M-15, near Antanandava: Ladinian - Carnian, Madagascar

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Rhynchosauria indet. (Osborn 1903)
Traversodontidae
Dadadon isaloi Flynn et al. 2000
Chiniquodontidae
Chiniquodon kalanoro n. sp. Kammerer et al. 2010
1 specimen
UA 10607, a partial mandible
see common names

Geography
Country:Madagascar State/province:Toliara
Coordinates: 22.2° South, 45.0° East (view map)
Paleocoordinates:43.9° South, 30.6° East
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period: Triassic Epoch: Middle Triassic - Late Triassic
Stage: Ladinian - Carnian 10 m.y. bin: Triassic 2 - Triassic 3
Key time interval: Ladinian - Carnian
Age range of interval: 242 - 227 m.y. ago
Stratigraphy
Geological group:Isalo Formation:Isalo II Member:Lower
Stratigraphic resolution:group of beds
Stratigraphy comments: Unit is known as either the Makay Formation or "Isalo II"; basal part of unit. This formation is of uncertain age and is generally considered Ladinian or Carnian; Langer et al. (2000) support a Carnian age based upon palynology and their interpretation of the phylogenetic position of the rhynchosaur material; by contrast, Kammerer et al. (2010) consider a Ladinian age more likely
Lithology and environment
Primary lithology:red claystone
Secondary lithology: sandstone
Includes fossils?Y
Lithology description: "Specimens occur in a sequence of variegated, bioturbated red and green clays and siltstones, and gray cross-bedded fine- to coarse-grained sandstones. UA 10607 was found in the red clay deposits"
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Temporal resolution:snapshot
Collection methods and comments
Collection methods:mechanical,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: UA: Universit d’Antananarivo, Antananarivo, Madagascaro
Metadata
Database number:100373
Authorizer:R. Butler Enterer:R. Butler
Modifier:M. Carrano Research group:vertebrate
Created:2010-12-08 20:35:46 Last modified:2018-06-27 14:51:26
Access level:the public Released:2010-12-08 20:35:46
Creative Commons license:CC BY
Reference information

Primary reference:

34461. C. F. Kammerer, J. J. Flynn, L. Ranivoharimanana and A. R. Wyss. 2010. The first record of a probainognathian (Cynodontia: Chiniquodontidae) from the Triassic of Madagascar. Journal of Vertebrate Paleontology 30(6):1889-1894 [R. Butler/R. Butler]