''Olcostephanus'' is an extinct ammonoid cephalopod genus belonging to the family
Olcostephanidae
Olcostephanidae is an extinct ammonoid cephalopod family belonging to the superfamily Perisphinctoidea. These fast-moving nektonic carnivores lived from the Jurassic to the Cretaceous period.
Genera
*'' Bihenduloceras''
*'' Olcostephanus'' Neuma ...
. These fast-moving nektonic carnivores
[ lived during the ]Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...
, from the upper Valanginian
In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 139.8 ± 3.0 Ma and 132.9 ± 2.0 Ma (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretaceou ...
to the lower 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 132.9 ± 2 Ma and 129.4 ± 1.5 Ma (million years ago). The Hauterivian is preceded by the Va ...
age.[Sepkoski, Jac]
Sepkoski's Online Genus Database – Cephalopoda
/ref>[ Wright C. W. with J.H. Callomon and M.K. Howarth (1996), ''Mollusca 4 Revised, Cretaceous Ammonoidea'', vol. 4]
in ''Treatise on Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...
'', Part L (Roger L. Kaesler ''et al.'' eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, p.46.
Species[The Paleobiology Database]
/ref>
* ''Olcostephanus astierianus'' (d'Orbigny, 1840)
* ''Olcostephanus atherstoni'' Sharpe, 1856
* ''Olcostephanus bakeri'' Imlay, 1937
* ''Olcostephanus bosei'' Riedel, 1938
* ''Olcostephanus delicatecostatus'' Haas, 1960
* ''Olcostephanus detonii'' Rodighiero 1919
* ''Olcostephanus filifer'' Imlay, 1937
* ''Olcostephanus laticosta'' Gerth, 1925
* ''Olcostephanus paucicostatus'' Imlay, 1937
* ''Olcostephanus pecki'' Imlay, 1960
* ''Olcostephanus popenoei'' Imlay, 1960
* ''Olcostephanus prorsiradiatus'' Imlay, 1937
* ''Olcostephanus quadriradiatus'' Imlay, 1938
* ''Olcostephanus sanlazarensis'' Imlay, 1937
Distribution
Fossils of species within this genus have been found in the Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...
sediments of Antarctica, Argentina, Austria, Bulgaria, Chile, Colombia (Macanal Formation
The Macanal Formation or Macanal Shale ( es, (Formación) Lutitas de Macanal, Kilm, K1m) is a fossiliferous geological formation of the Altiplano Cundiboyacense and Tenza Valley in the Eastern Ranges of the Colombian Andes. The predominantly orga ...
, Eastern Ranges
The Eastern Ranges is an Australian rules football team in the NAB League, the Victorian statewide under-18s competition.
The club is a founding member of the competition (1992) and has produced several players for the Australian Football Leagu ...
),[Piraquive ''et al.'', 2011, p.204] Czech Republic, France, Hungary, Italy, Mexico, Morocco, Poland, Portugal, Romania, Slovakia, South Africa, Spain, Russia, United States, as well as in the Jurassic
The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...
of Argentina.[
]
References
Bibliography
*
Ammonitida genera
Perisphinctoidea
Cretaceous ammonites
Ammonites of Europe
Ammonites of Africa
Ammonites of North America
Ammonites of South America
Cretaceous Argentina
Jurassic Argentina
Fossils of Argentina
Cretaceous Chile
Fossils of Chile
Cretaceous Colombia
Fossils of Colombia
Paja Formation
Fossil taxa described in 1875
{{ammonitina-stub