
	Where results make sense

Topic: Lazarus Taxa

Related Topics

Fossil record

Echothiophate

Wizard of Yendor

Fairfield Township, Lenawee County, Michigan

Chain termination method

Ferny Grove railway line, Brisbane

Glenfiddich

Club Brugge KV

1st IAAF World Athletics Final

Morrill Act of 1890

Beretta 92FS Compact L

Medicine Hat, Alberta

Orphen

Wide angle lens

In the News (Sun 7 Sep 08)

Gordon Brown

Derby County

Mike Huckabee

Lute Olson

Pearl Harbor

Sonia Gandhi

Ricky Hatton

Narendra Modi

Jesus Christ

Rudy Giuliani

	Triassic survivors.
		Lazarus taxa is a term referring to some taxa living around the Permo-Triassic extinction which seemingly disappear from the fossil record as if having become extinct, only to reappear millions of years later with near identical morphology.
		Systematic of preservational bias this effect is thought to be likely to be caused by a reduction in numbers within the taxa to a point that the species lived within a localised area which has yet to be discovered, such as an off-shore refugia.
		When Lazarus taxa do reappear after having been "missing" for millions of years they are nearly always of almost identical morphology to when they were last seen.
	www.palaeo.gly.bris.ac.uk /Palaeofiles/Permian/survivors.html (802 words)

	Lazarus taxon - Wikipedia, the free encyclopedia
		In paleontology, a Lazarus taxon (plural taxa) is a taxon that disappears from one or more periods of the fossil record, only to appear again later.
		Lazarus taxa are observational artifacts that appear to occur either because of (local) extinction, later resupplied, or as a sampling artifact.
		Lazarus taxa that reappear in nature after being known only as old enough fossils can be seen as an informal subcategory of the journalist's "living fossils", because a taxon cannot become globally extinct and reappear.
	en.wikipedia.org /wiki/Lazarus_taxon (614 words)

	Talk:Lazarus taxon - Wikipedia, the free encyclopedia
		The coelacanth was believed to have been extinct since the end of the Cretaceous period until a live specimen turned up off the east coast of South Africa in 1938.
		The relation between living fossils and lazarus taxa is explained at living fossils, with the coelacanth as an example.
		Maybe, but Lazarus taxa are usually those that have been declared extinct.
	en.wikipedia.org /wiki/Talk:Lazarus_taxon (386 words)

	Extinctions in the History of Life - Cambridge University Press
		Taxa missing from the fossil record but which can be inferred to have been alive at the time by their occurrence in both older and younger rocks are called Lazarus taxa (see Fara, 2001).
		Lazarus taxa are useful in assessing the quality of the fossil record – the greater the proportion of Lazarus taxa present during a given interval of geological time, the poorer is the fossil record for that time interval.
		Survival of Lazarus taxa is usually explained by postulating the existence of refuges – safe places where the adverse factors causing extinction were absent or reduced.
	www.cambridge.org /uk/catalogue/catalogue.asp?isbn=0521842247&ss=exc (3123 words)

	Triassic survivors.
		Lazarus taxa is a term referring to some taxa living around the Permo-Triassic extinction which seemingly disappear from the fossil record as if having become extinct, only to reappear millions of years later with near identical morphology.
		It has also been suggested that the taxa were from nearshore habitats and have been poorly sampled from the rare boundary sections found, or that it may simply reflect poor preservation.
		When Lazarus taxa do reappear after having been "missing" for millions of years they are nearly always of almost identical morphology to when they were last seen.
	palaeo.gly.bris.ac.uk /Palaeofiles/Permian/survivors.html (802 words)

	Lazarus taxa - EvoWiki (Site not responding. Last check: 2007-10-08)
		A Lazarus taxon, named after the man whom the Bible said was raised from the dead by Jesus Christ, is a taxon for which specimens are separated by large amounts of geological time with no intervening fossil record, making it appear as if they "rose from the dead."
		A recent popular example are the Coelacanths, whose fossil record extends from the Devonian until toward the end of Mesozoic where it abruptly ends.
		Lazarus taxa are sometimers claimed as evidence against evolution by creationists.
	wiki.cotch.net /index.php?title=Lazarus_taxa&redirect=no (229 words)

	Lazarus taxa, refugia and relict faunas: Evidence from graptolites Journal of the Geological Society - Find Articles
		Lazarus taxa, refugia and relict faunas: Evidence from graptolites
		Of these four taxa only T testis survives apparently unchanged, but all four have a pronounced Wenlock aspect to them and are clearly survivors from that time.
		The species have not been recorded from the nilssoni Biozone anywhere else in the world; and the occurrence of the cladia-less cyrtograptids in both the late Wenlock and early Ludlow of New South Wales and nowhere else, suggests a particular hydrodynamic niche, a refugium, in which the fauna lived and survived.
	www.findarticles.com /p/articles/mi_qa3721/is_200201/ai_n9034127/pg_7 (326 words)

	PALEAUTONOMY.COM: Extinction - Lazarus Taxon
		In paleontology, a Lazarus taxon is a taxon that disappears from one or more periods of the fossil record, only to appear again later.
		An endangered species is a population of organisms which is either (a) so few in number or (b) threatened by changing environmental or predation parameters that...
		The term refers to the New Testament story of Lazarus, who was raised from the dead.
	www.paleautonomy.com /extinction/taxon.html (677 words)

	Ghost lineage (Site not responding. Last check: 2007-10-08)
		Among the arguments against birds being a type of dinosaur is the argument that the most birdlike of the dinosaurs, and therefore the taxa closest to birds, appear in the fossil record after the first known bird, Archaeopteryx.
		This is not a valid argument due to preservational bias in the fossil record.
		In recognition of Jablonski's work on ghost lineages and Lazarus taxa [taxa for which specimens are separated by large amounts of time with no intervening fossil record, thus making it seem as though the later specimens "rose from the dead" like Lazarus did in Christian mythology -- ed.
	www.dinosauria.com /jdp/evol/ghost.html (447 words)

	[No title]
		Diversity, in both versions of Abelmann's curve and in Lazarus' data, increases gradually in the early Miocene and falls significantly near the early - middle Miocene boundary (ca., 15 Ma), although some of the drop in diversity at this time is due to the differences in overall diversity reported between the two authors.
		5D) the longevity distribution matches that of Lazarus, although, due to the limited total time of her study interval, long-ranging species in the second distributional mode (>10-12 m.y.) are all recorded in a single—and thus artificially high-valued—bin at 12-14 m.y.
		Basic data on the longevity of taxa are given for different time intervals in Table 5, where the longevities (drawn from the Lazarus data set) are presented not only for radiolarians as a whole, but also for each of the two major taxonomic subgroups within them—the Nassellaria and Spumellaria.
	www.nhm.ac.uk /hosted_sites/pe/2002_1/antarct/results.htm (1351 words)

	Lazarus Definition / Lazarus Research (Site not responding. Last check: 2007-10-08)
		Lazarus is a proper name referring to a character of the Bible.
		Lazarus is the beggar at the rich man's table, who receives his reward in the Hereafter, in Abraham's bosom at the everlasting banquet, while the rich man craves a drop of water from Lazarus' finger.
		Lazarus is a stirring conclusion to the public ministry of Jesus.
	www.elresearch.com /Lazarus (334 words)

	RESULTS
		The standard stratigraphic marker species (Lazarus, 1992) for this time interval were all seen and in most samples were easily identifiable.
		Some difficulties were noted with certain taxa in determining the morphologic limits to closely related species, which make the precise placement of some of the first appearance datums (FADs) and last appearance datums (LADs) difficult.
		Given these occasional taxonomic and preservational problems, an empty cell in the chart indicates that the nominate taxa was not seen, but not that it was necessarily absent.
	www-odp.tamu.edu /publications/183_SR/007/007_5.htm (903 words)

	Alroy in review, Paleobiology
		He argued that this would be most appropriate when the taxa have high turnover rates relative to the length of the sampling intervals, as with marine invertebrate genera and marine stages, or, in the current case, mammal species and 1 m.y.
		The acceptable performance of the Lazarus method is due to its simple and persuasive logic: unless there is some systematic preservational difference between taxa that range through intervals and taxa whose ranges truncate in intervals, the proportion of range-throughs that are preserved truly must be an accurate estimate of the overall preservation probability (Paul 1982).
		The other possibility is that the Lazarus taxa and ghost lineages both fail to correct fully for the extreme differences in sampling intensity between the early and late Eocene, or early and late Miocene.
	www.nceas.ucsb.edu /~alroy/Alroy.sampling.html (12572 words)

	The Permo-Triassic Extincion
		Some major taxa were, however, entirely lost, including both the tabulate and the rugose corals (though they weren't extensively diversified even at the beginning of the Permian) and the fusilinaceans.
		Also, the time scale of the event may be artificially extended because of the presence of Lazarus taxa; there are many groups that apparently were lost in the Permian that appear again in the Triassic, falsely broadening the Permian extinction peak.
		The ammonoids, for instance, which were one of the taxa most heavily hit at the end of the Permian, returned to flourishing numbers a mere 6 or 7 million years into the Triassic, comprising at least 150 species.
	www.earth.rochester.edu /ees207/Mass_Ext/higgins_mass4.html (813 words)

	Sample Chapter for Erwin, D.H.: Extinction: How Life on Earth Nearly Ended 250 Million Years Ago.
		Such seemingly miraculous rebirths were christened Lazarus taxa by David Jablonski, a paleontologist from the University of Chicago (and normally not the most religious of men).
		The number of Lazarus lineages among gastropods and other taxa tell us that many fossils simply were not preserved in the fossil record.
		Lazarus taxa do not reappear in the fossil record until the pace of diversification, or origination of new species, begins to pick up.
	www.pupress.princeton.edu /chapters/s8011.html (4201 words)

	[No title]
		Mass extinctions are global in extent - involve lots of taxa and are rapid b.
		If there is a turnover in taxa it is because the successor taxa are better adapted 2.
		Modern view is that survival of taxa may have a lot to do with chance a.
	www.siue.edu /~rbrugam/lec13.txt (1318 words)

	Rhuddanian
		Occurrences of the relicts of the Hirnantia fauna, a situation similar to those of the English Lake District (Harper and Williams, 2002) and the Oslo region (Baarli and Harper, 1986), along with Lazarus taxa indicate that environmental condition may have been slightly ameliorated at the beginning of the Silurian.
		An association of the holdovers and immigrants with a few newly established taxa shows a continuation of the survival period and a transformation of brachiopod faunas through the Ordovician–Silurian transition since the acuminatus Biozone.
		In addition to the survival taxa (e.g., Eostropheodonta), there are immigrants (e.g., Zygospiraella) and Lazarus taxa (e.g., Strophomena) that have not been known from the Yangtze Region in the Ordovician, associated with some new genera (e.g., Merciella).
	www.unt.edu.ar /fcsnat/INSUGEO/geologia_18/29.htm (1969 words)

	Extinction
		The same is true of higher level taxa, though of course it always comes down to the taxon’s last surviving representative species in the end.
		Although some Ediacaran taxa are now known to have persisted, and others may have evolved into different forms, most of them simply vanish from the fossil record near the beginning of the Cambrian.
		Marine ecosystem collapse is signalled by a sharp reduction in bioturbation, a disappearance of Permian taxa, a sharp decrease in the
	www.peripatus.gen.nz /paleontology/extinction.html (4722 words)

	[No title]
		Progenitor Taxa - appear during the extinction or survival phase and rapidly radiate in the recovery phase.
		Lazarus Taxa - taxa that reappear after they have disappeared from the fossil record during the extinction phase
		Found that the old taxa just resemble the new taxa - due to convergent evolution.
	www.geo.arizona.edu /geo3xx/geo308_fall2002/backup/Extinct2.html (380 words)

	GEOL 331 Lectures 6-7: Biostratigraphy
		Biozone (often just "zone"): body of rock characterized by one or more taxa that permit it to be distinguished from adjacent rocks.
		Mass Extinctions Abrupt simultaneous extinctions of numerous taxa, if real, are powerful biostratigaphic markers and are interesting in their own right.
		Lazarus Taxa: Taxa that temporarily "disappear" and then reappear in fossil record.
	www.geol.umd.edu /~tholtz/G331/lectures/331strat.html (1235 words)

	IngentaConnect Lazarus taxa, refugia and relict faunas: evidence from graptolite... (Site not responding. Last check: 2007-10-08)
		IngentaConnect Lazarus taxa, refugia and relict faunas: evidence from graptolite...
		Lazarus taxa are considered to be end members of a common phenomenon and their usefulness is questioned.
		Mass extinctions are survived by a small number of evolutionary lineages, which give rise to the increase in biodiversity during the recovery phase; and by a small number of species which survived in geographically small, isolated refugia, perhaps marginal to the main environment in crisis.
	www.ingentaconnect.com /content/geol/jgs/2002/00000159/00000001/art00001 (207 words)

	LAZARUS DINOSAURS (Site not responding. Last check: 2007-10-08)
		This is not the case for true Lazarus taxa, which leave a >TOTAL< 100% palaeoabsence (e.g.
		Also, the 5 Ma-long Aalenian record is not a scratch on the 65 Ma-or-more-long stunt pulled off by true Lazarus taxa.
		The whole idea of Lazarus taxa is that they suddenly show up _long_ after their lineage has apparently gone extinct.
	dml.cmnh.org /1997May/msg00817.html (169 words)

	RedOrbit - Science - Wall Structures In Selected Paleozoic Lagenide Foraminifera
		The wall in Pachyphloia ovata Lange, 1925 is inferred to be plesio-monolamellar or ortho-monolamellar, because of the pronounced difference in thickness between the primary septum of a given chamber and the outer test wall in preceding portions of the test.
		Although it is unclear whether or not the microgranular inner layer is retained in S. amazonica, the absence of such a layer among the other examined Late Pennsylvanian and Permian taxa suggests that diminution and eventual loss of the vestigial "tectum" must have occurred rather soon after the origin of the lagenide clade.
		The latter species is inferred to possess a plesio- or ortho-monolamellar wall because of the unusually thickened sides of its test (relative to the primary septal wall), and because secondary lamellar structure has been shown in other specimens in the genus.
	www.redorbit.com /news/display?id=51885 (6428 words)

Try your search on: Qwika (all wikis)