Atsushi Yabe

Atsushi Yabe
National Museum of Nature and Science | NMNS · Department of Geology and Paleontology

PhD

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38
Publications
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433
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Publications

Publications (38)
Article
Full-text available
The changing climate during the Cenozoic affected the diversity of plants in Patagonia, as species richness tends to increase during warm periods and decrease during cold periods. Precipitation is a significant factor shaping diversity, as shown in the case of central Chile during the Miocene. This study presents a reconstruction of the climate and...
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Plant macrofossils from the upper middle Miocene Konan Tuffaceous Sandstone and Mudstone Member of the Bifuka Formation, known as the Konan flora, northwest of Shibetsu City, Hokkaido, Japan, were taxonomically revised. A total of 31 taxa were recognized, which were assigned to 14 families and 19 genera, including a new fossil species, Salix palaeo...
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Plant macrofossils from the lower middle Miocene Ieda Group in northern Iwata City, Shi-zuoka, central Japan are reported for the first time. The assemblage consists of 29 taxa, represented by a single beech species and various deciduous species from the families Fabaceae, Ulmaceae, and Sapinda-ceae, along with some evergreen species of Fagaceae an...
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A palynostratigraphic study was conducted on the Upper Cretaceous Asuwa Formation cropping out at Ikeda Town, eastern Fukui Prefecture, central Japan, to make a precise determination of its age. An abundant and diverse assemblage of palynomorphs (52 genera and 72 species) was obtained from three horizons of mudstone in the upper member (the Sarao I...
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This study reports on two forms of Araucarian cone-scale complexes from the Aptian Kitadani Formation of the Tetori Group in Fukui Prefecture, Central Japan. One of these has been identified as a new fossil species:Araucarites kitadaniensis Yabe et Yukawa sp. nov. This is the first known occurrence of Araucarian macrofossils from the Tetori Group,...
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A new fossil cycad species, Sueria laxinervis, is described from the Upper Cretaceous (Maastrichtian) Quiriquina Formation in Cocholgüe, Bíobío Region, Chile. The generic assignment is supported by the taeniopterid-type leaf with haplocheilic stomata and sinuate anticlinal walls of leaf epidermal cells, while S. laxinervis clearly differs from the...
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Temporal and spatial changes of ten conifer genera that are endemic to East Asia were analyzed based on fossil data from humid temperate forests in the Japanese Islands and Korean Peninsula to elucidate the phytogeographic history, and to understand differences between those genera eliminated from the Japanese Islands and those that remained extant...
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Isolated legume fruits from the early–middle Miocene Shimo Formation of the Uchiura Group in Takahama Town, Fukui Prefecture, central Japan, are described in this paper. They are unique in yielding 1-coiled or curved and terete–moniliform shapes with both simple sutures constricting uniformly. A new fossil-species, Leguminocarpum oguruiensis, is de...
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In 1980, several of the original specimens of the Minoshirotori flora from the inland basin of Gujo City, middle west of Gifu Prefecture, central Japan, were donated to the National Museum of Nature and Science, Tokyo. This collection, together with other collections in the museum, was taxonomically revised in the present study in order to determin...
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Morphological and cuticular features of Cunninghamia protokonishii were examined by studying the original material and additional fossils that were collected from the lowest Miocene to the lower Pleistocene of Japan and Korea. The species is characterized by foliar morphology that superficially resembles C. konishii, but differs by large terminal s...
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The relationship between the landmass of the Southern Hemisphere has been broadly highlighted in the literature since Hooker's times, where Nothofagus is considered key to understand the biogeographical history of the western Gondwanland.
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The Kaminayoro flora, a late middle to late Miocene megafossil flora, is preserved in the Panke Formation in Shimokawa town, Hokkaido, Japan. It comprises 33 taxa in 14 families and 19 genera, including 1 fern, 3 conifers, and 29 angiosperms (1 monocot and 28 eudicots), comparable with the Mitoku-type flora of middle Miocene to early Pliocene age....
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The Early Cretaceous Tetori Group in northern Central Japan was deposited in the eastern margin of the Asian Continent at mid-latitudes. It consists of two depositional stages: DS2 (Berriasian–late Hauterivian; mainly brackish environment with intercalations of marine horizons) and DS3 (Barremian–Aptian; freshwater environments only). Review of the...
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Cone scales and leaves of the Araucariaceae are reported from the Loreto Formation in Río de Las Minas, Punta Arenas, Chile. Two types of cone scales including one new species, Araucaritesalatisquamosus are recognized. They are similar to Araucaria section Eutacta. Two types of leaves are assigned to Araucaria nathorstii Dusén, and one new type is...
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Premise of research. The Cenozoic fossil record is crucial for understanding the evolution of the remarkably high diversity of angiosperms. However, the quality and biases of the angiosperm fossil record remain unclear mainly due to the lack of a global database. Methodology. We introduce a new global occurrence-based database for Cenozoic angiospe...
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Cenophytic plant fossil studies in Japan is reviewed for the past four decades. Intensive stratigraphic and paleobotanies studies have proceeded in each geologic time period, drawing a detailed history of floristic changes in Japan. Thus, Cenophytic floral changes in Japan have been well explained in terms of global climate as well as paleogeograph...
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Aim We used fossil and phylogenetic evidence to reconstruct climatic niche evolution in Nothofagus , a Gondwana genus distributed in tropical and temperate latitudes. To assess whether the modern distribution of the genus can be explained by the tropical conservatism hypothesis, we tested three predictions: (1) species from all Nothofagus subgenera...
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The Tetori Group, which crops out in the Inner Zone of central Japan, has been extensively studied for its rich floral and vertebrate fossil assemblages. The authors provide the first contribution to the palynoflora of the Kitadani Formation, which has been dated as late Barremian to early Aptian on the basis of the freshwater bivalves recorded fro...
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A late Middle Miocene megafossil flora (Konan Flora) is preserved in lacustrine deposits in the Konan Tuffaceous Sandstone and Mudstone Member of the Bifuka Formation in Shibetsu City, Hokkaido, the northernmost island in Japan. The Konan Flora is composed of 38 taxa in 17 families and 24 genera and includes 4 evergreen conifers, 1 monocotyledonous...
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Three silicified woods were collected as boulders from the Sugiyama River at Kitadani-cho, Katsuyama City, Fukui Prefecture. One was identified as Xenoxylon latiporosum (Cramer) Gothan. Each of the other two has cupressoid and taxodioid cross-field pittings, respectively. The wood with cupressoid pittings was identified as Cupressinoxylon sp. of th...
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A number of coniferous leafy twigs of Brachyphyllum obesum with uncertain affinity were recovered from the Lower Cretaceous Kitadani Formation, the uppermost part of the Tetori Group at the Kitadani Dinosaur Quarry in Katsuyama City, Fukui Prefecture, Central Japan. They were dominant in fluvial marsh deposits with Podozamites lanceolatus and a few...
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The earliest fossil record of the genus Pseudotsuga (Pinaceae) in Asia, Pseudotsuga tanaii Huzioka, was reexamined with additional materials of seeds, leaves, cones, and twigs from the earliest Miocene Shichiku Flora of the Joban area, northeast Japan. These specimens were restudied to better understand the relationship of these fossils with the ex...
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Dinosaur and bird footprints from the Late Jurassic to Early Cretaceous Kowashimizu Formation of the Tetori Group have been newly discovered in the Asuwa River area of eastern Fukui City, Fukui Prefecture in the central part of Japan. The dinosaur footprints are those of a theropod and an ornithopod, and one footprint is considered to possibly be t...
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Five Early Miocene plant megafossil assemblages from two separate sequences in the Joban and Soma areas on the Pacific side of Northeast Japan, which are interpreted to have accumulated from vegetation in near-sea coastal lowland, are analyzed to discuss the temporal change of floral composition and causal change in terrestrial climate. The Mixed N...
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The plant megafossil assemblage of the Early Miocene Ito-o Formation in Fukui Prefecture, Central Japan was first described based on reexamination of the materials used in its original introduction, as well as those collected after that report. The plant megafossils came from lacustrine deposits and consist of 23 genera and 35 species principally r...
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Insect pests, fungi, and floating dust particles in the Fukui Prefectural Dinosaur Museum were monitored in fiscal years 2005 and 2006. Traps used to monitor both crawling and flying insects captured various kinds of insects around the museum entrance, while relatively few insects were captured from the storage areas and exhibition rooms. It is sug...
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Matsukawa et al. present a new interpretation of the age and geological correlation within the Tetori Group. Comparison of their data with our own studies and literatures, we comment on some problems remain unsolved in their paper, such as (1) stratigraphy of the Takinamigawa area, where various fossils including dinosaurs were recovered; (2) recog...
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A compressed coniferous leafy branch was collected from the Lower Cretaceous Kitadani Formation, the uppermost unit of the Tetori Group in the Takinami River area, Fukui Prefecture, Central Japan. The specimen has been identified as Brachyphyllum obesum, which was initially described from the Early Cretaceous (late Aptian to early Albian) of Portug...
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This paper reviews the study of the Tetori-type floras, with a major emphasis on the Tetori Flora, the plant fossil assemblages from the Tetori Group distributed in the Hokuriku region, Central Japan, and discusses the climatic changes inferred from them. The Tetori Flora recovered from the Lower Cretaceous Itoshiro and Akaiwa subgroups, upper two...
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Physiognomic analysis using CLAMP technique of Wolfe (1933) was performed to two plant megafossil assemblages from northern Thailand intramontane basins to obtain quantitative data on the mean annual temperature (MAT), cold month and warm month mean temperatures (CMMT & WMMT) and growing season precipitation (GSP). The assemblage from Ban Pa Kha (B...

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