Credneria

Credneria (Zenker 1833) is an extinct genus in the family Salicaceae[1] or Platanaceae[2][3] of broad-leaf trees similar to extinct Platanus species that appeared during the Cretaceous. Its foliage is preserved in sandstone and less often in siltstone. The leaves are typically obovate with a pinnate-actinodromous venation and distinct suprabasal veins.[4]

Fossil Credneria triacuminata leaf in the Botanischer Garten Dresden

Credneria
Temporal range: Cretaceous
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Salicaceae
Genus: †Credneria
Zenker

Species

Known species are:[5][1][6][7]

  • Crednetia triacuminata (Hampe),[8] the first broad-leafed tree known
  • Crednetia basinervosa (Hollick) [9]
  • Crednetia cuneifolia
  • Crednetia bohemica
  • Crednetia subserrata (Hampe)
  • Crednetia denticulata [10]
  • Crednetia subtriloba
  • Crednetia integerrima
  • Crednetia biloba
  • Crednetia comparabilis [11]
  • Crednetia daturaefolia (Ward) [12]
  • Crednetia elegans [13]
  • Crednetia grewiopsoides [14]
  • Crednetia inordinata
  • Crednetia intermedia
  • Crednetia longifolia
  • Crednetia mixta
  • Crednetia pachyphylla
  • Crednetia parva
  • Crednetia prophylloides (Knowlton)
  • Crednetia pulchra
  • Crednetia spatiosa
  • Crednetia sudanense

References
  1. "Credneria Zenker, 1833".
  2. Thomas Denk & Maria V. Tekleva (2006). "Comparative pollen morphology and ultrastructure of Platanus: Implications for phylogeny and evaluation of the fossil record". Grana. 45:3 (3): 195–221. doi:10.1080/00173130600873901.
  3. 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.
  4. 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.
  5. Halamski, A.T. (2013). "Latest Cretaceous leaf floras from southern Poland and western Ukraine" (PDF). Acta Palaeontologica Polonica. 58 (2): 407–443.
  6. P. B. Richter (1905). Über die Kreidepflanzen der Umgebung Quedlinburgs (PDF).
  7. Knobloch E. (1997). ""Credneria" bohemica Velenovský – eine altertümliche Platane". Palaeontographica B. 1242: 127–148.
  8. "A fossil leaf of Credneria triacuminata. Large leaves are indicative of humid tropical climates. This specimen is approximately 17cms [sic] wide, it was found in Heidelberg, Germany and dates back to the Late Cretaceous". PortForLio.
  9. "Credneria basinervosa Hollick".
  10. "Credneria denticulata".
  11. "Credneria comparabilis Hollick".
  12. "Credneria daturaefolia Ward".
  13. "Credneria elegans Hollick".
  14. "Credneria grewiopsoides Hollick".
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