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1.
笔者首次发现了内蒙古霍林河煤田霍林河组(K1h)茨康类拟刺葵属拟刺葵亚属的一个新种—内蒙古拟刺葵(Phoenicopsis(Phoenicopsis)neimengensis sp.nov.)。该新种以表皮构造下气孔式,上表皮细胞未见乳突,下表皮普通表皮细胞发育中央乳突,气孔器副卫细胞多发育乳突,孔缝不定向等特征区别于拟刺葵属已知种。新种的研究对于了解拟刺葵属(Phoenicopsis)的分类,以及恢复古地理、古气候有重要作用。 相似文献
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大量茨康类压型化石在鄂尔多斯盆地中侏罗世含煤地层延安组中被发现。本文根据叶外部形态和表皮构造特征,首次发现拟刺葵属的苦戈维尔叶亚属Phoenicopsis(Culgoweria),并建立了鄂尔多斯拟刺葵(苦戈维尔叶)(新种)Phoenicopsis(Culgowaria)ordosensis sp.nov。新种代表了该亚属在我国中侏罗世的第一个化石记录,为研究其地质、地理分布提供了新的证据,也为研究该类植物在欧亚大陆中侏罗世的多样性增添了新内容。 相似文献
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A New Genus and Species of Damsel-Dragonfly (Odonata: Isophlebioidea: Campterophlebiidae) in the Middle Jurassic of Inner Mongolia, China 总被引：1，自引：0，他引：1
The campterophlebiid new genus and species Ctenogampsophlebia reni is described from the Middle Jurassic of Inner Mongolia, China. It shows close similarities with the Lower to Middle Jurassic genera Gampsophlebia, and Petrophlebia, with closed and short subdiscoidal cells, confirming the attribution of these two other genera to the Campterophlebiidae. 相似文献
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Two new species, Cretolimonia excelsa sp. nov. and Mesotipula gloriosa sp. nov., in Limoniidae of Diptera are described and illustrated, based on three fossil specimens with bodies and complete wings. These specimens were collected from the latest Middle Jurassic Jiulongshan Formation at Daohugou, Inner Mongolia, China. These are the first fossil records of these two genera from China. 相似文献
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Conifers are common in the Lower Cretaceous Zhonggou Formation of Jiuquan Basin, Gansu Province, NW China. The excellent preservation of plant fossils allows detailed investigations of the leaf epidermis by light microscope (LM) and scanning electron microscope (SEM). Based on the leaf morphology and epidermal features, two Brachyphyllum species, B. ningshiaense and B. obtusum are described. They closely resemble one another in foliar morphology and epidermal features, but have different leaf apices, cuticle features, stomatal shape and the number of subsidiary cells. The specimens consist of leafy axes with imbricate, spirally arranged, scale-like leaves. Epidermal analysis shows rectangular, pentagonal or rhomboidal unspecialized epidermal cells and abaxially longitudinally arranged stomatal rows except for the marginal areas, as well as well-developed papillae, sunken stomata and Florin rings of subsidiary cells with papillae on the inner surfaces. The imbricate and spirally arranged leaves with rather thick cuticle in both species indicate an Araucariaceae (Araucaria) or Cheirolepidiaceae affinity. However, epidermal features and the presence of Classopollis pollen in the sediments indicate a cheirolepidiaceous affinity. The morphological and anatomical characters of both taxa are interpreted as adaptations to a warm seasonally and temporarily dry palaeoclimate. 相似文献
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Diverse caddis flies are recently collected from the Middle Jurassic Daohugou fauna in Ningcheng County, Inner Mongolia, northern China, and different types of caddis cases have been reported in the same locality. A new species of caddisfly, Liadotaulius daohugouensis sp. nov. is described and illustrated; the establishment is based on a well-preserved isolated forewing collected from the Middle Jurassic Jiulongshan Formation of Daohugou. The family status of Liadotaulius is discussed on the basis of new material and is referred to the family Philopotamidae. The Daohugou fauna continues to provide new data for studying the early evolution of Trichoptera. 相似文献
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中国中生代的两栖类化石十分稀少,已报道的有尾两栖类仅见产于河北丰宁县凤山炮樟沟晚侏罗世的东方塘螈(Laccotriton subsolanus)、凤山中华螈(Sinerpeton fengshanensis)、辽宁葫芦岛市水口子早白垩世的钟健辽西螈(Liaoxitriton zhongjiani)、内蒙古宁城道虎沟地区中侏罗世的天义初螈(Chunerpeton tianyiensis)和奇异热河螈(Jeholotriton paradoxus),以及辽西早白垩世热河生物群中的无尾两栖类葛氏辽蟾(Liaobatrachus grabaui)、三燕丽蟾(Callobatrachus sanyanensis)北票中蟾(Mesophryne beipiaoensis)。本文记述了一件采自内蒙古宁城道虎沟地区中侏罗世的蝌蚪化石,这在中国乃至亚洲尚属首次报道,不仅填补了中国中侏罗世无尾两栖类化石分布的空白,而且进一步丰富了燕辽生物群的内容,对早期蛙类的地理分布、形态发生、生存环境等研究具有重要的科学价值。 相似文献
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Four new species of three genera in the family Cimbrophlebiidae, Telobittacus decorus sp. nov., Bellicimbrophlebia heteroneura sp. nov., Cimbrophlebia amoena sp. nov., and Cimbrophlebia gracilenta sp. nov., are described and illustrated based on eleven well-preserved fossil specimens. These specimens were collected from the latest Middle Jurassic Jiulongshan Formation of Daohugou, Inner Mongolia, China. This is the first record of the genus Cimbrophlebia in the Jurassic extending its age from the Lower Cretaceous to the Middle Jurassic. Due to same venational characters, we propose that an undescribed fossil specimen of Cimbrophlebiidae from the Jurassic of Germany is attributed to C. gracilenta sp. nov. Our new findings demonstrate an evolutionary trend of venational change from 185 to 50 Ma that the level of the bifurcation of Rs is gradually moving toward the base of wing in reference to the bifurcation of M. 相似文献
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Two new species of wasps belonging to the family Ephialtitidae,Praeproapocritusflexus sp.nov.and Proapocritus parallelus sp.nov.,from the Middle Jurassic Jiulongshan Formation of southeastern Inner Mongolia,China,are described and illustrated.Praeproapocritus vulgates Rasnitsyn ＆ Zhang,2010 and six species of Proapocritus,P.densipediculus,P.sculptus,P.longantennatus,P.formosus,P.atropus,and P.elegans,all described by Rasnitsyn and Zhang in 2010,are first record from the Middle Jurassic of China.These two new findings supplement the morphological understanding of ephialtitids in the Middle Jurassic of China and broaden the diversity of ephialtitids in their by-gone ecosystems. 相似文献
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吐哈盆地北缘中侏罗世植物化石稳定碳同位素的古环境意义 总被引：2，自引：1，他引：1
新疆吐哈盆地北缘三道岭煤田中侏罗统西山窑组的植物化石属于Coniopteris-Phoenicopsis植物群的典型组合。从该植物群中挑选出优势属种,分别为似银杏、拟刺葵、枝脉蕨以及斯堪尼狭轴穗,对其进行稳定碳同位素分析。前3种为叶片化石,它们的δ13C值分布在-21.66‰~-23.83‰,属于典型的C3植物。最后一种为繁殖器官化石,其δ13C值为-20.91‰,比叶片的值高。将δ13C值根据公式转换为大气CO2的δ13Ca值,发现基于银杏类叶片获得的现代和中侏罗世的δ13Ca值与其他方法获得的值相似。这说明银杏类叶片是重建地质历史时期δ13Ca的一类可靠植物,为今后研究中生代-新生代δ13Ca变化提供了一个简便而可行的方法。Ci/Ca比值是一重要的植物生理生态特征值,因此进一步将银杏类化石叶片的δ13C值换算成Ci/Ca。化石似银杏的Ci/Ca值为0.6,而现生银杏的Ci/Ca为0.63,二者相似。虽然三道岭地区中侏罗世的CO2浓度约为现在的4.5倍,但是化石和现生银杏类植物的Ci/Ca值仍然保持恒定,表明银杏植物的气孔参数对CO2变化比较敏感,是重建古CO2浓度的良好指示植物。这也为判断一种植物能否用来重建古CO2浓度提供了一种简便而有效的检测方法。 相似文献
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Xiangdong Zhao Xianye Zhao Lei Chen Qi Zhang Bo Wang 《Proceedings of the Geologists' Association. Geologists' Association》2019,130(6):691-695
The Eomeropidae is a species-poor family with only 11 known fossil species from the Early Jurassic to Palaeogene. A new species of fossil eomeropid, Tsuchingothauma gongi sp. nov., is described based on a well-preserved wing from the Middle Jurassic Daohugou deposits of Inner Mongolia, China. Our new species is distinguished from the type species T. shihi mainly in having very numerous crossveins and cells; more longitudinal veins: 13 and 11 terminal branches in radial sector and medial field, CuA with 3 terminal branches and A with 7 terminal branches. 相似文献
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新疆沙尔湖煤田中侏罗统西山窑组产出大量茨康类植物化石.通过选取4块狭叶拟刺葵Phoenicopsis angustifolia Heer化石作为研究对象,在详细揭示其角质层微细构造、统计气孔参数并测定其碳同位素组成的基础上,定量重建研究区中侏罗世早期阿林期至巴柔期古大气CO2浓度、古温度、古海拔高度,测算该植物的水分利用率.结果表明,狭叶拟刺葵平均气孔指数值5.90%,基于气孔比率法获得的古大气CO2浓度为（1240.16±122.75）×10-6,该值处于GEOCARB Ⅲ碳平衡模型可信误差范围内.测得植物化石角质层碳同位素δ13Cp平均值-23.07‰,计算出该植物水分利用效率272.06 mmol/mol,重建沙尔湖中侏罗世早期平均温度16.8~20.7℃,古海拔高度196.7 m.整体而言,新疆沙尔湖地区在中侏罗世早期属于一种高CO2浓度、气候温暖湿润的环境. 相似文献
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The Axymyiidae is one of the small families of the suborder Nematocera within the Diptera.Up to date,three genera and seven species of extant axymyiids have been described from the Holarctic Region,including Canada,China,Hungary,Japan,Russia,and USA,with three genera and three species of fossil taxa described from the Middle Jurassic of Daohugou,northeastern China.A new genus Raraxymyia gen.nov.and two new species,R.parallela and R.proxima gen.et sp.nov.from the Middle Jurassic Jiulongshan Formation of Daohugou Village,Inner Mongolia,China,are herein described based on their well-preserved wings and body characters.A revised key to the genera of axymyiids is provided. 相似文献
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A new genus and species of fossil elaterid namely Clavelater ningchengensis gen. et sp. nov. assigned to the subfamily Protagrypninae based on one specimen from the Middle Jurassic Jiulongshan Formation near Daohugou Village, Ningcheng County, Inner Mongolia, northeastern China is described and illustrated. This specimen displays a pair of large antennae that easily differs from those of most Mesozoic elaterids. There are around 36 species within 20 genera referred to elateroids described from the Early Jurassic to Miocene of China, with another three species within three genera reviewed, but the taxonomic assignment of at least seven species within three genera is doubted. The systematic position of fossil elateriform beetles reported from China is reviewed and the evolution of Mesozoic elateroids briefly discussed. 相似文献
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Two new genera and species of fossil Palaeontinidae are described from Daohugou Village, Inner Mongolia.China:Cladocossus undulatus gen.et sp.nov.and Cricocossus paradoxus gen.et sp. nov.Both new genera are described based on well-preserved forewings.This discovery confirms the high diversity of palaeontinids during the Middle Jurassic.Both specimens have interesting modal structures which are new to Palaeontinidae:M five-branched and M3 with two branches.Based on this character,wing structural characteristic is discussed. 相似文献
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Three new species of the extinct genus of Eoptychopterina from the Eoptychopteridae family, Eoptychopterina antica sp. nov., Eoptychopterina adnexa sp. nov., and Eoptychopterina mediata sp. nov., are described and illustrated. These three new species are established based on fossil specimens with bodies and complete wings. All were collected from the Middle Jurassic Jiulongshan Formation of Daohugou in eastern Inner Mongolia, China. Based on the new materials, the name of two species in Eoptychopterina from China--Eoptychopterina elenae Ren and Krzeminski and Eoptychopterina gigantea Zhang--is sysnonymum junius. 相似文献
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首次报道了产于内蒙古锡林浩特盆地侏罗系红旗组的植物群,共计21属37种。该植物群由木贼目、真蕨纲、苏铁纲、银杏纲、松柏纲和少量分散保存的种子等组成,以真蕨类丰富、蚌壳蕨科Coniopteris和Eboracia出现以及南方型分子较多等为特征。该植物群的时代为早侏罗世晚期,反映研究区红旗组主体的沉积时代为早侏罗世晚期,上部沉积可能形成于中侏罗世早期。气候敏感植物,特别是南方型分子的出现,指示锡林浩特盆地早侏罗世晚期属于暖温带—亚热带气候区,气候较热或短期有一定程度的偏干旱;其气温较早侏罗世早期和中侏罗世早期更高,说明早侏罗世晚期发生过1次升温气候事件。对早、中侏罗世植物群和沉积特征的综合分析表明,中国在早侏罗世晚期可划分出黑龙江东部温凉气候区、北方暖温带温暖潮湿气候区、中部热带—亚热带半干旱—半潮湿气候区、中南热带—亚热带干旱气候区和西藏—滇西热带干旱气候区共5个气候区,其中北方暖温带温暖潮湿气候区与中部热带—亚热带半干旱—半潮湿气候区的界线较早侏罗世早期和中侏罗世早期偏北4°～8°(纬度),亦说明早侏罗世晚期发生了升温事件。此升温事件与中亚和西伯利亚的图阿尔期升温事件相当,其很可能是早侏罗世晚期图阿尔期大洋缺氧事件(T-OAE)在陆地生态系统中的响应。 相似文献
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Middle Jurassic Coptoclavidae (Insecta:Coleoptera:Dytiscoidea) from China:a Good Example of Mosaic Evolution 总被引：2，自引：2，他引：0
<正>Adults of the aquatic coptoclavid beetles(Coleoptera:Adephaga:Dytiscoidea),described from four Middle Jurassic fossil localities in Inner Mongolia and Liaoning in northeastern China,are attributed to Daohugounectes primitives Wang,Ponomarenko and Zhang,2009,which was previously proposed after study of larvae.The generic name Timarchopsis Brauer,Redtenbacher and Ganglbauer,1889 is proposed as a substitute for the preoccupied and junior homonym Necronectes Ponomarenko,1977,non Milne-Edwards,1881. Furthermore,the subfamily name Necronectinae Ponomarenko,1977 is substituted by the available name Timarchopsinae.Daohugounectes is placed into Timarchopsinae because its adults have long,slightly apically widened tibiae and small femoral plates.The adults of this genus differ from those of other Timarchopsinae in the following features:antennae short and widened in the middle part;basal segments of protarsi not cut apically; metaventrite with a triangular plate.The larvae look like somewhat primitive forms in the subfamily Timarchopsinae.In contrast to these primitive larvae,the adults with some advanced characters can be regarded as among the most advanced forms in the subfamily Timarchopsinae,and probably represent a transition between the Timarchopsinae and Charanoscaphinae.Such mosaic evolution within Daohugounectes indicates that the evolutionary process of aquatic beetles is far more complex than previously thought. 相似文献