In Depth
For lack of a better example, Vampyronassa resembles the extant genus Vampyroteuthis (better known as the vampire squid), save for a longer siphon for the expulsion of water to provide locomotion (also referred to as a hyponome), and a longer mantle (the round body that the arms attach to). Presumably Vampyronassa also had a similar lifestyle living in deep open water way it might have caught small marine organisms or more simply scavenge dead organic matter as it drifted by.
Further Reading
Vampyronassa rhodanica nov. gen. nov sp., vampyromorphe (Cephalopoda, Coleoidea) du Callovien inf�rieur de la Voulte-sur-Rh�ne (Ard�che, France).