Mixosiphonata is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

nautiloids Nautiloids are a group of marine cephalopods (Mollusca) which originated in the Late Cambrian and are represented today by the living ''Nautilus'' and ''Allonautilus''. Fossil nautiloids are diverse and speciose, with over 2,500 recorded species. ...

that lived from the

Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...

to the

Early Cretaceous The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pro ...

. It currently includes the genera '' Boggyoceras'', ''

Zhuravlevia ''Zhuravlevia'' is a genus of extinct shelled cephalopod that lived in the north west part of the Caucasus region of the middle east during the late Aptian stage of the early Cretaceous. This creature is believed to be an Orthocerid nautiloid, w ...

'', and possibly ''

Ctenobactrites ''Ctenobactrites'' is an extinct genus of cephalopods that lived from the Carboniferous to the Permian. It contains seven valid species which have been found in Europe, Asia, and North America. It was originally assigned to the order Bactritida ...

''. They were the latest surviving

orthoconic An orthocone is an unusually long straight shell of a nautiloid cephalopod.; During the 18th and 19th centuries, all shells of this type were named ''Orthoceras'', creating a wastebasket taxon, but it is now known that many groups of nautiloids d ...

nautiloids, which had otherwise gone extinct in the

Late Triassic The Late Triassic is the third and final epoch (geology), epoch of the Triassic geologic time scale, Period in the geologic time scale, spanning the time between annum, Ma and Ma (million years ago). It is preceded by the Middle Triassic Epoch ...

References

Prehistoric cephalopod orders Nautiloids {{Nautiloidea-stub