Nautiloids are a group of marine cephalopods (Mollusca) which originated in the Late Cambrian and are represented today by the living Nautilus and Allonautilus...

coleoids (i.e., octopuses, squid and cuttlefish) than they are to shelled nautiloids (such as the living Nautilus). The earliest ammonoids appeared during...

is the long, cone-shaped shell belonging to several species of ancient nautiloid cephalopod—the prehistoric ancestors of today's marine cephalopod mollusks...

Orthoceras is a genus of extinct nautiloid cephalopod restricted to Middle Ordovician-aged marine limestones of the Baltic States and Sweden. This genus...

became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses:...

chambers enclosed between two adjacent septa in the phragmocone of a nautiloid or ammonoid cephalopod molluscus. These can be seen in cross-sections...

With only a handful of species surviving today, the Nautiloids flourished during the early Paleozoic era, from the Late Cambrian, where they constituted...

be the upper surface. All cephalopods with external shells except the nautiloids became extinct by the end of the Cretaceous period 65 million years ago...

Ward, P.D. & W.B. Saunders 1997. Allonautilus: a new genus of living nautiloid cephalopod and its bearing on phylogeny of the Nautilida. Journal of Paleontology...

Spiriferida, etc.) recover and become very common again, but trilobites and nautiloids decline. Glaciation in East Gondwana continues from Late Devonian. Tuhua...

Multiceratoidea is a major subclass or superorder of Paleozoic nautiloid cephalopods. Members of this group can be characterized by nautilosiphonate connecting...

Coleoidea, diverged from the nautiloids long ago and the nautilus has remained relatively unchanged since. Nautiloids were much more extensive and varied...

scientific papers previously treated Cameroceras as the absolute largest nautiloid-grade cephalopod, with a shell length reaching 5.7 metres (19 ft) or even...

Science. Retrieved June 9, 2021. John, James St (2007-07-31). Fossil nautiloid shell with original iridescent nacre in fossiliferous asphaltic limestone...

trilobites and the nautiloid cephalopod including the orthocerid order of extinct Silurian-Devonian orthoceratoid cephalopods. Nautiloid cephalopods are...

Endocerida is an extinct nautiloid order, a group of cephalopods from the Lower Paleozoic with cone-like deposits in their siphuncle. Endocerida was a...

S2CID 33880578. Kauffman, E (2004). "Mosasaur Predation on Upper Cretaceous Nautiloids and Ammonites from the United States Pacific Coast" (PDF). PALAIOS. 19...

descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed little from their nautiloid counterparts. These ammonoids...

nodules to defend against predators such as primitive eurypterids and nautiloids while other trilobites such as Aeglina prisca evolved to become swimming...

geodized pentamerid brachiopods from strata in Indiana Sphooceras was a Nautiloid cephalopod found in Silurian strata of the Czech Republic Jamoytius was...

This list of nautiloids is a comprehensive listing of all genera that have ever been included in the subclass Nautiloidea, excluding purely vernacular...

may have taught their offspring how to hunt, as supported by a fossil nautiloid Argonautilus catarinae with bite marks from two conspecific mosasaurs...

also numerous, including the genera Murchisonia, Euomphalus, Naticopsis. Nautiloid cephalopods are represented by tightly coiled nautilids, with straight-shelled...

Cambrian times, finally became extinct before the end of the Permian. Nautiloids, a subclass of cephalopods, surprisingly survived this occurrence. There...

The cephalopods have a long geological history, with the first nautiloids found in late Cambrian strata, and purported stem-group representatives present...

groups still prevalent today evolved or diversified, such as primitive nautiloids, vertebrates (then only jawless fish) and corals. This process is known...

Species Location Material Notes Images Deltoidonautilus D. vredenburgin A Nautiloid Caestocorbula C. gujaratensis A Clam. Bicorbula B. kutchensis A Clam....

along the ventral edge of the shell. In some fossil straight shelled nautiloids, cylindrical calcareous growths ("siphuncular deposits") around the siphuncle...

as a way to live in calcium-poor fresh water. First toothed fish and nautiloids. First of many modern groups, including tetrapods. Jaekelopterus, giant...

within the cephalopod subclass Ammonoidea originating from bactritoid nautiloids, that lived in what would become Africa, Asia, Australia, Europe, and...