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Topic: Aysheaia

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In the News (Mon 18 Mar 19)

Aysheaia is a small, 1-6cm, wormlike animal from the Middle Cambrian Burgess Shale of British Columbia.
Unlike many early Cambrian forms whose relationships are puzzling or worse, Aysheaia is remarkably similar to an obscure modern phylum the Onychophora.
The principal differences are that the Onychophora are terrestrial and have jaws whereas Aysheaia was marine and jawless.
www.ebroadcast.com.au /lookup/encyclopedia/ay/Aysheaia.html   (201 words)

 Encyclopedia: Aysheaia   (Site not responding. Last check: 2007-10-22)
Aysheaia pedunculata is a soft-bodied, caterpillar-shaped organism average body length of 1-6 cm.
Aysheaia is a soft-bodied, caterpillar-shaped organism average body length of 1-6cm.
Aysheaia is thought to have been a parasite living on sponges since it is commonly found in association with their remains (spicules).
www.nationmaster.com /encyclopedia/Aysheaia   (507 words)

 Aysheaia   (Site not responding. Last check: 2007-10-22)
Aysheaia es un suave-bodied, oruga-formado la longitud de cuerpo media del organismo de el 1-6cm.
Aysheaia tiene cuerpo diez que los segmentos, cada uno de los cuales tiene un par de claveteado, annulated las patas.
Aysheaia utilizó probablemente sus garras para aferrarse en la esponja.
www.yotor.net /wiki/es/ay/Aysheaia.htm   (157 words)

 [No title]   (Site not responding. Last check: 2007-10-22)
Aysheaia is a soft-bodied, caterpillar- shaped organism with an average body length of 10- 60 mm.
Based on its association with sponge remains, it is believed that Aysheaia was a sponge grazer and may have protected itself from predators by seeking refuge within sponge colonies.
Burgessia averaged 10 mm in diameter and contained a branching system in its carapace that was composed of a series of canals.
park.org /Canada/Museum/burgessshale/1-3arth.html   (205 words)

 Onychophora Online: velvet worms, peripatus, living fossils, by Julian Monge Najera   (Site not responding. Last check: 2007-10-22)
The morphologicalsimilarities between Onychophora and Aysheaia have frequently causedthe Onychophora to be labelled as a "living fossil", a term opposedby several authors (e.g.
If Aysheaia fed on sponges (Whittington, 1978), it is strangethat no sponge spiculae were preserved in the digestive tract.
One hypothesis is that they changed fromexposed life on the marine substratum to new microhabitats withreduced space, such as tunnels, crevices or even sponge canals(although reconstructions show Aysheaia crawling on the outside ofsponges (Whittington, 1978), a lack of armour would better suit lifeinside the canal system of the sponge).
rbt.ots.ac.cr /onicof/onynew99/onyevolu.htm   (5954 words)

 jolt.co.uk public forums - Aysheaia - World Fact Book entry   (Site not responding. Last check: 2007-10-22)
The Confederated States of Aysheaia, a country on the eastern edge of the 10,000 island region.
The largest and main islands are, from north to south, Aysheaia, Ottoia, Pikaia (the largest island), Choia, Wapt, Olenoi, Ki ku, Tok, and Kuk.
The indigenous population of the Confederated States of Aysheaia, which is predominantly Aysheaian, consists of various ethnolinguistic groups.
forums.jolt.co.uk /showthread.php?t=434340   (2340 words)

 Aysheaia - Encyclopedia, History, Geography and Biography
Only 19 specimens of Aysheaia are known and it is also believed that some modern day insects, centipedes, and millipedes may have arisen from Aysheaia.
This page was last modified 00:58, 4 May 2005.
This encyclopedia, history, geography and biography article about Aysheaia contains research on
www.arikah.net /encyclopedia/Aysheaia   (148 words)

 UCMP Mystery Fossil Number 44   (Site not responding. Last check: 2007-10-22)
Aysheaia, a fossil from the Middle Cambrian Burgess Shale of British Columbia, looks much like modern onychophorans and is believed to be an early marine ancestor of this group of animals.
Most people are unfamiliar with onychophorans as they are native to forest regions of South America, Africa, the Caribbean, and Oceania—and on top of that, they’re shy.
But these odd creatures, often called “velvet worms,” are interesting because they may be related to arthropods and can give us an idea of what the ancestors of the arthropods may have been like.
www.ucmp.berkeley.edu /historyoflife/mysteries/mystery44/mystery44.html   (92 words)

 life-5-b-Xystridura   (Site not responding. Last check: 2007-10-22)
The limbs are more or less conical; they too have 12 annulate segments, which may have spines pointing either forward or backwards.
Note -- Aysheaia has been attributed to the class onychophora, to which the modern Peripatus, a New Zealand living fossil, also belongs.
The animal lived among colonies of sponges and it is possible that it fed on their soft parts.
www.yuzonakano-secretmemory.com /life5.dd.html   (173 words)

 Two Phyla of Likely Arthropod Relatives: Tardigrada and Onychophora   (Site not responding. Last check: 2007-10-22)
A fossilized lobopod Aysheaia, from material preserved in the Burgess Shale of British Columbia, formed about 525 million years ago in the mid-Cambrian period (lobopod refers to the animal as well as the limb).
A close association between lobopods and arthropods is supported by both anatomical and molecular studies, and the 3 groups are sometimes referred to collectively as the Panarthropoda.
Onychophorans possess the following arthropod-like characteristics 1) the jaw musculature is striated; the cuticle contains chitin; 3) the main body cavity is a hemocoel, 4) gas exchange is achieved by spiracles opening into a tracheal system; 5) mouth appendages are mandible-like…..
bama.ua.edu /~clydeard/bsc376/lecture33.htm   (668 words)

 What is Peripatus?
It is Aysheaia from the Burgess Shale (dated at 530 million years old).
The difference is that Aysheaia was apparently marine, whereas Peripatus and all living onychophorans are terrestrial.
169), and Gould himself says of Peripatus and Aysheaia, 'the similarities are impressive and anatomically deep, the differences superficial...' (p.
www.answersingenesis.org /creation/v16/i4/peripatus.asp   (778 words)

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.
A number of fossils from the Cambrian have been described which look more or less like onychophorans.
Some, such as the Middle Cambrian form Aysheaia are rather similar to living forms.
www.peripatus.gen.nz /Taxa/Arthropoda/Onychophora.html   (1840 words)

 American Scientific Affiliation
The word lobopod is used in two ways: to reference a particular kind of animal leg and to refer to a group of animals possessing such legs.
Aysheaia has spikes on its legs that are used to grasp prey.
Aysheaia is a member of the phylum, Lobopoda.
www.asa3.org /ASA/PSCF/2001/PSCF3-01Morton.html   (5942 words)

 Tardigrade - Wikipedia, the free encyclopedia
The species Beorn leggi has been recorded from Canadian Cretaceous amber.
Aysheaia from the middle Cambrian Burgess shale might be related to tardigrades.
Tardigrades occur over the whole world, from the high Himalaya (above 6000 m) to the deep sea (below 4000 m) and from the polar regions to the equator.
en.wikipedia.org /wiki/Tardigrade   (718 words)

 Aysheaia   (Site not responding. Last check: 2007-10-22)
The worm Aysheaia, shown in both pictures grazing on sponges, is an ancestor of onychophorans, or velvet worms.
When the Burgess Shale animals were reassessed, Stephen Jay Gould made Aysheaia famous in his book "Wonderful Life".
He called Aysheaia and a number of other Burgess Shale creatures "weird wonders" without any known affinities with living animals.
www.carleton.ca /Museum/camex/1layshe.html   (92 words)

 Evolution of Marine Invertebrates   (Site not responding. Last check: 2007-10-22)
Arthropods (relatives of insects and lobsters) are one of the most abundant fossil types found here.
A fossil that looks to me like a modern day ghost shrimp, Aysheaia pedunculata, is alleged to have eaten sponges and may have hid among them for protection (some gratitude!).
Paleontologists believe that centipedes and millipedes may have evolved from this Aysheaia.
www.oceansonline.com /inverts.htm   (1755 words)

 Peripatus and Allies (Phylum Onychophora)
They are often colourful animals, there is at least one white cavenicolous (cave dwelling) species, otherwise they come in various shades of grey, brown, orange, red, green and even blue.
Many of the earlier forms were marine, such as the members of the genus Aysheaia whose fossils are found in rocks which are 540 million years old.
This means there have been Onycophorans living on this planet ever since what is called the Cambrium period of prehistory.
www.earthlife.net /inverts/onychophora.html   (1273 words)

 Fossil Project 2002
They probably cling on to sponges with their appendages.
People believe aysheaia evolve into millipedes and centipedes.
The famous arthropod found in the burgess shale is trilobites.
www.starsandseas.com /SAS_student_work/Evolrprts/fossilproj/fossilproj2002.htm   (8242 words)

 Living fossil - Biocrawler   (Site not responding. Last check: 2007-10-22)
This means that the coelacanth lineage has evolved from freshwater to saltwater.
The resemblance between Peripatus and Aysheaia (an early Cambrian animal from the Burgess shales) is striking (as of now, both are classified in the Tardipolypoda (Tardigrada and Onychophora)), were it not that Aysheaia was a marine animal, while Peripatus lives in tropical leaf mould.
However, it makes not clear whether the taxon is truly old, or it simply has many ancestral characteristics (plesiomorphies).
www.biocrawler.com /biowiki/Living_fossil   (864 words)

 Palaeos Invertebrates: Arthropoda: Lobopoda: Onychophora
Others were armored with various plates and spines which, disarticulated, contribute substantially to the "small shelly fauna." All of these Cambrian forms differed from living onychophorans in being marine.
The third segment holds the first pair of parapodia-like legs.
The Order Protonychophora includes the problematical fossil Aysheaia, first described from the Burgess Shale by Walcott.
www.palaeos.com /Invertebrates/Arthropods/Lobopoda/Onychophora.html   (1125 words)

 phylum level evolution
Since just prior to the Vendian the only evidence for macroscopic life was that of the worms, if the various phyla were to evolve, it must have been from the worms.
The first in the line leading from worms to arthropods is an animal similar to the lobopod, Aysheaia.
But Anomalocaris also has one characteristic feature of an arthropod, two arthropod ‘legs’ are attached to the front, by the mouth and act as grabbers for catching prey.
home.entouch.net /dmd/cambevol.htm   (5386 words)

 Velvet worms   (Site not responding. Last check: 2007-10-22)
These modern relatives of Aysheaia are velvet worms.
They live in leaf litter in tropical forests.
Among their many interesting features is the fact that they are placental animals and give birth to live young.
www.carleton.ca /Museum/camex/1mvelvet.html   (35 words)

 Viking Cat Club Show Results, St Ivol Leisure Centre, St Ives 12-9-04
Equistice Ceaser (ABY n) x GB*Riverfern Moon Dance (ABY o)
Possum Indiana Jones (ABY n) x S*Aucuparia's Aigina Aysheaia (ABY o)
GB*Riverfern Frodo (ABY o) x S*Aucuparia's Aigina Aysheaia (ABY o)
www.felisbritannica.co.uk /results/Results_VCC_12-09_04.htm   (2878 words)

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