Where: Lang Son, Vietnam (21.8° N, 106.1° E: paleocoordinates 21.6° N, 105.0° E)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Na Duong Formation, Bartonian to Bartonian (41.3 - 33.9 Ma)
• Attributed to the middle–late Eocene age by Bohme et al. (2013), but Ducrocq et al. (2015) argue for an early late Eocene or middle late Eocene age. Garbin et al (2019) give an upper Bartonian - late Priabonian (34-39 Ma) age.
•
•Base of the lower lignite seam of the Na Duong Formation
• bed-level stratigraphic resolution
Environment/lithology: terrestrial; claystone and lignite
Size classes: macrofossils, mesofossils
Collected in 2012, 2013
Primary reference: S. Ducrocq, M. Benammi, O. Chavasseau, Y. Chaimanee, K. Suraprasit, P. Pha, V. Phuong, P. Phach, and J.-J. Jaeger. 2015. New anthracotheres (Cetartiodactyla, Mammalia) from the Paleogene of northeastern Vietnam: biochronological implications. Journal of Vertebrate Paleontology 35(3):e929139:1-11 [P. Mannion/P. Mannion]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 176502: authorized by Philip Mannion, entered by Philip Mannion on 15.02.2016
Creative Commons license: CC BY (attribution)
Taxonomic list
| Mammalia | |
Anthracokeryx naduongensis n. sp., Bothriogenys vietnamensis n. sp., Bothriogenys langsonensis n. sp.
Anthracokeryx naduongensis n. sp. Ducrocq et al. 2015 anthracothere ND-2012-02-15-1 - type; referred material: ND-2012-02-16-2, ND-2013-03-13-3 and ND-2013-03-15-1
Bothriogenys vietnamensis n. sp. Ducrocq et al. 2015 anthracothere ND-2012-Pha 1 - type; referred material: ND-2012-02-17-1, ND-2012-Pha 2, ND-2012-02-16-1, ND-2013-03-14-1, ND-2012-02-17-2, ND-2013-03-13-2 and ND 2013-03-14-3
Bothriogenys langsonensis n. sp. Ducrocq et al. 2015 anthracothere ND-2013-03-14-4 - type; referred material: ND-2013-03-13-6, ND- 2013-03-14-2, ND-2013-03-13-4 and ND-2012-02-18-1
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