Tanaing Amber Mine, Hukawng Valley: Early Cenomanian, Myanmar

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Angiospermae - Rosales - Rhamnaceae
Eophylica priscastellata n. gen., n. sp. flower, seed/fruit Shi et al. 2022
Shi et al. 2022 16 specimens
QUST-AM32413 (holotype), also QUST-AM20501–QUST-AM20510, QUST-AM20512, QUST-AM32415–QUST-AM32417, QUST-AM33310
Phylica piloburmensis n. sp. flower, seed/fruit Shi et al. 2022
Shi et al. 2022 4 specimens
QUST-AM32127 (holotype), also QUST-AM33311, QUST-AM20513, QUST-AM20514
Polypodiopsida - Cyatheales - Thyrsopteridaceae
Thyrsopteris cyathindusia n. sp.
Zhang et al. 2022
QUST-AM10321 (holotype)
see common names

Geography
Country:Myanmar State/province:Kachin County:Myitkyina
Coordinates: 26.3° North, 96.6° East (view map)
Paleocoordinates:12.3° North, 93.9° East
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Cenomanian 10 m.y. bin: Cretaceous 5
Key time interval: Early Cenomanian
Age range of interval: 100.5 - 93.9 m.y. ago
Age estimate: 98.79 ± 0.62 Ma (U/Pb)
Stratigraphy
Stratigraphic resolution:member
Stratigraphy comments: "A mid-Cretaceous age has been assigned to both the amber and surrounding rock. There are thousands of arthropods in the amber considered to be from the Turonian– Cenomanian, as well as a specimen of the ammonite Mortoniceras (Middle-Upper Albian) and distinctive palynomorphs (Upper Albian to Lower Cenomanian) from the amber-bearing horizon, among many other biological inclusions. A recent study using U-Pb dating of zircons in amber-bearing rock refined the date to 98.79 Ma ± 0.62 Ma. This date was further verified by a newly-discovered Late Albian–Early Cenomanian ammonite, Puzosia (Bhimaites), found among the amber inclusions. A 98.79 ± 0.62 Ma (earliest Cenomanian) origin is now the most widely accepted age for the Hukawng Valley amber mine" (Shi et al. 2022)
Lithology and environment
Primary lithology: amber
Lithology description: "The ambers containing the fossils reported here were collected from a small pit mine and a larger strip mine exposing amber-associated facies about 1 m (75–125 cm) thick. The ambers are typically reddish brown in colour, with various shades of yellow, orange, and red. These colours range from pale to dark, and can vary from perfectly transparent to opaque. Organic matter particles is common in the amber." (Shi et al. 2022)
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body,amber
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collection method comments: Repository: Qingdao University of Science and Technology, Shandong, China
Metadata
Database number:227277
Authorizer:B. Allen, M. Uhen Enterer:B. Allen, M. Ellingsworth
Modifier:B. Allen
Created:2022-09-29 05:42:35 Last modified:2022-09-29 06:07:07
Access level:the public Released:2022-09-29 05:42:35
Creative Commons license:CC BY
Reference information

Primary reference:
82742. C. Shi, S. Wang, H.-H. Cai, H.-R. Zhang, X.-X. Long, E. Tihelka, W.-C. Song, Q. Feng, R.-X. Jiang, C.-Y. Cai, N. Lombard, X. Li, J. Yuan, J.-P. Zhu, H.-Y. Yang, X.-F. Liu, Q.-P. Xiang, Z.-T. Zhao, C.-L. Long, H. Schneider, X.-C. Zhang, H. Peng, D.-Z. Li and Y. Fan. 2022. Fire-prone Rhamnaceae with South African affinities in Cretaceous Myanmar amber. Nature Plants 8:125-135 [B. Allen/B. Allen/B. Allen]

Secondary references:

82743 C. Shi, S. Wang, and M. S. Engel. 2022. Systematic palaeontology, in Fire-prone Rhamnaceae with South African affinities in Cretaceous Myanmar amber. Nature Plants 8:125-135 [B. Allen/B. Allen]
86615 H. Zhang, C. Shi, X. Long, Q. Feng, and H. Cai, Y., and S. Wang. 2022. A new fossil record of Thyrsopteridaceae (Cyatheales) from the mid-Cretaceous amber of Myanmar. Paleoworld 31(3):478-484 [M. Uhen/M. Ellingsworth]