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陈耕普!辽宁锦州市古塔区宜昌路三段-号 《化石》2001,(2)
我是新的化石爱好者。收藏化石不到一年时间。但有幸身处辽西化石产地 ,得天独厚 ,因而收集了一些化石标本。《化石》使我学到了不少知识。现赋诗一首 :凝固瞬时间 ,形成上亿年。千姿鱼戏水 ,百态鸟冲天。昂首恐龙绝 ,缩头龟鳖延。新生随旧天 ,化石解从前化石@陈耕普!辽宁锦州市古塔区宜昌路三段42-9号 相似文献
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曾被命名为中国猿人北京种(Sinanthropus pekinensis)的直立人北京种(Homo erectus pekinensis)(北京人)化石是当时世界上具有最为可靠发掘记录的古人类化石。1941年大部分北京人化石丢失,仅存的当时发掘出土具有鉴定价值的人类化石为保存在瑞典乌布萨拉大学古生物博物馆的3枚北京人牙齿。2011年在瑞典乌布萨拉大学古生物博物馆保存的周口店发掘出土的化石中新发现了一枚北京人牙齿化石。本文报道了这枚新发现的北京人牙齿化石并回顾了此前发现的3枚北京人牙齿化石的历史。这4枚人类牙齿化石代表了在周口店最早发现了的直立人牙齿化石。 相似文献
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湖北郧县猿人牙齿化石 总被引:2,自引:0,他引:2
<正> 1975年夏,中国科学院古脊椎动物与古人类研究所一野外队在湖北省郧县调查脊椎动物化石时,在该县梅铺公社杜家沟一农民家里保存的化石中发现了由龙骨洞出土的人的门齿化石一枚。同年5—7月、9—11月间,许春华等赴龙骨洞作了两次发掘,又获人类牙齿化石三枚,同时还发现了一件人工打击痕迹清楚的石核及20多种共生的哺乳动物化石。 相似文献
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广东南雄、始兴,江西赣州的蛋化石 总被引:13,自引:4,他引:9
古脊椎动物与古人类研究所在1962—1963和1963—1964两个季度在广东南雄、始兴一带工作时,除发现大批的新生代初期化石外,还在南雄层中发现了一些恐龙化石和龟化石等。但最多的发现还是蛋化石。关于这一地区的这些化石采集和分布情况,已有初步报导(张玉萍、童永生1963)。第二季度的工作对前一季度作了一些补充,就蛋化石的分布与保存情况看,增加不多。但是两个季度的工作,可以使我们对于这一地区的蛋化石有了基本的了解,代表着迄今为止所知道的关于蛋化石最丰富的地区。 相似文献
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辽宁早白垩世早期—鸟化石 总被引:3,自引:1,他引:2
本文记述了发现于辽宁朝阳地区早白垩世早期一新的鸟类。这是继三塔中国鸟(Sinornis santensis)、燕都华夏鸟(Cathayomis yandica)之后报道的辽宁中生代第三种鸟化石,它的脊柱和腰带与始祖鸟和恐龙相似,但其肋骨又具有现代鸟类的性状,这是早期鸟类化石的又一新材料。 相似文献
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侏罗纪的蛇颈龙类化石主要发现于欧洲 ,在世界的其他地区则比较少见。亚洲的蛇颈龙化石 ,尤其是侏罗纪的属种大多破碎而难以鉴别 (Sato,1 998)。到目前为止 ,Bishanopliosaurusyoungi(Dong,1 980 )和Yuzhoupliosauruschengjiangensis(Zhang,1 985)是亚洲地区最为完整的侏罗纪蛇颈龙类化石 ,并且化石产自对于蛇颈龙而言比较罕见的淡水沉积 ,因此这些材料对于了解该类群的系统发育、历史动物地理和古生态来说非常重要。本文重新详细描述了采自中国重庆自流井组东岳庙段的杨氏璧山上龙2 ) (董枝明 ,1 980 )。愈合情况不好的椎体和椎弓以及耻骨的边缘形态表明 ,杨氏璧山上龙的正型标本是一个幼年个体的头后骨架。我们的研究表明杨氏璧山上龙主要依分叉的荐肋为特征 ,而这一性状在初次发表时作为颈肋特征被描述。璧山上龙的其他特征包括侧扁的神经棘以及狭窄的乌喙骨和肱骨上有一个突。经过重新修理的标本显示 ,坐骨和耻骨相对的面呈沟槽状 ,这一现象表明它们之间的接触关系要较原来描述的情况复杂 ,是一种依靠软骨的连接 ,而非直接接触。本文对杨氏璧山上龙的腰带部分进行了重新复原。O’Keefe (2 0 0 1 )的支序分析支持将Plesiosauria二分为Plesiosauroidea和Pliosauroidea,后者包含两个科 :Pliosauridae和 相似文献
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Peleg S Dar G Medlej B Steinberg N Masharawi Y Latimer B Jellema L Peled N Arensburg B Hershkovitz I 《American journal of physical anthropology》2007,133(3):967-977
Discovering the nature of sacral orientation is of considerable anthropological importance. Therefore, this study aims at presenting a new anthropologically based definition for sacral anatomical orientation (SAO) angle, establishing standards of SAO for human population; examining the relationship between pelvic incidence (PI) and SAO; and associating SAO with demographic parameters. The study population consisted of 424 adult and 14 sub-adult (13-18 years, for SAO only) pelvises. Sacral orientation was measured using two different definitions: a) SAO is the angle created between the intersection of a line running parallel to the superior surface of the sacrum and a line running between the anterior superior iliac spine (ASIS) and the anterior-superior edge of the symphysis pubis; b) PI is the angle created between the perpendicular to the sacral plate at its midpoint and the line connecting this point to the middle of the axis of the acetabulum. SAO was measured using a specially designed mechanical measurement tool and a 3D digitizer. PI was measured via the 3D digitizer. The methods developed by us for measuring SAO and PI in skeletal material are valid and reliable. SAO and PI measures were highly correlated (r = -0.824, P < 0.001). The average SAO was 49.01 degrees (SD = 10.16), and the average PI 54.08 degrees (SD = 12.64). SAO was independent of ethnicity and sex, yet age dependent. This study establishes a methodology for estimating SAO and PI in skeletal material and furnishes the anthropological milieu with base line data regarding these parameters. Future studies in human evolution can greatly benefit from this study. 相似文献
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四川自贡肉食龙一新种 总被引:2,自引:1,他引:1
和平永川龙(Yongchuanosaurus hepingensis sp. nov.)为四川盆地发现的又一相当完整肉食龙新材料,本文对它进行了记述. 相似文献
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Peter M. Galton 《Pal?ontologische Zeitschrift》2000,74(3):393-423
Spondylosoma absconditum (Ladinian, Middle Triassic) lacks certain Dinosauriformes-Dinosauria characters (sigmoid curve and epipophyses in neck, distally placed deltopectoral crest on humerus) and those present (accessary hyposphene-hypantra vertebral articulations, three sacral vertebrae, elongate pubis) also occur in the Rauisuchia (Crurotarsi, Suchia, Rauisuchiformes).Spondylosoma is tentatively referred to the Rauisuchidae because, as indicated by the ventrolaterally directed sacral ribs, the ilium was held obliquely (and not vertically as in the Poposauridae).Staurikosaurus pricei (Carnian, Upper Triassic), one of the oldest dinosaurs, possesses autapomorphies of Dinosauriformes, Dinosauria, Saurischia, and Herrerasauridae, but it retains certain plesiomorphic characters (subcircular distal end to tibia, ?proximally placed deltopectoral crest, axially unshortened neural spine to sacral 1, ?scapular spine unreduced distally) not present inHerrerasaurus (Carnian, Ischigualasto Formation, Argentina). However, the femur is more derived in the loss of the trochanteric shelf and reduction of the lesser trochanter (as also occurs in some prosauropods). The two vertebrae sacrum ofStaurikosaurus is a plesiomorphic character for Dinosauria (also in other herrerasaurids, German Upper Triassic prosauropodSellosaurus gracilis — ?males), to which was added either a caudosacral (e.g. Santa Maria prosauropodSaturnalia, Sellosaurus gracilis — ?females) or a dorsosacral (e.g. Ischigualasto theropodEoraptor and prosauropodRiojasaurus). Agrosaurus (Upper Triassic, Durdham Down, England — not Australia) is not a herrerasaurid; it is referred to the prosauropod dinosaurThecodontosaurus antiquus (Upper Triassic, Durdham Down). 相似文献
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四川自贡大山铺蜀龙动物群——简报Ⅳ.兽脚类 总被引:2,自引:0,他引:2
建设气龙 (Gasosaurus constructus gen. et sp. nov.) 为自贡大山铺蜀龙动物群中的兽脚类—新属种.本简报对它的形态特征进行了简要的记述. 相似文献