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Topic: Nautiloidea

Related Topics

Ammonoidea

Nautilus

Nautilida

Belemnoidea

Cephalopoda

Cephalopod

Hyponome

Chambered Nautilus

Argonauta

Vampyromorphida

Gryphaea

Spirulida

Coleoidea

Crustacean

Opisthobranchia

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	Nautiloidea (Site not responding. Last check: 2007-10-22)
		The "Subclass Nautiloidea" refers to a broad assemblage of molluscs that includes all Cephalopods other than Ammonoids and Coleoids.
		Generally, Nautiloidea is retained as a general catch-all for all cephalopods that are not ammonoids or coleoids.
		However the subclass Nautiloidea does appear to be partially equivalent to the paraphyletic group "Palcephalopoda."
	www.palaeos.com /Invertebrates/Molluscs/Cephalopoda/Nautiloidea.htm (443 words)

	Cephalopod - Wikipedia, the free encyclopedia
		In the Coleoidea, the mollusk shell has been internalized or is absent; this subclass includes the octopuses, squids, and cuttlefish.
		The Nautiloidea stick to iteroparity; they produce a few large eggs in each batch and live for a long time.
		The class developed during the late Cambrian and were during the Paleozoic and Mesozoic dominant and diverse marine life forms.
	en.wikipedia.org /wiki/Cephalopod (691 words)

	The Palcephalopod/Neocephalopoda Hypothesis (Fossil Nautiloidea) (Site not responding. Last check: 2007-10-22)
		The Ammonoidea were at that time often grouped together with the Nautiloidea in a supraordinated taxon Ectocochleata (usually on subclass level) which was the sister-group of the Endochochleata (now commonly called Coleoidea).
		In contrast to the Nautiloidea it is never directly attached to the apex of the first chamber.
		The second lineage of the Cephalopoda are the Palcephalopoda Lehmann and Hillmer, 1980 or Nautiloidea s.l.
	userpage.fu-berlin.de /~palaeont/fossilnautiloidea/fossnautpalneocephalopoda.htm (1897 words)

	cephalopod (Site not responding. Last check: 2007-10-22)
		In the Coleoidea, the mollusc shell has been internalized or is absent; this subclass includes the octopuses, squids, and cuttlefish.
		In the Nautiloidea the shell remains; this subclass includes the nautilus.
		The ancient (cohort Belemnoidea) and modern Coleoidea (cohort Neocoleoidea) diverged from the external shelled Nautiloidea around 425 million years ago.
	www.yourencyclopedia.net /Cephalopod.html (372 words)

	Nautiloidea Description and Ecology
		Nautiloidea is a large subclass of the cephalopods.
		The modern nautilus (of the Nautiloidea) for example has wavy brown bands on its topside, and white on its underside.
		The nautiloidea had straight or only slightly sinuous sutures with a few exceptions such as Aturia, which has ìundulatory patterns that resemble goniatitic sutures (Levin, 1999).î
	www.earth.rochester.edu /ees207/Nautiloidea/becky_naut3.html (677 words)

	Palaeos Invertebrates: Mollusca: Cephalopoda: The Cephalopods (Site not responding. Last check: 2007-10-22)
		All these early forms are classed under the paraphyletic and probably artificial taxon Nautiloidea.
		Certainly the Nautiloidea appear to be not a single subclass but a very amorphous, paraphyletic group, so much so that the term Nautiloidea now really means "all cephalopods that are not ammonoids or coleoids"
		Thus, while there is some agreement regarding recent cephalopods, the classification of the various extinct forms is very uncertain, precisely due to this fact that (with one or two rare exceptions known from the Devonian, and a Jurassic ammonite that preserved muscle attachment scars) the soft body parts are not known.
	www.palaeos.com /Invertebrates/Molluscs/Cephalopoda/Cephalopoda.htm (1559 words)

	Ammonites
		This means that their shell is all one piece; unlike the bivalve clams and oysters, whose shells are in two pieces, held closed by the muscles of the animal.
		The septae are secreted by the animal: as it grows, it moves forward in the shell, secreting the septa behind it and separating off a new chamber.
		The Nautiloidea are found in the fossil record as far back as the Cambrian Period (570 to 500 million years ago).
	www.suite101.com /article.cfm/paleontology/28515 (470 words)

	Specimens - Cephlapod Slab
		The fossils are said to be "incomplete" because several of the outer chambers are missing.
		The straight fossils are of the Subclass Nautiloidea.
		Unique to this slab is the presence of both ammonites and straight nautiloids.
	www-lib.ou.edu /etc/geology/cephlapod.asp (101 words)

	geoahead: Earth Science on your desktop (Site not responding. Last check: 2007-10-22)
		The body consists of a single shell with the front end of the foot developing a series of tentacles that surround the head.
		We will study features and evolution of cephalopods under three subheads representing the three subclasses Nautiloidea, Ammonoidea and Coleoidea.
		Nautiloids occur in rocks over a wide range of ages from Cambrian to Recent.
	www.geoahead.com /palaeo/cephalopod.cfm (415 words)

	ammonites (Site not responding. Last check: 2007-10-22)
		The ammonites are members of the Class Cephalopoda, whose members include the octopi, squids and Sub-Class Nautiloidea which includes the modern Nautilus.
		This means their shell is in one piece, unlike the clams and mussels which are bivalves.
		The shells of the Nautiloidea are divided internally into a series of chambers by thin walls called septa.
	www.riroe.k12.il.us /riroe/science/fossillab/ammonites.html (170 words)

	Cincinnatian Cephalopods
		Cephalopoda -- General features -- Endoceratoidea -- Actinoceratoidea -- Nautiloidea -- Bactritoidea: Geological Society of America, and University of Kansas Press, New York, New York and Lawrence, Kansas, p.
		A., and C. Faber, 1894a, New species of fossils from the Hudson River Group, and remarks upon others: Journal of the Cincinnati Society of Natural History, v.
		Sweet, Walter C., 1964, Nautiloidea -- Barrandeocerida: Treatise on Invertebrate Paleontology.
	inside.msj.edu /academics/faculty/davisr/cintian/cephalop.htm (1383 words)

	Picture of the Week: Nautilus
		The ancient ancestors of the octopus, squid and cuttlefish had external shells, just like other molluscs, for example snails, do today.
		The Nautiloidea first appeared in the Cambrian period (c.570 - 510 Million Years Ago) and were once, along with the now extinct ammonoids, major marine carnivores.
		Today, only a few shelled cephalopods survive, and the chambered Nautilus is the best known.
	www.imagequest3d.com /pages/current/pictureoftheweek/nautilus (184 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		It is commonly found on the Texas coast.
		Class Cephalopoda Subclass Nautiloidea Nautilus The “Chambered Nautilus” is the most primitive of living cephalopods.
		The only extant cephalopod with an external shell, it is pelagic, and lives in the Pacific.
	biocourse.bio.tamu.edu /graduate-students/scott/LAB7.doc (1521 words)

	Cincinnatian Fossils ----- Generic Index
		Danoceras Troedsson, 1926 -----> Mollusca, Cephalopoda, Nautiloidea, Oncocerida
		Zitteloceras Hyatt, 1884 -----> Mollusca: Cephalopoda: Nautiloidea: Oncocerida
		There have been published quite a number of faunal lists and indices to type-Cincinnatian rocks, many of them produced by "members" of what has been called "The Cincinnati School of Paleontology".
	inside.msj.edu /academics/faculty/davisr/cintian/alphtaxa.htm (1056 words)

	MOLLUSCA - Online Information article about MOLLUSCA (Site not responding. Last check: 2007-10-22)
		The Cephalopoda, however, do not harmonize so well with this view.
		The earliest forms of this class geologically are the Nautiloidea.
		Assuming that these ancestral forms resembled the existing Nautilus in their internal anatomy, they had two pairs of renal ducts and one pair of genital ducts, which would apparently indicate, not a single metamere or unsegmented body, but three metameres.
	encyclopedia.jrank.org /MIC_MOL/MOLLUSCA.html (5999 words)

	Exciting Cephalopods
		There are three subclasses of cephalopods: Coleoidea, Nautiloidea, and Ammonoidea, which is extinct.
		Our conservation issues focus on the superorders Decapodiformes (squids and cuttlefishes) and Octopodiformes (octopuses), which are part of the subclass Coleoidea.
		This website is part of a Biology 26 class project on the conservation of global biodiversity.
	www.earlham.edu /~merkeka/exciting_cephalopods.htm (1320 words)

	[No title]
		Cephalopods have been among the dominant large predators in the ocean at various times in geological history.
		Two groups of cephalopods exist today: The Nautiloidea with a few species of the pearly nautilus, and the Coleoidea, containing the squids, cuttlefishes, octopods and vampire squids, which is represented by about 700 species.
		Cephalopods are the most active of the molluscs and some squids rival fishes in their swimming speed.
	ag.arizona.edu /tree/eukaryotes/animals/mollusca/cephalopoda/Cephalopoda.nex (954 words)

	Squid -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-22)
		Individual species of squid are found abundantly in certain areas and provide large catches for (Click link for more info and facts about fisheries) fisheries.
		Subclass (Click link for more info and facts about Nautiloidea) Nautiloidea: nautilus
		Superorder (Click link for more info and facts about Decapodiformes) Decapodiformes
	www.absoluteastronomy.com /encyclopedia/s/sq/squid.htm (1055 words)

	Cephalopod - Nautilus Shell
		Click here to do a keyword search for images.
		: mollusca, molluscs, cephalopoda, caphalopods, nautiloidea, nautilidae, chambered shell, living fossils, planispiral
		For Terrestrial Images visit our sister library by clicking on the flower below.
	www.imagequest3d.com /catalogue/macromarine/pages/m005_jpg.htm (94 words)

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