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Dawazisaurus Brevis, A New Eosauropterygian From the Middle Triassic of Yunnan, China

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Acta Geologica Sinica(English Edition) 2016年第2期90卷 401-424页

作者： CHENG Yen-nien WU Xiao-chun tamaki sato SHAN His-yin National Museum of Natural Science 1 Kuan Chien Road Taichung Taiwan 40453 China Department of Earth Sciences National Cheng Kung University 1 University Road Tainan Taiwan 701 China Canadian Museum of Nature PO Box 3443 STN 'D’ Ottawa Ontario KIP 6P4 Canada Tokyo Gakugei University 4-1-1 Nukui-Kita-Maehi Koganei City Tokyo 184-8501 Japan

Dawazisaurus brevis（gen. et sp. nov.） is a newly discovered Triassic marine reptile, represented by a complete skeleton from Member II of the Guanling Formation of Luoping, Yunnan Province, China. This paper aims to（1） present a thorough description of the species,（2） make a detailed comparison to demonstrate if the species can be referred to any known sauropterygian taxa, and（3） conduct phylogenetic analyses to establish the internal relationships of the species with other sauropterygians. In addition, the discovery of Dawazisaurus provides a chance not only to test the phylogenetic patterns of the Sauropterygia obtained by previous studies but also to evaluate the previous hypotheses on the origin of the sauropterygian groups at different levels. D. brevis is an eosauropterygian, characterized by a unique combination of derived features such as a pair of large nasals joining in the formation of the internarial septum, a short trunk with 16 dorsal vertebrae; the zygapophyses of the trunk vertebrae very small or weakly developed; the posterior margin of the skull roof deeply V-shaped, and an ossified distal carpal 5. Phylogenetic analysis indicates that D. brevis appears to be more closely related to the Nothosauroidea than the Pistosauroidea within the Eosauropterygia.

关键词： Sauropterygia Dawazisaurus brevis Guanling Formation Early Triassic Yunnan China

FIRST COMPLETE PISTOSAUROID FROM THE TRIASSIC OF CHINA

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FIRST COMPLETE PISTOSAUROID FROM THE TRIASSIC OF CHINA

贵州上三叠统一新的海龙(爬行纲：双孔亚纲)(英文)

第二届国际古生物学大会

作者： tamaki sato National Science Museum TokyoJapan.Canadian Museum of NatureOttawaCanada

Triassic pistosauroids (Reptilia;Sauropterygia) are important for understanding the origin of the Plesiosauria, a group of derived sauropterygians that achieved considerable diversity during the Jurassic and Cretaceous. Remains of Triassic pistosauroids have been known from Europe, North America, and China, but due to the lack of well-preserved specimens, our knowledge of their anatomy has been limited. Here we report a new pistosauroid represented by a virtually

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古脊椎动物学报 2007年第3期45卷 246-260页

作者：程延年吴肖春佐藤环中国台湾自然科学博物馆台中40453 加拿大自然博物馆日本国立科学博物馆

根据头骨和下颌建立了海龙一新属新种——短吻贫齿龙(Miodentosaurus brevis *** ***.)。其正型标本是采自贵州三叠纪法郎组的一具骨架(台中自然科学博物馆标本编号NMNS-004727/F003960)。虽然头后骨胳还没有修理,但是几近完好的头骨和... 详细信息

根据头骨和下颌建立了海龙一新属新种——短吻贫齿龙(Miodentosaurus brevis *** ***.)。其正型标本是采自贵州三叠纪法郎组的一具骨架(台中自然科学博物馆标本编号NMNS-004727/F003960)。虽然头后骨胳还没有修理,但是几近完好的头骨和下颌显示出许多与众不同的特征,足以确定该标本代表了一新的海龙属种。短吻贫齿龙是个体较大的海龙,其全长超过4 m,头骨背部最长约为33 cm。吻直且极短是其最显著的特征之一。其他主要特征有:前颌骨沿前背中央有一隆嵴;上颌仅前颌骨有6枚圆锥形齿,无上颌骨齿;上颌骨沿前腹侧缘有一沟槽;下颌齿骨齿都集中在前端且至多不超过6枚。依据上述这些特征很易把短吻贫齿龙与其他已知海龙相区别。短吻贫齿龙头骨顶面松果孔大且很前位,头骨腭面的锄骨和翼骨均无齿,它的颈较长(至少可以辨认出13个颈椎)。这些特征显示短吻贫齿龙可能与包括中国安顺龙属(Anshunsaurus)在内的Askeptosauroidea超科有相近的系统关系。

关键词：贵州卡尼期法郎组双孔亚纲海龙类

短吻贫齿龙(双孔亚纲:海龙目):头后骨骼及系统关系研究(英文)

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古脊椎动物学报 2009年第1期47卷 1-20页

作者：吴肖春程延年佐藤环单希瑛加拿大自然博物馆中国台湾自然科学博物馆台中40453 日本东京学艺大学

短吻贫齿龙是根据一保存较完整的头骨和下颌标本建立的;标本采自贵州关岭地区三叠系法郎组灰岩。对其头后骨骼进行了详细描述。短吻贫齿龙在肩带的乌喙骨和间锁骨及腰带的肠骨显示了与众不同的特征,例如:紧靠肩臼后方乌喙骨有一明显的凹... 详细信息

短吻贫齿龙是根据一保存较完整的头骨和下颌标本建立的;标本采自贵州关岭地区三叠系法郎组灰岩。对其头后骨骼进行了详细描述。短吻贫齿龙在肩带的乌喙骨和间锁骨及腰带的肠骨显示了与众不同的特征,例如:紧靠肩臼后方乌喙骨有一明显的凹,间锁骨后半部比前部要窄很多,及肠骨背突末端加宽等。头骨进一步细修表明,其中一些部位需要进行重新记述。依据头后骨骼和头骨中的新信息,对短吻贫齿龙的特征作了修订。系统关系分析表明,贫齿龙是个askeptosaurid,其下颌宽大于长的反关节突和肱骨缩小的三角-胸大肌嵴表明它与产自瑞士和意大利的Askeptosaurus关系最近。

关键词：贵州关岭三叠纪海龙目贫齿龙头后骨骼系统关系

短吻贫齿龙(双孔亚纲:海龙目)的新材料及补充研究(英文)

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古脊椎动物学报 2010年第1期48卷 1-10页

作者：赵丽君佐藤环刘俊李淳吴肖春浙江自然博物馆杭州310012 日本东京学艺大学中国科学院古脊椎动物与古人类研究所北京100044 加拿大自然博物馆

记述了产自贵州关岭法郎组瓦窑段(上三叠统)短吻贫齿龙一新材料。新标本头后骨骼十分完整,使我们对该海龙的全身骨骼形态有了一个完整的认识,尤其是澄清了其肩带及前、后肢的解剖学特征。短吻贫齿龙牙齿稀少且局限于上、下颌的前端,以... 详细信息

记述了产自贵州关岭法郎组瓦窑段(上三叠统)短吻贫齿龙一新材料。新标本头后骨骼十分完整,使我们对该海龙的全身骨骼形态有了一个完整的认识,尤其是澄清了其肩带及前、后肢的解剖学特征。短吻贫齿龙牙齿稀少且局限于上、下颌的前端,以及末端指/趾骨(爪)扁平等性状表明,该种不是纯粹的肉食动物。依据新材料,短吻贫齿龙在局部形态上存在个体变异,并确认后肢趾趾式(2-3-4-5-5)可作为该海龙的特征之一。

关键词：海龙目贫齿龙骨架个体变异

中国三叠纪纯信龙类化石研究及其对蛇颈龙起源的意义

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自然博物 2017年第1期 2-8页

作者：赵丽君顾圣啸佐藤环李淳浙江自然博物馆杭州310014 日本东京学艺大学东京184850 中国科学院古脊椎动物与古人类研究所北京100044

三叠纪纯信龙类与繁盛于侏罗纪和白垩纪海洋的蛇颈龙类关系密切。中国目前已在贵州、广西和云南的几处地点发现了三叠纪纯信龙类化石,有效命名4属4种。其中,宋氏清镇龙和东方广西龙化石标本极为破碎,分别出自贵州清镇中三叠统拉丁阶和... 详细信息

三叠纪纯信龙类与繁盛于侏罗纪和白垩纪海洋的蛇颈龙类关系密切。中国目前已在贵州、广西和云南的几处地点发现了三叠纪纯信龙类化石,有效命名4属4种。其中,宋氏清镇龙和东方广西龙化石标本极为破碎,分别出自贵州清镇中三叠统拉丁阶和广西武鸣下三叠统奥伦尼克阶地层;李氏云贵龙产自云贵交界中三叠统拉丁阶地层中,已经发现了近10件保存很完整的云贵龙化石;短吻王龙发现于贵州兴义中三叠统法郎组竹杆坡段地层。近年来我国西南地区多具保存精美的纯信龙类化石的发现,为揭示纯信龙类的形态特征、个体发育和系统演化提供了新的线索。大量保存完整的纯信龙类化石证据表明,中国西南地区是蛇颈龙祖先类型——纯信龙类演化的重要地区,这对研究蛇颈龙起源与演化有着重要的意义。

关键词：纯信龙类三叠纪蛇颈龙起源系统演化

Germination and appressorium formation of Pyricularia oryzae Cavara can be inhibited by reduced concentration of Blasin~? Flowable with carbon dioxide microbubbles

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Journal of Integrative Agriculture 2018年第9期17卷 2024-2030页

作者： tamaki Masahiko Kobayashi Fumiyuki Suehiro Keisuke Ohsato Shuichi sato Michio School of Agriculture Meiji University Faculty of Applied Life Science Nippon Veterinary and Life Science University

We investigated the possibility to reduce the usage of Blasin^Flowable （BF）, a disinfectant inhibiting the germination and appressorium formation of Pyricularia oryzae Cavara conidia, by using carbon dioxide microbubbles （CO2MB）. Germination was significantly inhibited by 10 000-fold diluted BF solution containing CO2MB generated by the decompression-type generator compared to CO2 millibubbles （CO2MMB） and CO2MB generated by the gas-water circulating-type generator. Appressodum formation in the 10 000-fold diluted BF solution containing both CO2MBs was less than that in CO2MMB. Scanning electron microscopy showed wrinkles and dents on the surface of conidia treated with 5 000-fold diluted BF solution containing both CO2MBs. Via transmission electron microscopy, we observed the expansion of the vacuole and the intracellular space and bloated or absent lipid granules in the conidia treated with BF solution containing both CO2MBs. Our results show that inhibition of the conidium germination and appressorium formation of P. oryzae Cavara by 10 000-fold diluted BF solution could be achieved by using the decompression-type CO2MB.

关键词： appressorium formation Blasin^Flowable germination Pyricularia oryzae carbon dioxide microbubble

Long-lived neutron-induced radioisotopes in OKTAVIAN facility concrete wall after 38 year-operation

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辐射防护 2020年第6期40卷 577-582页

作者： Fajar Panuntun Shingo tamaki Sachie Kusaka Fuminabo sato Isao Murata Graduate School of Engineering Osaka UniversityYamadaoka 2-1SuitaOsaka565-0871Japan

An intense 14 MeV neutron source facility named OKTAVIAN was installed in the A15 building,Osaka University in *** the operation period,new radioisotopes with various half-life have been produced as neutron activation products in its concrete wall *** this work,we investigated the concrete wall in the heavy irradiation room of OKTAVIAN using gamma spectrometry method to discover the presence of radioisotope having large half-life value(long-lived radioisotope)as neutron activation *** simulations were performed prior to measurement to predict the presence of long-lived radioisotopes by employing MCNP5 and FISPACT codes.A pre-calibrated Germanium detector with high energy resolution was employed to measure the *** long-lived activation products have been observed such as 152 Eu,54 Mn,65 Zn,22 Na and 60 *** activity of each radioisotope was derived after estimating the detector efficiency using *** a result of the measurement and analysis,the followings are concluded:(1)Though presence of activation products represents radiological risk to everyone who performs an experimental activity in the irradiation room of the OKTAVIAN facility,the present result shows that past experiments were carried out safely without any significant additional exposure dose coming from the wall for the last 38 years.(2)The approximated total fluence of D-T neutrons to the wall was successfully estimated from the produced radioisotope,152 Eu,because it has the longest half-life of 13.5 years among the observed radioisotopes.(3)From the results of(1)and(2),it could be possible to estimate the total activity of the concrete wall in the OKTAVIAN facility,which is very essential and important information,because this would be very valuable for decommissioning or disposal of the facility in the future.

关键词： OKTAVIAN concrete wall shielding long-lived neutron-induced product total fluenced D-T neutron