Diademoceras is a genus of nautiloid cephalopods from the middle Devonian of North America, named by Rousseau Flower in 1945. The genus is a tainoceratacean included in the nautilid family Rutoceratidae.
The shell of Diademoceras is gyroconic, of no more than two whorls, coiled such that whorls do not touch. Whorls are broad, section depressed, sides converge ventrally meeting at a well developed keel. Ornamentation consists of a series of spines on either side as well as transverse striae which form a well developed hyponomic sinus (for the funnel) on the venter. Sutures are straight across the venter, but form a broad shallow lobe on the dorsum. The siphuncle is close to the venter, composed of straight and empty segments, i.e. orthochoanitic.
diademoceras, genus, nautiloid, cephalopods, from, middle, devonian, north, america, named, rousseau, flower, 1945, genus, tainoceratacean, included, nautilid, family, rutoceratidae, temporal, range, middle, devonian, scientific, classification, domain, eukary. Diademoceras is a genus of nautiloid cephalopods from the middle Devonian of North America named by Rousseau Flower in 1945 The genus is a tainoceratacean included in the nautilid family Rutoceratidae DiademocerasTemporal range Middle Devonian Scientific classification Domain Eukaryota Kingdom Animalia Phylum Mollusca Class Cephalopoda Subclass Nautiloidea Order Nautilida Family Rutoceratidae Genus DiademocerasFlower 1945 The shell of Diademoceras is gyroconic of no more than two whorls coiled such that whorls do not touch Whorls are broad section depressed sides converge ventrally meeting at a well developed keel Ornamentation consists of a series of spines on either side as well as transverse striae which form a well developed hyponomic sinus for the funnel on the venter Sutures are straight across the venter but form a broad shallow lobe on the dorsum The siphuncle is close to the venter composed of straight and empty segments i e orthochoanitic References editBernhard Kummel 1964 Nautiloidea Nautilida Treatise on Invertebrate Paleontology Geological Society of America and University of Kansas Press nbsp This prehistoric nautiloid related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Diademoceras amp oldid 1165995442, wikipedia, wiki, book, books, library,
