A. Gale, Y. Ishida, J. Jagt, B. Thuy, T. Komatsu, T. Fujita
{"title":"A New Asteroid (Echinodermata, Astropectinidae) and Ophiuroid (Echinodermata, Hemieuryalidae) from the Mid-Cretaceous of Southern Japan","authors":"A. Gale, Y. Ishida, J. Jagt, B. Thuy, T. Komatsu, T. Fujita","doi":"10.2517/pr220020","DOIUrl":"https://doi.org/10.2517/pr220020","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47096423","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}
Laurie M. Charrieau, S. Kawagata, I. McIntosh, Y. Tamura, Y. Nagai, T. Toyofuku
{"title":"Recent Deep-Sea Benthic Foraminifera from an Active Volcanic Area: First Insights around Nishinoshima, Northwest Pacific","authors":"Laurie M. Charrieau, S. Kawagata, I. McIntosh, Y. Tamura, Y. Nagai, T. Toyofuku","doi":"10.2517/pr220024","DOIUrl":"https://doi.org/10.2517/pr220024","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45629874","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}
{"title":"A New Genus and Species of Pentatomidae (Hemiptera) from the Upper Pliocene “Kabutoiwa Formation” in Gunma Prefecture, Japan","authors":"Hiroaki Aiba, J. Souma, Yui Takahashi","doi":"10.2517/pr220029","DOIUrl":"https://doi.org/10.2517/pr220029","url":null,"abstract":"","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44078211","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}
K. Sashida, Panus Hong, Tsuyoshi Ito, S. Salyapongse, P. Putthapiban
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.
{"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}
Abstract. This paper focuses on the molluscan faunal changes in the nonmarine deposits of the Lower Cretaceous (Barremian) Itsuki Formation of the Tetori Group, central Japan. In the lower part of the Itsuki Formation, the transition from brackish to freshwater environments is recognized by lithofacies, sedimentary structures, and fossil indices of molluscs and plant remains. The molluscan assemblages include eleven gastropod species and six bivalve species, and one new gastropod species, Probaicalia okurai sp. nov., is described. The brackish habitats in the delta-front were dominated by Myrene tetoriensis, which usually formed shell beds. The newly founded freshwater habitats on the fluvial environments were populated by Campeloma onogoense and Sphaerium coreanicum as pioneer immigrants. With the development of the fluvial floodplain, a variety of aquatic and semiaquatic microenvironments formed, thereby providing various habitats suitable for small gastropods.
{"title":"Molluscan Faunal Changes from Brackish to Freshwater Deposits in the Lower Cretaceous Itsuki Formation of the Tetori Group, Japan","authors":"S. Isaji","doi":"10.2517/PR220022","DOIUrl":"https://doi.org/10.2517/PR220022","url":null,"abstract":"Abstract. This paper focuses on the molluscan faunal changes in the nonmarine deposits of the Lower Cretaceous (Barremian) Itsuki Formation of the Tetori Group, central Japan. In the lower part of the Itsuki Formation, the transition from brackish to freshwater environments is recognized by lithofacies, sedimentary structures, and fossil indices of molluscs and plant remains. The molluscan assemblages include eleven gastropod species and six bivalve species, and one new gastropod species, Probaicalia okurai sp. nov., is described. The brackish habitats in the delta-front were dominated by Myrene tetoriensis, which usually formed shell beds. The newly founded freshwater habitats on the fluvial environments were populated by Campeloma onogoense and Sphaerium coreanicum as pioneer immigrants. With the development of the fluvial floodplain, a variety of aquatic and semiaquatic microenvironments formed, thereby providing various habitats suitable for small gastropods.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"28 1","pages":"1 - 25"},"PeriodicalIF":0.9,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48779561","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}
Abstract. The rare clam shrimp (spinicaudatan) genus Carapacestheria Shen, 1994 was originally described from the upper Lower–lower Middle Jurassic of Antarctica. Later, it was reported from the Middle Jurassic of Argentina and the lowest Cretaceous of the United Kingdom. Here, a new species, Carapacestheria cangshanensis sp. nov., is described from the Upper Jurassic Penglaizhen Formation in southwestern China. The subquadrate-shaped carapace of the new species has a distinct ornamentation pattern, which transitions from medium-sized reticulations to radial lirae. There are punctae within the polygonal cells and between the lirae. According to its geological range and geographical distribution, Carapacestheria first occurred in Antarctica, and later appeared in the northern hemisphere during the Late Jurassic.
{"title":"First Discovery of the Spinicaudatan Genus Carapacestheria Shen, 1994 in Asia","authors":"Gang Li","doi":"10.2517/PR220025","DOIUrl":"https://doi.org/10.2517/PR220025","url":null,"abstract":"Abstract. The rare clam shrimp (spinicaudatan) genus Carapacestheria Shen, 1994 was originally described from the upper Lower–lower Middle Jurassic of Antarctica. Later, it was reported from the Middle Jurassic of Argentina and the lowest Cretaceous of the United Kingdom. Here, a new species, Carapacestheria cangshanensis sp. nov., is described from the Upper Jurassic Penglaizhen Formation in southwestern China. The subquadrate-shaped carapace of the new species has a distinct ornamentation pattern, which transitions from medium-sized reticulations to radial lirae. There are punctae within the polygonal cells and between the lirae. According to its geological range and geographical distribution, Carapacestheria first occurred in Antarctica, and later appeared in the northern hemisphere during the Late Jurassic.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"28 1","pages":"71 - 81"},"PeriodicalIF":0.9,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42097366","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}
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
{"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}
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.
{"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}
Y. Ishida, M. Tagiri, Taichi Kato, Shoji Tsunoda, Yasuhisa Nakajima, B. Thuy, Lea D. Numberger-Thuy, T. Fujita
Abstract. We describe three well-preserved, articulated brittle stars from the Pliocene Hatsuzaki Formation, Hitachi Group of Ibaraki, central Japan, as a new species, Stegophiura takaisoensis. It differs from its congeners in having dorsal arm plates with a high ridge and large swollen disk scales. The only other previously described extinct species unambiguously assigned to Stegophiura is S. miyazakii from the Upper Cretaceous of Japan. The new species from the Pliocene significantly adds to the fossil record of the genus, representing the second extinct species known to date and filling part of the fossil record gap between the Upper Cretaceous and the Recent representatives. The specimens have the disk and arms in intact live position, without any signs of transportation before buried. We assume that they were buried alive in their original deep shelf to upper slope habitat by rapid channel fills.
{"title":"The New Brittle-Star Species Stegophiura takaisoensis (Echinodermata, Ophiuroidea) from the Pliocene of Ibaraki Prefecture, Central Japan","authors":"Y. Ishida, M. Tagiri, Taichi Kato, Shoji Tsunoda, Yasuhisa Nakajima, B. Thuy, Lea D. Numberger-Thuy, T. Fujita","doi":"10.2517/PR220028","DOIUrl":"https://doi.org/10.2517/PR220028","url":null,"abstract":"Abstract. We describe three well-preserved, articulated brittle stars from the Pliocene Hatsuzaki Formation, Hitachi Group of Ibaraki, central Japan, as a new species, Stegophiura takaisoensis. It differs from its congeners in having dorsal arm plates with a high ridge and large swollen disk scales. The only other previously described extinct species unambiguously assigned to Stegophiura is S. miyazakii from the Upper Cretaceous of Japan. The new species from the Pliocene significantly adds to the fossil record of the genus, representing the second extinct species known to date and filling part of the fossil record gap between the Upper Cretaceous and the Recent representatives. The specimens have the disk and arms in intact live position, without any signs of transportation before buried. We assume that they were buried alive in their original deep shelf to upper slope habitat by rapid channel fills.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"28 1","pages":"82 - 96"},"PeriodicalIF":0.9,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44832101","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}
Abstract. The Carboniferous Ichinotani Formation in the Hida Marginal Terrane has lithologic and paleobiogeographic features of a continental margin affinity significantly different from those of the coeval seamountoriginated limestones widely distributed in the Japanese Islands. The fusuline fauna of the former is also different from that of the latter as exemplified by the restricted occurrence of late Moscovian Neostaffella and Hidaella in the former. The occurrence of these two genera is confined to the Podolskian Beedeina lanceolata Zone and are completely absent in the underlying and overlying biozones of the middle part of the Ichinotani Formation. Fusuline species mainly described in this paper are Beedeina lanceolata, Neostaffella umbilicata, Hidaella kameii, and Ozawainella vozhgalica prolific in and almost restricted to the B. lanceolata Zone, and Fusiella hayashii also characteristic and dominant in this zone.
{"title":"Carboniferous (Moscovian) Fusulines of the Beedeina lanceolata Zone in the Ichinotani Formation, Hida Marginal Terrane, Japan","authors":"F. Kobayashi","doi":"10.2517/PR220008","DOIUrl":"https://doi.org/10.2517/PR220008","url":null,"abstract":"Abstract. The Carboniferous Ichinotani Formation in the Hida Marginal Terrane has lithologic and paleobiogeographic features of a continental margin affinity significantly different from those of the coeval seamountoriginated limestones widely distributed in the Japanese Islands. The fusuline fauna of the former is also different from that of the latter as exemplified by the restricted occurrence of late Moscovian Neostaffella and Hidaella in the former. The occurrence of these two genera is confined to the Podolskian Beedeina lanceolata Zone and are completely absent in the underlying and overlying biozones of the middle part of the Ichinotani Formation. Fusuline species mainly described in this paper are Beedeina lanceolata, Neostaffella umbilicata, Hidaella kameii, and Ozawainella vozhgalica prolific in and almost restricted to the B. lanceolata Zone, and Fusiella hayashii also characteristic and dominant in this zone.","PeriodicalId":54645,"journal":{"name":"Paleontological Research","volume":"27 1","pages":"417 - 435"},"PeriodicalIF":0.9,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48009832","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}
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