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Topic: Uniramia


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In the News (Thu 21 Aug 14)

  
  Uniramia - Wikipedia, the free encyclopedia
The Uniramia are a major group of Arthropoda, consisting of arthropods with a single pair of preoral antennae and a single pair of legs per segment, namely the Hexapoda (insects and allies) and Myriapoda (centipedes, millipedes, and related forms).
In Manton's original proposal, the Uniramia also included the Onychophora (velvet worms), but the discovery of fossil lobopods that are intermediate between onychophorans and arthropods is strong evidence for the two groups being separate.
The Crustacea were generally considered the closest relatives of the Uniramia, and sometimes these were united as Mandibulata.
en.wikipedia.org /wiki/Uniramia   (157 words)

  
 Uniramia: Definition and Links by Encyclopedian.com - All about Uniramia
The Uniramia are a group of arthropods, comprising the Hexapoda (insects and allies) and Myriapoda[?] (centipedes, millipedes, and related forms).
The Crustacea are generally considered the closest relatives of the Uniramia, and sometimes they are united as the Mandibulata.
However, new studies suggest that the Myriapoda are not be closer related to the Hexapoda than the Crustacea, in which case the Uniramia would be abandoned.
www.encyclopedian.com /un/Uniramia.html   (129 words)

  
 Uniramia
Manton as part of a paradigm of Arthropod polyphyly, the Uniramia ("single branch") are identified by their single pair of preoral antennae, possibly homologous with the antennae of trilobites.
Recently however the status of the Uniramia as a valid taxon has been increasingly questioned and evidence presented suggesting the Crustacea are the stock from which the Hexapoda arose (i.e.
A limited version of the Uniramia, the Atelocerata, includes only euarthropodic Uniramia, but this would also be invalidated if the Pancrustacea theory turns out to be correct.
www.palaeos.com /Invertebrates/Arthropods/Uniramia.htm   (389 words)

  
 Uniramia - Wikipedia
The legs on the rest of the body are typically uniramous, that is, have a single walking branch with no gill branch as in other arthropods, which gives the group its name.
However, some embryological work has suggested that the wings in insects may in fact be homologous to the gill branch in other arthropods, which would require their ancestors to still be aquatic.
Within the Arthropoda, the Uniramia are generally considered the sister group to the Crustacea, but this is not quite so certain, and in proposals where the arthropods are polyphyletic they are often taken to be closer related to the non-arthropod Onychophora.
nostalgia.wikipedia.org /wiki/Uniramia   (352 words)

  
 Uniramia   (Site not responding. Last check: 2007-10-22)
The Uniramia is a mainly abandoned taxon of arthropods,comprising the Hexapoda (insects and allies) and Myriapoda (centipedes, millipedes, and related forms).
The Crustacea were generally considered theclosest relatives of the Uniramia, and sometimes were united as the Mandibulata.
However, new studies suggest that the Myriapodaare not more closely related to the Hexapoda than the Crustacea, causing the Uniramia taxon to be abandoned.
www.therfcc.org /uniramia-169867.html   (111 words)

  
 M28.htm   (Site not responding. Last check: 2007-10-22)
The Uniramia are primarily terrestrial, although many species have secondarily invaded freshwaters, - and a few have reinvaded the marine environment.
However, the group is thought to have originally evolved in the marine environment as benthic organisms.
The uniramia is an extremely diverse and ecologically important group, but because it is not abundant in marine environments will not be treated further in this overview.
www.meer.org /M28.htm   (712 words)

  
 BioG 105/106 | Autotutorial Introductory Biology
The phylum Uniramia are characterized by one pair of antennae and two pairs of mouthparts (single pairs of mandibles and maxillae).
The Uniramia includes the insects and several smaller groups of related organisms.
Note that most current classification schemes do not include the myriapods (centipedes and millipedes) in the Uniramia, instead placing them in their own subphylum, the Myriapoda (meaning "many-legged").
instruct1.cit.cornell.edu /courses/biog105/labs/inverts/arthropoda.html   (623 words)

  
 4Reference || Uniramia   (Site not responding. Last check: 2007-10-22)
The Uniramia are a group of arthropods, comprising the Hexapod (insects and allies) and Myriapoda (centipedes, millipedes, and related forms).
The crustacean are generally considered the closest relatives of the Uniramia, and sometimes they are united as the Mandibulata.
In proposals treating the arthropods as a polyphyletic group, the Velvet_worm were included here, but this has little support.
www.4reference.net /encyclopedias/wikipedia/Uniramia.html   (141 words)

  
 Lab 4 – Ecdysozoa - Arthropoda
Uniramia is the largest group of Arthropods and it contains the insects, millipedes, centipedes, and allied groups.
Classification and Morphology – The Uniramia are divided into two major groups the Myriapoda (centipedes, millipedes, symplylans, and pauropods) and the Hexapoda (insects).
The Uniramia are arthropods that have appendages with only one branch.
userwww.sfsu.edu /~efc/classes/biol170/lab/Laboratory4.htm   (1259 words)

  
 BIS: Arthropods of Economic Importance - Eurasian Tortricidae > Species: Subphylum Uniramia
The Hexapoda, by far the largest taxon of the Uniramia, contain the Collembola, Protura, Diplura and Insecta.
The name Uniramia refers to the fact that the appendages are basically unbranched and there is no evidence that they were derived from a branched condition.
This subphylum consists of arthropods with one pair of antennae and with mandibles.
ip30.eti.uva.nl /bis/tortricidae.php?selected=beschrijving&menuentry=soorten&id=3   (315 words)

  
 Lab 20: Subphylum Uniramia – The Terrestrial Mandibulates
Lab 20: Subphylum Uniramia – The Terrestrial Mandibulates
Members of the subphylum Uniramia are arthropods and share the general characteristics of all arthropods (that were mentioned last lab)
The Uniramia are divided into the myriapods (centipedes and millipedes) and the insects
www.humboldt.edu /~zool110/LabLectures/Lab20.htm   (711 words)

  
 Palaeos Invertebrates: Arthropods - Animals With Jointed Exoskeletons   (Site not responding. Last check: 2007-10-22)
Because of all these differences there was for some time a controversy over whether the arthropods constitute a valid monophyletic group, or whether they evolved from separate, even unrelated.
One of the more recent theories of arthropod relationships has even involved splitting up the Uniramia by aligning the Hexapoda with the Crustacea rather than the Myriapods (the Pancrustacea hypothesis) [2].
The above presents a paleontological perspective, and retains the Uniramia.
www.palaeos.com /Invertebrates/Arthropods/Arthropoda.htm   (960 words)

  
 Zolab4 S99
One of the most striking advances made by the arthropods over the annelids is the development of segmented, moveable appendages which are developed from the body wall.
It will be recalled from the previous section that the definitive mouthpart in tracheate arthropods (Uniramia) are the mandible, supported by two smaller appendages, the 1st and 2nd maxillae.
Crustaceans and uniramians collectively are often called mandibulate arthropods, and in both groups the mandibles are derived from appendages of the 2nd somite of the head.
www.runet.edu /~sdennis/zoology/zolab7_F01.htm   (5852 words)

  
 Introduction to the Uniramia   (Site not responding. Last check: 2007-10-22)
The largest major group of arthropods is a clade that includes insects, millipedes, centipedes, and their relatives.
This group, the Uniramia, was formerly defined to include the Onychophora, which are now considered a separate clade.
Click on the buttons below to learn more about the Uniramia.
www.ucmp.berkeley.edu /arthropoda/uniramia/uniramia.html   (203 words)

  
 Uniramia   (Site not responding. Last check: 2007-10-22)
The uniramia have appendages with a proximal basal element plus only one (uniramous) distal element.
Centipedes overwinter as adults and lay their eggs in the summer.
University of California Museum of Paleontology general introduction to the uniramia with many legs.
www.mercy.edu /faculty/knizeski/uniramia.html   (371 words)

  
 Talk:Arthropod - Wikpedia   (Site not responding. Last check: 2007-10-22)
Setting up the table has already caused one fair comment to be raised about what happens to the taxon Uniramia.
Tree of life, which is cladistics based and does not use ranks does show hexapoda and myriapoda to have a common source within the arthropoda, but distinct from the rest; it does not use the term Uniramia.
A while ago the Uniramia were considered monophyletic and it was unclear whether or not the Myriapoda were.
www.bostoncoop.net /~tpryor/wiki/index.php?title=Talk:Arthropod   (2400 words)

  
 BIO3324 Lecture: Protozoa   (Site not responding. Last check: 2007-10-22)
The arthropods that dominates this habitat are the Crustacean, leaving the Uniramia only the freshwater and terrestrial environments to live in.
Insects were the first organisms to fly, the first to feed on plants, and they developed a unique excretory and respiratory system to meet the demands of the living on land.
Although insects dominate the subphylum Uniramia we shouldn't forget that centipedes like this, and millipedes are also part of the
salinella.bio.uottawa.ca /BIO2125/lectures/BIO2125_lcts_Arthro_Unira.htm   (981 words)

  
 phylum Arthropoda   (Site not responding. Last check: 2007-10-22)
Subphyla Crustacea and Uniramia sometimes have been referred to as belonging in a single taxon, the Mandibulata, and members of the subphyla sometimes are referred to collectively as mandibulates.
In former years, it was common to include the centipedes and the millipedes in a single class called Myriapoda.
mandibulate -- Subphyla Crustacea and Uniramia sometimes have been referred to as belonging in a single taxon, the Mandibulata, and members of the subphyla sometimes are referred to collectively as mandibulates.
inside.msj.edu /academics/faculty/davisr/potpouri/arthropo.htm   (1079 words)

  
 PROTEROSTOMES   (Site not responding. Last check: 2007-10-22)
Because Margulis and Schwartz (1998), Brusca and Brusca (2003) and Nielsen (2001) include different taxa within their taxon, Mandibulata, I use the name Uniramia to include the insects, centipedes, and millipedes.
The following description of the phylum Uniramia came from Margulis and Schwartz (1998), Buchsbaum (1938), Barnes (1980), Barnes (1984), Brusca and Brusca (2003), Hickman (1973), Storer and Usinger (1965), and Tudge (2000).
Symmetry: Bilateral; presegmental acron and postsegmental telson with 19 to>200 intervening segments, each with a pair of limbs (although the limbs may be highly modified or lost).
comenius.susqu.edu /bi/202/Animals/EU-PROTOSTOMES/uniramia/Uniramia.html   (998 words)

  
 part29   (Site not responding. Last check: 2007-10-22)
Although the very first members of the class Insecta were close behind the chelicerates in their forays Out of the water, for example, insects as we know them did not definitively appear for another 100 million years (near the end of the Carboniferous period).
The earliest uniramia to evolve and leave fossil records of themselves were the centipedes (2500 modern species) and millipedes (10,000-50,000 modern species).
Of all the living arthropods, these classes show the most superficial resemblance to their probable onychophoran-like ancestors.
goldenplains.sk.ca /courses/science/Bio20/Unit4/part29.htm   (187 words)

  
 Arthropoda
Most would agree that the use of polyphyletic 'concept' names, such as Uniramia, should be discontinued.
However, it is less clear what to do when the simple removal of one or a few unrelated taxa from a formerly polyphyletic taxon, leaving the concept more or less intact, and leaving a monophyletic taxon as well.
Occasionally the term Uniramia is also used in this context, as if it were a fourth sysnonym.
www.peripatus.gen.nz /Taxa/Arthropoda/Index.html   (4669 words)

  
 BIO3324 Lecture: Protozoa   (Site not responding. Last check: 2007-10-22)
Introduction, Onycophora, Tardigrada, Arthropoda, Uniramia, Diplopoda, Chilopoda, Crustacea, Chelicerata, Merostomata, Arachnida.
T he Uniramia includes insects, millipedes, and centipedes, and their name describes their
Consensus seems to be heading toward retaining the Uniramia designation with Tracheata following in second place.
salinella.bio.uottawa.ca /BIO3323/Lectures/bio3323_lect02_PanArth_Uniramia.htm   (549 words)

  
 Nutrition And Growth Of Uniramia - Big Nutrition Guide   (Site not responding. Last check: 2007-10-22)
Universal Nutrition, a sports supplement and health nutrition manufacturer, launched Ultra Iso Whey, the ultimate, ultrafiltrated whey protein isolate with absolutely no carbs, sugar, lactose or fat.
Juveniles consume mainly Uniramia in freshwater and zooplankton in...
JW (1993) Rejection of the " Uniramia " hypothesis and...
www.bignutritionguide.com /nutrition-and-growth-of-uniramia.html   (324 words)

  
 PSIgate - Physical Sciences Information Gateway: Search/Browse Results   (Site not responding. Last check: 2007-10-22)
Uniramia are known to date from the Middle Cambrian of Utah; the fossil record of this animal is somewhat incomplete, at least until the Silurian, when the first winged insect was recorded.
This Web page is a brief introduction to the fossil record of Uniramia through the geologic eras.
It includes links to the stratigraphy of the Cambrian, Devonian, Jurassic and Caenozoic; to the life history and ecology of the Uniramia; to systematics, morphology and notes on the Cretaceous mass extinction.
www.psigate.ac.uk /roads/cgi-bin/psisearch.pl?term1=Jurassic+system&subject=All&limit=0   (928 words)

  
 Stories02
So, some entities from lower densities are under the false impression that Uniramia's ascension is a "haul whatever remains away" Event.
Uniramia Lab is in part, a database collection of empirical cosmic research (so try to be on good behavior - ya lil' brats!).
Using local Uniramia ISPs, instead of partial or even funny truths, Agent Bollix orders minion Kered to begin posting intentionally misleading lies, mixed with truth, so that Mantidites are totally confused!
xenoclastic.netfirms.com /stories02.htm   (6316 words)

  
 New perspectives on the Mesozoic seed fern order Corystospermales based on attached organs from the Triassic of ...
The unusual architecture of the new Antarctic Umkomasia uniramia
The historical difficulties in deciphering the structure of
uniramia was included as a single terminal, i.e., as an exemplar
www.amjbot.org /cgi/content/full/87/6/757   (5014 words)

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