ammonite
From: The Columbia Encyclopedia, Sixth Edition
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Date: 2008
ammonite , one of a type of extinct marine cephalopod mollusk, related to the nautilus and resembling it in having an elaborately coiled and chambered shell. Unlike the interiors of nautilus shells, the chambers of ammonite shells display intricately shaped septa and sutures. The type included numerous species, which were widely distributed during the Mesozoic era, about 200 million years ago. Ammonites are classified in the phylum Mollusca , class Cephalopoda, subclass Ammonoidea.
Author not available, AMMONITE.,
The Columbia Encyclopedia, Sixth Edition 2008
The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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Related articles from HighBeam Research:
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The function of the ammonite fluted septal margins
Journal of Paleontology; 1/1/2002; Lewy, Zeev; 6052 words;
ABSTRACT-The fluted margins of ammonite septa were thought to resist the hydrostatic ... Saunders (1995) analyzed Paleozoic ammonites suture patterns and raised doubts on ... scarce. This contradicts the abundance of ammonites in shelf sediments not as shoreward drifted ...
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Size patterns through time: The case of the early Jurassic ammonite radiation
Paleobiology; 10/1/2002; Dommergues, Jean-Louis; Montuire, Sophie; Neige, Pascal; 5681 words;
Abstract.-The shell size of 1236 ammonite species representing all known Early ... of the Jurassic (28 Myr), during which ammonites recovered from the crisis at the Triassic ... giants") exists for all Early Jurassic ammonites; (2) although there are no sustained ...
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ALBIAN AMMONITE FAUNAS FROM PERU: THE GENUS NEODESHAYESITES CASEY, 1964
Journal of Paleontology; 5/1/2005; Robert, Emmanuel; Bulot, Luc Georges; 4745 words;
INTRODUCTION OUR UNDERSTANDING of the Cretaceous ammonite succession of Peru is mainly based on ... the basis for a revision of the Albian ammonite faunas of this country. In contrast to ... study concentrates on the Early Albian ammonites from the Inca Formation of northern Peru ...
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MIDDLE ALBIAN (LOWER CRETACEOUS) GASTROPLITINID AMMONITES AND DINOFLAGELLATES FROM THE CHRISTOPHER FORMATION (DRAGON MOUNTAIN, AXEL HEIBERG ISLAND, CANADIAN ARCTIC ISLANDS) AND A REVISION OF THE GENUS PSEUDOGASTROPLITES JELETZKY, 1980
Journal of Paleontology; 3/1/2005; Hall, Russell L; Macrae, R Andrew; Hills, L V; 9490 words;
... large sample of excellently preserved ammonites from concretions concentrated at a single ... recognizing a new species of the boreal ammonite genus Pseudogastroplites (P. draconensis ... INTRODUCTION ALBIAN GENERA belonging to the ammonite subfamily Gastroplitinae Wright, 1952 ...
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AMMONITE EXPANDS ITS SERVICES TO INCLUDE EXPLORATION FINANCING
Hart's Petroleum Finance Week; 1/6/2003; 355 words;
Beginning this year, Ammonite Resources--a long-established technical ... capital for exploration projects. Ammonite will work with companies trying to ... capital--up to $100 million or more. Ammonite is comfortable with evaluating exploration ...
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Fabrication and function of ammonite septa-comment on Lewy
Journal of Paleontology; 7/1/2003; Checa, Antonio G; 1506 words;
... muscular-attachment hypothesis for the function of the ammonite septal suture, namely, that of fastening ... complexity is an index of how active the ammonite was as a carnivore. He followed Henderson ... keep function and fabrication of the ammonite septum separate though related concepts ...
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NEW UPPER TITHONIAN (JURASSIC) AMMONITES FROM THE CHINAMECA FORMATION IN SOUTHERN VERACRUZ, EASTERN MEXICO
Journal of Paleontology; 3/1/2006; Cantú-Chapa, Abelardo; 13066 words;
ABSTRACT- Upper Tithonian (Jurassic) ammonites occur in the Chinameca Formation at Chinameca ... and biostratigraphically significant ammonite in the Chinameca fauna and its age significance ... Ataxioceratidae and Lithacoceratidae. The Chinameca ammonites have affinities with taxa of the same ...
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Archaeologically recovered ammonites: Evidence for long-term continuity in Nitsitapii ritual
Plains Anthropologist; 5/1/2002; Peck, Trevor R; 11307 words;
... from the other chambers; it is these ammonite segments that are frequently recovered by Native people (Figure 1). AMMONITES IN TRADITIONAL SOCIETY Ammonites have been frequently recovered from archaeological ... inhabiting the northern Plains using ammonites for a variety of purposes. No First ...
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Recurrences of hypotheses about ammonites and Argonauta
Journal of Paleontology; 7/1/2003; Hewitt, Roger A; Westermann, Gerd E G; 4319 words;
... by Lewy (1996, 2000, 2002). His nude-ammonites-became-octopods thesis goes back to Suess ... grew an epipelagic shell to replace the ammonite shells when they were no longer available ... these and similar hypotheses relating to ammonite body-chambers, septal sutures and possible ...
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Allometric and fractal exponents indicate a connection between metabolism and complex septa in ammonites
Paleobiology; 4/1/2005; Pérez-Claros, Juan Antonio; 5507 words;
... Sutural perimeters of 301 Late Jurassic ammonites scale as the 3/8 power of phragmocone ... of these results strongly suggest that ammonite septa were involved in more than a simple ... 170 years of persistent debate, the "ammonite suture problem," as outlined by Saunders ...
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A NEW EARLY SINEMURIAN (JURASSIC) AMMONITE SPECIES FROM THE TASEKO LAKES MAP AREA, BRITISH COLUMBIA, CANADA
Journal of Paleontology; 7/1/2005; Macchioni, Francesco; Smith, Paul L; Tipper, Howard W; 3182 words;
... assemblage found in the olistolith, where the ammonite association indicates an age corresponding ... Turneri Zone of the Northwest European ammonite zonation, a time interval not well represented ... the upper Little Paradise Member. The ammonites that are the focus of our study were ...
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Ammolite. (Exquisite Gems).(the nautilus-like ammonite)
JQ; 1/1/2003; Stebbins, Dan; 406 words;
... of prehistoric seas, the nautilus-like ammonite enjoyed a long existence before joining ... discovered the unrivaled beauty of the ammonite's fossilized shell and they are finding ... found in Cretaceous shales. While the ammonite fossil is found in many parts of the ...
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THREE NEW SPECIES OF THE HETTANGIAN (EARLY JURASSIC) AMMONITE SUNRISITES FROM BRITISH COLUMBIA, CANADA
Journal of Paleontology; 1/1/2008; Longridge, L M; Smith, P L; Pálfy, J; Tipper, H W; 8499 words;
... Switzerland. HILLEBRANDT, A. VON. 2002. Ammoniten aus dem oberen Sinemurium von Sudamerika ... 71-102. IMLAY, R. W. 1981. Early Jurassic ammonites from Alaska. U.S. Geological Survey Professional ... L. SMITH, AND H. W. TIPPER. 1994. An ammonite zonation for the Toarcian (Lower Jurassic ... 942. KMENT, K ... .
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Idanoceras, a new heteromorph ammonite genus from the Late Albian of Eastern Australia
Journal of Paleontology; 9/1/2002; Henderson, Robert A; McKenzie, E Donald; 3196 words;
... continent (see Frakes et al., 1987). Ammonites of this age are common but their generic ... Labeceratidae occupied the niches available to ammonites of heteromorph morphology in the Australian ... group of Valanginian-Aptian heteromorph ammonites. SYSTEMATIC PALEONTOLOGY Suborder ANCYLOCERATINA ...
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A Mangyan ammonite.(Landscape)
Manila Bulletin; 1/5/2006; 689 words;
... refresh my memory, he said, I brought that ammonite ... . But of course, that fabulous ammonite! Antoon Postma, a Dutchman who was assigned ... National Museum in 1963, to donate an enormous ammonite that had come to his possession. The anthropologists ...
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