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1.
    
A new genus with two new species, Scabolyda orientalis gen. et sp. nov. and Scabolyda incompleta sp. nov., assigned to the subfamily Juralydinae in the family Pamphiliidae are described and illustrated. They were collected from the Middle Jurassic Jiulongshan Formation and the Lower Cretaceous Yixian Formation in northeastern China. They represent the first fossil pamphiliids described from China.  相似文献   

2.
    
Juraheterophlebia sinica, a new species of damsel-dragonfly, is described from the Middle Jurassic of China. Its fore- and hind wings in connection to the body allows comparison of the type genera of the families Erichschmidtiidae and Juraheterophlebiidae, respectively based on a forewing and a hind wing. Juraheterophlebiidae is a junior synonym of the Erichschmidtiidae. The new fossil confirms the previous attributions of Erichschmidtia and Juraheterophlebia to the clade Heterophlebioptera.  相似文献   

3.
    
An archaeocyathan fauna from a single limestone lens in the upper Cymbric Vale Formation at Mt. Wright shows species in common with the historic Ajax Mine fauna of the Flinders Ranges, South Australia. The Cymbric Vale fauna is considered equivalent to the lower Sanashtykgol ‘horizon’ of the Altay Sayan fold belt of Siberia.

New taxa described are the genera Hyptocyathus (Inessocyathacea, Hyptocyathidae fam. nov.), Aporosocyathus (Annulocyathidae), Wrighticyathus (Sigmocyathacea, Wrighticyathidae fam. nov.), Flexicyathus (Porocoscinidae) and Bractocyathus (Polycoscinidae), and the species Erugatocyathus cymbricensis and Veronicacyathus concavus.  相似文献   

4.
古村落旅游开发的初步研究--以安徽黟县古村落为例   总被引:24,自引:1,他引:24  
胡道生 《人文地理》2002,17(4):47-50
古村落是一种特殊类型的旅游地,其开发利用有其独特的个性。本文试以安徽黟县古村落为例对这一问题进行了初步探讨,文章对黟县古村落旅游资源进行了评述,指出可持续旅游是其开发的目标,基于此文章提出其旅游开发的原则和方向。  相似文献   

5.
李凡  金忠民 《人文地理》2002,17(5):17-20,96
安徽黟县的皖南明清古民居群是世界文化遗产,本文在对西递、宏村和南屏三个古村落调查的基础上,整理出旅游对古村落的经济、社会文化和环境的影响指数,并对比旅游对三个古村落的影响程度,分析了古村落旅游发展影响效应已呈现出的阶段性特点,即西递的旅游影响效应要高于宏村和南屏。并指出目前中国古村落的旅游发展过程中存在着相似的模式:古村落的保护、规划和旅游开发是旅游可持续发展的生命轴线,其中社区村民和地方政府是两个最重要影响因素,在古村落的旅游发展过程中,双方应在考虑到彼此的利益的前提下,达成良性的互动机制,以确保古村落旅游的可持续发展。  相似文献   

6.
CaramÉs, A., Martinez, M., Concheyro, A., RemÍrez, M. & Adamonis, S., 6 August 2019 2019. Holothuroidea: new records from the Lower Cretaceous of the Agrio Formation, Neuquén Basin, Argentina. An integrated study with foraminifers and calcareous nannofossils. Alcheringa XX, xx–xx. ISSN 0311-5518

New records of holothurian ossicles (Echinodermata) from the Lower Cretaceous Agrio Formation, Mendoza Group, in the northern Neuquén Basin, west-central Argentina, represent, excepting some general mention of ossicles, the first collection from the Lower Cretaceous of South America. The discovery is one of the few worldwide records of holothurian remains from this age. The analysed skeletal elements are associated with other microfauna and nannoflora retrieved from washed residues of claystones and marlstones of the lower strata of the Pilmatué Member, in Área 3000 and Puerta Curaco sections. The calcareous microfossil assemblage is composed almost exclusively of the foraminifera Epistomina loncochensis, suggesting quiet marine environments and low levels of dissolved oxygen in the bottom/water interface. A late Valanginian age is confirmed by the nannofossil assemblage found together with the holothurian ossicles. Analysis of ossicle shapes allows their attribution to molpadiids (Molpadida: Molpadiidae): one two-armed racquet-like single ossicle that remains as an indeterminate molpadiid and a new genus and species proposed for the abundant cross-shaped and star-shaped ossicles. The latter, owing to the presence of four holes and the lack of a spire or some elevation projecting well out from surface in the centre of the plates, resemble two known species of the genus Cruxopadia Reich, but they differ in their arm morphology.

Andrea Caramés [], IDEAN—Instituto de Estudios Geológicos Andinos ‘Don Pablo Groeber’, CONICET, Ciudad Universitaria Pabellón II, Intendente Güiraldes 2160-C1428EHA Buenos Aires, Argentina; Mariano Martinez [], Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’, CONICET, A. Gallardo 470-C1405DJR Buenos Aires, Argentina; Andrea Concheyro [], IDEAN—Instituto de Estudios Geológicos Andinos ‘Don Pablo Groeber’, CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón II, Intendente Güiraldes 2160-C1428EHA Buenos Aires, Argentina, and Instituto Antártico Argentino, Argentina; Mariano Remírez [], CIG—Centro de Investigaciones Geológicas, CONICET, Universidad Nacional de La Plata, Diagonal 113 N° 275-B1904DPK, La Plata, Argentina; Susana Adamonis [], Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IDEAN. Ciudad Universitaria Pabellón II, Intendente Güiraldes 2160-C1428EHA Buenos Aires, Argentina.  相似文献   

7.
    
Góis, F., Scillato-Yané, G.J., Carlini, A.A. & Guilherme, E. 2013. A new species of Scirrotherium Edmund & Theodor, 1997 (Xenarthra, Cingulata, Pampatheriidae) from the late Miocene of South America. Alcheringa 37, 175–186. ISSN 0311-5518.

A new species of Scirrotherium Edmund & Theodor (Pampatheriidae) is described: S. carinatum. This genus was previously represented by a single species, S. hondaensis Edmund & Theodor, 1997, recorded from the middle Miocene (Laventan) of Colombia. Pampathere remains are common in the ‘Conglomerado osífero’ (late Miocene) of the Ituzaingó Formation in the Paraná River cliffs of Entre Ríos, Chubut (Argentina) and Acre (Brazil). All of them were referred to Kraglievichia paranense, and they are mostly osteoderms. However, only a few of these specimens are strictly consistent with that species. The new species described herein differs from S. hondaensis in having very thin osteoderms with more elaborate ornamentation. The movable band (or imbricate) osteoderms have a sculptured exposed surface and a single transverse row of anterior foramina; the lateral margins are wider and also bear foramina, and the longitudinal central elevation is long and proximally wide, and forms a posteriorly raised crest. This elevation is delimited by a fairly broad and shallow depression on each side, separating the marginal elevation from the longitudinal central one. The exposed surfaces of fixed (or fused) osteoderms bear large and deep anterior foramina, the longitudinal central elevation and delimiting depressions are very pronounced. This new species increases the known diversity of the pampatheres from the ‘Conglomerado osífero’. Additionally, a new nomenclatural scheme for Pampatheriidae osteoderms is proposed.

Flávio Góis [goisf@fcnym]unlp.edu.ar], Gustavo Juan Scillato-Yané [scillato@fcnym.unlp.edu.ar], Alfredo Armando Carlini [acarlini@fcnym.unlp.edu.ar], Departamento Científico Paleontología Vertebrados, Museo de La Plata, Paseo del Bosque, s/n, 1900, La Plata, Buenos Aires, Argentina and CONICET; Edson Guilherme [guilherme@ufac.br], Universidade Federal do Acre, Laboratório de Pesquisas Paleontológicas (LPP), BR 364, Km 04, 69.915-900. Rio Branco, AC, Brazil. Received 11.5.2012; revised 31.7.2012; accepted 4.9.2012 .  相似文献   

8.
Yuan, D.X., Zhang, Y.C., Zhang, Y.J., Zhu, T.X. & Shen, S.Z., 2014. First records of Wuchiapingian (Late Permian) conodonts in the Xainza area, Lhasa Block, Tibet, and their palaeobiogeographic implications. Alcheringa 38, 546–556. ISSN 0311-5518.

Conodonts are among the best fossil groups to provide high-resolution biostratigraphic correlation and resolve the palaeobiogeographic evolution of the Permian. However, they have been rarely reported from the Lhasa Block in Tibet. Here we report the first discovery of Wuchiapingian (early Lopingian) conodonts from the Xiala Formation in the Lhasa Block, Tibet. This conodont fauna includes two genera and three species (Clarkina liangshanensis, C. orientalis, Iranognathus sp.). The conodont fauna indicates that the Xiala Formation previously assigned to the Guadalupian actually ranges from late Kungurian to late Wuchiapingian. The existence of the late Wuchiapingian conodont species Clarkina orientalis and C. liangshanensis in the Lhasa Block provides additional data to support the viewpoint that this block probably had been in a warm-water regime during the Wuchiapingian (Lopingian).

Dong-Xun Yuan [], School of Earth Sciences and Engineering, Nanjing University, 22 Hankou Road, Nanjing, 210093, PR China and State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing, 210008, PR China; Yi-Chun Zhang [] and Shu-Zhong Shen [] (corresponding author), State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing, 210008, PR China; Yu-Jie Zhang [] and Tong-Xing Zhu [], Chengdu Center, China Geological Survey, 2 Renming Road North, Chengdu, 610081, PR China. Received 9.1.2014; revised 1.4.2014; accepted 28.4.2014.  相似文献   

9.
朝鲜后期,北伐论激起朝鲜士大夫小中华意识高度发展,因此有学者将其称为"朝鲜中华主义"。然而从事实来看,朝鲜士大夫虽然有很强的文化自尊意识,但是这种自尊意识是建立在春秋大一统之上的,小中华意识的发展反而使一元的天下观进一步强化,将中华秩序理想化。所以,朝鲜后期小中华意识的发展并不表示朝鲜士大夫以朝鲜为中华之正统或中国之正统,反而继续承认朝鲜为小中华,而在事实上更不证明朝鲜为当时东亚的文化中心国家,所以我们在使用"朝鲜中华主义"概念时尚需仔细斟酌。  相似文献   

10.
    
Ordovician graptolite-bearing strata in eastern Yunnan were deposited in nearshore, shallow-water environments. Graptolites are systematically described from three sections through the Hungshihyen Formation in eastern Yunnan Province, China: (1) Hongshiya section near Ercun village, Kunming; (2) Liujiang section, Luquan; and (3) Guihuaqing Reservoir section, Luquan. The graptolite fauna, characterized by the predominance of deflexed forms, includes ten species in two genera: Baltograptus turgidus (Lee), B. varicosus (Wang), B. yunnanensis (Li), B. calidus (Ni), B. enshiensis (Ni), Baltograptus sp. cf. B. deflexus (Elles & Wood), Baltograptus sp. cf. B. bolivianus (Finney & Branisa), Baltograptus sp. A, Baltograptus sp. B and Corymbograptus v-fractus minor (Li). A detailed morphological study of these southern Chinese graptolite faunas suggests that Baltograptus wudingensis (Li) is a junior synonym of B. turgidus (Lee); Baltograptus kunmingensis (Ni) is a junior synonym of B. varicosus (Wang); and Baltograptus triangulatus (Ni) is a junior synonym of B. yunnanensis (Li). The B. varicosus Biozone is newly recognized within the middle part of the Hungshihyen Formation, replacing the former Didymograptus deflexus Biozone. This interval is well correlated to the Baltograptus jacksoni Biozone in Britain, the Tetragraptus akzharensis, ‘Baltograptus cf. deflexus’ and Didymograptus bifidus (lower part) biozones in NW Argentina (eastern Cordillera), and the Acrograptus filiformis and Didymograptellus eobifidus biozones in northern Guizhou, South China. Accordingly, the interval is of mid-Floian age, rather than late Floian as previously proposed.  相似文献   

11.
    
Well-preserved internal and external moulds of a shumardiid species are described from the late Furongian (Late Cambrian) “Fengshan Formation” at Poben, Napo, southwestern Guangxi, which is close to the type locality of Shumardia orientalis, the type species of Eoshumardia. All features observed on the internal moulds indicate that the new material is definitely S. orientalis, whereas the morphology of the external moulds indicates that S. orientalis should be referred to Koldinioidia. The change of generic assignment of the type species means that Eoshumardia is a junior synonym of Koldinioidia.  相似文献   

12.
陈世乐 《神州》2012,(6):357-357
学生的学习积极性顺利完成学习任务的心理前提。而学习积极性又是学习动机伴随学习兴趣形成的,第斯多惠说:“教学的艺术不在于传授的本领,而在于激励、唤醒、鼓舞。”教学实践证明,精心创设各种教学情境,能够激发学生的学习动机和各种好奇心,培养学生的求知欲望,调动学生思维活动的积极性和自觉性,促使学生为问题的解决形成一个合适的思维意向。以下是我在数学课堂教学中的尝试。  相似文献   

13.
高连保 《神州》2012,(6):260-260
数学是一切科学之母”,它是一门研究数与形的科学,它无处不在。要掌握技术,先要学好数学,想攀登科学的高峰,更要学好数学;“教学是锻炼思维的体操”,数学的重要性不仅仅是它蕴合在各个知识领域之中,而且更重要的是,它能很好地锻炼人的思维,有效地提高能力。而能力(理解能力、分析能力、运算能力)则是关系到学习效率的最重要的因素。我们常可以看到这种现象:一次大型考试结束.数学成绩的排队往往和总成绩的排队大体相当。  相似文献   

14.
《学刊》总第九十期《叠山公祠堂记》点校多误。提出订正意见.以便读作为资料使用。  相似文献   

15.
Sánchez Botero, C.A., Oboh-Ikuenobe, F.E. & Macphail, M.K., 2013. First fossil pollen record of the Northern Hemisphere species Aglaoreidia cyclops Erdtman, 1960 in Australia. Alcheringa 37, 1–5. ISSN 0311-5518.

Aglaoreidia cyclops Erdtman, 1960 is a fossil pollen species associated with upper Eocene to lower Oligocene freshwater deposits in Europe and North America. Specimens preserved in upper Eocene lignites near Norseman, Western Australia, are the first record of this Northern Hemisphere species both in Australia and the Southern Hemisphere. This new report widens the biogeographic distribution originally considered for this species. The stratigraphical and environmental characteristics of A. cyclops also make it an excellent stratigraphic indicator of upper Eocene freshwater deposits in Western Australia.

Carlos A. Sánchez Botero [casmwc@mail.mst.edu], Francisca E. Oboh-Ikuenobe [ikuenobe@mst.edu] Department of Geological Sciences and Engineering, Missouri University of Science and Technology, 129 McNutt Hall, Rolla, MO 65409, USA; Mike Macphail [mike.macphail@anu.edu.au] Department of Archaeology and Natural History, College of Asia and the Pacific, Australian National University Canberra, ACT 0200, Australia. Received 12.10.2012; revised 6.3.2013; accepted 7.3.2013.  相似文献   

16.
17.
大洪山南麓发现的史前遗存不仅数量多、保存好,而且价值高、影响大,是国内外学界广泛关注的探讨中华文明进程的重要热点区域之一.2008年,通过大洪山南麓以石家河为中心的区域进行的系统调查显示,在约150平方公里的区域内集中分布73处史前遗址,我们选择文化堆积单纯的遗址作为基本参数分析聚落规模级差,进一步丰富了我们对于该区域聚落形成发展及变化的认识,并借此加深对大洪山南麓以石家河为中心的史前聚落的数量、规模、年代、文化内涵、分布及其关系等方面的认识,提供分析以石家河古城为核心的聚落形成与发展过程的基础性资料,进而推动该区域文明进程的研究.  相似文献   

18.
Abstract

Although four American Presidents have been assassinated (Lincoln, Garfield, McKinley, Kennedy), only the assassins of Garfield (Charles Julius Guiteau) and McKinley (Leon Franz Czolgosz) were tried, convicted, and executed for their crime. In 1882 Edward Charles Spitzka, a young New York neurologist with a growing reputation as an alienist, testified at the trial of Guiteau. He was the only expert witness who was asked, based on his personal examination of the prisoner, a direct question concerning the mental state of Guiteau. Spitzka maintained the unpopular view that Guiteau was insane. In spite of aggressive and spirited testimony on Spitzka's part, Guiteau was convicted and hanged. However, even before the execution it was acknowledged, by some experts, that Spitzka was undoubtedly right. About 20 years later, in 1901, Edward Anthony Spitzka, the son of Edward Charles Spitzka, was invited to conduct the autopsy on Czologsz, the assassin of McKinley. At the time Spitzka the younger, who had just published a detailed series of papers on the human brain, was in the fourth year of his medical training. It was an unusual series of fortuitous events that presumably led to Edward A. Spitzka conducting the autopsy on the assassin of the President of the United States while still a medical student. This, in light of the fact that other experts were available. Each Spitzka went on to a career of note and each made a number of contributions in their respective fields. It is however, their participation in the ‘neurology’, as broadly defined, of the assassins of Presidents Garfield and McKinley that remains unique in neuroscience history. Not only were father and son participants in these important events, but these were the only times that assassins of US Presidents were tried and executed.  相似文献   

19.
20.
苏凤捷 《史学月刊》2004,13(4):55-62
马克思<〈政治经济学批判〉序言>所集中表述的唯物史观基本原理,主要得之于对资本主义经济制度的研究.当代资本主义的重大发展变化,为唯物史观的发展提供了巨大的理论空间;社会经济形态演进的几个时代,大体是西欧的历史实际,将其应用于不同地区和国家历史的研究,同样为唯物史观的发展提供了理论空间;"经验的事实"和"历史环境条件",既决定了在生产力发展水平没有重大不同前提下不同地区和国家社会经济形态的不同存在,又对生产力的发展具有决定性的影响.  相似文献   

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