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Topic: Endoceras


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  Endoceras - Wikipedia, the free encyclopedia
Some long-shelled forms like Endoceras and Cameroceras attained lengths as much as 3.5m (11 ft 8 in) - among the largest mollusc shells known.
These giant orthoconic nautiloids are rare in the fossil record.
But even the brevicones were weighed down by the heavy siphuncle and endoconic ballast and were unlikely to have been able to move very rapidly.
en.wikipedia.org /wiki/Endoceras   (419 words)

  
 InfoHub - Endoceras - An Ordovician Nautiloid   (Site not responding. Last check: 2007-11-01)
Endoceras was a genus of Nautiloids that lived during the Ordovician (488-444 million years ago).
It was a straight shelled Nautiloid and is believed to have sometimes reached a length of 3.5 m.
Fossils of Endoceras have been found in North America (both Canada and the U.S.) and in Europe, for example in Norway and Sweden.
www.infohub.com /forums/printthread.php?t=6752   (267 words)

  
 Cephalopods
Endoceras proteiforme Hall, 1847- Description from Flower, 1955
Cross section is slightly wider than high in the mature portion, but compressed in cross section in the young portion.
Endoceras is similar to Cameroceras, but with annulations varying from low and closely spaced to well elevated and distinctly apart.
www.mcz.harvard.edu /Departments/InvertPaleo/Trenton/Intro/PaleoPage/TrentonFauna/Mollusca/Cephalopoda/Cephalopoda.htm   (1227 words)

  
 [No title]
The gasteropods now developed all the leading types of shell (Pleurotomaria, Omphalotrochus) ; but both this class and the pelecypods (Lyrodesma, Ctenodonia, Modiolopsis) were subordinate in importance to the cephalopods.
These mollusks were probably the most powerful living creatures in the Ordovician seas; straight-shelled, slightly curved, and nautiloid forms predominated (Orthoceras, Cyrtoceras, Gyroceras, Trocholites, Endoceras, Litoceras, Lituites, Actinoceras).
Some of the straight shells were of enormous size, 12 to 15 ft. long and as much as 1 ft. in diameter, in the widest part.
encyclopedia.jrank.org /correction/edit?locale=en&content_id=49785   (1782 words)

  
 TONMO.com Forums - [Images] Reconstructions of Ammonoids and Nautiloids
The shell of Endoceras is absolutely typical of the orthoconic nautiloids and consists of a characteristic long conical shell composed of a series of interlinked cones (endocones) connected with a sub-ventral siphuncle.
Endoceras probably reached at least 3.5m in length, but some other members of the Endoceratidae (e.g Cameroceras) may have reached much larger sizes.
Such a shell shape allowed Endoceras to cut through the water at great speed as it would have minimised drag, though it may have not been especially manouverable.
www.tonmo.com /forums/printthread.php?t=3684   (2741 words)

  
 Palaeos Metazoa: Mollusca: Cyrtosoma: Cephalopoda: Endocerida
During the middle Ordovician some long-shelled forms like Endoceras and Cameroceras attained lengths of 4 to as much as 10 meters - among the largest molluscan shells ever.
The relatively small living chamber and capacious siphuncle indicates that much of the visceral mass of the animal may have been housed within the siphuncle itself, unlike other nautiloids in which the body is located in the living chamber.
Without doubt these large animals were the superpredators of the Ordovician, drifting slowly through the water column, probably close to the sea bottom where they could easily snatch an unwary trilobite or crustacean.
www.palaeos.com /Invertebrates/Molluscs/Cyrtosoma/Cephalopoda/Endocerida.html   (759 words)

  
 Nautiloid   (Site not responding. Last check: 2007-11-01)
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.
Specimens of the Ordovician nautiloid Endoceras have been recorded measuring up to 3.5 meters (13 feet) in length.
These large nautiloids must have been formidable predators of other marine animals at the time they lived.
pda.molinu.com /wiki/en/na/Nautiloid.htm   (1528 words)

  
 NPS Publications: Geology of Rocky Mountain NP   (Site not responding. Last check: 2007-11-01)
The Ordovician deposits of this region or any other, have yielded no proven record of either land animals or plants.
The invertebrates continued to dominate the marine waters, the most common groups being the brachiopods, the now extinct graptolites, bryozoa, true corals, crinoids and the cephalopod, Endoceras.
The most notable advance in the life of this period is seen in the occurrence of very primitive fishes.
www.cr.nps.gov /history/online_books/berkeley/effinger2/effinger2g.htm   (2687 words)

  
 Ancient Life Text - NYS Museum   (Site not responding. Last check: 2007-11-01)
This fragment of the endoceroid Endoceras annulatum ("en-doss-ur-us an-you-latt-um") came from 470 million-year-old tropical sea limestones at Watertown, New York.
Although armed with the tentacles and sharp beaks of squids, endoceroids were slow- moving.
Endoceras, New York's top Ordovician predator, was "slow and dumb" compared to modern squids.
www.nysm.nysed.gov /education/teacher/ancient_life_text.html   (11253 words)

  
 Cincinnatian Cephalopods
Cameroceras inaequabile (S. Miller, 1882) Bassler, 1915 [originally Endoceras inaequabile]
188, Colpoceras is based on suphuncle-fragments and probably is a junior synonym of Cameroceras or Endoceras.)
type-species: Endoceras annulatum Hall, 1847; S.D., S. Miller, 1889 (fide Teichert, 1964, p.
inside.msj.edu /academics/faculty/davisr/cintian/cephalop.htm   (1383 words)

  
 Minnesota PaleoWeb: Cephalopods
With the arrival of large fish in the Devonian, they must have faced new competition in their position at or near the top of the food chain.
Following is a series of pictures involving my reconstruction of a highly fragmentary cephalopod, probably an Endoceras.
I did this strictly for personal reward -- certainly not for profit.
www.tc.umn.edu /~brams006/mnpaleo/cephalopods.html   (554 words)

  
 Le Blog Bérubé
The ballot initiative will include language required the state to accept a Kansans gift of an audax fossil, valued at $10 million.
Minnesota, the giant nautiloid, Endoceras proteiforme, suggested by PZ Myers because Castoroides ohioensis the giant beaver named after somebody else’s state wasn’t good enough for Minnesota.
Readers, choose from among the 52 fossils ever found in New Hampshire.
www.michaelberube.com /index.php/weblog/fossils_are_winners_contest_results   (417 words)

  
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oldach.net /food/grizzler/poimenics   (408 words)

  
 Ammonites Mode of Live
An ammonite (Placenticeras) found in the Pierre Shale of South Dakota bears the signs of bites produced by a mosasaur, a giant marine reptile of the Late Cretaceous.
This are Endoceratids (Endoceras) a possible ancestor, giant straight-shelled nautiloids up to 8 meters in length.
On the left graphics an open worked cutaway model.
www.ammonites.dutchweb.nl /Pages/modeoflive.html   (324 words)

  
 Chapter 17  FOSSILS AND STRATA Part 3
Small sea life: (5) Giant trilobites up to 18 [45.72 cm] inches long, with none alive today, and the creatures now living and most similar to them are quite small.
(6) Fifteen-foot [457 cm] long straight-shelled cephalopods (Endoceras proteiforme), and 9-foot [274 cm] sea-scorpions (Euryprids) once lived.
Nothing of such immense sizes is found among them today.
evolution-facts.org /Ev-V2/2evlch17c.htm   (5950 words)

  
 Overpreoccupation Menorhynchous   (Site not responding. Last check: 2007-11-01)
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www.virtualworlds.de /misc/Spaced/computers/noncommutative/anti-Judaic   (291 words)

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