{"id":"https://openalex.org/W1966267686","doi":"https://doi.org/10.1002/j.1537-2197.1989.tb15144.x","title":"STRUCTURALLY PRESERVED SPHENOPHYTES FROM THE TRIASSIC OF ANTARCTICA: VEGETATIVE REMAINS OF SPACIINODUM, GEN. NOV.","display_name":"STRUCTURALLY PRESERVED SPHENOPHYTES FROM THE TRIASSIC OF ANTARCTICA: VEGETATIVE REMAINS OF SPACIINODUM, GEN. NOV.","publication_year":1989,"publication_date":"1989-11-01","ids":{"openalex":"https://openalex.org/W1966267686","doi":"https://doi.org/10.1002/j.1537-2197.1989.tb15144.x","mag":"1966267686"},"language":"en","primary_location":{"id":"doi:10.1002/j.1537-2197.1989.tb15144.x","doi":"https://doi.org/10.1002/j.1537-2197.1989.tb15144.x","is_oa":false,"landing_page_url":"https://doi.org/10.1002/j.1537-2197.1989.tb15144.x","pdf_url":null,"source":{"id":"https://openalex.org/S205086949","display_name":"American Journal of Botany","issn_l":"0002-9122","issn":["0002-9122","1537-2197"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Botany","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5036972730","display_name":"Jeffrey M. Osborn","orcid":"https://orcid.org/0009-0006-0925-106X","observed_orcids":["https://orcid.org/0009-0006-0925-106X"]},"institutions":[{"id":"https://openalex.org/I52357470","display_name":"The Ohio State University","ror":"https://ror.org/00rs6vg23","country_code":"US","type":"education","lineage":["https://openalex.org/I52357470"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Jeffrey M. Osborn","raw_affiliation_strings":["Department of Botany and Byrd Polar Research Center The Ohio State University Columbus Ohio 43210"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Botany and Byrd Polar Research Center The Ohio State University Columbus Ohio 43210","institution_ids":["https://openalex.org/I52357470"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5111794742","display_name":"Thomas N. Taylor","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I52357470","display_name":"The Ohio State University","ror":"https://ror.org/00rs6vg23","country_code":"US","type":"education","lineage":["https://openalex.org/I52357470"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Thomas N. Taylor","raw_affiliation_strings":["Department of Botany and Byrd Polar Research Center The Ohio State University Columbus Ohio 43210"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Botany and Byrd Polar Research Center The Ohio State University Columbus Ohio 43210","institution_ids":["https://openalex.org/I52357470"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I52357470"],"apc_list":{"value":2660,"currency":"USD","value_usd":2660},"apc_paid":null,"fwci":1.1374,"has_fulltext":false,"cited_by_count":24,"citation_normalized_percentile":{"value":0.74732741,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":96},"biblio":{"volume":"76","issue":"11","first_page":"1594","last_page":"1594"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12359","display_name":"Fern and Epiphyte Biology","score":0.6567000150680542,"subfield":{"id":"https://openalex.org/subfields/1105","display_name":"Ecology, Evolution, Behavior and Systematics"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T12359","display_name":"Fern and Epiphyte Biology","score":0.6567000150680542,"subfield":{"id":"https://openalex.org/subfields/1105","display_name":"Ecology, Evolution, Behavior and Systematics"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10385","display_name":"Plant Diversity and Evolution","score":0.22789999842643738,"subfield":{"id":"https://openalex.org/subfields/1105","display_name":"Ecology, Evolution, Behavior and Systematics"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10109","display_name":"Paleontology and Stratigraphy of Fossils","score":0.053700000047683716,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/sphenophytes","display_name":"sphenophytes","score":0.902999997138977},{"id":"https://openalex.org/keywords/new-genus","display_name":"new genus","score":0.8960000276565552},{"id":"https://openalex.org/keywords/new-species","display_name":"new species","score":0.6499999761581421},{"id":"https://openalex.org/keywords/triassic","display_name":"Triassic","score":0.6299999952316284},{"id":"https://openalex.org/keywords/transantarctic-mountains","display_name":"Transantarctic Mountains","score":0.9660000205039978},{"id":"https://openalex.org/keywords/equisetum","display_name":"Equisetum","score":0.7590000033378601},{"id":"https://openalex.org/keywords/plant-anatomy","display_name":"plant anatomy","score":0.5740000009536743},{"id":"https://openalex.org/keywords/stomata","display_name":"stomata","score":0.746999979019165},{"id":"https://openalex.org/keywords/gondwana-flora","display_name":"Gondwana flora","score":0.7620000243186951}],"concepts":[{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.8580828905105591},{"id":"https://openalex.org/C137374422","wikidata":"https://www.wikidata.org/wiki/Q3238261","display_name":"Subgenus","level":3,"score":0.8278672695159912},{"id":"https://openalex.org/C2780432395","wikidata":"https://www.wikidata.org/wiki/Q21149008","display_name":"Reticulate","level":2,"score":0.7194159626960754},{"id":"https://openalex.org/C2781148125","wikidata":"https://www.wikidata.org/wiki/Q80583","display_name":"Gondwana","level":3,"score":0.7144439816474915},{"id":"https://openalex.org/C15228724","wikidata":"https://www.wikidata.org/wiki/Q192576","display_name":"Pith","level":2,"score":0.6891452670097351},{"id":"https://openalex.org/C187820883","wikidata":"https://www.wikidata.org/wiki/Q11827976","display_name":"Stele","level":2,"score":0.6688517332077026},{"id":"https://openalex.org/C178300618","wikidata":"https://www.wikidata.org/wiki/Q1898509","display_name":"Extant taxon","level":2,"score":0.5018103122711182},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.47940585017204285},{"id":"https://openalex.org/C49799701","wikidata":"https://www.wikidata.org/wiki/Q122811","display_name":"Xylem","level":2,"score":0.42633605003356934},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.3930603265762329},{"id":"https://openalex.org/C157369684","wikidata":"https://www.wikidata.org/wiki/Q34740","display_name":"Genus","level":2,"score":0.15587660670280457},{"id":"https://openalex.org/C78458016","wikidata":"https://www.wikidata.org/wiki/Q840400","display_name":"Evolutionary biology","level":1,"score":0.12531641125679016},{"id":"https://openalex.org/C109007969","wikidata":"https://www.wikidata.org/wiki/Q749565","display_name":"Structural basin","level":2,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1002/j.1537-2197.1989.tb15144.x","doi":"https://doi.org/10.1002/j.1537-2197.1989.tb15144.x","is_oa":false,"landing_page_url":"https://doi.org/10.1002/j.1537-2197.1989.tb15144.x","pdf_url":null,"source":{"id":"https://openalex.org/S205086949","display_name":"American Journal of Botany","issn_l":"0002-9122","issn":["0002-9122","1537-2197"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Botany","raw_type":"journal-article"},{"id":"doi:10.2307/2444397","doi":"https://doi.org/10.2307/2444397","is_oa":false,"landing_page_url":"https://doi.org/10.2307/2444397","pdf_url":null,"source":{"id":"https://openalex.org/S205086949","display_name":"American Journal of Botany","issn_l":"0002-9122","issn":["0002-9122","1537-2197"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-b","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"American Journal of Botany","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G4204080633","display_name":"Paleobotany in Antarctica:  Paleozoic and Mesozoic","funder_award_id":"8611884","funder_id":"https://openalex.org/F4320306076","funder_display_name":"National Science Foundation"}],"funders":[{"id":"https://openalex.org/F4320306076","display_name":"National Science Foundation","ror":"https://ror.org/021nxhr62"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":30,"referenced_works":["https://openalex.org/W69744790","https://openalex.org/W252025382","https://openalex.org/W644005719","https://openalex.org/W873726135","https://openalex.org/W1485152933","https://openalex.org/W1546499246","https://openalex.org/W1551238635","https://openalex.org/W1601269890","https://openalex.org/W1965245064","https://openalex.org/W1965740910","https://openalex.org/W1969063205","https://openalex.org/W1982009605","https://openalex.org/W1993306502","https://openalex.org/W2001009547","https://openalex.org/W2005085436","https://openalex.org/W2030201116","https://openalex.org/W2031532836","https://openalex.org/W2049506152","https://openalex.org/W2051118527","https://openalex.org/W2058325333","https://openalex.org/W2062711071","https://openalex.org/W2146729856","https://openalex.org/W2317442611","https://openalex.org/W2322447051","https://openalex.org/W2606239034","https://openalex.org/W2793493822","https://openalex.org/W2947088498","https://openalex.org/W4295795786","https://openalex.org/W4387727082","https://openalex.org/W6997136760"],"related_works":["https://openalex.org/W2124752624","https://openalex.org/W1994362154","https://openalex.org/W2080680191","https://openalex.org/W1966300310","https://openalex.org/W1971813268","https://openalex.org/W2103423439","https://openalex.org/W1993306502","https://openalex.org/W2146517309","https://openalex.org/W2089320096","https://openalex.org/W2046839571"],"abstract_inverted_index":{"Sphenophyte":[0],"remains":[1],"of":[2,16,67,99],"Early-Middle":[3],"Triassic":[4],"age":[5],"are":[6,38,51,57],"described":[7],"from":[8,42,102],"silicified":[9],"peat":[10],"collected":[11],"in":[12,45,82],"the":[13,83],"Transantarctic":[14],"Mountains":[15],"Antarctica.":[17],"The":[18,62,106],"new":[19],"sphenophyte,":[20],"Spaciinodum":[21],"collinsonii":[22],"sp.":[23],"nov.,":[24],"is":[25,80,87,95,109],"represented":[26],"by":[27,53,89],"ribbed,":[28],"jointed":[29],"stems":[30],"with":[31,111,123,134],"characteristic":[32],"pith":[33],"and":[34,50,86,97,116],"carinal":[35],"canals.":[36],"Stems":[37],"relatively":[39],"small,":[40],"ranging":[41,101],"1.8\u20133.0":[43],"mm":[44],"diameter,":[46],"lack":[47],"secondary":[48],"tissues,":[49],"characterized":[52],"vallecular":[54],"canals":[55],"that":[56],"restricted":[58],"to":[59,104],"nodal":[60,84],"regions.":[61],"internodal":[63],"vascular":[64,78],"system":[65],"consists":[66],"12\u201318":[68],"collateral":[69],"bundles":[70],"which":[71],"alternate":[72],"between":[73],"successive":[74],"internodes.":[75],"A":[76],"complete":[77],"ring":[79],"present":[81],"region":[85],"surrounded":[88],"a":[90],"continuous":[91],"double":[92],"endodermis.":[93],"Xylem":[94],"endarch":[96],"composed":[98],"elements":[100],"annular":[103],"reticulate.":[105],"Antarctic":[107],"sphenophyte":[108],"compared":[110],"other":[112],"Gondwana":[113],"fossil":[114],"articulates":[115],"extant":[117],"Equisetum.":[118],"Superficial":[119],"stomata":[120],"suggest":[121],"affinities":[122],"modern":[124],"Equisetum":[125],"subgenus":[126],"Equisetum;":[127],"however,":[128],"some":[129],"anatomical":[130],"differences":[131],"preclude":[132],"assignment":[133],"living":[135],"species.":[136]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":2},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":2},{"year":2012,"cited_by_count":2}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2016-06-24T00:00:00"}
