Hang Mon 1
Basic information
Sample name: Hang Mon 1
Reference: J. Prieto, P.-O. Antoine, J. van der Made, G. Métais, L. T. Phuc, Q. T. Quan, S. Schneider, D. N. Tran, D. Vasilyan, L. T. Viet, and M. Böhme. 2018. Biochronological and palaeobiogeographical significance of the earliest Miocene mammal fauna from Northern Vietnam. Palaeobiodiversity and Palaeoenvironments 98:287-313 [ER 4077]
Geography
Country: Vietnam
State: Son La
Coordinate: 20° 56' 9" N, 104° 22' 13" E
Coordinate basis: stated in text
Formation: Hang Mon
Time interval: Early Miocene
Zone: MN2
Geography comments: "Sediments of the uppermost Hang Mon formation are exposed in an abandoned coal mine near Hang Mon village"
"The mammal biochronology is in line with palynology, suggesting a minimum age of 21.12 Ma (Böhme et al. 2011). In conclusion, mammalian biochronology and palynostratigraphy indicate an age of approximately 23 to 21 Ma for the composite fauna from Hang Mon, corresponding to the early Aquitanian (earliest Miocene)" (this is almost precisely MN2)
"The mammal biochronology is in line with palynology, suggesting a minimum age of 21.12 Ma (Böhme et al. 2011). In conclusion, mammalian biochronology and palynostratigraphy indicate an age of approximately 23 to 21 Ma for the composite fauna from Hang Mon, corresponding to the early Aquitanian (earliest Miocene)" (this is almost precisely MN2)
Environment
Lithology: more than one
Habitat comments: "from a 10-m-thick, partially salmon-coloured clay layer" according to Ginsburg et al. (1992) that was not relocated by the current authors in 2011
"The historical rhinocerotid find (Bao et al. 1978; Dzanh and Van Hai 1995), as well as the Carnivora indet. discussed below, most probably was derived from the coaly part of the section... In contrast, the purported lophiomerycid molar reported by Böhme et al. (2011) was embedded in the sandy part of the outcrop... In conclusion, the fauna from Hang Mon 1 has to be interpreted as a composite fauna coming from at least three different sedimentary layers"
"The historical rhinocerotid find (Bao et al. 1978; Dzanh and Van Hai 1995), as well as the Carnivora indet. discussed below, most probably was derived from the coaly part of the section... In contrast, the purported lophiomerycid molar reported by Böhme et al. (2011) was embedded in the sandy part of the outcrop... In conclusion, the fauna from Hang Mon 1 has to be interpreted as a composite fauna coming from at least three different sedimentary layers"
Methods
Life forms: carnivores,rodents,ungulates
Sampling methods: screenwash,surface
Sample size: 15 specimens
Years: 2011
Museum: MNHN, GMV
Sampling comments: this locality was first reported by Bao et al. (1978) and was repeatedly studied over the intervening years
new material described in this paper was collected in 2011
most collections were based on "surface sampling", but Covert et al. (2001) reported material yielded by screen washing
new material described in this paper was collected in 2011
most collections were based on "surface sampling", but Covert et al. (2001) reported material yielded by screen washing
Metadata
Sample number: 4502
Contributor: John Alroy
Enterer: John Alroy
Modifier no: John Alroy
Created: 2024-11-19 12:02:16
Modified: 2024-11-19 12:13:28
Abundance distribution
9 species
6 singletons
total count 15
geometric series index: 45.0
Fisher's α: 9.500
geometric series k: 0.8178
Hurlbert's PIE: 0.8143
Shannon's H: 1.9867
Good's u: 0.6182
Each square represents a species. Square sizes are proportional to counts.
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Register
| †Pleuroceros blanfordi | 2 | |
| Protaceratherium sp. | 2 | |
| Dorcatherium sp. | 1 | |
| Dorcabune sp. | 1 | |
| †Hyotherium cf. youngi | 5 | |
| †Amphicyon cf. giganteus | 1 | |
| Carnivora indet. | 1 | |
| "small, primitive" and as yet unstudied | ||
| Rodentia indet. | 1 | |
| "Hystricidae" of Ginsburg et al. 1992 | ||
| Mammalia indet. | 1 | |
| "Tapirus sp." of Covert et al. 2001 | ||