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Topic: Peripatus


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In the News (Mon 17 Dec 18)

  
  PERIPATUS - LoveToKnow Article on PERIPATUS   (Site not responding. Last check: 2007-10-22)
It thus appears that in Peripatus the coelom does not develop a perivisceral portion, but gives rise only to the renal and reproductive organs.
The genus Peripatus was established in 1826 by L. Guilding, who first obtained specimens of it from St Vincent in the Antilles.
Finally, the tracheae, though not characteristic of all the classes of the Arthropoda, are found nowhere outside that group, and constitute a very important additional reason for uniting Peripatus with it.
www.1911encyclopedia.org /P/PE/PERIPATUS.htm   (6402 words)

  
 PERIPATUS - Online Information article about PERIPATUS   (Site not responding. Last check: 2007-10-22)
Peripatus is an Arthropod, as shown by (I) the presence of appendages modified as jaws; (2) the presence of paired lateral ostia perforating the wall of heart and putting its cavity in communication with the pericardium; (3) the presence of a vascular body cavity and pericardium (haemocoelic body cavity); (4) See also:
Peripatus, though indubitably an Arthropod, differs in such important respects from all the old-established Arthropod classes, that a special class, equivalent in rank to the others, and called Prototracheata or Onychophora, has had, as we have seen, to be created for its sole occupancy.
PERIPATUS (Guilding).—Soft-bodied vermiform animals, A, Early stage; no trace of the vascular space; endoderm and ectoderm m with one pair of ringed antennae, one pair of jaws, one contact.
encyclopedia.jrank.org /PAS_PER/PERIPATUS.html   (6042 words)

  
 ARTHROPODA - Encyclopedia Britannica - ARTHROPODA - JCSM's Study Center   (Site not responding. Last check: 2007-10-22)
In Peripatus the prostomium of the Chaetopod-like ancestor is atrophied, but it is possible that two processes on the front of the head (FP) represent in the embryo the dwindled prostomial tentacles.
We are also, by the isolation of Peripatus and the impossibility of tracing to it all other tracheate Arthropoda, or of regarding it as a degenerate offset from some one of the tracheate classes, forced to the conclusion that the tracheae of the Onychophora have been independently acquired.
In Peripatus the stigmatic pits at which the tracheae communicate with the atmosphere are scattered and not definite in their position.
www.jcsm.org /StudyCenter/Encyclopedia_Britannica/ARN_AUD/ARTHROPODA.html   (9062 words)

  
 B16: The History of Life: Source Book
Peripatus is an elongated invertebrate with many pairs of stout, fleshy legs--hence the chosen name for this obligate walker.
Peripatus is the most prominent member of a small group known as Onychophora.
In this argument, Peripatus is a superworm for its legs and a diddly fly for building these legs without true segments.
www.sjgarchive.org /library/text/b16/p0319.htm   (789 words)

  
 IOV Press Release: 400 Million Years and Still Crawling, Insectarium of Victoria, Victorian Institute of Invertebrate ...   (Site not responding. Last check: 2007-10-22)
Described as a Living Fossil by biologists at the turn of the century, the Peripatus remains one of the most perplexing curiosities in the animal world and was and still remains the subject of much debate and controversy between biologists who study these curious animals.
The peripatus is thought to be the missing link between the first worm-like animals which crawled upon the face of the earth over 400 Million years ago and the first arthropods which included insects, spiders, centipedes and crustaceans, all of which possess an articulated external skeleton.
Although wormlike and possessing a segmented body, the peripatus has legs which move in a similar fashion to the eyes of a snail and are able to be extended by internal pressure variations of its blood.
www.insectarium.org /pr6.html   (311 words)

  
 OnyBiblioG-L
Paraperipatus Lorentzi Horst, a new Peripatus from Dutch New Guinea.
Peripatus acacioi Marcus et Marcus (Onychophore) I. Structure et ultrastructure des hémocytes.
Peripatus acacioi Marcus et Marcus (Onychophora: Peripatidae): étude infrastructurale.
www.calacademy.org /research/izg/OnyBiblioG-L.htm   (1680 words)

  
 New Zealand Insects
The Peripatus, of which there are several endemic species in New Zealand, is considered to be the "missing link" between segmented worms and arthropods.
The Peripatoidesnovaezealandiae has 16 pairs of legs with hooks at the end, two robust feelers, and is velvety in appearance and comes in colours of blue, green, grey and brown; and may reach 80 mm in length.
Peripatus live in damp areas, such as rotting wood, behind the bark of trees, and in leaf litter.
members.fortunecity.com /nzbirding/insects.htm   (1569 words)

  
 Biology Bytes March 1998: Peripatus - Dept of Biological Sciences, MU.   (Site not responding. Last check: 2007-10-22)
Present day peripatus are found on land masses derived from the fragmentation of the supercontinent Gondwana: Australasia, Africa, Central and South America and South East Asia.
Recently, we have been asking the question, "What is it about the biology of peripatus that has led to the evolution of such a profusion of species in Australia?".
Studies of this kind on peripatus and other slow- moving invertebrates, are of great significance in evolutionary studies and conservation genetics.
www.bio.mq.edu.au /dept/biobytes/backbyts/mar98.html   (727 words)

  
 Nat' Academies Press, The Silent Landscape: The Scientific Voyage of HMS Challenger (2003)
Peripatus is one of those creatures that really do make you believe in evolution, because it is an animal with the body of an earthworm but the appendages of an insect.
The formal name for the group to which the species of Peripatus belong is the Onycophora, derived from the Greek word for claws (onychos) and bearer (phoros).
This soft cuticle allows it to burrow into dark moist crevices and protect itself from the water-loss to which it is especially vulnerable, and its hydrostatic skeleton, which is common to all annelids, supports and maintains its shape.
www.nap.edu /openbook/0309089042/html/187.html   (524 words)

  
 Onychophora Bibliography   (Site not responding. Last check: 2007-10-22)
Dendy, A. (1891) The reproduction of Peripatus leuckartii, Sänger.
Dendy, A. (1893) The hatching of a Peripatus egg.
Dendy, A. (1894) The hatching of a Peripatus egg.
www.sciref.org /onychophora/biblio.htm   (10885 words)

  
 Peripatus   (Site not responding. Last check: 2007-10-22)
These taxa share segmentation, a hemocoel, saccate nephridia, ecdysis of a secreted chitinous but non-collagenous exoskeleton, loss of locomotory cilia, a tubular, dorsal, ostiate heart in a pericardial sinus, a coelom reduced to end sacs and gonocoel, and paired segmental legs.
Onychophorans are also known as velvet worms or walking worms and sometimes the original generic name Peripatus is used as a common name, in which case it is not capitalized or italicized (Fig 15-1A).
Preserved onychophorans are available from Ward’s Natural Science Co. as “peripatus”, with the name being used in its broadest sense as a common name for all onychophorans.
www.lander.edu /rsfox/310peripatusLab.html   (5113 words)

  
 What is Peripatus?
The difference is that Aysheaia was apparently marine, whereas Peripatus and all living onychophorans are terrestrial.
The more reasonable alternative is that Peripatus has lived only a short time on earth and that the long-age interpretations are incorrect.
What we know about Peripatus and other onychophorans is that this is a group with generalized feeding habits, which lives in warm, moist protected environments.
www.answersingenesis.org /creation/v16/i4/peripatus.asp?vPrint=1   (778 words)

  
 Palaeos Invertebrates: Arthropoda: Lobopoda: 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.
Habit: The Peripatus preys on small arthropods by squirting and entrapping them in a glue fired from openings beside the mouth.
Peripatus live in damp areas such as under moss, in rotting logs, behind the bark of trees, and in leaf litter.
www.palaeos.com /Invertebrates/Arthropods/Lobopoda/Onychophora.html   (1125 words)

  
 OnyBiblioM-S
Peripatus, and especially on those of Cayenne and the West Indies.
Peripatus novae-zealandiae, with notes on the structure of the species.
Peripatus novae-zealandae, with notes on the structure of the species.
www.calacademy.org /research/izg/OnyBiblioM-S.htm   (2706 words)

  
 OnyBiblioT-Z
Peripatus the velvet worm 'ulat chelawah' in Malaya.
Peripatus (Macroperipatus) acacioi Marcus and Marcus (Onychophora, Peripatidae).
Peripatus capensis zich in chemisch opzicht bij de Anneliden of bij de Arthropoden aan?
www.calacademy.org /RESEARCH/izg/OnyBiblioT-Z.htm   (844 words)

  
 Invertebrates in the Wet Tropics - Peripatus or Onychophorans - The Velvet Worm
The peripatus is quite ancient and fossils have been found dating back to the days when the earliest animals colonised the land (the Cambrian period, 500 million years ago).
The peripatus has a most unusual life cycle and is actually a voracious, nocturnal predator.
The peripatus bites a single hole into the victim through which the soft insides are sucked out.
www.wettropics.gov.au /pa/pa_velvet_worm.html   (622 words)

  
 Onychophora Online: velvet worms, peripatus, living fossils, by Julian Monge Najera   (Site not responding. Last check: 2007-10-22)
The Costa Rican species was found (1) in sandy, not clay rich soil, (2) closer to the surface and (3) in burrows whose temperature es more similar to the external air temperature.
We are studing Euperipatoides rowelli (Reid 1996) as a model of population processes at increasing spatial scale from local patterns of mating through to regional phylogeography.
Onychophorans (peripatus or velvet worms) show extraordinarily high local endemism, and cryptic species are common.
rbt.ots.ac.cr /onicof/abstract.htm   (2254 words)

  
 Neuromuscular transmission in Peripatus -- Hoyle and del Castillo 83 (1): 13 -- Journal of Experimental Biology
Neuromuscular transmission in Peripatus -- Hoyle and del Castillo 83 (1): 13 -- Journal of Experimental Biology
Peripatus to electrical excitation of their motor-nerves were examined.
with the phylogenetic status commonly proposed for Peripatus.
jeb.biologists.org /cgi/content/abstract/83/1/13   (238 words)

  
 [No title]   (Site not responding. Last check: 2007-10-22)
Jonathon R. Oglesbee wrote: The onychophora, peripatus, is a unique creature, found in New Zealand.
It is probably a creature from the dawn of time, as it seems to have a fossil representative of the most early invertebrates: Aysheaia, as may be found in some deposits of Burgess Shale.
Aside from a lovely name, Peripatus doesn't look much like an earth creature.
www.ascii-art.de /ascii/pqr/peripatus.txt   (203 words)

  
 Invertebrate Molecular Phylogeography
Invertebrates with low vagility (dispersal) characteristics and restricted habitat tolerance are of most use to us as they are most likely to carry molecular signals that are informative of phylogenetic events in space and time.
Thus we are presently studying the congruence of geographic and phylogenetic relationships of invertebrates including peripatus (velvet worms), weta (endemic crickets), cockroaches, flatworms, leaf-slugs, springless spring-tails and alpine grasshoppers.
Peripatus (Onychophora) which are often described as 'living-fossils' have a strictly southern hemisphere distribution and are of particular interest in studies of Gondwanan break-up in which we and our collaborators are engaged.
www.otago.ac.nz /Zoology/research/genetics/invert.html   (284 words)

  
 WCAS - Science and Christian Faith
Present among the humus layers on the forest floors of New Zealand's indigenous forests, is a tiny "worm‑like" creature belonging to the genus Peripatus.
It is called a "living fossil," for the phylum (or larger classification unit) to which it belongs, has remained virtually unchanged since the Cambrian period, some 600 million years ago (based on the evolutionary time scale).
Peripatus like creatures from the Cambrian appear fully functional and fully differentiated in terms of their complex anatomical features, and no intermediate forms leading up to them have been found in earlier rock strata.
www.christian-apologetics.org /html/Science_and_Faith.htm   (4356 words)

  
 Page Title   (Site not responding. Last check: 2007-10-22)
Peripatus is found on the large islands to our west.
Must we presume a grander stage on which Peripatus is the lone remaining actor?
To any who are thrilled by observing the small and unusual inhabitants sharing the island with us, a morning spent looking for Peripatus in the shade and quiet of Creque Dam could be most rewarding."
www.virginislandspace.org /page19.html   (144 words)

  
 Onychophora Online: velvet worms, peripatus, living fossils, by Julian Monge Najera   (Site not responding. Last check: 2007-10-22)
These characteristicscannot be reliably recorded from the embryos, however, as shown inthis study with E. biolleyi.
Someobservations on the placenta and embryonic cuticle during developmentin Peripatus acacioi Marcus and Marcus (Onychophora), p 449-459.
A general view, B detail of embryo andsurrounding tissue, C the anemone-shaped oncopodial tip marked byframe in B. Scale bars: A and B 0.5 mm, C 50 um.
www.biologia.ucr.ac.cr /~rbt/onicof/onynew99/biolembr.htm   (1572 words)

  
 Onychophora Online: velvet worms, peripatus, living fossils, by Julian Monge Najera   (Site not responding. Last check: 2007-10-22)
The Indian Peripatus, Typhloperipatus weldoni, has seldom been seen or collected and is also as misterious as the tropical African onychophorans.
Sunnucks and several Australian colleagues (Journal of Zoology 250: 447-460) have reviewed the reproductive biology of the ovoviviparous peripatus Euperipatoides rowelli which was found to comply with the general trends published six years ago for the phylum in general (Monge-Nájera, J. Reproductive trends, habitat type and body characteristics in velvet worms (Onychophora).
The CIM also publishes a bulletin with yearly bibliographies, an interesting "In memoriam" section, news about workshops and congresses, a directory of members, etc. The bulletin is "a must" for anybody interested in myriapods in general.
rbt.ots.ac.cr /onicof/news2000.htm   (2222 words)

  
 Australia's Biodiversity - What's in your backyard?
Movement seems to occur in waves running from the front to the rear of the millipede.
Peripatus, or velvet worms, are an ancient group of animals.
They are all predators and they catch their prey by squirting it with a sticky slime, making it easy to catch.
www.austmus.gov.au /biodiversity/backyard/backyard.htm   (581 words)

  
 Fossil Evidence
Fossils found elsewhere indicate that the marine ancestors of New Zealand's ancient land dwelling caterpillar-like Peripatus were alive at that time.
It is likely that plants and animals travelled freely across the land and the subsequent isolation of New Zealand suggests that the archaic frogs, large land snails, tuatara and peripatus are all living fossils that stem back from those times.
The little land that was left during the Oligocene was home to a decreasing number of species.
sci.waikato.ac.nz /evolution/FossilEvidence.shtml   (2076 words)

  
 Trewick--Molecular diversity of Dunedin peripatus
The application of allozyme electrophoresis to New Zealand peripatus that were thought to belong to a single widespread species (Peripatoides novaezealandiae) has revealed several undetected species, including a taxon specific to Dunedin (southern South Island, New Zealand).
However, almost nothing is known about the geographic range and variability of this species, nor indeed whether it comprises one or more cryptic taxa.
A rearrangement of the mitochondrial genome, relating to the position of the tLEU rna gene, was detected in these and other New Zealand peripatus and may be present in all Onychophora.
www.rsnz.org /publish/nzjz/1999/31.php   (261 words)

  
 ABC Online Forum   (Site not responding. Last check: 2007-10-22)
Nobody really addressed that, nor the fact that for every new functional structure there must be connection to the brain and the appropriate control wiring in the brain.
Your attitude to communicating on this topic is abysmal and would lead to false knowledge regardless of the topic being argued, evolution or not.
You are clearly thinking in fl and white terms, which shows you still lack the capacity of critical thinking-something many religious fundamentalists have as a problem.
www2b.abc.net.au /science/k2/stn/archives/archive68/newposts/740/topic740700.shtm   (2318 words)

  
 PSIgate - Physical Sciences Information Gateway: Search/Browse Results   (Site not responding. Last check: 2007-10-22)
Peripatus Home Page Paleontology Page >> Major Events in the History of Life Updated: 1 Jan 2005 Major Events in the History of Life Abstract This page provides a high level review of some of the main threads of the evolution of plants and ani...
Peripatus Home Page Paleontology Page >> Extinction Updated: 6 Feb 2004 Extinction Abstract A number of extinction concepts are discussed and loosely defined, followed by a survey of some important extinction and "extinction-like" events, prim...
Peripatus Home Page Paleontology Page >> Cambrian Period Updated: 26 Aug 2004 The Cambrian Period Abstract This page describes the Cambrian Period, including stratigraphy, the fossil record, and the phenomenon known as the “Cambrian explosion....
www.psigate.ac.uk /roads/cgi-bin/search_webcatalogue2.pl?limit=50&term1=Cambrian   (902 words)

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