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Thereis Y S Choo - One of the best experts on this subject based on the ideXlab platform.
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assessing the evolutionary history of the fern family Dipteridaceae gleicheniales by incorporating both extant and extinct members in a combined phylogenetic study
American Journal of Botany, 2018Co-Authors: Thereis Y S Choo, Ignacio H EscapaAbstract:PREMISE OF THE STUDY Dipteridaceae is a lineage of ferns that has existed from the early Mesozoic and is known for its extensive fossil record. By integrating information from all described extant and extinct genera into a single phylogenetic study, this paper aims to examine the taxonomy of the group on a whole and explore character evolution within the lineage across time. METHODS A morphological matrix of 51 characters was developed for 72 species (43 extinct and 29 extant) based on published information. Morphological characters were combined with nucleotide sequences for four chloroplast genes (rbcL, atpA, atpB, and rps4) for extant taxa, and combined parsimony analyses were conducted to infer evolutionary trends in the group. KEY RESULTS Dipteridaceae was found to be monophyletic and characterized by highly anastomosing minor veins forming a meshwork of areoles with free-included veinlets. Based on our analyses, we recognize six previously described genera (i.e., Goeppertella, Thaumatopteris, Clathropteris, Digitopteris, Dipteris, and Cheiropleuria) and one new genus (i.e., Sewardalea). Fossils currently described as Dictyophyllum, Kenderlykia, Hausmannia, and Protorhipis are ambiguously placed on the tree and are recognized as possibly unnatural morphogenera. CONCLUSIONS Overall, the evolutionary trend in Dipteridaceae has been toward increasing complexity in the venation pattern and laminal fusion. Only the Hausmannia-type frond with dichotomizing primary veins and relatively fused lamina persisted in the later part of the Mesozoic to the present. Within the crown group, we see evidence of re-radiation of frond forms in Dipteris and Cheiropleuria.
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monotypic colonies of clathropteris meniscioides Dipteridaceae from the early jurassic of central patagonia argentina implications for taxonomy and palaeoecology
Palaeontographica Abteilung B-palaophytologie, 2016Co-Authors: Thereis Y S Choo, Ignacio H Escapa, Benjamin BomfleurAbstract:A collection of over 130 specimens of the fossil dipterid fern Clathropteris meniscioides (Brongn. 1825) Brongn. 1828 from in-situ colonies in the Lower Jurassic of Chubut, Argentina, provides evid ...
Ignacio H Escapa - One of the best experts on this subject based on the ideXlab platform.
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assessing the evolutionary history of the fern family Dipteridaceae gleicheniales by incorporating both extant and extinct members in a combined phylogenetic study
American Journal of Botany, 2018Co-Authors: Thereis Y S Choo, Ignacio H EscapaAbstract:PREMISE OF THE STUDY Dipteridaceae is a lineage of ferns that has existed from the early Mesozoic and is known for its extensive fossil record. By integrating information from all described extant and extinct genera into a single phylogenetic study, this paper aims to examine the taxonomy of the group on a whole and explore character evolution within the lineage across time. METHODS A morphological matrix of 51 characters was developed for 72 species (43 extinct and 29 extant) based on published information. Morphological characters were combined with nucleotide sequences for four chloroplast genes (rbcL, atpA, atpB, and rps4) for extant taxa, and combined parsimony analyses were conducted to infer evolutionary trends in the group. KEY RESULTS Dipteridaceae was found to be monophyletic and characterized by highly anastomosing minor veins forming a meshwork of areoles with free-included veinlets. Based on our analyses, we recognize six previously described genera (i.e., Goeppertella, Thaumatopteris, Clathropteris, Digitopteris, Dipteris, and Cheiropleuria) and one new genus (i.e., Sewardalea). Fossils currently described as Dictyophyllum, Kenderlykia, Hausmannia, and Protorhipis are ambiguously placed on the tree and are recognized as possibly unnatural morphogenera. CONCLUSIONS Overall, the evolutionary trend in Dipteridaceae has been toward increasing complexity in the venation pattern and laminal fusion. Only the Hausmannia-type frond with dichotomizing primary veins and relatively fused lamina persisted in the later part of the Mesozoic to the present. Within the crown group, we see evidence of re-radiation of frond forms in Dipteris and Cheiropleuria.
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monotypic colonies of clathropteris meniscioides Dipteridaceae from the early jurassic of central patagonia argentina implications for taxonomy and palaeoecology
Palaeontographica Abteilung B-palaophytologie, 2016Co-Authors: Thereis Y S Choo, Ignacio H Escapa, Benjamin BomfleurAbstract:A collection of over 130 specimens of the fossil dipterid fern Clathropteris meniscioides (Brongn. 1825) Brongn. 1828 from in-situ colonies in the Lower Jurassic of Chubut, Argentina, provides evid ...
Zhuo Feng - One of the best experts on this subject based on the ideXlab platform.
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evidence for insect mediated skeletonization on an extant fern family from the upper triassic of china
Geology, 2014Co-Authors: Zhuo Feng, Yuxuan Chen, Tao Su, Jiyuan Yang, Jiahui DingAbstract:Leaf skeletonization represents a distinctive form of insect feeding behavior. It commonly occurs in angiosperm leaves after their initial appearance during the Early Cretaceous. This type of feeding behavior rarely has been documented in pre-Mesozoic fossils. We describe the earliest evidence of insect-skeletonized leaves of Dictyophyllum nathorstii Zeiller, affi li- ated with the extant fern family Dipteridaceae in the Late Triassic Yipinglang fl ora from southwestern China. The skeletonization generally is located adjacent to the pinna rachilla of the distal free portion of the leaf. In the skeletonized area, the interveinal tissue is com- pletely removed, exposing the pinna rachilla, pinnule midveins, and lateral veins. Most non- vascular tissue has been removed between the vascular bundles, the latter forming polygo- nal meshes of varying size. Our report of insect-mediated skeletonization of fern leaves from southwestern China fi lls a spatiotemporal gap in the published data on the paleogeographi- cal distribution and stratigraphic occurrence of plant-arthropod associations, and indicates an antagonistic relationship between a fern host and its insect herbivore.
Rafael Herbst - One of the best experts on this subject based on the ideXlab platform.
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propuesta de clasificacion de las Dipteridaceae
Publicación Electrónica de la Asociación Paleontológica Argentina, 2010Co-Authors: Rafael HerbstAbstract:A new classification is proposed for the Dipteridaceae: Dictyophyllum is retained as the oldest valid genus, while Thaumatopteris and Clathropteroides (a different spelling for Clathropteris , which is rejected) are used at subgeneric level. Camptopteris , Goeppertella , Hausmannia and the extant Dipteris are included in the Family, as shown in the key.
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upper triassic Dipteridaceae filicales from chile
Andean Geology, 2010Co-Authors: Rafael HerbstAbstract:Se describen cinco taxones de Dipteridacea procedentes de varios yacimientos del Triasico Superior de Chile, de los cuales dos son especies nuevas: Dictyophyllum (Dictyophylum) fuenzalidai sp. nov. y Goeppertella taverai sp. nov., las que integran la 'flora de Dicroidium', como en otras areas del Gondwana. Goeppertella, un genero esencialmente liasico, es reconocido por primera vez en Chile, pero en el Triasico. Dictyophyllum (D.) tenuifolium (Stipanicic y Menendez), citada erroneamente en este ultimo pais ya sea como D. carlsoni Nathorst o ?D. acutilobum Braun es frecuente en el Triasico, mientras que D. (Thaumatopteris) rothi Frenguelli es comun en el Lias de Argentina.
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Dipteridaceae filicales del triasico superior de chile
Revista Geologica De Chile, 2000Co-Authors: Rafael HerbstAbstract:espanolSe describen cinco taxones de Dipteridacea procedentes de varios yacimientos del Triasico Superior de Chile, de los cuales dos son especies nuevas: Dictyophyllum (Dictyophylum) fuenzalidai sp. nov. y Goeppertella taverai sp. nov., las que integran la 'flora de Dicroidium', como en otras areas del Gondwana. Goeppertella, un genero esencialmente liasico, es reconocido por primera vez en Chile, pero en el Triasico. Dictyophyllum (D.) tenuifolium (Stipanicic y Menendez), citada erroneamente en este ultimo pais ya sea como D. carlsoni Nathorst o ?D. acutilobum Braun es frecuente en el Triasico, mientras que D. (Thaumatopteris) rothi Frenguelli es comun en el Lias de Argentina. EnglishFive species of Dipteridaceae from different Upper Triassic localities of Chile are described, including two new ones: Dictyophyllum (Dictyophyllum) fuenzalidai and Goeppertella taverai. As elsewhere in Gondwana areas these ferns appear commonly with the 'Dicroidium flora'. Goeppertella, a typical Liassic genus is cited for the first time in Chile for the Triassic. Dictyophyllum (D.) tenuifolium (Stipanicic y Menendez), which was described in previous papers for this country as D. carlsoni Nathorst or ? D. acutilobum Braun, is very common in the Triassic, while D. (Thaumatopteris) rothi Frenguelli is frequent in the Lias of Argentina.
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Dipteridaceae filicales del triasico del arroyo llantenes provincia de mendoza y de paso flores provincia del neuquen argentina
Ameghiniana, 1993Co-Authors: Rafael HerbstAbstract:TRIASSIC Dipteridaceae (FILICALES) FROM ARROYO LLANTENES (MENDOZA PROVINCE) AND PASO FLORES (NEUQUEN PROVINCE), ARGENTINA. The Dipteridaceae ferns Dictyophyllum (Thaumatopteris) tenuiserratum (Menendez) nov. comb. et emend., and Dictyophyllum (Thaumatopteris) chihuiuensis (Menendez) nov. comb. from the late Middle Triassic of Arroyo Llantenes (Mendoza province) are redescribed. New material allows an enlargement of the diagnoses of these species originally based on very fragmentary specimens. A new species of Goeppertella, G. stipanicicii from the Upper Triassic of Paso Flores (Neuquen province) is also described.
Shenghui Deng - One of the best experts on this subject based on the ideXlab platform.
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plant fossils from the lower jurassic coal bearing formation of central inner mongolia of china and their implications for palaeoclimate
Palaeoworld, 2017Co-Authors: Shenghui Deng, Yi Zhao, Ping Shang, Ru Fan, Shuxin Dong, Lu LiuAbstract:Abstract The plant macrofossils from the Lower Jurassic coal-bearing Hongqi Formation in the Xilinhot Basin, central Inner Mongolia of North China, are systematically documented for the first time. The flora contains 40 species of 21 genera, belonging to horsetails, ferns, Cycadopsida, Ginkgopsida, conifers, and isolated seeds of unknown affinity. The Filicopsida, predominant in the flora, are characterized by high species diversity of form genus Cladophlebis (with 12 species), abundant Hausmannia ( Protorhipis ) of the Dipteridaceae, and existence of Coniopteris and Eboracia of the Dicksoniaceae. Among the gymnosperm group, the Ginkgopsida rank the second of the flora, with nine species representing Ginkgoites , Sphenobaiera of ginkgoales and Phoenicopsis , Czekanowskia of czekanowskiales. The Cycadopsida consist of six species, four of which belong to genera Anomozamites , Pterophyllum , Nilssoniopteris , and Ptilophyllum of bennettitales and the other two to Nilssonia and Ctenis of cycadaleans. Conifers, with a relatively smaller number of species, are characterized by long and broad leaves, including genera Podozamites , Elatocladus , and Pityophyllum . Based on the stratigraphical ranges of the known species, the existence of Coniopteris and Eboracia , and the abundance of Hausmannia and Cladophlebis , the age of the studied flora can be determined as late Early Jurassic and possibly the Toarcian. The existence of climate sensitive elements, particularly the thermophilous plants such as the dipteridaceous fern Hausmannia , bennettitales Ptilophyllum , further demonstrates that the climate of Xilinhot area during the late Early Jurassic was warm and humid, but could be hot and even arid as in the subtropic zone at short intervals. It was warmer than during both the early Early Jurassic and early Middle Jurassic, indicating a temperature rising event occurred in the late Early Jurassic. Palaeobotanical and sedimentary data also support the conclusion that a warming and somewhat arid climatic event occurred in the terrestrial area of North China. This climate change event was coincided possibly with the Toarcian Oceanic Anoxic Event (T-OAE), and could be the response of the terrestrial ecological system to the great and rapid change of palaeoenvironment in the marine ecosystem.