, P. Putthapiban

{"title":"Late Triassic (Late Early to Early Middle Norian) and Late Triassic or Early Jurassic Radiolarians from Limestone in the Tha Sao Area, Kanchanaburi Province, Western Thailand: Low-Latitude Fauna in the Eastern Tethys","authors":"K. Sashida, Panus Hong, Tsuyoshi Ito, S. Salyapongse, P. Putthapiban","doi":"10.2517/PR220007","DOIUrl":"https://doi.org/10.2517/PR220007","url":null,"abstract":"Abstract. Moderately-preserved Late Triassic (late early to early middle Norian) and Late Triassic or Early Jurassic radiolarians have been identified from two sections of limestone and dolomitic limestone, respectively in the Tha Sao area, Kanchanaburi Province in western Thailand. Previously these limestones have been assigned as the Permian because of the similarity of lithology without any fossil evidence. Section 1 is a succession of about 18 m in thickness, consisting of calcareous mudstone, micritic limestone, and dolomitic limestone, in ascending order. Section 2 is about 30 m in thickness and consisting of dolomitic limestone. Middle micritic limestone of about 10 m thick of Section 1 yielded diversified radiolarians. Dolomitic limestone of Section 2 yielded rare radiolarians from two levels. We identified radiolarians from five levels of micritic limestone and two levels of dolomitic limestone and totally identified 53 species belonging to 39 genera including two species of which generic position is uncertain and one new species Colum tekini Sashida and Ito sp. nov. At the Late Triassic time, the Tethys Ocean between Sibumasu and Indochina blocks almost closed due to the collision of these two continental blocks. Upper Triassic radiolarian-bearing limestones have been deposited in the eastern to western Tethyan areas within 35° of both hemispheres. The present radiolarian fauna is representative of low latitude Tethyan fauna. The faunal similarity between the eastern and western Tethys indicates the uniformity of the establishment of the low latitude fauna by the Late Triassic.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"28 1","pages":"37 - 67"},"PeriodicalIF":0.9,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49613836","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

Molluscan Faunal Changes from Brackish to Freshwater Deposits in the Lower Cretaceous Itsuki Formation of the Tetori Group, Japan 日本鸟取群下白垩世Itsuki组从咸淡水到淡水沉积物的软体动物区系变化

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-04-05 DOI: 10.2517/PR220022

S. Isaji

引用次数: 0

First Discovery of the Spinicaudatan Genus Carapacestheria Shen, 1994 in Asia 1994年在亚洲首次发现刺突藻属Carapatshenia Shen

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-04-05 DOI: 10.2517/PR220025

Gang Li

引用次数: 0

Spirally-Coiled Radiolarians in the Latest Jurassic–Earliest Cretaceous 侏罗纪晚期-白垩纪早期的螺旋盘绕放射虫

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-04-05 DOI: 10.2517/PR220026

Tsuyoshi Ito, A. Matsuoka, Hayato Yokoyama

{"title":"Spirally-Coiled Radiolarians in the Latest Jurassic–Earliest Cretaceous","authors":"Tsuyoshi Ito, A. Matsuoka, Hayato Yokoyama","doi":"10.2517/PR220026","DOIUrl":"https://doi.org/10.2517/PR220026","url":null,"abstract":"Polycystine radiolarians have siliceous shells. The shells of Nassellaria, one of the major orders of radiolarians, are generally tower-like. Spiral structures are known in the shells (e.g. Sashida and Tonishi, 1991) and spines (e.g. De Wever et al., 2003) of other radiolarians; however, none with spiral shells had been found in Nassellaria. We found two different genera of Nassellaria with spiral shells from the latest Jurassic–earliest Cretaceous sample from the Mariana Trench. The findings are extremely rare and are important when considering the shell formation in radiolarians. The sample (181-R003) is a laminated tuffaceous radiolarian claystone or clayey radiolarite collected from the Mariana Trench oceanward slope (15°28.7′N, 147°50.6′E: 6,316 m water depth) by “Shinkai 6500” of JAMSTEC (Japan Agency for Marine-Earth Science and Technology). Because of the occurrences of the Loopus primitivus (Matsuoka and Yao) and Pseudodictyomitra carpatica (Lozyniak) (Matsuoka, 1998), the sample was considered to correspond to the lower part of the Pseudodictyomitra carpatica Zone (KR1) (uppermost Tithonian to lower Berriasian, uppermost Jurassic–lowermost Cretaceous) by Matsuoka and Ito (2019). Further detailed information on the sample and cooccurring radiolarian species are mentioned in Matsuoka (1998). The sample yielded two specimens having spiral shells. Such specimens are called “spiral-mutant” in this article. The first specimen of the spiral-mutant belongs to Svinitzium pseudopuga Dumitrica (Figure 1). The shell of the spiral-mutant specimen appears to be uncoiled up to the third septa from the top, but from the fourth septa onward, the shell tilts in opposite directions on the front side (FigSpirally-coiled radiolarians in the latest Jurassic–earliest Cretaceous","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"28 1","pages":"68 - 70"},"PeriodicalIF":0.9,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42381377","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

A New Specimen of cf. Isanacetus laticephalus (Baleen Whale) from the Oi Formation, Ichishi Group (Late Early Miocene) in Japan 日本一石群Oi组（中新世晚期-早期）宽头鲸的新标本

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-04-05 DOI: 10.2517/PR210015

Yoshihiro Tanaka, M. Ohara, T. Kimura

{"title":"A New Specimen of cf. Isanacetus laticephalus (Baleen Whale) from the Oi Formation, Ichishi Group (Late Early Miocene) in Japan","authors":"Yoshihiro Tanaka, M. Ohara, T. Kimura","doi":"10.2517/PR210015","DOIUrl":"https://doi.org/10.2517/PR210015","url":null,"abstract":"Abstract. In the history of baleen whales, the early Miocene is one of not a well-known time. Many baleen whales from the Miocene are known as “cetotheres”. The “cetothere” Isanacetus laticephalus was a baleen whale from the early to middle Miocene that is only known from Japan. The holotype and paratype of I. laticephalus are well-preserved, and the age of the species I. laticephalus makes it one of the earlier basal plicogulans; however, its phylogenetic position is unclear. Here, a new cranium including the periotic from an early Miocene deposit (about 18.5 to 17.0 Ma) of the Oi Formation, Ichishi Group in Mie, Japan is reported as cf. I. laticephalus. The specimen displays a combination of four periotic features: (i) a large lateral tuberosity; (ii) a rectangular pars cochlearis; (iii) a robust neck of the posterior process, and (iv) a cerebral aperture of the facial canal that is smaller than that of the dorsal vestibular area. This combination of features could be diagnostic for I. laticephalus, among basal plicogulans from the early and middle Miocene. Adding more referred specimens will expand the diagnoses of I. laticephalus, and firmly support phylogenetic trees with this species.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"28 1","pages":"26 - 36"},"PeriodicalIF":0.9,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42614812","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

The New Brittle-Star Species Stegophiura takaisoensis (Echinodermata, Ophiuroidea) from the Pliocene of Ibaraki Prefecture, Central Japan 日本中部茨城县上新世的新脆星种高尾菊（棘皮动物纲，蛇尾目）

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-04-05 DOI: 10.2517/PR220028

Y. Ishida, M. Tagiri, Taichi Kato, Shoji Tsunoda, Yasuhisa Nakajima, B. Thuy, Lea D. Numberger-Thuy, T. Fujita

引用次数: 0

Carboniferous (Moscovian) Fusulines of the Beedeina lanceolata Zone in the Ichinotani Formation, Hida Marginal Terrane, Japan 日本Hida边缘阶地Ichinotani组Beedeina lanceolata带石炭系（Moscovian）燧发枪手

IF 0.9 4区地球科学

Paleontological Research Pub Date : 2023-03-01 DOI: 10.2517/PR220008

F. Kobayashi

引用次数: 0