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Topic: Rayonnoceras

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	InfoHub - Rayonnoceras - A Nautiloid of Long Ago (Site not responding. Last check: 2007-10-19)
		Rayonnoceras was a genus of cephalopod mollusks that lived during the Carboniferous period (359-318.1 million years ago).
		Rayonnoceras differed from other Actinoceatids in that it had siphuncle segments that were smaller and globular.
		Rayonnoceras had a siphuncle which was complex and in a central position.
	www.infohub.com /forums/printthread.php?t=8003 (379 words)

	Palaeos Metazoa: Mollusca: Cyrtosoma: Cephalopoda: Actinocerida
		According to a poorly documented old report, the Carboniferous Rayonnoceras may have had shells as long as 6 meters, rivaling even the biggest endocerids in size, and making it one of the biggest animals of its time.
		The Actinocerid siphuncle (left, from Teichert, 1988) is very distinctive, large and heavy, and frequently the only part of the shell preserved.
		Sactoceras, Ormoceras, Deiroceras, Troedssonoceras, Treptoceras, Paractinoceras, Rayonnoceras, Leurorthoceras.
	www.palaeos.com /Invertebrates/Molluscs/Cyrtosoma/Cephalopoda/Actinocerida.html (738 words)

	Nautiloid - Biocrawler (Site not responding. Last check: 2007-10-19)
		The shells of fossil nautiloids may be either straight (as in Orthoceras and Rayonnoceras), curved (as in Cyroceras) or coiled (as in Cenoceras), or a hellical coil (as in Lorieroceras).
		The rocks of the Ordovician period in the Baltic coast and parts of the United States contain a variety of nautiloid fossils, and specimens such as Discitoceras and Rayonnoceras may be found in the limestones of the Carboniferous period in the Republic of Ireland.
		The marine rocks of the Jurassic period in the United Kingdom often yield specimens of Cenoceras, and nautiloids such as Eutrephoceras are also found in the Pierre Shale formation of the Cretaceous period in the midwestern part of the United States.
	www.biocrawler.com /encyclopedia/Nautiloid (1529 words)

	Nautiloid - Wikipedia, the free encyclopedia
		The shells of fossil nautiloids may be either straight (i.e., orthoconic as in Orthoceras and Rayonnoceras), curved (as in Cyrtoceras) coiled (as in Cenoceras), or a hellical coil (as in Lorieroceras).
		The rocks of the Ordovician period in the Baltic coast and parts of the United States contain a variety of nautiloid fossils, and specimens such as Discitoceras and Rayonnoceras may be found in the limestones of the Carboniferous period in Ireland.
		The marine rocks of the Jurassic period in Britain often yield specimens of Cenoceras, and nautiloids such as Eutrephoceras are also found in the Pierre Shale formation of the Cretaceous period in the midwestern part of the United States.
	en.wikipedia.org /wiki/Nautiloid (1797 words)

	Arkansas Mississippian Nautiloid
		Description: This large nautiloid is a Rayonnoceras from the Mississippian of Arkansas which is free of matrix.
		The straight shells show them to be distantly related to another group of Orthocones, the Endoceratids, some of which grew to 6 meters in length.
		Rayonnoceras have been found in Arkansas at lengths up to 2.5 meters.
	www.fossilmall.com /EDCOPE_Enterprises/ammonites/Ammo41/Ammonite-41.htm (252 words)

	AMMONOID ASSEMBLAGES ASSOCIATED WITH RAYONNOCERAS SOLIDIFORME CRONEIS, LOWER FAYETTEVILLE SHALE ...
		Occasionally, concretionary "halos" surrounding living chambers of the nautiloid Rayonnoceras solidiforme Croneis contain the ammonoids Emstites, Tumulities, Cluthoceras, Fayettevillea, and Paracravenoceras, in general descending order of abundance.
		Those ammonoids were compared with an assemblage collected at the same horizon a few yards away, an assemblage from another locality within the type area, and an assemblage from the “halo” concretion surrounding a Rayonnoceras also from the type area.
		Diameters were measured for all ammonoids to evaluate potential semelparity versus catastrophic mass mortality.
	gsa.confex.com /gsa/2004AM/finalprogram/abstract_77772.htm (424 words)

	Goliath Squid by the Side of the Road \| Living World \| DISCOVER Magazine (Site not responding. Last check: 2007-10-19)
		The eight-foot-long shell was once the armor of Rayonnoceras solidiforme, a ferocious squidlike predator that occupied the top of the food chain 325 million years ago.
		They are geology students who found the nautiloid while prospecting in a drainage ditch along a highway bypass.
		Intact Rayonnoceras shells are rare; ones this big are scarcer still.
	discovermagazine.com /2003/may/breaksquid (466 words)

	PATHOLOGIC GIGANTISM IN RAYONNOCERAS SOLIDIFORME CRONEIS FROM THE LOWER FAYETTEVILLE SHALE (CHESTERIAN-MISSISSIPPIAN), ... (Site not responding. Last check: 2007-10-19)
		Both nautiloids and ammonoids exhibit "hot spot" occurrences characterized by horizons with abundant individuals of similar size separated by barren intervals suggesting semelparous accumulations.
		The actinoceratoid nautiloid Rayonnoceras solidiforme Croneis is a common element in those assemblages.
		Large numbers of mostly fragmentary, but with some complete, specimens collected over a period of nearly 100 years suggest a mature length of about one meter, and a semelparous reproductive strategy.
	gsa.confex.com /gsa/2003AM/finalprogram/abstract_66906.htm (463 words)

	Newswise
		Measuring seven feet, two inches, the 1963 fossil was believed to be the largest in existence until Monday's discovery.
		Belonging to the extinct species Rayonnoceras solidiforme, both fossil specimens would have lived during the Mississippian era, when much of the southern United States lay submerged beneath a shallow sea.
		A type of cephalopod related to the modern-day squid, these organisms normally grew no more than three to four feet in length.
	www.newswise.com /articles/view?id=FOSSIL.UAR (903 words)

	Fossil (Site not responding. Last check: 2007-10-19)
		The 1963 specimen was 7 feet, 3inches long, while the students' find would turn out to be 8 feet long.
		The find's genus and species name is Rayonnoceras solidiforme.
		Long extinct the creature was much like a squid stuffed into a shell resembling an elongated ice cream cone.
	www.pccua.edu /keough/fossil.htm (179 words)

	NMBGMR Memoir 2 (Site not responding. Last check: 2007-10-19)
		Although in the entire subfamily there is a strong resemblance to Rayonnoceras, reexaminations of the evidence suggests this relationship is homeomorphic, though a remarkable example of contemporaneous convergence.
		In spite of its resemblance to the Macroloxoceratinae, Rayonnoceras retains actinoceroid features favoring its derivation from Ormoceras.
		The remarkable new genus Macroloxoceras, on which the present study is based, first came to the attention of the writer through two specimens collected near Glenwood Springs, Colorado, by Dr. William H. MacQuown.
	geoinfo.nmt.edu /publications/memoirs/2/home.html (783 words)

	Design Science Association Video Catalog - Geology
		In the last few years remarkable headway has been made by ICR geologist, Dr. Steven A. Austin, in the study of nautiloid fossils and the beds which contain them.
		These nautiloids are of a single species of Rayonnoceras that have straight, cigar-shaped shells.
		In the Grand Canyon they are found in one thin layer in the lowest member of the Redwall limestone.
	www.pdxdsa.org /geology.html (1923 words)

	Fayetteville Shale ** The company is drilling test wells targeting the Fayetteville Shale, an unconventional gas ... (Site not responding. Last check: 2007-10-19)
		The Fayetteville Shale is Mississippian in age and is...
		PATHOLOGIC GIGANTISM IN RAYONNOCERAS SOLIDIFORME CRONEIS FROM THE LOWER FAYETTEVILLE SHALE (CHESTERIAN-MISSISSI PPIAN...
		In contrast, the upper Fayetteville Shale was deposited as a high stand...
	www.timesharelinks.com /Fayetteville/FayettevilleShale.html (1061 words)

	Cameroceras, Rayonnoceras, etc. [Archive] - TONMO.com Forums (Site not responding. Last check: 2007-10-19)
		TONMO.com Forums > Cephalopod Science > Fossils and History > Cameroceras, Rayonnoceras, etc.
		I'm looking for fossil records of large molluscs for an independent research project.
		Also, if anyone knows any others, please let me know.
	www.tonmo.com /forums/archive/index.php/t-5664.html (54 words)

	More evangelical censorchip of science - Page 2 - TheologyWeb Campus
		The platform facies of the bed with abundant nautiloids originally occupied an area of at least 1.5 x 104 km2.
		Nautiloids resemble the genus Rayonnoceras, but the siphuncle differs from any described in the literature.
		Mean length of nautiloids is 0.8 m with log-normal size distribution indicating mass kill of an entire population.
	www.theologyweb.com /forum/showthread.php?p=1856446 (1735 words)

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