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| | Cephalopoda |
 | | <==o Cephalopoda Cuvier, 1797 (cephalopods; pääjalkaiset, mustekalat) -- †Ellesmeroceroida `--o Palcephalopoda [Nautiloidea sensu lato] [incl. |
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http://www.fmnh.helsinki.fi/users/haaramo/Metazoa/Protostoma/Mollusca/Cephalopoda/Cephalopoda.htm
(316 words)
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| | Nautiloidea |
| | Infraclass Nautiloidea Agasiz, 1947 (= Nautiloidea "strictu sensu") | | | The "Subclass Nautiloidea" refers to a broad assemblage of molluscs that includes all Cephalopods other than Ammonoids and Coleoids. | | | Key features which are very important in nautiloid classification are the internal and external structure of siphuncle and the type of internal (cameral and siphuncal) calcareous "ballast" deposits. |
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http://www.palaeos.com/Invertebrates/Molluscs/Cephalopoda/Nautiloidea.htm
(443 words)
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| | Coleoidea |
| | Some species have lost their bone altogether, while in some it has been replaced by a cartilaginous support structure. | | | Unlike its sister group the Nautiloidea, which has a rigid outer shell for protection, the coleoids have at most an internal bone or shell that is used for buoyancy or support. |
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http://www.usedaudiparts.com/search.php?title=Coleoidea
(178 words)
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| | Palaeos Invertebrates: Mollusca: Cephalopoda: The Cephalopods |
| | Infraclass Nautiloidea Agassiz, 1947 (= Nautiloidea "sensu stricto") | | | 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. |
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http://www.palaeos.com/Invertebrates/Molluscs/Cephalopoda/Cephalopoda.htm
(1559 words)
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| | Nautiloidea Description and Ecology |
| | Cephalopods developed several ways of dealing with this, we will discuss only the two most prominent in the nautiloidea here. | | | Nautiloidea is a large subclass of the cephalopods. | | | Please keep in mind that there are other ways to fix this problem (see diagram for more details). |
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http://www.earth.rochester.edu/ees207/Nautiloidea/becky_naut3.html
(677 words)
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| | MOLLUSCA - Online Information article about MOLLUSCA |
| | 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. | | | The Cephalopoda, however, do not harmonize so well with this view. | | | The earliest forms of this class geologically are the Nautiloidea. |
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http://encyclopedia.jrank.org/MIC_MOL/MOLLUSCA.html
(5999 words)
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| | Exciting Cephalopods |
| | Our conservation issues focus on the superorders Decapodiformes (squids and cuttlefishes) and Octopodiformes (octopuses), which are part of the subclass Coleoidea. | | | There are three subclasses of cephalopods: Coleoidea, Nautiloidea, and Ammonoidea, which is extinct. | | | This website is part of a Biology 26 class project on the conservation of global biodiversity. |
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http://www.earlham.edu/~merkeka/exciting_cephalopods.htm
(1320 words)
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| | Cincinnatian Fossils ----- Generic Index |
| | Cyrtoceras tenuiseptatum (no such species in Bassler 1915; but see Manitoulinoceras tenuiseptum) | | | 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". | | | Gorbyoceras Shimizu and Obata, 1935 -----> Mollusca, Cephalopoda, Nautiloidea, Orthocerida |
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http://inside.msj.edu/academics/faculty/davisr/cintian/alphtaxa.htm
(1056 words)
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| | The Palcephalopod/Neocephalopoda Hypothesis (Fossil Nautiloidea) |
| | 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). | | | This feature might also be interpreted as an apomorphic feature. | | | The Lateradulata roughly correspond with the term Nautiloidea s.l. |
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http://userpage.fu-berlin.de/~palaeont/fossilnautiloidea/fossnautpalneocephalopoda.htm
(1897 words)
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| | Ammonites |
| | Cephalopoda means "head foot", referring to the fact that their mouths are surrounded by their tentacles, so their head and "feet" are both in the same place. | | | 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. | | | This, the shape of the shell, and any ornamentation are used to group the Nautiloidea into families and genera. |
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http://www.suite101.com/article.cfm/paleontology/28515
(470 words)
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| | Cephalopod - Wikipedia, the free encyclopedia |
| | The class developed during the late Cambrian and were during the Paleozoic and Mesozoic dominant and diverse marine life forms. | | | In the Coleoidea, the mollusk shell has been internalized or is absent; this subclass includes the octopuses, squids, and cuttlefish. | | | The ancient (cohort Belemnoidea) and modern Coleoidea (cohort Neocoleoidea) diverged from the external shelled Nautiloidea around 425 million years ago. |
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http://en.wikipedia.org/wiki/Cephalopod
(691 words)
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| | Gastropods and Cephalopod notes |
| | (Previously the Subclass Nautiloidea was divided into several subclasses.) The position of the Bactritiodea is somewhat variable. | | | Some authors include these fossils in the Subclass Nautiloidea, others place them in the Subclass Ammonoidea (as does your text), others place them in a separate subclass (this would result in four subclasses). |
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http://www.uwm.edu/People/mtharris/Paleo/RN26.html
(804 words)
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| | geoahead: Earth Science on your desktop |
| | 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. |
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http://www.geoahead.com/palaeo/cephalopod.cfm
(415 words)
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| | What we don't know about nautilus |
| | Two subclasses, the Nautiloidea (late Cambrian to present) and Ammonoidea (Devonian to Cretaceous) were commonly found in the world's oceans and ranged greatly in size and morphology. |
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http://www.bonus.com/contour/Cephalopod/http@@/is.dal.ca/~ceph/TCP/tentacle.html
(653 words)
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| | MavicaNET - Invertebrate Paleontology |
| | Web pages concentrating on the science of paleolimnology and the study of diatom algae. | | | The site for people interested in fossil Nautiloidea. |
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http://www.mavicanet.com/lite/bel/10053.html
(257 words)
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| | fossils.captain.at - Fossils in Austria - Ammonites, Nautilus, Belemnites, Ammonoidea, Nautiloidea, Cephalopods |
| | fossils.captain.at - Fossils in Austria - Ammonites, Nautilus, Belemnites, Ammonoidea, Nautiloidea, Cephalopods | | | A short presentation of fossils - found in Austria |
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http://fossils.captain.at
(30 words)
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| | [No title] |
| | 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. | | | It is commonly found on the Texas coast. |
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http://biocourse.bio.tamu.edu/graduate-students/scott/LAB7.doc
(1521 words)
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| | Utah Fossil Cephalopod list (Systematic) |
| | A new classification of Class Cephalopoda would put Endoceroidea, Actinoceroidea and most of the Nautiloidea into a group (Subclass?) | | | Fossil Nautiloidea Page web site of T. Engeser for his discussion. |
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http://www.ammonoid.com/ufc-list.htm
(113 words)
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| | Cincinnatian Cephalopods |
| | This web-page was constructed using MS-Word 2000 and its version of html. | | | 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. | | | James, Joseph F., 1886, Cephalopoda of the Cincinnati Group: Journal of the Cincinnati Society of Natural History, v. |
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http://inside.msj.edu/academics/faculty/davisr/cintian/cephalop.htm
(1383 words)
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| | 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. |
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http://www.imagequest3d.com/pages/current/pictureoftheweek/nautilus
(184 words)
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| | Specimens - Cephlapod Slab |
| | Unique to this slab is the presence of both ammonites and straight nautiloids. | | | The straight fossils are of the Subclass Nautiloidea. | | | The fossils are said to be "incomplete" because several of the outer chambers are missing. |
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http://www-lib.ou.edu/etc/geology/cephlapod.asp
(101 words)
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| | [No title] |
| | 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. | | | Cephalopods have been among the dominant large predators in the ocean at various times in geological history. |
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http://ag.arizona.edu/tree/eukaryotes/animals/mollusca/cephalopoda/Cephalopoda.nex
(954 words)
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| | Squid -- Facts, Info, and Encyclopedia article |
| | 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 |
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http://www.absoluteastronomy.com/encyclopedia/s/sq/squid.htm
(1055 words)
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| | Nautilus - Wikipedia, the free encyclopedia |
| | The five nautilus species are the sole living members of the Nautiloidea subclass in the order Nautilida. | | | The nautilus is a marine creature of the class Cephalopoda. |
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http://en.wikipedia.org/wiki/Nautilus
(645 words)
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| | Cretaceous Fossils: Nautiloids Index |
| | The classification scheme is based on several authors: | | | Miller, A. K.; Harris, R. North American Cymatoceratidae (Mesozoic Nautiloidea). |
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http://www.cretaceousfossils.com/invertebrates/nautiloids/nautiloids_index.htm
(54 words)
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| | Fossil Nautiloidea Page |
| | The Page for People Interested in Fossil Nautiloidea |
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http://userpage.fu-berlin.de/~palaeont/FOSSNAUT.HTM
(30 words)
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| | Cephalopod - Nautilus Shell |
| | Click here to do a keyword search for images. | | | For Terrestrial Images visit our sister library by clicking on the flower below. | | | : mollusca, molluscs, cephalopoda, caphalopods, nautiloidea, nautilidae, chambered shell, living fossils, planispiral |
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http://www.imagequest3d.com/catalogue/macromarine/pages/m005_jpg.htm
(94 words)
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| | Nautiloids bibliography |
| | Flower, R. H., and Kummel, B., Jr., 1950, A classification of Nautiloidea: Journal of Paleontology, v. |
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http://www.talkorigins.org/origins/biblio/nautiloids.html
(61 words)
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| | [No title] |
| | Subclass Nautiloidea - Nomenclature & Taxonomy - The Taxonomicon |
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http://sn2000.taxonomy.nl/Taxonomicon/TaxonName.aspx?id=40089&showSyn=1
(9 words)
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