''Megacrioceratinae'' is an extinct
ammonoid
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 cuttlefish) ...
cephalopod subfamily. It has been described as family Megacrioceratidae in 2006, but later changed into subfamily under its current name.
[Vermeulen J. & Meister C. 2014. Nouvelles espèces du genre Garroniceras Vermeulen et al., 2012 (Ammonitida, Hamulinoidea, Hamulinidae, Megacrioceratinae). Riviera Scientifique 98: 73-90.] Ammonites belonging to this subfamily lived from ''Plesiospitidiscus ligatus'' zone of
Upper Hauterivian until ''Avramidiscus kiliani'' zone of
Lower 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 b ...
.
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Genera
[Vermeulen (J.), Lazarin (P.), Lépinay (P.), Leroy (L.), Mascarelli (E.), Meister (C.) & Menkveld-Gfeller (U.), 2012 - Ammonites (Ancyloceratina, Turrilitina) nouvelles ou peu connues de l'Hauterivien supérieur. Annales du Museum d'Histoire Naturelle de Nice, t. 27, p. 271-318]
* '' Garroniceras''
* '' Megacrioceras''
* ''Bastelia
''Bastelia'' is genus of ammonite from the Upper Hauterivian, during ''Balearites mortilleti'' zone and possibly also ''Pseudothurmannia angulicostata'' zone. Its fossils have been found in Switzerland (''B. schloegli'') and France
...
''
* '' Liautaudia''
References
Early Cretaceous ammonites
Hauterivian life
Barremian life
Ancyloceratoidea
{{Ammonitida-stub