nautiloid


Also found in: Dictionary, Encyclopedia, Wikipedia.
Related to nautiloid: Nautiloidea

nautiloid

any mollusc of the subclass Nautiloidea, a group of cephalopods related to the fossil ammonites, which produce a large spiral chambered shell, in the last chamber of which the animal lives.
Mentioned in ?
References in periodicals archive ?
Knowing that the chambered shells represent cephalopods also helps us to interpret the ancient environments inhabited by nautiloids.
Twenty-five million years ago, nautiloids occurred in seas around the world, but now they are restricted to a region from the Philippines south through Indonesia to Australia and eastward to the Fiji Islands.
Breed, "The Discovery of Orthocone Nautiloids in the Redwall Limestone, Marble Canyon, Arizona," in C.
Stephenson (1941) described only one nautiloid species from the Navarro Group.
Reconstructing the life history of modern and fossil nautiloids based on the nitrogen isotopic composition of shell organic matter and amino acids.
All of the hundreds of species of nautiloids, except four species of Nautilus, disappeared as living things ages before man came into existence upon the earth" (193).
Among the fossils are a variety of creatures from sponges, worms and nautiloids to solitary hydroids, also known as the flowers of the sea.
Fossils of nautiloids (an ancestor of the giant squid) dug up during the building of the new centre are set into the floor of the building; a reconstructed Stone Age roundhouse sits on the site of a crannog (a prehistoric dwelling built on an artificial island in a lake); and the reserve's spectacular new glass-sided bird observatory sits above lime kilns that provided many of the bricks that built Belfast.
Common fossils of the "Kimmeridge" at the Langenberg are bivalves, gastropods, brachiopods and ichnofossils; in higher parts of the section, even nautiloids occur.
Dick's Ganymedian slime-mold Lord Running Clam; Octavia Butler's gigantic tentacled Oankali slugs; Hal Clement's Mesklinite centipedes; the ichthyoids, arachnoids, nautiloids, and echinoderms of Star Maker; the sublime jellyfish of The Abyss.