Jovellaniidae was established as a family within the

Oncocerida The Oncocerida comprise a diverse group of generally small nautiloid cephalopods known from the Middle Ordovician to the Mississippian (early Carboniferous; one possible member is known from the Early Permian), in which the connecting rings are t ...

to include genera characterized by longiconic orthocones and cyrtocones with a subtriangular to depressed cross-section in which the ventral (siphuncular) side is typically angular or more acutely rounded than the dorsal (antisiphuncular) side, and in which the siphuncle is generally large, ventral, and with lamellar actinosiphonate deposits (Flower 1950, Sweet 1964) Jovelaniids have a range that extends from the Middle Silurian to the Upper Ordovician and are known from North America Europe. (Sweet 1964) They are thought to be derived from the

Valcouroceratidae The Valcouroceratidae is a family within the Oncocerida, nautiloid cephalopods from the middle and upper Ordovician, established by Rousseau Flower in 1945. Diagnosis Valcouroceratids are characterized by exogastric cyrtocones and brevicones tha ...

. Jovellaniidae was given its name by Foord in 1888; its type is the genus '' Jovellania''

References

* Flower,R.H. 1950; Flower & Kummel; A Classification of the Nautiloidea;Journal of Paleontology, Vol 24, no 5, pp604–610, Sept 1950 * Sweet, W.C. 1964; Nautiloidea-Oncocerida, Treatise on Invertebrate Paleontology, Part K Nautiloidea, Geological Society of America and University of Kansas Press. Teichert and Moore (eds) Prehistoric nautiloid families Wenlock first appearances Late Devonian animals Late Devonian extinctions Oncocerida {{devonian-animal-stub