Rhomboteuthis ''Rhomboteuthis'' is an extinct species of squid, with '' Rhomboteuthis lehmani'' currently being the only described member of the genus. ''Rhomboteuthis'' is known from during the Mid-Jurassic of Voulte-sur-Rhône, Ardèche, France France ...

lehmani'' is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

species of

squid A squid (: squid) is a mollusc with an elongated soft body, large eyes, eight cephalopod limb, arms, and two tentacles in the orders Myopsida, Oegopsida, and Bathyteuthida (though many other molluscs within the broader Neocoleoidea are also ...

, currently the only described member of its

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

. ''R. lehmani'' is known from the Lower Callovian (165–164 Ma) of Voulte-sur-Rhône,

Ardèche Ardèche (; , ; ) is a Departments of France, department in Auvergne-Rhône-Alpes, Southeastern France. It is named after the river Ardèche (river), Ardèche and had a population of 328,278 as of 2019.France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

Radiography Radiography is an imaging technology, imaging technique using X-rays, gamma rays, or similar ionizing radiation and non-ionizing radiation to view the internal form of an object. Applications of radiography include medical ("diagnostic" radiog ...

was used to locate the position of the

ink sac An ink sac is an anatomical feature that is found in many cephalopod mollusks used to produce the defensive cephalopod ink. With the exception of nocturnal and very deep water cephalopods, all Coleoidea (squid, octopus and cuttlefish) which dwell ...

and

gladius ''Gladius'' () is a Latin word properly referring to the type of sword that was used by Ancient Rome, ancient Roman foot soldiers starting from the 3rd century BC and until the 3rd century AD. Linguistically, within Latin, the word also came t ...

(pen) of the pictured specimen. Rhomboteuthis lehmani

References

* Fischer, J.-C. & B. Riou 1982. Les teuthoïdes (Cephalopoda, Dibranchiata) du Callovien inférieur de la Voulte-sur-Rhône (Ardèche, France). ''Annales de Paléontologie'' 68(4): 295–325. * Fischer, J.-C. 2003. Invertébrés remarquables du Callovien inférieur de la Voulte-sur-Rhône (Ardèche, France). ''Annales de Paléontologie'' 89: 223–252. Jurassic cephalopods Squid Fossils of France {{Squid-stub