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English: Fossil - Avimaia Schweitzerae - Histology - Medullary Bone[1][2][3]

https://www.nature.com/articles/s41467-019-09259-x

Histology reveals the presence of small amounts of medullary bone (MB) in the femur of Avimaia. Natural light (a, c, d—left image) and polarized light microscopy (b, d—right image) show slow growing, parallel-fibered and almost avascular cortical bone (CB), and small, endosteal trabeculae of lamellar MB (which are much darker than the CB and the endosteal bone, EB) extending into the medullary cavity. Other abbreviations: IPS intact periosteal surface, LAG line of arrested growth, LB lamellar bone, LMI layer of microbial invasion, LVC longitudinal vascular canal, PFB parallel-fibered bone, RL resorption line. Scale bar is 500 μm in a, 200 μm in b, 100 μm in c, and 50 μm in d

References

  1. ↑ Bailleul, Alida M. (20 March 2019). "An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone". Nature Communications 10. DOI:10.1038/s41467-019-09259-x. Retrieved on 22 March 2019.
  2. ↑ Pickrell, John (20 March 2019). "Unlaid egg discovered in ancient bird fossil". Science. DOI:10.1126/science.aax3954. Retrieved on 22 March 2019.
  3. ↑ Greshko, Michael (20 March 2019). "In a first, fossil bird found with unlaid egg - “I couldn’t even sleep at night,” the lead paleontologist says of her reaction to the discovery.". National Geographic Society. Retrieved on 22 March 2019.
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Source https://media.springernature.com/lw900/springer-static/image/art%3A10.1038%2Fs41467-019-09259-x/MediaObjects/41467_2019_9259_Fig4_HTML.png
Author Alida M. Bailleul[1]

References

  1. ↑ Bailleul, Alida M. (20 March 2019). "An Early Cretaceous enantiornithine (Aves) preserving an unlaid egg and probable medullary bone". Nature Communications 10. DOI:10.1038/s41467-019-09259-x. Retrieved on 22 March 2019.
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Fossil - Avimaia Schweitzerae - Histology - Medullary Bone

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current21:53, 29 July 2021Thumbnail for version as of 21:53, 29 July 20211,350 × 1,039 (1.88 MB)RemitamineHigher resolution version
16:13, 22 March 2019Thumbnail for version as of 16:13, 22 March 2019900 × 692 (940 KB)DrbogdanUser created page with UploadWizard

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