{{Short description|Extinct genus of flowering plants}} {{Automatic taxobox |image =Credneria triacuminata.jpg |image_caption = ''Credneria triacuminata'' leaf |fossil_range = {{fossil range|Cretaceous}} |taxon = Credneria |authority = Zenker }}
'''''Credneria''''' is an extinct genus in the family or Platanaceae<ref>{{cite journal| author=Thomas Denk| author2=Maria V. Tekleva| name-list-style=amp|year=2006|title=Comparative pollen morphology and ultrastructure of Platanus: Implications for phylogeny and evaluation of the fossil record|journal=Grana|volume=45| issue=3|pages=195–221|doi=10.1080/00173130600873901|doi-access=free| bibcode=2006Grana..45..195D}}</ref><ref>{{cite journal|title=The early fossil history of Salicaceae: a brief review| author=Collinson, Margaret E| journal=Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences| volume=98| pages=155–167| year=1992|doi=10.1017/S0269727000007521}}</ref><ref>{{cite journal |last1=Wang |first1=H. |last2=Dilcher |first2=D. |year=2018 |title=Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA. |journal=Palaeontologia Electronica |volume=21 |issue=3 |doi=10.26879/841|doi-access=free }}</ref> of broad-leaf trees similar to extinct ''Platanus'' species that appeared during the Cretaceous. The genus was first described by Zenker (1833) and has formerly been placed in the family Salicaceae<ref name=gbif>{{Cite web | url=https://www.gbif.org/species/8184418 | title=Credneria Zenker, 1833}}</ref> rather than Platanaceae on occasion. ''Credneria'' leaves are preserved in sandstone and less often in siltstone. The leaves are typically obovate with a pinnate-actinodromous venation and distinct suprabasal veins.<ref>{{cite journal|author= Georg F. Tschana|author2= Thomas Denka|author3= Maria von Balthazara|title=Credneria and Platanus (Platanaceae) from the Late Cretaceous (Santonian) of Quedlinburg, Germany|journal= Review of Palaeobotany and Palynology|volume= 152|issue= 3–4|pages= 211–236|year=2008|doi=10.1016/j.revpalbo.2008.05.004|bibcode= 2008RPaPa.152..211T}}</ref>
==Species== Known species are:<ref>{{cite journal |last1=Halamski |first1=A. |year=2013 |title=Latest Cretaceous leaf floras from southern Poland and western Ukraine |journal=Acta Palaeontologica Polonica |volume=58 |issue=2 |pages=407–443 |url=https://www.app.pan.pl/archive/published/app58/app20110024.pdf}}</ref><ref name=gbif/><ref>{{cite book|url=http://rzbl04.biblio.etc.tu-bs.de:8080/docportal/servlets/MCRFileNodeServlet/DocPortal_derivate_00037944/SK-5-9.pdf|author=P. B. Richter|title=Über die Kreidepflanzen der Umgebung Quedlinburgs.|year=1905|access-date=2017-04-24|archive-url=https://web.archive.org/web/20170425023944/http://rzbl04.biblio.etc.tu-bs.de:8080/docportal/servlets/MCRFileNodeServlet/DocPortal_derivate_00037944/SK-5-9.pdf|archive-date=2017-04-25|url-status=dead}}</ref><ref>{{cite journal|author=Knobloch E.|year=1997|title="Credneria" bohemica Velenovský – eine altertümliche Platane|journal=Palaeontographica B|volume=1242|pages=127–148}}</ref> {{div col}} * *''Credneria biloba'' *''Credneria bohemica'' *''Credneria comparabilis'' <ref>{{Cite web | url=https://www.gbif.org/species/8912373 | title=Credneria comparabilis Hollick}}</ref> *''Credneria cuneifolia'' *''Credneria daturaefolia'' (Ward) <ref>{{Cite web | url=https://www.gbif.org/species/9183213 | title=Credneria daturaefolia Ward}}</ref> *''Credneria denticulata'' <ref>{{Cite web | url=https://www.gbif.org/species/4924339 | title=Credneria denticulata}}</ref> *?''Credneria grewiopsoides'' <ref>{{Cite web | url=https://www.gbif.org/species/8800809 | title=Credneria grewiopsoides Hollick}}</ref> *''Credneria integerrima'' *?''Credneria longifolia'' *''Credneria pachyphylla'' *''Credneria parva'' *''Credneria prophylloides'' (Knowlton) *''Credneria pulchra'' *?''Credneria spatiosa'' *''Credneria subserrata'' (Hampe) *''Credneria subtriloba'' *''Credneria sudanense'' *''Credneria triacuminata'' (Hampe) {{div col end}}
The species ''Crednetia basinervosa'' (Hollick),<ref>{{Cite web | url=https://www.gbif.org/species/9103550 | title=Credneria basinervosa Hollick}}</ref> ''C. elegans'' (Hollick),<ref>{{Cite web | url=https://www.gbif.org/species/9004063 | title=Credneria elegans Hollick}}</ref> ''C. inordinata'' (Hollick), ''C. intermedia'' (Hollick), ''C. mixta''(Hollick), and ''C. truncatodenticulata'' (Bell) have all been identified as junior synonyms of the platanaceous species ''Pseudoprotophyllum boreale''.<ref name="Golovneva2009">{{cite journal |last1=Golovneva |first1=L. B. |year=2009 |title=The morphology, taxonomy, and occurrence of the genus ''Pseudoprotophyllum'' Hollick (Platanaceae) in Late Cretaceous floras of Northern Asia. |journal=Paleontological Journal |volume=43 |issue=10 |pages=1230–1244|doi=10.1134/S0031030109100050 |bibcode=2009PalJ...43.1230G }}</ref> The species ''Credneria grewiopsoides'' (Hollick), ''C. longifolia'' (Hollick) and ''C. spatiosa'' (Hollick) from the Cenomanian Melozi and Kaltag formations along the Yukon River in Alaska are also possibly representatives of ''Pseudoprotophyllum boreale'', but the known fossil material for the species was considered too incomplete to make a determination.<ref name="Golovneva2009"/> ==References== {{Reflist}}
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Category:Cretaceous plants Category:Platanaceae Category:Salicaceae Category:Fossil record of plants Category:Prehistoric angiosperm genera