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

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). Archived from the original (PDF) on 2017-04-25. Retrieved 2017-04-24.
  7. Knobloch E. (1997). ""Credneria" bohemica Velenovský – eine altertümliche Platane". Palaeontographica B. 1242: 127–148.
  8. "Credneria basinervosa Hollick".
  9. "Credneria comparabilis Hollick".
  10. "Credneria daturaefolia Ward".
  11. "Credneria denticulata".
  12. "Credneria elegans Hollick".
  13. "Credneria grewiopsoides Hollick".
  14. "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.
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