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Topic: Xenusion


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  Xenusion - Wikipedia, the free encyclopedia
Xenusion is a possible very primitive arthropod/onychophore known from two specimens found in glacial debris in Germany.
If Xenusion is an arthropod/onychophore, it is one of the oldest currently known fossils of a mobile, modern animal.
Xenusion has been reinterpreted as a Vendian frond animal by Tarlo, and a convincing drawing of that interpretation has been presented by McMenamin.
en.wikipedia.org /wiki/Xenusion   (315 words)

  
 Xenusion -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-09)
Xenusion is a possible very primitive (Invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin) arthropod/ (Click link for more info and facts about onychophore) onychophore known from two specimens found in glacial debris in Germany.
If Xenusion is an (Invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin) arthropod/ (Click link for more info and facts about onychophore) onychophore, it is one of the oldest currently known fossils of a mobile, modern animal.
Xenusion has been reinterpreted as a (Click link for more info and facts about Vendian) Vendian frond animal by Tarlo, and a convincing drawing of that interpretation has been presented by McMenamin.
www.absoluteastronomy.com /encyclopedia/x/xe/xenusion.htm   (443 words)

  
 Xenusion
The legs of the foremost (?) segments are either missing or not preserved.
A likely onychophore, Aysheaia, is known from the slightly younger Burgess Shale of British Columbia.
There is one species of Xenusion -- Xenusion Auerswaldae.
www.fastload.org /xe/Xenusion.html   (300 words)

  
 Onychophora
Onychophorans, of which there are several endemic species in New Zealand, share a number of characteristics with both annelids (segmented worms) and arthropods, although they are more closely related to the latter and are sometimes, as here, regarded as a subphylum of the Arthropoda.
Xenusion, from early Cambrian sandstones of eastern Europe.
Therefore, the absence of engrailed transcription in the ectoderm of modern Onychophora could well be a consequence of evolutionary loss of exoskeletal elements..." (Jacobs et al.
www.peripatus.gen.nz /Taxa/Arthropoda/Onychophora.html   (1840 words)

  
 ediacarian   (Site not responding. Last check: 2007-10-09)
As time has passed, the Ediacaran faunas have, if anything, become more rather than less enigmatic.
A few fossils such as Kimberella, Bomakellia, and Xenusion seem to be possible for precursors to Cambrian forms.
Close to the Cambrian boundary, worm tracks, and various hard shelled forms - especially a collection of small forms known as the 'small shelly fauna' also appear to be probable precursors of Cambrian life.
www.yourencyclopedia.net /Ediacarian.html   (462 words)

  
 Onychophora Online: velvet worms, peripatus, living fossils, by Julian Monge Najera   (Site not responding. Last check: 2007-10-09)
Until recently one of the largest onychophorans, Epiperipatus torquatus, was known to reach 15 cm and 4000 mg, but some had doubts that an onychophoran, with its soft body and many legs, could exceed that size.
Perhaps Xenusion was not at all an onychophoran?
This proves that onychophorans can indeed be the size of the ancient Xenusion, supporting the interpretation that it was indeed an onychophoran.
rbt.ots.ac.cr /onicof/news97.htm   (1592 words)

  
 Onychophora Online: velvet worms, peripatus, living fossils, by Julian Monge Najera   (Site not responding. Last check: 2007-10-09)
LargerCarboniferous diplopods, unable to hide in the litter, developedspines and sometimes gigantism (Shear and Kukalov -Peck,1990), which might explain the large size of Xenusion (Appendix6).
Apparently, the development of oncopod spinespreceded a trend toward smaller body plates (Xenusion) and the finalloss of plates and spines (Aysheaia).
With Helenodora, which is moresimilar to living onychophorans and perhaps was even semiterrestrial,spines disappeared altogether and oncopods became even shorter andsimilar to those of living onychophorans (Fig.
www.biologia.ucr.ac.cr /~rbt/onicof/onynew99/onyevolu.htm   (5954 words)

  
 pouet.net BBS :: No new logos?
xenusion: I added my logo relatively late, and it's shown all the time.
xenusion: I like the old crap logos, I don't understand what you're complaining about.
I didn't see many good new logos in the vote page.
www.pouet.net /topic.php?which=1191&page=2   (567 words)

  
 Fossil Record of the Onychophora   (Site not responding. Last check: 2007-10-09)
Others, such as the infamous Hallucigenia, were armored with long spines; until very recently it was thought that Hallucigenia was not an onychophoran-like animal at all, but instead was a bizarre creature that stood and possibly "walked" on its spines (Ramskold, 1992).
The picture on the bottom above shows a latex cast of a third such fossil, one of the earliest known: Xenusion, from early Cambrian sandstones of eastern Europe.
This form was also armed with spines, although they were shorter that those of Hallucigenia.
www.ucmp.berkeley.edu /onychoph/onychophorafr.html   (244 words)

  
 CGTalk - Grand Space Opera 2D Entry: Marco Siegel
Last edited by xeNusion : 01-11-2005 at 11:14 AM.
Reason: there is still some time so i give it another try
Last edited by xeNusion : 10-23-2004 at 05:41 PM.
forums.cgsociety.org /showthread.php?p=1831191   (415 words)

  
 Jurassic Pack Homepage / JP#12 / TP2002 - An X-Mas Tale?
Ghandy: "You know my feelings, my friend, when it comes to this party.
I got a VIP pass from xeNusion too.
But I fear Mop is here somewhere, haunting for me. Have to leave now, enjoy the party, Zito!"
www.jurassicpack.de /JP12-Xmas.htm   (1496 words)

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