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Frenguellia(Lycopsida)from the uppermost Devonian of West Junggar,Xinjiang Uygur Autonomous Region,NW China,and its implications on protolepidodendralean leaf morphology and paleophytogeography
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作者 Bing-Cai Liu Kai Wang +4 位作者 Rui-Wen Zong Jiao Bai Ning Yang Yi Wang Hong-He Xu 《Journal of Palaeogeography》 SCIE CSCD 2023年第2期263-277,共15页
Protolepidodendralean lycopsids are characteristic of morphologically complex leaves.Most taxa of this group are herbaceous and widely distributed in global Devonian sediments,with exceptions of a few members,such as ... Protolepidodendralean lycopsids are characteristic of morphologically complex leaves.Most taxa of this group are herbaceous and widely distributed in global Devonian sediments,with exceptions of a few members,such as Frenguellia eximia from the Lower Carboniferous of Argentina.In this study,we focus on the morphology of Frenguellia eximia and emend its generic and specific diagnoses,based on new materials from the Upper Devonian Hongguleleng Formation of West Junggar,Xinjiang Uygur Autonomous Region,Northwest China,within the fossil-bearing bed palynologically dated as a latest Famennian age.This is the first finding of Frenguellia eximia out of Gondwana.Frenguellia eximia bears planate leaf with three upward pairs of lateral tips,isomorphic sporophyll to the leaf,and elongated,oval sporangium.Leaf morphology of the members of the Order Protolepidodendrales is summarized and classified into lateral-tip and distal-tip types.Lateral-tip type leaf consists of an obvious main body and several paired lateral tips,whereas distal-tip type leaf shows a petiole and a distal lamina with several planate or three-dimensional segments.Two leaf types probably indicate two independent evolutionary routes of microphylls evolving from simple leaf of prelycopsids during the Devonian period.The new occurrence of Frenguellia eximia further shows paleophytogeographical similarities between West Junggar and northwestern Gondwana. 展开更多
关键词 Frenguellia LYCOPSID Microphyll paleophytogeography DEVONIAN Junggar Basin
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Two New Species of Eretmophyllum(Ginkgoales)from the Jurassic of Eastern Siberia
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作者 Andrey FROLOV Irina MASHCHUK 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2023年第4期1014-1025,共12页
Two new species of Eretmophyllum Thomas are described from the lower(Toarcian)and upper(Aalenian)Prisayan Formation of the Irkutsk Basin,Eastern Siberia,Russia based on distinct morphological and cuticular features of... Two new species of Eretmophyllum Thomas are described from the lower(Toarcian)and upper(Aalenian)Prisayan Formation of the Irkutsk Basin,Eastern Siberia,Russia based on distinct morphological and cuticular features of the leaves that distinguish them from other species of the genus.Eretmophyllum polypapillosum sp.nov.is characterized by the presence of 2-3 papillae on the lower and upper epidermis of ordinary cells.Taphonomically,the leaf burials of E.polypapillosum sp.nov.indicate that it preferred mesophilic forests developed on river terraces and/or low watersheds.Eretmophyllum yershowskiensis sp.nov.is represented exclusively by leaf cuticles extracted by coal maceration,and it probably inhabited the low banks of peat bogs.The presence of the genus Eretmophyllum in the Early Jurassic of France and Eastern Siberia shows that it was already widespread in the territory of Eurasia,distributed from Western Europe to Eastern Siberia.This indicates the possible existence of Eretmophyllum species elsewhere in the Early Jurassic such as Central Asia and Northwest China. 展开更多
关键词 PALEOBOTANY ginkgoalean TAXONOMY paleophytogeography PALEOECOLOGY leaf cuticles Irkutsk Coal Basin
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An Early Carboniferous Flora of the Huadu Locality from South China:Its Taxonomic Composition,Paleophytogeographical Position and Paleoecological Interpretation 被引量:3
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作者 NAUGOLNYKH Serge V. JIN Jianhua 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2014年第5期1341-1351,共11页
The Huadu flora of Guangdong Province, South China contains the lepidodendrid Lepidodendron shanyangense Wu et He, its putative rhizophore Stigmaria cf. ficoides (Brongniart) Sternberg; sphenophyte s.l. Archaeocalam... The Huadu flora of Guangdong Province, South China contains the lepidodendrid Lepidodendron shanyangense Wu et He, its putative rhizophore Stigmaria cf. ficoides (Brongniart) Sternberg; sphenophyte s.l. Archaeocalamites scrobiculatus (Brongniart) Stur; bowmanitid Sphenophyllum tenerrimum (Ettingshausen) Stur; pteridophyll Sphenopteris sp. of uncertain taxonomic position; undetermined ferns gen. et sp. nov.; lyginopterid pteridosperm Rhodeopteridium hsianghsiangense (Sze) Zhang, Zhao et Wu, a trigonocarpoid pteridosperm represented by fronds and isolated pinnules of Paripteris gigantea (Sternberg) Gothan, male fructifications of Potoniea sp., and seeds of Trigonocarpus sp. Ecologically, the Early Carboniferous (Visean) Huadu vegetation was divided into two neighboring communities: (1) a near-shore hydrophilous "community A" with predominating Archaeocalamites and Rhodeopteridium; and (2) a wet forest "community B" with predominating shrubby trigonocarpalean pteridosperm Paripteris gigantea (Sternberg) Gothan and tall tree-like lepidodendrid Lepidodendron shanyangense Wu et He. The Huadu vegetation was physiognomically similar to present-day low-latitude mangrove forest. 展开更多
关键词 Lower Carboniferous Huadu flora paleophytogeography PALEOECOLOGY GuangdongProvince South China
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Early Norian flora from Partizansk River Basin of Primorye, Russia 被引量:1
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作者 Elena B Volynets Svetlana A Schorokhova Ge Sun 《Global Geology》 2006年第1期1-12,共12页
An early Norian flora from the Partizansk River Basin of Primorye, Far-East of Russia, is described in detail for the first time, in which over 25 taxa are reported. The flora is dominated by cycadoalean, bennettitale... An early Norian flora from the Partizansk River Basin of Primorye, Far-East of Russia, is described in detail for the first time, in which over 25 taxa are reported. The flora is dominated by cycadoalean, bennettitalean and coniferous plants, associated with a lot of ferns and czekanowskialean plants, and with a few ginkgoalean. In floristic characteristics, the flora can be well comparable with Late Triassic Mongugai flora of southwestern Primorye and its neighboring Tianqiaoling flora of eastern Jilin, China, as well with the Yamanoi and Nariwa floras from southwestern Japan. As the plant-bearing strata are sandwiched in the lower Norian marine beds yielding marine fauna, the age of the Partizansk flora is well evidenced as the early Norian. Paleophytogeographically, the flora appears to be in the ecotone of the Medio-Triassic and Arcto-Triassic floristic regions in Eurasia, and indicates probably warm temperate or subtropic vegetation in nature. Four new species are reported in this paper, including Ctenis elegantus sp. nov, Ixostrobus pacificus sp. nov., Elatocladus elegantus sp. nov. and E. prynadae sp. nov. 展开更多
关键词 TRIASSIC early Norian FLORA paleophytogeography Primorye of Russia
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