T. Yamaguchi

Publications54
h-index7
Citations147
Highly Influential Citations13
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Oligocene ostracode assemblages from the Itanoura Formation, Nishisonogi Group, Nagasaki Prefecture, southwestern Japan
Abstract At least thirty-three ostracode species are reported for the first time from the Oligocene Itanoura Formation, Nishisonogi Group. This is also the first report of Oligocene ostracodes from… Expand
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Miocene Ostracodes from the Osaki Formation, Kukinaga Group, Tanegashima, Southwest Japan, and their Significance for the Biogeography of the Indo-West Pacific
Abstract. The Indo-West Pacific (IWP) benthos, which shows the highest diversity of marine organisms worldwide, is thought to have originated from the Tethys Ocean. Little is known about Miocene… Expand
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Late Miocene ostracodes from the Kubota Formation, Higashi-Tanagura Group, Northeast Japan, and their implications for bottom environments
Sixty-seven ostracode species including those in open nomenclature are identified in thirty-six samples from the upper Miocene Kubota Formation, Higashi-Tanagura Group, distributed in Fukushima… Expand
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No place to retreat: Heavy extinction and delayed recovery on a Pacific guyot during the Paleocene–Eocene Thermal Maximum
Modern global change threatens alpine ecosystems by forcing species to migrate to higher elevations and potentially eliminating alpine habitat altogether. Here we show that an analogous restriction… Expand
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Eocene Ostracodes from Hahajima Island of the Ogasawara (Bonin) Islands, Northwestern Pacific, and Their Paleobiogeographic Significance in the West Pacific
Abstract During the Eocene, Hahajima Island of the Ogasawara (Bonin) Islands of the Izu-Mariana Arc in the North Pacific was located near the present-day position of western Pacific Micronesia. We… Expand
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Sexual shape dimorphism and selection pressure on males in fossil ostracodes
Abstract. Sexual dimorphism is thought to have evolved via selection on both sexes. Ostracodes display sexual shape dimorphism in adult valves; however, no previous studies have addressed temporal… Expand
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Calcareous nannofossil and planktic foraminiferal biostratigraphy of the Paleogene Iojima Group in the Takashima Coalfield, Nagasaki Prefecture, southwest Japan
ABSTRACT The Paleogene Iojima Group is exposed in the Takashima coalfield of northwestern Kyushu, southwest Japan. The group is divided into four formations: the Okinoshima, Magome, Funazu, and… Expand
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Shallow-marine ostracode turnover during the Eocene–Oligocene transition in Mississippi, the Gulf Coast Plain, USA
Abstract The Eocene–Oligocene transition (EOT) is associated with a major eustatic sea-level fall, sea surface cooling, change in ocean stratification, and enhanced seasonality. While these changes… Expand
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Dwarfing of ostracodes during the Paleocene-Eocene Thermal Maximum at DSDP Site 401 (Bay of Biscay, North Atlantic) and its implication for changes in organic carbon cycle in deep-sea benthic…
Abstract The Paleocene–Eocene Thermal Maximum (PETM) has been held up as a past analog to future environmental change and presents the opportunity to study climate impacts on marine communities.… Expand
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Paleogene newfoundland sediment drifts
Integrated Ocean Drilling Program Expedition 342 was designed to recover Paleogene sedimentary sequences with unusually high deposition rates across a wide range of water depths (Sites U1403–U1411).… Expand
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