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Sixteen liverwort specimens collected from the Lower Cretaceous Yixian Formation of Huangbanjigou Village, Liaoning Province, China are studied in this work. The plants are thalloid and preserved in brown arenaceous mudstone as impressions. Based on examinations, the liverworts are assigned to two new genera and five new species: Riccardiothallus palmata sp. nov., Pallaviciniites stricta sp. nov., Pellites latithallus gen. et sp. nov., Conocephalumites hexagonites gen. et sp. nov. and Metzgerites multifidus sp. nov., belonging to five families and five genera. The fossil research indicates that the divergence of families, Aneuraceae and Metzgeriaceae, Pallaviciniaceae and Hymenophytaceae, Pelliaceae and Fossombroniaceae, was in the Lower Cretaceous (125 Ma). The research provides significant additions to the fossil liverwort records in Western Liaoning and offers fossil evidence for studying the classification and evolution of extant liverworts. 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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New Fossil Palaeontinids from the Middle Jurassic of Daohugou,Inner Mongolia,China (Insecta,Hemiptera) 总被引：2，自引：1，他引：1
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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A New Genus of Fossil Cycads Yixianophyllum gen. nov. from the Late Jurassic Yixian Formation, Western Liaoning, China 总被引：2，自引：2，他引：0
ZHENG Shaolin LI Nan LI Yong ZHANG Wu BIAN Xiongfei Shenyang Institute of Geology Mineral Resources Ministry of Land Resources Shenyang Liaoning Botanical Gardens of Xianhu Shenzhen Guangdong 《《地质学报》英文版》2005,79(5):582-592
A new genus of fossil Cycads, Yixianophyllum gen. nov., is reported here. The specimens were collected from the southern hill of Jinjiagou village, Toudaohezi Town, Yixian County, western Liaoning Province, China. The fossil plant-beating bed belongs to the lower part, the Zhuanchengzi bed, of the Upper Jurassic Yixian Formation （Yixianian）. The new genus in leaf shape, venation and epidermal structure shows a transitional form between Mesozoic Cycads （Ctenis, Nilssonia） and modem Cycads （Stangeria and Encephalartos）. Since the features of these specimens differ from any known genera of Cycads, a new generic name Yixianophyllum is proposed for these leaves. Typical species, Yixianophyllum jinjiagouense gen. et sp. nov. is described here. A supposed evolutionary tendency of Cycadean leaf-forms with Taeniopteris-type is discussed. 相似文献
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A new earwig genus with a new species, Cylindopygia falcata gen. et sp. nov., is described and illustrated based on two well-preserved, nearly complete female specimens from the Lower Cretaceous, Yixian Formation in Huangbanjigou, Liaoning Province, China. C. falcata is assigned to Pygidicranidae mainly due to the following characters: head obtuse-triangular with posterior margin straight, abdomen robust, subcylindrical and densely setose, and femora compressed and carinate. The new finding represents the earliest fossil record of Pygidicranidae and the first record of Pygidicranidae in China. 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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在我国云南省晋宁县梅树村地区下寒武统发现了颗石藻化石,计有两个新属四个新种:微细管碟星藻属(新属)(Microtubediscoaster gen.nov.)包括昆阳微细管碟星藻(新属新种)(Microubediscoaster kunyangensis gen.et sp.nov.)和蜂巢微细管碟星藻(新属新种)(Microtubediscoaster honeycomb gen.et sp.nov.);始四枝碟星藻属(新属)(Eotetralithus gen.nov.)包括银杏叶始四枝碟星藻(新属新种)(Eotetralithus ginkgolabulatus gen.et sp.nov)和管柱始四枝碟星藻(新属新种)(Eotetrailthustube Pillar gen.et sp nov.).下寒武统的颗石藻化石是迄今为止世界各国已报道的最老的颗石藻化石。 相似文献
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A new genus and new species, Longilanceolatus tenellus gen. et sp. nov., is described and assigned to the tribe Vetanthocorini of the fossil family Vetanthocoridae. In addition, a new species, Curvicaudus spinosus sp. nov., is also described. All specimens were collected from the Lower Cretaceous of the Yixian Formation at Huangbanjigou, Chaomidian Village, Beipiao City, Liaoning Province, northeastern China. Body size, ovipositor length, abdomen length, and other characters of eleven genera from the Middle Jurassic to Eocene are summarized. Comparison of body size of all specimens in the Vetanthocoridae and Anthocoridae (sensu lato) indicate a general trend toward smaller body size through their evolution. Moreover, Longilanceolatus, with uniquely long ovipositor, is related to a different type of oviposition compared with extant flower bugs. 相似文献
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从西藏西北部阿里地区日土县多玛乡台错古湖沉积物中获得的硅藻新化石种Mastogloia tibetica(sp．nov．)，是首次在西藏地区Mastogloia属中确立的新种，该化石种的发现在分类学上具有重要意义，文中对该化石种盐度的适应性和与其他硅藻的相似性进行了讨论，并结合沉积物的化学分析结果，讨论了新种具有适应高渗透性的微咸水至咸水环境的习性，对今后未发现的古湖沉积物的古生态研究有着重要的参考意义。 相似文献
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New fossil genus with a new species, Stellularis longirostris Chen, Yao and Ren, gen. et sp. nov., from the family Procercopidae, are described. New specimens were collected from the Lower Cretaceous non-marine sedimentary strata from the Yixian Formations of northeast China. The exceptionally well-preserved materials reveal fine details of the body structure and morphology including rostrum, legs, abdomen, anteclypeus and ovipositor. The genera Luanpingia Hong, 1983 and Cathaycixius Ren, Lu, and Guo, 1995 are discussed. 相似文献
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In this paper one new genus and three new species Bellimordella capitulifera gen. et sp. nov., B. longispina gen. et sp. nov., B. robusta gen. et sp. nov., all placed within the subfamily Praemordellinae of the family Mordellidae, are described and illustrated. The specimens were recovered from the Yixian Formation of Beipiao City, Liaoning Province, NE China. The key to the species of this new genus is given. Furthermore, we discuss evolution of the pygidium and possible food for those ancient mordellids. 相似文献
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New Fossil Beetles of the Family Ommatidae （Coleoptera： Archostemata） from the Jehol Biota of China 总被引：2，自引：2，他引：0
TAN Jingjing REN Dong SHIH Chungkun GE Siqin 《《地质学报》英文版》2006,80(4):474-485
A new genus with one new species and five new species of genus Amblomma of fossil ommatids are described and illustrated： Euryomma tylodes gen. et sp. nov., Amblomma cyclodonta sp. nov., Amblomma miniscula sp. nov., Amblomma porrecta sp. nov., Amblomma eumeura sp. nov., and Amblomma protensa sp. nov. All of them were collected from the Upper Jurassic or Lower Cretaceous Yixian Formation of western Liaoning, China. A key to the species of Amblomma is given. The wide epipleural space shows that Euryomma may be a primitive genus in Ommatidae. Many different species of Amblomma occurred within the same sedimentary horizon in this area could be environmental changes caused by frequent volcanic activities during the deposition of the Yixian Formation. 相似文献
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热河生物群中蜘蛛和蟹奴化石几个新种 总被引：1，自引：0，他引：1
由于蜘蛛身体表面所覆盖的体壳较薄，通常保存为化石的几率较小，因此，蜘蛛化石是一类较为稀有的化石。热河生物群中的蜘蛛化石迄今尚未进行过系统描述。本文报道了属于Araneidae Leach，1819(园蛛科)、Gnaphosidae(平腹蛛科)和Theidiidae Sundeva1833(球腹蛛科)6个蜘蛛新种：Araneus liaoxiensis sp．nov．，A．aethus p．nov．，A．reheensissp．nov．，A．beipiaoensis sp，nov．，Gtuzphosq liaoningensiss p．nov．和Theridion atalus sp．nov．；以及蟹奴幼虫的一个化石新属种Mesosacculina papposa gen．etsp．nov．。这些化石均采自辽西北票黄半吉沟义县组下部(晚侏罗世-早白垩世)。 相似文献
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New Mesozoic Mesopsychidae(Mecoptera)from Northeastern China 总被引：2，自引：2，他引：0
<正>The Mesozoic family Mesopsychidae Tillyard,1917 presently consists of seven described genera and 13 species from the mid-Triassic to the Early Cretaceous of Australia,South Africa and Eurasia.In the present paper one new genus and three new species of fossil mesopsychids are described that add significant distributional and stratigraphic extensions to the family.This finding documents the first formal record of fossil Mesopsychidae in China.Both Lichnomesopsyche gloriae gen.et sp.nov.and L.daohugouensis gen.et sp.nov. were found from the Middle Jurassic Jiulongshan Formation of Inner Mongolia,whereas Vitimopsyche kozlovi sp. nov.,of mid Early Cretaceous age,was collected from the Jehol Biota of northern Hebei Province.This new,well-preserved material from China reveals complete and previously unknown body features,including head, antennae,mouthparts,legs and abdomen.The delicate and long proboscides of these new taxa indicate that they were feeding on externally exposed,nutrient-rich fluids of gymnospermous ovulate fructifications,and incapable of piercing surface epidermis-attributable principally to the absence of stylets.These proboscides originated, perhaps multiply,among basal Mecoptera and are functionally and structurally convergent with equivalent mouthparts borne by fossil and extant Diptera,Lepidoptera,Neuroptera and Coleoptera. 相似文献
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Two new Early Cretaceous fossil rove beetle species, Paleosiagonium brevelytratum n. gen. n. sp. and Paleosiagonium adaequatum n. gen. n. sp. are described from the Lower Cretaceous Yixian Formation of Liaoning Province, China. They are clearly placed in the extant Piestinae according to the following characters: body elongate and flat; anterior coxae small and globose; abdomen long and parallel-sided, with six visible sterna and one pair of paratergites on segments III–VII. This is the first report on the occurrence of the coleopteran subfamily Piestinae in the fossil record. The new discoveries indicate that Piestinae have originated at least by the Early Cretaceous, at about 125–120 Ma. 相似文献
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记述了原长翅亚目化石（Protomecoptera Tillyard,1917）在中国陕西铜川中三叠统中的首次发现,填补这个亚目化石在中国的空白.根据脉序特征,确定是2个新属、种：Glytochorista martynovae gen.et sp.,Phyllochorista orientis gen.et sp.nov.,属这个亚目的汤姆蝎蛉科Tomichoristidae O.Martynova,1958,从而将这个科的化石推向最高层位,即从早二叠世推向中三叠世,跨时5000多万年.从这个意义来讲,对研究该科从古生代晚期向中生代早期的演化有一定的重要参考价值.化石采自铜川中三叠世铜川组下段上部灰绿色泥页岩.新属、新种属于陕西昆虫群（系中三叠世陕西动物群或陕西生物群的一个化石门类）铜川昆虫组合的新成员,时代相当于欧洲拉丁尼期（Ladinian stage）. 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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A New Cockroach Genus of the Family Fuziidae from Northeastern China (Insecta: Blattida) 总被引：1，自引：0，他引：1
A new genus and two new species of fossil Fuziidae are described and illustrated: Parvifuzia gen. nov., P. marsa sp. nov. and P. brava sp. nov.. Both species were collected from the Middle Jurassic Jiulongshan, Formation of Daohugou, Inner Mongolia of China. In conjunction with Fuzia Vr?ansky, Liang et Ren, 2009, the present findings allow us to demonstrate that members of the family were morphologically diverse, with body length ranging from medium (17 mm) in Fuzia to small (9.7 mm) in the present genus. Wing venation of F. dadao is complicated, but simple in the present species, and apex of male’s cerci are sharp and forceps-like in F. dadao, but strongly curved inward and round in the new genus. 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