Credneria is an extinct genus in the family or Platanaceae[1][2][3] 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[4] 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.[5]
The species Crednetia basinervosa (Hollick),[13]C. elegans (Hollick),[14]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.[15] The species Credneria grewiopsoides (Hollick), C. longifolia (Hollick) and C. spatiosa (Hollick) from the CenomanianMelozi 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 to incomplete to make a determination.[15]
^Collinson, Margaret E (1992). "The early fossil history of Salicaceae: a brief review". Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences. 98: 155–167. doi:10.1017/S0269727000007521.
^Georg F. Tschana; Thomas Denka; Maria von Balthazara (2008). "Credneria and Platanus (Platanaceae) from the Late Cretaceous (Santonian) of Quedlinburg, Germany". Review of Palaeobotany and Palynology. 152 (3–4): 211–236. doi:10.1016/j.revpalbo.2008.05.004.
^ abGolovneva, L. B. (2009). "The morphology, taxonomy, and occurrence of the genus Pseudoprotophyllum Hollick (Platanaceae) in Late Cretaceous floras of Northern Asia". Paleontological Journal. 43 (10): 1230–1244.
