Na Duong Mine layer 80 : Bartonian - Priabonian, Vietnam

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Crocodylia indet. (Owen 1842)
at least three types reported present from 50 specimens
    = Orientalosuchus naduongensis n. gen., n. sp. Massonne et al. 2019
Massonne et al. 2019
GPIT/RE/09761 - holotype
Maomingosuchus acutirostris n. sp. Massonne et al. 2021
Massonne et al. 2021
GPIT-PV-31657 - holotype
Reptilia - Testudines
Geoemydidae indet. Theobald 1868
    = Banhxeochelys trani n. gen., n. sp. Garbin et al. 2019
Garbin et al. 2019
GPIT/RE/09760 (holotype), a nearly complete shell; more than 100 individuals
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
more than 100 specimens of turtles
Striatochelys baba n. gen., n. sp. Massonne et al. 2023
Massonne et al. 2023 12 specimens
GPIT-PV-112860, carapace, xiphiplastron, thoracic vertebrae (GPIT-PV-112860-1) and partial plastron (entoplastron, GPIT-PV-112860-2; hyoplastron right, GPIT-PV-112860-3; hyoplastron left, GPIT-PV- 112860-4; hypoplastron right, GPIT-PV-112860-5) and further postcranial material (cervical vertebra, GPIT-PV- 112860-6; left pectoral girdle, GPIT-PV-112860-7; left humerus, GPIT-PV-112860-8; right radius, GPIT-PV- 112860-9; right ulna, GPIT-PV-112860-10; phalanx, GPIT-PV-112860-11).
Mammalia - Anthracotheriidae
Bakalovia orientalis n. sp. Böhme et al. 2013
Mammalia - Perissodactyla - Rhinocerotidae
Epiaceratherium naduongense n. sp. Böhme et al. 2013
Actinopteri - Amiiformes - Amiidae
Amiinae indet. Bonaparte 1837
Actinopteri - Cypriniformes - Cyprinidae
Barbinae indet.
"Barbinae gen. indet. sp. 1"
see common names

Geography
Country:Vietnam State/province:Lang Son County:Loc Binh
Coordinates: 21.7° North, 107.0° East (view map)
Paleocoordinates:21.7° North, 105.9° East
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period: Paleogene Epoch: Eocene
Stage: Bartonian - Priabonian 10 m.y. bin: Cenozoic 3
Key time interval: Bartonian - Priabonian
Age range of interval: 41.2 - 33.9 m.y. ago
Stratigraphy
Formation:Na Duong
Stratigraphic resolution:bed
Stratigraphy comments: 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
Lithology and environment
Primary lithology: lignite
Includes fossils?Y
Lithology description: The lignite can be characterized as subbituminous coal to coaly shale (Wysocka 2009). The coaly shales of the main coal seam (layer 80 in Fig. 2) are laminated and particularly enriched in iron sulfide, mainly pyrite.
Environment:lacustrine - large
Geology comments: In the lower part, the seam occasionally contains coalified tree trunks (Fig. 3C). Characterized as acidic lake.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:salvage,selective quarrying,sieve,field collection
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:169420
Authorizer:P. Holroyd, P. Mannion, E. Vlachos Enterer:P. Holroyd, P. Mannion, E. Vlachos
Modifier:P. Mannion Research group:freshwater,vertebrate
Created:2015-05-25 16:29:38 Last modified:2022-05-20 04:26:33
Access level:the public Released:2015-05-25 16:29:38
Creative Commons license:CC BY
Reference information

Primary reference:
55373. M. Böhme, M. Aiglstorfer, P.-O. Antoine, E. Appel, P. Havlik, G. Métais, Laq The Phuc, S. Schneider, F. Setzer, R. Tappert, Dang Ngoc Tran and D. J. Uhl Prieto. 2013. Na Duong (northern Vietnam) – an exceptional window into Eocene ecosystems from Southeast Asia. Zitteliana A 53:120-167 [P. Holroyd/P. Holroyd/M. Carrano]

Secondary references:

67969 R. C. Garbin, M. Böhme, and W. G. Joyce. 2019. A new testudinoid turtle from the middle to late Eocene of Vietnam. PeerJ 7:e6280:1-39 [E. Vlachos/E. Vlachos/P. Mannion]
81724 T. Massonne, F. J. Augustin, A. T. Matzke, E. Weber, and M. Böhme. 2021. A new species of Maomingosuchus from the Eocene of the Na Duong Basin (northern Vietnam) sheds new light on the phylogenetic relationship of tomistomine crocodylians and their dispersal from Europe to Asia. Journal of Systematic Palaeontology 19(22):1551-1585 [P. Mannion/P. Mannion/P. Mannion]
85551 T. Massonne, F. J. Augustin, A. T. Matzke and M. Boehme. 2023. A new cryptodire from the Eocene of the Na Duong Basin (northern Vietnam) sheds new light on Pan-Trionychidae from Southeast Asia. Journal of Systematic Palaeontology 21(2217505):1-25 [E. Vlachos/E. Vlachos/E. Vlachos]
70973 T. Massonne, D. Vasilyan, M. Rabi and M. Böhme. 2019. A new alligatoroid from the Eocene of Vietnam highlights an extinct Asian clade independent from extant Alligator sinensis. PeerJ 7:e7562:1-60 [P. Mannion/P. Mannion]