Ankirihitra, unit 2b: Middle Callovian, Madagascar

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Perisphinctidae
Obtusicostites sp.
Kinkeliniceras kinkelini (Dacque 1910)
Choffatia aff. cobra
Grossouvria evexa
synonym of Choffatia
Grossouvria rjasanensis
synonym of Choffatia
Cephalopoda - Ammonitida - Oppeliidae
Kheraites giraudi
Campylites secula Spath 1928
var. malakialinensis
Sindeites madagascariensis
Bivalvia - Ostreida - Palaeolophidae
Alectryonia gregarea (Sowerby 1816)
recombined as Actinostreon gregareum
see common names

Coordinates: 16.8° South, 46.5° East (view map)
Paleocoordinates:24.4° South, 24.2° East
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Period:Jurassic Epoch:Middle Jurassic
Stage:Callovian 10 m.y. bin:Jurassic 5
Key time interval:Middle Callovian
Age range of interval:164.70000 - 161.20000 m.y. ago
Local section:Ankirihitra Local bed:2b
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Oecoptychius refractus and Phlycticeras franconicum zone
Lithology and environment
Primary lithology: lithified marl
Secondary lithology: lithified "limestone"
Environment:marine indet.
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Database number:98133
Authorizer:W. Kiessling Enterer:U. Merkel
Research group:marine invertebrate
Created:2010-09-21 06:29:36 Last modified:2010-09-21 09:29:36
Access level:the public Released:2010-09-21 06:29:36
Creative Commons license:CC BY
Reference information

Primary reference:

8015.PGAP 1022H. Besairie and M. Collignon. 1972. Geologie de Madagascar I. Les Terrains Sedimentaires. Annales Geologiques de Madagascar 35:1-463 [A. Rees/A. Rees]