Armissam quarry, near Narbonne: Late/Upper Oligocene - Early/Lower Miocene, France
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Anthracotheriidae
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Anthracotherium hippoideum
Rutimeyer 1856
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recombined as Paenanthracotherium hippoideum | ||||||||||
Mammalia
- Rodentia
- Pseudosciuridae
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Pseudosciurus suevicum
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Reptilia
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Lazarussuchus inexpectatus n. gen., n. sp.
Hecht 1992
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1 specimen | |||||||||
Re 437 (holotype skeleton with skull) | ||||||||||
see common names |
Geography
Country: | France | State/province: | Aude |
Coordinates: | 43.2° North, 3.1° East (view map) | ||
Paleocoordinates: | 43.1° North, 1.1° East | ||
Basis of coordinate: | based on nearby landmark |
Time
Key time interval: | Late/Upper Oligocene - Early/Lower Miocene |
Age range of interval: | 27.82000 - 15.98000 m.y. ago |
Stratigraphy
Stratigraphy comments: The age of the deposit has been variously assigned to the lower Miocene (Aquitanian) by de Lapparent (1906, 1938) and Lavocat (1955) and by Schmidt-Kittler (1971) to the later Oligocene (Stampian). The deposit described by Noulet (1877) and Viguier (1888) was an old quarry and was well known and collected assiduously towards the end of the last century (de Saporta 1865 ; de Lapparent 1906, p. 1590 ; Lavocat 1955). Early authors (such as Noulet 1877) noted the remains of abundant plant fragments, molluscs, birds, mammals, reptiles and fishes. It is interesting to note that both words, mammals and reptiles, are recorded in the plural state although only one reptile is known from the deposit. Many aquatic angiosperms were noted by de Saporta (1866). Two mammals have been recorded from the deposit: Anthracotherium hippoideum (Noulet Urn) and Pseudosciurus suevicum. (Lavocat 1955 ; Schmidt-Kittler 1971). No other mention has been made of the Anthracotherium. Lavocat (1955) following de Lapparent states that the Pseudosciurus indicated a lower Miocene age (Aquitanian). Schmidt-Kittler (1971) in his review of the genus implies that the Armissan specimen is identical with specimens from Germany and states that the latest date for this form is middle Stampian. Noulet (1877) and Viguier (1888) record that all the vertebrate fossils are from one layer. The matrix of the block, in which the specimen was included, had imprints of plant leaves, ostracods and fish teeth. Apparently the original quarries have been filled and lost. |
Lithology and environment
Primary lithology: | "limestone" |
Includes fossils? | Y |
Environment: | terrestrial indet. |
Geology comments: The specimen is from a freshwater (probably marshy) limestone deposit |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils,microfossils |
Collection methods and comments
Collection excludes: | some macrofossils,some microfossils |
Collection methods: | selective quarrying,survey of museum collection |
Reason for describing collection: | taxonomic analysis |
Collection method comments: Claude Bernard University collection | |
Taxonomic list comments:Early authors (such as Noulet 1877) noted the remains of abundant plant fragments, molluscs, birds, mammals, reptiles and fishes. It is interesting to note that both words, mammals and reptiles, are recorded in the plural state although only one reptile is known from the deposit. Many aquatic angiosperms were noted by de Saporta (1866). Two mammals have been recorded from the deposit: Anthracotherium hippoideum (Noulet Urn) and Pseudosciurus suevicum. (Lavocat 1955 ; Schmidt-Kittler 1971). |
Metadata
Database number: | 117925 | ||
Authorizer: | R. Benson | Enterer: | R. Benson |
Modifier: | R. Benson | Research group: | vertebrate |
Created: | 2011-09-28 21:47:17 | Last modified: | 2011-09-28 07:49:51 |
Access level: | the public | Released: | 2011-09-28 21:47:17 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
37897. | M. K. Hecht. 1992. A new choristodere (Reptilia, Diapsida) from the Oligocene of France: an example of the Lazarus effect. Geobios 25(1):115-131 [R. Benson/R. Benson] |