Ginkgo leaf

[fgiarro]

Hi, I bought many years ago a Gingko leaf fossil, but unfortunately I lost the data regarding the name of the species and the location of discovery.

Leaf dimensions: 5.5 cm x 4.2 (wxh)-

Maybe someone can recognize the species a (and, possibly, site) from the picture I attach here?

 

Thanks in advance, Fabio

 

[hemipristis]

Could be Paleocene from North Dakota.  I’ve seen a number of examples from there. 

[Thomas.Dodson]

Doesn't look like typical Paleocene matrix from North Dakota.

[fgiarro]

I found an old label of the fossil that says it's from Montana (just that) and is labeled "Gingko biloba", with no age indication- I don't think it's actually that species (which is a living one and has larger leaves), but maybe someone knows of a Montana site where it' s possible that the fossil was found. Thanks in advance, Fabio

[piranha]

7 hours ago, fgiarro said:

I found an old label of the fossil that says it's from Montana (just that) and is labeled "Gingko biloba"

 

 

In North America it had been classified by Brown 1962 as Ginkgo adiantoides until Zhou et al. 2012 reclassified it as Ginkgo cranei.  However, Manchester 2014 has pointed out that Ginkgo wyomingensis  Manum 1966 has priority. Hopefully, an upcoming publication will address the oversight in synonymy (pers. comm. Manchester 2021).

 

 

text from Manchester 2014

 

 

Brown, R.W. 1962

Paleocene Flora of the Rocky Mountains and Great Plains.

United States Geological Survey Professional Paper, 375:1-119  PDF LINK

 

Manchester, S.R. 2014
Revisions to Roland Brown's North American Paleocene Flora.
Sborník Národního Muzea v Praze - Řada B, 70(3-4):153-210  PDF LINK

 

Manum, S.B. 1966

Ginkgo spitsbergensis n. sp. from the Paleocene of Spitsbergen and a Discussion of Certain Tertiary Species of Ginkgo from Europe and North America.

Norsk Polarinstitutt Årbok, 1965:49-58  PDF LINK

 

Zhou, Z., Quan, C., Liu, Y.S. 2012

Tertiary Ginkgo Ovulate Organs with Associated Leaves from North Dakota, USA, and their Evolutionary Significance.

International Journal of Plant Sciences, 173(1):67-80  PDF LINK

[fgiarro]

17 hours ago, piranha said:

 

 

In North America it had been classified by Brown 1962 as Ginkgo adiantoides until Zhou et al. 2012 reclassified it as Ginkgo cranei.  However, Manchester 2014 has pointed out that Ginkgo wyomingensis  Manum 1966 has priority. Hopefully, an upcoming publication will address the oversight in synonymy (pers. comm. Manchester 2021).

 

 

text from Manchester 2014

 

 

Brown, R.W. 1962

Paleocene Flora of the Rocky Mountains and Great Plains.

United States Geological Survey Professional Paper, 375:1-119  PDF LINK

 

Manchester, S.R. 2014
Revisions to Roland Brown's North American Paleocene Flora.
Sborník Národního Muzea v Praze - Řada B, 70(3-4):153-210  PDF LINK

 

Manum, S.B. 1966

Ginkgo spitsbergensis n. sp. from the Paleocene of Spitsbergen and a Discussion of Certain Tertiary Species of Ginkgo from Europe and North America.

Norsk Polarinstitutt Årbok, 1965:49-58  PDF LINK

 

Zhou, Z., Quan, C., Liu, Y.S. 2012

Tertiary Ginkgo Ovulate Organs with Associated Leaves from North Dakota, USA, and their Evolutionary Significance.

International Journal of Plant Sciences, 173(1):67-80  PDF LINK

Many thanks, very informative