A Cisuralian (early Permian) radiolarian assemblage, including 12 species of seven genera (Parafollicucullus, Albaillella, Latentifistula, Latentibifistula, Pseudotormentus, Quadricaulis, and ...Polyfistula) and seven undetermined morphotypes of the genera Entactinia and Trilonche, were obtained from bedded cherts of the Hachioji section in the Ashio terrane, Jurassic accretionary complex, central Japan. One new species Latentibifistula clathrata nov. sp. is described herein. This new species is diagnosed as Latentibifistula with a latticed surface and three coplanar arms of varied length.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
The biostratigraphically important Permian radiolarian genera Pseudoalbaillella sensu stricto and Follicucullus (Follicucullidae, Polycystinea) are discriminated by morphological gaps in their wings ...and segmentation. Previous statistical analyses demonstrated that Longtanella fills morphological gaps between these two genera. Longtanella has long been regarded as a junior synonym of Parafollicucullus, and only a few species have been described. Herein several true Longtanella species are recognized from South China, and eight new species and five indeterminate species are described and illustrated to prove the validity of the genus Longtanella. In addition, a new genus, Parafollicucullinoides gen. nov., is described. Their palaeogeographic distributions and living environments are explored by applying correspondence analysis (CA), with occurrence datasets of selected fusulinacean genera from the Japanese Islands, China and Sundaland. CA results indicate that Longtanella was present to a limited extent in warmer conditions in the fusulinacean Province B and C during Kungurian-Roadian time, and possibly lived above the thermocline and below the deepest limit of fusulinaceans. The Pseudoalbaillella and the Follicucullus group preferred open ocean conditions, living below the thermocline and distributed not only in the 'Equatorial Warm Water Province', but also the northern peri-Gondwana Cool Water Province and the southern North Cool Water Province.
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IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
Conglomerate of the Lower Jurassic Kuruma Group contains microfossil-bearing clasts. In the present study, these microfossils were investigated via the hydrofluoric acid (HF)-etched surfaces of the ...clasts and residues produced during acid treatment. As a result, Permian (mainly Guadalupian–Lopingian) radiolarians were obtained from mudstone and chert clasts; spicules of indeterminate age were obtained from the chert clasts. The mudstone clasts were derivable from the Akiyoshi, Ultra-Tamba, Maizuru, and/or Hida-Gaien belts or equivalent units, while the spicule-dominated chert clasts likely originated from the Akiyoshi belt or equivalent units. Except for tuff and acidic volcanic rocks, the clast components of the Kuruma Group in this study are similar to the component rocks of the Akiyoshi belt.
Human activity, such as castellation for military affairs, is closely related to geology and geography. To determine the relationships between rock and castle distributions, this study plotted 29 ...castles on a geological map in the Kiryu and Ashikaga District of central Japan. Twenty-four castles were located on the region’s Jurassic accretionary complex. In particular, 13 castles, including Ashikaga, Omata, and Ono castles, were built on chert of the Jurassic accretionary complex. Two other castles, namely Kiryu and Takatsudo castles, are not located within chert distribution, but exposed chert is visible around the main fortifications of these castles. Because chert is harder than other rocks and forms precipitous land, castle builders appeared to have utilized these geological and geographical characteristics to enhance defense. We suggest that Japanese castles have potential as geoheritage that connects history, geology, and geography.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
The Middle Permian is a critical period when a possible cooling regime prevailed and massive deep-water cherty sediments were deposited in the South China Craton. An integration of radiolarian ...paleoecologic and geochemical studies from the Middle Permian Gufeng cherty succession of western Hubei Province, South China tests the relationships among oceanic productivity, redox conditions, and radiolarian responses as well as origin of the cherts. A total of 21 species and six undetermined species in 10 radiolarian genera are identified from the Gufeng Formation in the northern margin basin of the Yangtze Platform of the South China Craton. Three radiolarian Pseudoalbaillella globosa, Follicucullus monacanthus, and Follicucullus scholasticus zones were established and constrained the Gufeng Formation as Roadian to Middle Capitanian in age. The Gufeng cherts embrace a biologic and hydrothermal origin in the northern marginal basin and southern margin basin (the Nanpanjiang Basin) of the South China Craton, respectively. The high oceanic primary productivity in surface oceans resulted in the widespread reducing conditions in the bottom water column. Such high oceanic productivity event slightly predated the Middle Permian Kamura cooling event of the Panthalassian Ocean. Both the elevated continent weathering due to pre-eruptive crustal uplift of the Emeishan flood volcanism and active oceanic upwelling may have stimulated high oceanic productivity and facilitated the deposition of the Gufeng cherts. All radiolarians bloomed in relatively oxic conditions. Only shallow-water radiolarians, mainly spherical forms, proliferated in the reducing conditions, which also coincided with an enhanced oceanic productivity. The abundance of spherical radiolarians therefore is an ideal proxy indicating oceanic primary productivity.
•Three radiolarian zones were established, suggesting a Roadian to middle Captanian age for the Gufeng Formation;•The Gufeng cherts deposited in northern and southern marginal basins of South China Craton have different sources;•An increase in abundance of spherical radiolarians coincides with enhanced productivity in reducing conditions;•Oceanic productivity controlled deposition of Middle Permian organic-enriched sediments;•Surface ocean productivity influences redox condition of the bottom water.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK, ZRSKP
Radiolaria is a valuable age index fossil through the Phanerozoic. This article describes the characteristics of the non-taxonomic names of closed nassellarian radiolarians, that is, di-segmented ...closed nassellarian (DiCN), tri-segmented closed nassellarian (TrCN), tetra-segmented closed nassellarian (TeCN), and multi-segmented closed nassellarian (MuCN), based on the number of segments. This article points out a potential as a practical age index for DiCN and TrCN. The TrCN occurrence indicates a Jurassic–Cretaceous age. In particular, the waterdrop-shaped TrCN-dominant occurrence suggests a Middle–Late Jurassic age; the spherical TrCN-dominant occurrence suggests a Cretaceous age. DiCN occurrence indicates a Jurassic–Cretaceous age, and abundant in the Middle Jurassic–Cretaceous.
The effect of renal dysfunction on clinical outcomes following fractional flow reserve (FFR)-guided deferral of revascularization remains unelucidated.We retrospectively analyzed 224 patients with ...atherosclerotic coronary lesions who underwent deferred revascularization based on an FFR of >0.80. The median follow-up interval was 28.1 months. Patients were divided into 2 groups: the hemodialysis (HD) and the non-HD group. The non-HD group was further classified into 2 subgroups according to their estimated glomerular filtration rate (eGFR) level: eGFR <45, equivalent to chronic kidney disease stage 3b-5 and eGFR ≥45. We evaluated major adverse cardiac events (MACE), defined as a composite of cardiac death, myocardial infarction, and any revascularization.MACE occurred in 36 patients (16.1%). The rate of HD was significantly higher in the MACE group (19% vs 6%, P < .01). In non-HD patients, the eGFR was significantly lower in the MACE group (51.2 vs 63.2 mL/min/1.73 m2, P < .01). Overall, univariate Cox regression analysis revealed a significant relationship between HD and MACE (HR 2.91, P = .01), as did the multivariate model (HR 2.90, P = .01). Of the MACE, more deaths occurred in HD patients (15.8% vs 2.9%, P = .03). Among non-HD patients, eGFR <45 (HR 2.70, P = .02), FFR (per 0.01, HR 0.87, P < .01), and low-density lipoprotein cholesterol (per 10 mg/dL, HR 1.17, P = .02) were independent predictors of MACE. Any revascularization was more common in patients with eGFR<45 than in those with eGFR ≥45 (21.4% vs 7.3%, P = .02). Kaplan-Meier estimates revealed that the HD group showed a significantly lower MACE-free survival rate than the nonHD group (log-rank P < .01). In non-HD patients, the eGFR<45 group showed a lower MACE-free survival rate than the eGFR ≥45 group (log-rank P = .01).HD and reduced eGFR in non-HD patients were associated with adverse cardiac events after FFR-guided deferral of revascularization.
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