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Topic: Isotelus

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	[No title]
		The center of the Isotelus hypostoma is often found separated from the two lobes.
		The pygidium, or "tail section" of the Isotelus is one contiguous plate.
		The Isotelus fragments shown are from the collections of the Dry Dredgers, an association of amateur geologists and fossil follectors.
	drydredgers.org /fragiso1.htm (523 words)

	Trilobites
		Articulated specimens are uncommon in most exposures, as it was not as robust as Isotelus gigas or Flexicalymene senaria found in the same rocks.
		Small Isotelus gigas, particularly those under 50mm long, often have genal spines but these are lost as the trilobite became larger.
		Thus, the adult Isotelus iowensis has long genal spines, extending to the fifth, sixth, or seventh segment, an axial lobe a little less than half the width of the thorax, and pygidia show a fairly convex axial lobe, and traces of ribs on the pleural lobes.
	www.mcz.harvard.edu /Departments/InvertPaleo/Trenton/Intro/PaleoPage/TrentonFauna/Arthropoda/Trilobita/Trilobita.htm (5001 words)

	Largest Trilobites (Site not responding. Last check: 2007-09-18)
		Below, depicted in scale alongside a familiar object, are some of the largest recorded specimens: Isotelus rex, the largest known species of trilobite, at nearly three quarters of a meter in length (720 mm), was found in Canada recently in a nearly complete state, and can be seen at the Manitoba Museum in Winnipeg.
		Isotelus rex is a moderately effaced asaphid trilobite lacking terminal spines or prolongations, and the holotype specimen was found in a carbonate unit showing little evidence of distortion or compaction.
		Prior to the discovery of the 720 mm Isotelus rex, the largest confirmed complete trilobite specimen was a fully articulated isoteline measuring 430 mm in length (Whittington in Kaesler, 1997).
	trilobites.info /lgtrilos.htm (571 words)

	Ohio State Fossil (Site not responding. Last check: 2007-09-18)
		Ohio's state fossil, the trilobite Isotelus, is among the largest trilobites known.
		Although over 20,000 species of trilobites are known, Isotelus was a predatory giant among its fellows, crawling along the sea floor in search of smaller creatures to feed on.
		A partial specimen of a large specimen of Isotelus was discovered during a geological survey of Ohio in 1837-38.
	www.statefossils.com /oh/oh.html (293 words)

	isotelus (Site not responding. Last check: 2007-09-18)
		Isotelus maximus, also called Isotelus metistos, was founded by John Locke near the southwestern corner of Ohio.
		Locke collected only the pygidium (tail) of the this species but by proportional comparison, he estimated the complete size of this trilobite of about 21 inches in length.
		The fossil was found in 1919 by workmen digging a tunned during the construction of the Huffman Dam.
	www.ma.iup.edu /courses/ls499/trilobite/isotelus.html (134 words)

	GeoFact No. 05, Ohio Trilobites
		Isotelus maximus is among the largest known trilobites and was named the State Invertebrate Fossil of Ohio in 1985.
		Isotelus, the state fossil, is common in Ordovician rocks in the Cincinnati area; however, most specimens are fragmentary and complete specimens are rare.
		All species of Isotelus are characterized by a low, flat profile, smooth cephalon and pygidium, eight thoracic segments, and a broad axial lobe.
	www.dnr.state.oh.us /geosurvey/geo_fact/geo_f05.htm (1386 words)

	GeoFact No. 06, Isotelus: Ohio's State Fossil
		With the signing of this bill, Isotelus joined Ohio's other official state symbols, which include the ladybug (insect), red carnation (flower), flint (gemstone), cardinal (bird), white-tail deer (animal), tomato juice (beverage), and of course, the state tree, the buckeye.
		Isotelus is known from rocks of Ordovician age, about 504 to 438 million years ago.
		Perhaps the most famous Isotelus specimen was discovered in 1919 by workmen digging an outlet tunnel during the construction of the Huffman Dam on the Mad River northeast of Dayton.
	www.ohiodnr.com /geosurvey/geo_fact/geo_f06.htm (991 words)

	Isotelus mafritzi
		The very first trilobites had spiny tails in which most or all of the tail segments were individually covered in outer shell material.
		Isotelus represents one of the later trends in trilobite evolution; simplifying the outer shell or "exoskeleton".
		Many later trilobites, including Isotelus, had an outer shell with the tail segments combined into one large, smooth tail shield or "pygidium".
	www.priweb.org /collections/arth/tril/isotelus_mafritzi.html (69 words)

	[No title] (Site not responding. Last check: 2007-09-18)
		This trilobite, Isotelus brachycephalus, measures a full 9" long and is extremely 3-D. It has been professionally prepared with the genal spines free standing.
		One of the main characteristic of the Isotelus brachycephalus is the genal spines curve outward which separates it from the more common Isotelus maximus.
		This trilobite, Isotelus gigas, is the rarest of the 3 types of Isotelus found in Indiana.
	www.weekstrilobites.com /Isotelus.htm (148 words)

	WAVES - Record 120 of 155 (Site not responding. Last check: 2007-09-18)
		In 1824 Deday erected the genus Isotelus with gigas as first named species; the type locality is the Trenton Falls gorge, New York State, United States.
		A neotype is selected from a collection made by Walcott in the Denley Formation (late Shermanian), in an excavation adjacent to the gorge.
		Isotelus gigas and an associated speces, I. walcotti Walcott, are redescribed with emphasis on the range in dimensions.
	inter01.dfo-mpo.gc.ca /WAVES_CAT/DDW?W=ABSTRACT++PH+WORDS+%27YORK%27&M=120&K=225011&R=Y&U=1 (114 words)

	Isotelus Maximus (Site not responding. Last check: 2007-09-18)
		Isotelus maximus is a sculpture of a trilobite.
		The bottom of the sculpture is a cast taken from a piece of fossiliferous limestone to which I added casts of a small trilobite, Flexicalymene meeki.
		Isotelus maximus was one of the largest trilobites that ever lived, reaching lengths of almost two feet.
	www.herrmannstudio.com /trilobyte.html (255 words)

	Feature Fossil (Site not responding. Last check: 2007-09-18)
		Isotelus latus is one of the Ordovician Period's large trilobites.
		From the shape of the injury, this is probably a bite mark from a predator.
		If the cephalon and pygidium are triangular with genal spines, odds are it is an Isotelus mafritzi, with no genal spines, odds are it is an Isotelus gigas*.
	www.fossilnews.com /2000/fftrilo/ffmay00.html (315 words)

	Journal of Paleontology: world's biggest trilobite--Isotelus Rex new species from the upper Ordovician of Northern ...
		This gigantic specimen, the holotype of Isotelus rex n.
		Isotelines (indeed, the entire family Asaphidae) did not survive the terminal Ordovician extinction crisis and the Churchill River Group fossils represent some of the last members of a widespread and moderately speciose phyletic lineage whose cryptic origins extend back into the Cambrian Period (Fortey and Owens in Kaesler, 1997).
		Large representatives of Isotelus occur elsewhere in the Late Ordovician succession of North America and some of the earliest described species were considered to be among the biggest trilobites then known.
	www.findarticles.com /p/articles/mi_qa3790/is_200301/ai_n9206566 (1233 words)

	Trilobites (Site not responding. Last check: 2007-09-18)
		One of the most abundant trilobite fossils is Flexicalymene meeki, which is typically found in the rolled-up form.
		Fossils of the large Isotelus gigas (up to 1 foot long) have also been found in the Ordovician rocks in the Blue Grass Region.
		The upper half of a large Isotelus gigas trilobite from the Ordovician of Kentucky.
	www.uky.edu /KGS/coal/webfossl/pages/trilobites.html (155 words)

	Welcome to the Garden Of Gems (Site not responding. Last check: 2007-09-18)
		This bone sample is from one of the last dinosaurs, living approximately 60-70 million years ago.
		Isotelus (Trilobite): Isotelus is a trilobite that lived in the shallow, warm sea that covered Ohio during the Ordovician period, about 440 million years ago.
		A solitary invertebrate belonging to the phylum Mollusca, characterized by a non-segmented body that is bilaterally symmetrical and by a radially or biradially symmetrical mantel and shell.
	www.gemgardens.com /other-info.asp?id=4 (196 words)

	Terminus (Site not responding. Last check: 2007-09-18)
		The cache can once again be searched for, and found by all who wish, as the hide is in the same area but has recieved a new (hopfully) muggle proof location,and a new container,with a tastful Isotelus flare.
		Isotelus is now the owner of this cache.
		On behalf of Geocaching.com, I want to thank Isotelus and all the Northwest Ohio Geocachers for their efforts in honoring Augies' memory by continuing the caches that he hid for us.
	www.geocacheohio.com /LCC/Cache/164.htm (556 words)

	Fossil Contest Comments, Answers & Results
		Perhaps the key was to choose a species of Isotelus with the authorship of Stokes, 1824.
		Some answered, Isotelus latus perhaps since some of Stokes' material was placed in this species by Wilson in 1947.
		Isotelus platycephalus is a valid species as published in modern times by Ludvigsen as well as Rudkin and Tripp.
	www.fossilhut.com /Answers.htm (645 words)

	Photographs of Fossils
		Isotelus trilobite hypostome from the Ordovician of Flemingsburg, Kentucky; 1.75 inches wide.
		Isotelus trilobite, enrolled, from Clays Ferry Fm., Ordovician, Danville Field Trip.
		Isotelus trilobite, weathered to reveal the hypostome in approximate life position, Clays Ferry Fm., Ordovician, Danville Field Trip
	www.uky.edu /OtherOrgs/KPS/pages/fossilphoto.html (1849 words)

	Pharyngula::Isotelus rex, biggest trilobite ever (Site not responding. Last check: 2007-09-18)
		I was very impressed to see this monster, Isotelus rex, an Ordovician trilobite that was over two feet long.
		Depending on your screen resolution, this image is about a third the size of the real thing, which is 700mm long by 400mm wide.
		The first animal up there is Isotelus rex, and it's comparable in size to the lobster; in fact, the largest lobster on record would have had about the same body length as I.
	pharyngula.org /index/weblog/comments/isotelus_rex_biggest_trilobite_ever (1583 words)

	Isotelus (Site not responding. Last check: 2007-09-18)
		The figure below shows the distribution of samples containing the trilobite Isotelus.
		Isotelus is a common trilobite in some parts of the MRV strata.
		The classification presented here only represents a starting point for the search for further information.
	www.priweb.org /ed/DoSci/MRV/Isotelus.html (293 words)

	Subject Category - plants, page 1
		The Cambrian Period is sometimes termed the "Age of Trilobites," because these distinctive animals make up about 60% of the period's fossil remains.
		Trilobites are so well-known in Ohio's fossil record, in fact, that the state named Isotelus, a large species of trilobite, as the official state fossil in 1985.
		The largest known complete Isoletus fossil, collected at Huffman dam in Montgomery County, was named the representative specimen.
	worlddmc.ohiolink.edu /OMP/Subject?subject=plants (450 words)

	Arthropods
		Disarticulated fragments of Isotelus maximus from the Liberty Formation.
		Arthropods are classified not only by their jointed legs, but by segmented bodies, and exoskeletons.
		Fossil fragments of Isotelus and Cryptolithus are frequently found as well as more complete specimens of Flexicalymene.
	www.wooster.edu /geology/Arthropods.html (506 words)

	Marc Behrendt - Fossil Preparation - PaleoPrep.com
		Many of the quarries where this species is collected are being closed to collectors, thus acquisition of the Canadian Isotelus will become more difficult as time moves along.
		Rather than fabricate a new one, I chose to show the bug as it is.
		This is the finest Isotelus mafritzi I have in stock.
	www.paleoprep.com /store_no_amer/013.htm (74 words)

	Arthropods
		The Walcott-Rust Quarry limestone is rich in trilobites, many of which are well studied and researched.
		Many exceptionally well preserved specimens of Isotelus gigas make up a large portion of the collection, the neotype of the species being one of them.
		Enrolled specimens of Ceraurus pleurexanthemus Green and Flexicalymene senaria Conrad are also numerous and were of significant importance to C.D. Walcott.
	www.mcz.harvard.edu /Departments/InvertPaleo/Trenton/Intro/PaleoPage/TrentonFauna/Arthropoda/Arthropoda.htm (284 words)

	New to Science (Site not responding. Last check: 2007-09-18)
		It was swept to its death in the deeper waters by a submarine sediment slide.
		One species of Isotelus (Isotelus rex) is the world’s largest trilobite, which grew to an enormous 70cm (28 inches) in length (the world’s smallest trilobite (Bynumina) is a mere 1mm (1/25th of an inch) in length).
		Another species of Isotelus (Isotelus maximus) is so well known in Ohio, USA, that it has become their state fossil!
	www.hunterian.gla.ac.uk /Archives/george_rae/science.html (142 words)

	Paleo Connections.com ~ A Paleontological Window into the Past!
		The background image is an composite of the following trilobites: Isotelus (Ordovician), Eomonarachus (Ordovician), Phacops (Devonian), and Proetus (Mississippian).
		Isotelus, Eomonarachus and Proetus were drawn by Guy Darrough from his Quality Collections series.
		Phacops was drawn by Joanne Kluessendorf from a trilobite article issued by the Paleontological society in 1996.
	www.angelfire.com /mo2/Dino5/index.html (121 words)

	replica
		You pay the actual shipping and handling cost on all orders.
		Isotelus maximus 16" (original on right, replica on left) $429.00
		Double Isotelus maximus 3" and 4 1/2" $69.00
	phacops.homestead.com /replica.html (51 words)

	Pleurocystites couple ... cystoids, Ontario, Canada (Site not responding. Last check: 2007-09-18)
		This is a beautiful three-dimensional specimen of Isotelus mafritzae from the Upper Ordovician Cobourg Formation.
		There has been no reconstruction; it was prepared at the paleo-lab.
		Type B is the variety of the species that do not possess genal spines.
	www.fossilhut.com /Isotelus.htm (81 words)

	Danville Field Trip
		Isotelus trilobite, weathered to reveal the hypostome in approximate life position, Clays Ferry Fm.
		A crinoid garden (Ectenocrinus) was found, but has since been destroyed by the quarry.
		Whole trilobites (Isotelus), both stretched out and enrolled, have been found in the Clays Ferry.
	www.uky.edu /OtherOrgs/KPS/pages/danville.html (341 words)

	EduSolution - NYS Regents Exams
		The new Isotelus species existed just before the end of the Ordovician Period.
		52 At the time the new Isotelus fossil lived and died, during the Ordovician
		Period, what was the approximate latitude of the fossil site according to
	www.edusolution.com /regentsexams/earthscience/jan2004/page11.htm (229 words)

	[No title] (Site not responding. Last check: 2007-09-18)
		There were quite a large number of Flexicalymene and Isotelus trilobites found by both diggers and surface collectors.
		Within the first 15 minutes of surface collecting, Joe Mueller found three Flexicalymene, an Isotelus genal spine and a Cyclonema Gastropod.
		There is lots of clay on this specimen, but it will all come off with a little water.
	www.drydredgers.org /mtob4.htm (199 words)

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