''Spitidiscus'' is a genus of
ammonite
Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family N ...
s placed in the family
Holcodiscidae
Holcodiscidae is an ammonite family placed in the superfamily Desmoceratoidea. [Hauterivian
The Hauterivian is, in the geologic timescale, an age in the Early Cretaceous Epoch or a stage in the Lower Cretaceous Series. It spans the time between 132.6 ± 2 Ma and 125.77 (million years ago). The Hauterivian is preceded by the Valangi ...]
of England.
Biostratigraphic significance
The first appearance of the species ''
Spitidiscus hugii'' or ''
Spitidiscus vandeckii'' are proposed to be the marker for the beginning of the
Barremian
The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 125.77 Ma (million years ago) and 121.4 ± 1.0 Ma (Historically, this stage was placed at 129.4 million to approximately 125 million years ago) It is a ...
.
Distribution
''Spitidiscus'' has been found in:
[
* Agrio Formation, Argentina
* ]Magdalena Valley
The Magdalena River (, ; less commonly ) is the main river of Colombia, flowing northward about through the western half of the country. It takes its name from the biblical figure Mary Magdalene. It is navigable through much of its lower reaches, ...
, Simití and Cáqueza
Cáqueza () is a municipality and town of Colombia in the department of Cundinamarca. The town, located on the Altiplano Cundiboyacense, is from the capital Bogotá. The municipality borders Fosca in the south, Ubaque in the north, Une and Chi ...
, Colombia
* Kaliste Formation, Czech Republic
* France
* Gagra, Georgia, Caucasus
* Maiolica Formation, Italy
* Subbetics, Spain
* Foggy Creek, Oregon
* Bulgaria
* Portugal
* Russia
* Morocco
* Mexico
References
Bibliography
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Desmoceratoidea
Ammonitida genera
Index fossils
Cretaceous ammonites
Barremian life
Hauterivian life
Ammonites of Europe
Fossils of the Czech Republic
Cretaceous France
Fossils of France
Fossils of Georgia (country)
Cretaceous Italy
Fossils of Italy
Cretaceous Spain
Fossils of Spain
Ammonites of North America
Paleontology in Oregon
Fossils of the United States
Ammonites of South America
Cretaceous Argentina
Fossils of Argentina
Cretaceous Colombia
Fossils of Colombia
Fossil taxa described in 1910
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