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Topic: Subphylum

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  Subphylum Summary
A subphylum is a classification group used in taxonomy.
In biology, a subphylum is a taxonomic rank intermediate between phylum and superclass.
The rank of subdivision in plants and fungi is equivalent to subphylum.
www.bookrags.com /Subphylum   (176 words)

  Highbeam Encyclopedia - Search Results for Subphylum
Ricinulei (subphylum Chelicerata, class Arachnida) An order of small (5–10 mm long), slow-moving arachnids in which the cuticle is thick and often sculptured and the mouth-parts and chelicerae are covered by a hood that can be raised and lowered.
Trichostomatida (subphylum Ciliophora, class Ciliatea) An order of ciliate protozoa that are characterized by the structure of the cytostome region, where there is a ciliated depression leading into a buccal cavity lacking cilia, at the base of which occurs the cytostome.
Atelostomata (subphylum Echinozoa, class Echinoidea) A superorder of irregular echinoids characterized by the lack of compound ambulacra, Aristotle's lantern, girdle, or gill slits.
www.encyclopedia.com /SearchResults.aspx?Q=Subphylum&StartAt=21   (642 words)

 Subphylum - EvoWiki   (Site not responding. Last check: 2007-10-12)
A subphylum (pl: "subphyla") is a special level of classification in the taxonomy of organisms that falls between phylum and class.
Acknowledgement of subphyla is appropriate when there are important or salient traits that appear only in some classes of a given phylum.
The subphylum vertebrata consists of chordates whose notochord is encased in a backbone:
wiki.cotch.net /index.php/Subphylum   (98 words)

 Vertebrate Evolution and Diversity
[Below are two possible phylogenies of subphylum Agnatha, one in which the agnathans for a monophyletic taxon and the other in which the lampreys and the gnathostomes together form a monophyletic taxon which excludes the hagfish; note regardless that the hagfish in this phylogeny are included among the craniates but not among the vertebrates (see:
The vertebrates make their first appearance into the fossil record approximately 500 million years ago, i.e., one-half billion years ago
The evolution of these unique vertebrate structures was probably associated with increasing size and more active foraging for food.
www.mansfield.ohio-state.edu /~sabedon/campbl34.htm   (1219 words)

 The Trilobites (Subphylum Trilobita Phylum Arthropoda)
Here the Arthropoda are a phylum which is divided into at least 4 subphyla, three of which are still extant (have living members); Chelicerata, Crustacea and Uniramia (See Arthropoda).
The trilobites are included in a separate subphylum called Trilobitomorpha (Trilobite like animals), within which the trilobites comprise a class, class Trilobita, this class in turn contains 8 orders.
While trilobites, with there obvious successfulness as a group of animals, continue to fascinate many people, and even though modern research techniques continue to improve there is still much about the ordinary everyday lives of trilobites that remains a mystery.
www.earthlife.net /inverts/trilobita.html   (1668 words)

 Search Results for "Subphylum"
...trilobite, (tri´lbit´) (KEY), subphylum of the phylum Arthropoda that includes a large group of extinct marine animals that were abundant in the Paleozoic era.
...A chordate marine animal of the subphylum Urochordata; a tunicate.
A member of the subphylum Vertebrata, a primary division of the phylum Chordata that includes...
www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=Subphylum   (334 words)

 Highbeam Encyclopedia - Search Results for Subphylum
Perischoechinoida (subphylum Echinozoa, class Echinoidea) A subclass of regular echinoids, without compound plates, in which the perignathic girdle is absent or of apophyses only, the teeth are grooved, and there are no gill slits or spheridia.
Acroechinoidea (subphylum Echinozoa, class Echinoidea) A taxonomic rank, between the subclass and superorder levels, that comprises a monophyletic group consisting of all Euechinoidea except for the Echinothurioida.
Actinopodea (subphylum Sarcomastigophora, superclass Sarcodina) A class of Protozoa that are typically spherical amoebae with radiating pseudopodia.
www.encyclopedia.com /SearchResults.aspx?Q=Subphylum&StartAt=11   (656 words)

 chelicerata subphylum
Chelicerata subphylum contribute to reductions chelicerata subphylum tobacco-related morbidity and death, and success in one area might contribute chelicerata subphylum improvements in the other areas as chelicerata subphylum Increasing tobacco-use chelicerata subphylum for chelicerata subphylum will reduce exposure to ETS.
Choosing chelicerata subphylum that chelicerata subphylum in general and that are well-matched to local needs chelicerata subphylum chelicerata subphylum and then implementing those interventions well are chelicerata subphylum steps for chelicerata subphylum tobacco use and ETS exposure.
In setting priorities for the chelicerata subphylum of chelicerata subphylum to meet local objectives, recommendations chelicerata subphylum other evidence chelicerata subphylum in the Community Guide should be considered chelicerata subphylum with such local information as resource availability, administrative structures, and economic, social, and regulatory environments of organizations and practitioners.
mywebpage.netscape.com /sugicall/chelicerata-subphylum.html   (334 words)

 Diversity, Localization, and Physiological Properties of Filamentous Microbes Belonging to Chloroflexi Subphylum I in ...
Diversity, Localization, and Physiological Properties of Filamentous Microbes Belonging to Chloroflexi Subphylum I in Mesophilic and Thermophilic Methanogenic Sludge Granules -- Yamada et al.
Localization of Chloroflexi subphylum I populations in UASB sludge granules.
Enrichment and isolation of Chloroflexi subphylum I-type filaments from mesophilic and thermophilic UASB sludge granules.
aem.asm.org /cgi/content/full/71/11/7493   (5395 words)

As the name implies, the first pair of appendages of the two classes within Subphylum Chelicerata are modified into pincerlike mouthparts called chelicerae.
Members of Subphylum Crustacea all have appendages that are biramous (two-branched).
Subphylum Uniramia includes Class Insecta (bees, wasps, beetles, flies, fleas, butterflies, moths, etc.), Class Diplopoda (millipedes) and Class Chilopoda (centipedes).
www.biosci.ohiou.edu /introbioslab/bios173/173_7.htm   (557 words)

 Reading notes for Echinoderms
For example, blastoids and crinoids are considered as separate subphylums in the text but other authors place them into one subphylum as separate classes.
The subphylums Crinozoa and Blastozoa are often referred to collectively as the "pelmetazoans".
They may have an important place in the overall evolution of the echinoderms (section 9.8) since they may be the ancestral group of Subphylum Echinozoa.
www.uwm.edu /People/mtharris/Paleo2002/RN18.htm   (1227 words)

 The Cladistic Analysis and Reclassification of the Ascomycota   (Site not responding. Last check: 2007-10-12)
  The first subphylum would be the Taphrinomycotina, which are grouped together on the basis of the being unicellular and lacking ascogenous hyphae, an ascocarp, and gametangia.
  The second subphylum would be the Pezizomycotina, which are grouped together on the basis of being multi-cellular and multi-nucleate.
Clade B should be grouped under the subphylum Pezizomycotina (Figure 1).
www.susqu.edu /students/b/bradleyl/Ascomycota.htm   (1339 words)

 PHYLUM CHORDATA   (Site not responding. Last check: 2007-10-12)
The phylum Chordata is a very large group of animals which include the Subphylum Vertebrata (humans, dogs, cows, whales, ect.), Subphylum Cephalochordata (lancelets) and Subphylum Urochordata (sea squirts, tunicates and salps).
All members of this phylum possess a dorsal nerve cord, a notochord and a pharynx with paired gill slits.
Two, the egg and sperm are fertilized internally using the atrium to brood the developing larvae.
www.nwmarinelife.com /html/chordata.html   (238 words)

This Subphylum includes the star shaped, mobile benthic echinoderms.
The subphylum has two major groups: asteroids and ophiuroids based on the presence or absence of a central disc.
The Asteroids, or starfish, have thick, hollow arms with prominent ambulacral grooves extending to the tips of the arms on the ventral side.
paleo.cortland.edu /tutorial/Echinoderms/echinoderms3.htm   (646 words)

 Biological Diversity 9
Some suggest larvae became sexually mature without developing tunicate characteristics; thus, a urochordate larva was ancestral to vertebrates; or a cephalochordate larva may have been ancestral to vertebrates.
The 23 species of lancelets are in the genus Branchiostoma in the subphylum Cephalochordata.
Vertebrates have an internal skeleton of cartilage or bone, with vertebrae surrounding the dorsal nerve cord.
www.emc.maricopa.edu /faculty/farabee/BIOBK/BioBookDiversity_9.html   (6168 words)

 ipedia.com: Chordate Article   (Site not responding. Last check: 2007-10-12)
In the subphylum urochordata the larvae have a notochord and nerve cord but the adults have neither.
Cephalochordates have a notochord and a nerve cord but no vertebra and in vertebrates the notochord has been replaced by a bony vertebral column.
One in the subphylum urochordata, one in the subphylum cephalochordata, and eight in the subphylum vertebrata.
www.ipedia.com /chordate.html   (262 words)

 Definition of subphylum - Merriam-Webster Online Dictionary
Learn more about "subphylum" and related topics at Britannica.com
Find more about "subphylum" instantly with Live Search
See a map of "subphylum" in the Visual Thesaurus
www.m-w.com /cgi-bin/dictionary?book=Dictionary&va=subphylum   (40 words)

 Subphylum Crustacea
An omnivorous feeding habit is typical of crustaceans, although there are many strict herbivores, carnivores, and detritivores.
Members of the subphylum Crustacea are characterized by a head with paired mandibular jaws, a pair of maxillae, and two pairs of antennae.
Chapter XXII: Subphylum Crustacea (cladocerans [water fleas], shrimps, copepods, amphipods [scuds], sow bugs, crayfish, fish lice) in Word 6.0
lakes.chebucto.org /ZOOBENTH/BENTHOS/xxii.html   (659 words)

 Phylum Chordata
From MEER (Marine and Environmental Education and Research, Inc.) an excellent description of Chordata with a list of subphylums, classes and families.
From MEER (Marine and Environmental Education and Research, Inc.) a description of the Subphylum and Classes Ascidiacea, Appendicularia and Thaliacea.
A description of the Subphylum Vertebrata with a discussion of the characteristics and phylogenetic relationships.
mclibrary.nhmccd.edu /taxonomy/chordata.html   (2363 words)

 : Zoology/Subphylum_Uniramia   (Site not responding. Last check: 2007-10-12)
Links to the fossil record, life history and ecology, systematics, and morphology.
Subphylum Uniramia - Links to classes Chilopoda, Diplopoda, and Insecta.
The insect page has links to selected orders of insects.
www.mhhe.com /links/pages/Zoology/Subphylum_Uniramia   (98 words)

 Arthropoda-BY255L Invertebrate Zoology
Some authorities place the Pycnogonids in their own subphylum instead of a class under Chelicerata.
Subphylum Trilobita (victims of the Great Permian Extinction)
Introduction to the Pycnogonida - UCMP Berkeley (assigned its own subphylum)
www.dpo.uab.edu /~acnnnghm/BY255L/BY255L-Arthropoda.htm   (142 words)

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