''Pseudothurmannia'' is a genus of extinct cephalopods belonging to the subclass
Ammonoidea
Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttle ...
and included in the family
Crioceratitidae
Crioceratitidae is an extinct cephalopod family belonging to the subclass Ammonoidea and included in the order Ammonitida.
Genera
* ''Acantholytoceras'' Spath, 1932
* ''Balearites
''Balearites'' is an extinct ancyloceratin genus included in ...
of the
ammonitid superfamily Ancylocerataceae. These fast-moving nektonic carnivores
[ lived 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 ...
period, from 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 to Barremian
The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 129.4 ± 1.5 Ma (million years ago) and 121.4 ± 1.0 Ma). It is a subdivision of the Early Cretaceous Epoch (or Lower Cretaceous Series). It is preceded ...
age.[Sepkoski, Jac]
Sepkoski's Online Genus Database – Cephalopoda
/ref>
Species
[Klein, J. ''et al.'', 2007. FOSSILIUM CATALOGUS I:ANIMALIA Pars 144, Lower Cretaceous Ammonites III Bochianitoidea, Protancyloceratoidea, Ancyloceratoidea, Ptychoceratoidea.]
* ''Pseudothurmannia angulicostata'' d'Orbigny, 1863
* ''Pseudothurmannia belimelensis'' Dimtrova, 1967
* ?''Pseudothurmannia biassalensis'' Dimtrova, 1967
* ''Pseudothurmannia catulloi'' Parona, 1898
* ?''Pseudothurmannia crimensis'' Wiedmann, 1962
* ''Pseudothurmannia grandis'' Busnardo, 1970
* ''Pseudothurmannia isocostata'' Kakabadze, 1981
* ''Pseudothurmannia karakaschi'' Manolov, 1962
* ''Pseudothurmannia lurensis'' Busnardo, 1970
* ''Pseudothurmannia macilenta'' d'Orbigny, 1841
* ''Pseudothurmannia mortilleti'' Pictet and de Loriol, 1858
* ''Pseudothurmannia ohmi'' Winkler, 1868
* ''Pseudothurmannia picteti'' Sarkar, 1955
* ''Pseudothurmannia provencalis'' Wiedmann, 1962
* ''Pseudothurmannia pseudomalbosi'' Sarasin and Schandelmayer, 1901
* ''Pseudothurmannia renevieri'' Sarasin and Schöndelmayer, 1901
* ''Pseudothurmannia rugosa'' Busnardo, 2003
* ''Pseudothurmannia sarasini'' Sarkar, 1955
Description
Shell of ''Pseudothurmannia'' species can reach a diameter of about . They show flat or slightly convex sides, a surface with dense ribs and a subquadrate whorl section.
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 ...
rocks of Antarctica, Bulgaria, Czechoslovakia, France, Hungary, Italy, Japan, Morocco, Spain, Russia and United States.[
]
References
External links
* Hoedemaeker, Philip. J.
SEXUAL DIMORPHISM IN THE GENUS PSEUDOTHURMANNIA
Ammonitida genera
Crioceratitidae
Cretaceous ammonites
Ammonites of Europe
{{Ammonitida-stub