Naduo Formation
Geologic formation in Guangxi, China
From Wikipedia, the free encyclopedia
The Naduo Formation or Nadu Formation is a geologic formation in Guangxi, southern China. The Naduo Formation preserves fossils dating back to the Middle or Late Eocene epoch of the Paleogene period, including a relatively diverse fauna of mammals.[1]
| Naduo Formation | |
|---|---|
| Stratigraphic range: Middle or Late Eocene | |
| Type | Formation |
| Underlies | Gongkang Formation[1] |
| Overlies | Bose Basin[1] |
| Location | |
| Region | Guangxi |
| Country | China |
Paleoenvironment
In 1999, Gengwu Liu and Rongyu Yang published a study of fossil pollen collected in the Naduo Formation, identifying a diverse flora of 160 species, in 121 genera and 62 families.[2] Based on the pollen, they could determine that the paleoenvironment of the Naduo Formation was likely a lowland basin, covered by a mixed evergreen and deciduous broad-leaved forest, probably similar to the environments that still dominate southern China today.[2]
Mammal fossils
Aegialodontia
| Genus/family | Species | Notes/affinities | Images |
|---|---|---|---|
| Eodesmatodon[1] | E. spanios |
Artiodactyla
| Genus/family | Species | Notes/affinities | Images |
|---|---|---|---|
| Anthracothema[1] | A. rubricae | An anthracothere. | |
| Anthracokeryx[1] | A. birmanicus | An anthracothere. The fossil record of Anthracokeryx in the Naduo Formation is very poor, and species assignments are questionable.[3] A. moriturus may also be a synonym of Anthracotherium crassum.[4] The recognition of Microbunodon in the Naduo Formation in 2010 casts doubt on identification of Anthracokeryx, since the two genera are difficult to tell apart dentally.[3] | |
| A. moriturus | |||
| A. sp. | |||
| Bothriodon?[1] | B. chyelingensis | An anthracothere. |  |
| Choeropotamidae or Helohyidae gen. nov.[1] | A new (undescribed) genus and species of cheropotamid or helohyid. | ||
| Entelodontidae[1] | Entelodontidae indet. | An indeterminate entelodont. | |
| Gobiomeryx[1] | G. sp. | A ruminant. | |
| Heothema[1] | H. bellia | An anthracothere. | |
| H. media | |||
| Huananothema[1] | H. imparilica | An anthracothere. | |
| Indomeryx[1] | I. cotteri | A ruminant. | |
| Microbunodon[3] | M. sp. | An anthracothere. |  |
| Notomeryx[1] | N. besensis | A ruminant. | |
| N. major | |||
| Suidae gen. nov. A[1] | sp. nov. | A new (undescribed) genus and species of suid. | |
| Suidae gen. nov. B[1] | sp. nov. | A new (undescribed) genus and species of suid. | |
| Tayassuidae gen. nov.[1] | sp. nov. | A new (undescribed) genus and species of peccary. | |
| Tragulidae[1] | Tragulidae indet. | A ruminant. |
Carnivora
| Genus/family | Species | Notes/affinities | Images |
|---|---|---|---|
| Cephalogale[1] | C. sp. nov. | A hemicyonine ("dog bear"). |  |
| cf. Cephalogale[1] | cf. C. sp. | A hemicyonine ("dog bear"). | |
| Guangxicyon[5] | G. sinoamericanus | An amphicyonid ("bear-dog").[1] Previously treated under the nomen nudum "Guangxicynodon sinocaliforniae".[5] |  |
| Pachycynodon? | P.? sp. | An amphicynodontid. |
Hyaenodontia
| Genus/family | Species | Notes/affinities | Images |
|---|---|---|---|
| Propterodon?[1] | P.? sp. | A hyaenodontid. |
Mesonychia
| Genus/family | Species | Notes/affinities | Images |
|---|---|---|---|
| Guilestes[1] | G. acares | A mesonychid. | |
| G. cf. acares | |||
| cf. Harpagolestes[1] | cf. H. sp. | A mesonychid. |  |
Perissodactyla
| Genus/family | Species | Notes/affinities | Images |
|---|---|---|---|
| Caenolophus[1] | C. sp. | An amynodont. | |
| Deperetella[1] | D. sp. | A deperetellid. | |
| Eomoropus[1] | E. cf. quadridentatus | An eomoropid. | |
| Guixia[1] | G. simplex | A rhinoceros. | |
| Huananodon[1] | H. hui | An amynodont. | |
| "Metatelmatherium"[1] | "M". cf. browni | A brontothere.[1] "Metatelmatherium" browni does not belong to the genus Metatelmatherium, and the poor fossil material makes it difficult to identify.[6] It may be a synonym of the dubious brontothere Sivatitanops birmanicum.[6] | |
| Paramynodon[1] | P. sp. | An amynodont. |