An Upper Permian Coiled Radiolarian from Itsukaichi, Central Japan

Sashida, Katsuo; Tonishi, Keiji

doi:10.2307/1485747

Cited by 19 publications

(6 citation statements)

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“…phattalungensis Sashida and Igo (1992), PMO 250.525/65. (f) Grandetortura nipponica Sashida and Tonishi (1991), PMO 250.525/98. (g) Hegleria mammilla (Sheng & Wang, 1985), PMO 250.523/06.…”

Section: Resultsmentioning

confidence: 99%

Response of Siliceous Marine Organisms to the Permian‐Triassic Climate Crisis Based on New Findings From Central Spitsbergen, Svalbard

Foster,

Asatryan,

Rauzi

et al. 2023

Paleoceanog and Paleoclimatol

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Siliceous marine ecosystems play a critical role in shaping the Earth's climate system by influencing rates of organic carbon burial and marine authigenic clay formation (i.e., reverse weathering). The ecological demise of silicifying organisms associated with the Permian‐Triassic mass extinction is postulated to have elevated marine authigenic clay formation rates, resulting in a prolonged greenhouse climate during the Early Triassic. Yet, our understanding of the response of siliceous marine organisms during this critical interval is poor. Whilst radiolarians experienced the strongest diversity loss in their evolutionary history and perhaps also the greatest population decline of silica‐secreting organisms during this event, only a small number of Griesbachian (post‐extinction) localities that record siliceous organisms are known. Here, we report newly discovered latest Changhsingian to early Griesbachian (Clarkina meishanensis ‐ Hindeodus parvus Zone) radiolarians and siliceous sponge spicules from Svalbard. This fauna documents the survival of a low‐diversity radiolarian assemblage alongside stem‐group hexactinellid sponges making this the first described account of post‐extinction silica‐secreting organisms from the Permian/Triassic boundary in a shallow marine shelf environment and a mid‐northern paleolatitudinal setting. Our findings indicate that latitudinal diversity gradients for silica‐secreting organisms following the mass extinction were significantly altered, and that silica productivity was restricted to high latitude and deep water thermal refugia. This result has potential to further shape our understanding of changes in marine dissolved silica levels and in turn rates of reverse weathering, with implications for our understanding of carbon cycle dynamics during this interval.

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“…phattalungensis Sashida and Igo (1992), PMO 250.525/65. (f) Grandetortura nipponica Sashida and Tonishi (1991), PMO 250.525/98. (g) Hegleria mammilla (Sheng & Wang, 1985), PMO 250.523/06.…”

Section: Resultsmentioning

confidence: 99%

Response of Siliceous Marine Organisms to the Permian‐Triassic Climate Crisis Based on New Findings From Central Spitsbergen, Svalbard

Foster,

Asatryan,

Rauzi

et al. 2023

Paleoceanog and Paleoclimatol

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“…Other species in Sample 201025‐15R, such as Albaillella cavitata ranges from latest Capitanian to early Changhsingian (Nishikane et al, 2011; Sashida & Tonishi, 1986); N. inflata ranges from late Guadalupian to Changhsingian (Kuwahara et al, 2004; Sashida & Tonishi, 1986; Wang & Yang, 2011); T. musashiensis ranges from Wuchiapingian to Changhsingian (Kuwahara & Sano, 2017; Sashida & Tonishi, 1988); Nazarovella scalae ranges from Capitanian to Changhsingian (Feng et al, 2006; Kuwahara & Sano, 2017; Wang & Yang, 2011). The genera Areolicaudatus (Feng, 1992a), Grandetortura and Kashiwara (Sashida & Tonishi, 1985, 1991) have been also reported from the Upper Permian in western Yunnan, China and Japan. It is hence reasonable to assume that radiolarians from Sample 201025‐15R have a Late Permian, very probably Wuchiapingian‐early Changhsingian age.…”

Section: Radiolarian Assemblages and Age Indicationsmentioning

confidence: 99%

“…Therefore, Feng et al (2009) emphasized that the A. levis Zone might have a long age range from Wuchiapingian to Changhsingian (Table 1). Other species in Sample 201025-15R, such as Albaillella cavitata ranges from latest Capitanian to early Changhsingian (Nishikane et al, 2011;Sashida & Tonishi, 1986); N. inflata ranges from late Guadalupian to Changhsingian (Kuwahara et al, 2004;Sashida & Tonishi, 1986;Wang & Yang, 2011); T. musashiensis ranges from Wuchiapingian to Changhsingian (Kuwahara & Sano, 2017;Sashida & Tonishi, 1988); Nazarovella scalae ranges from Capitanian to Changhsingian (Feng et al, 2006;Kuwahara & Sano, 2017;Wang & Yang, 2011). The genera Areolicaudatus (Feng, 1992a), Grandetortura and Kashiwara (Sashida & Tonishi, 1985 2006); Wang and Yang (2011).…”

Section: Radiolarian Assemblages and Age Indicationsmentioning

confidence: 99%

Late Permian radiolarians from the ‘Middle‐UpperDevonian’ in the Paqiu area of theChangning‐MenglianBelt, western Yunnan, China and their bearings on analysing the remains of thePalaeo‐Tethys

et al. 2022

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The Changning-Menglian Belt in western Yunnan, China, is one of the key regions to decode the evolution of Palaeo-Tethys. However, the work has been hampered considerably by the loose definition and composite nature of some stratigraphic units in the belt. These units normally have varied lithological components (slices of sequences), most of which yield scarce fossils. An example is the 'Middle-Upper Devonian (D 2-3 )' unit, which was established to accommodate a series of cherts, shales, siltstones and sandstones, occurring rather frequently in the central zone of the Belt. Its age assignment was mainly based on the Late Devonian conodonts from some siliceous shale intervals. However, the 'D 2-3 ' unit contains strata of ages other than Middle-Late Devonian, as has been indicated by a few studies in the Chahe-Manxin area. The Late Permian radiolarians have been obtained from bedded cherts of the 'D 2-3 ' in Paqiu area which provided the first solid evidence for the presence of Late Permian beds in the 'D 2-3 ' in this area. Radiolarians from two chert outcrops about 3 km apart can be assigned to two Wuchiapingian-Changhsingian assemblages, namely, the Albaillella levis and Albaillella protolevis assemblages, respectively, with the former being slightly younger than the latter. Statistical analysis of Permian radiolarians from different localities in the Belt shows that Late Permian radiolarians are much commoner than Middle Permian radiolarians and Early Permian radiolarians. A review of the taxonomical composition of Late Permian radiolarians of the Belt shows that faunas from different localities can be classed into three groups, according to their contents of albaillellaians, latentifistularians, entactinarians and spumellarians, whose depositional environments correspond respectively to deep water (>500 m), intermediate water (200-500 m), and shallow water depths (<200 m). Such a composition indicates that the Late Permian radiolarian-bearing siliceous rocks in the Changning-Menglian Belt are slices from various palaeogeographic settings.

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“…The species diversity ratio of Spumullaria, Entactinaria, and Latentifistularia is 0.33:0.33:0.33. The radiolarian fauna from the Meishan section contains the Latentifistularia Grandetortura nipponica Sashida & Tonishi, 1991 and the Spumellarian Copicyntra robustodentata Kozur & Mostler, 1989, Copicyntroides sp., and Copicyntroides sp. cf.…”

Section: Comparison Of Radiolarian Faunas From Chaohu Meishan and Domentioning

confidence: 99%

A late Changhsingian (latest Permian) radiolarian fauna from Chaohu, Anhui and a comparison with its contemporary faunas of South China

Yang

Zheng

et al. 2008

Alcheringa: An Australasian Journal of Palaeontology

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A well-preserved late Changhsingian radiolarian fauna (15 species attributed to 12 genera) is recorded from the upper part of the Talung This fauna is more diverse than the fauna from the Meishan section in Zhejiang Province but is less diverse than the fauna of the Dongpan section in Guangxi Province, South China. The new fauna incorporates a higher percentage of Latentifistularia forms than the fauna from the Meishan section, but incorporates a lower percentage of Latentifistularia and Albaillellaria forms than that from the Dongpan section. These differences could be due to deposition of the Chaohu sediments in deeper waters than at Meishan, but in shallower waters than at Dongpan.

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An Upper Permian Coiled Radiolarian from Itsukaichi, Central Japan

Cited by 19 publications

References 1 publication

Response of Siliceous Marine Organisms to the Permian‐Triassic Climate Crisis Based on New Findings From Central Spitsbergen, Svalbard

Response of Siliceous Marine Organisms to the Permian‐Triassic Climate Crisis Based on New Findings From Central Spitsbergen, Svalbard

Late Permian radiolarians from the ‘Middle‐UpperDevonian’ in the Paqiu area of theChangning‐MenglianBelt, western Yunnan, China and their bearings on analysing the remains of thePalaeo‐Tethys

A late Changhsingian (latest Permian) radiolarian fauna from Chaohu, Anhui and a comparison with its contemporary faunas of South China

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