as those expressed around the protostome mouth, ref name Hejnol2008 cite journal doi 10.1038 ... 0028 0836 pmid 18806777 journal Nature ref There are other significant differences between the protostome .... Current molecular data suggest that protostome animals can be divided into three major ... oc Protostomia pl Pierwouste pt Protostomia ru simple Protostome sk Prvo stovce sh ... more details
Infobox Embryology GraySubject 6 GrayPage 47 DorlandsPre b 14 DorlandsSuf 12188030 A blastopore is an opening into the archenteron during the embryonic stages of an organism. The Embryological origins of the mouth and anus distinction between protostome s and deuterostome s is based on the direction in which the mouth stoma develops in relation to the blastopore. Protostome derives from the Greek word protostoma meaning first mouth whereas Deuterostome s etymology is second mouth from the words second and mouth . The major distinctions between deuterostomes and protostomes are found in embryonic development Mouth anus In protostome development, the first opening in development, the blastopore, becomes the animal s mouth . In deuterostome development, the blastopore becomes the animal s anus . Cleavage embryo Cleavage Protostomes have what is known as spiral cleavage which is determinate , this meaning that the fate of the cells is determined as they are formed. Deuterostomes have what is known as radial cleavage that is indeterminate . See also Blastula External links eMedicineDictionary Blastopore developmental biology stub Embryology Category Developmental biology ca Blast por cs Prvo sta de Urmund es Blastoporo fr Blastopore it Blastoporo ja pl Prag ba pt Blast poro ru sr uk ... more details
Summary Information Description Color coded pic of Halkieria sclerite zones. To be annotated via Template Annotated image. Refs cite journal title Articulated halkieriids from the Lower Cambrian of north Greenland author Conway Morris, S., and Peel, J.S. journal Nature volume 345 pages 802 805 date June 1990 doi 10.1038 345802a0 url http www.nature.com nature journal v345 n6278 abs 345802a0.html accessdate 2008 07 31 cite journal title Articulated Halkieriids from the Lower Cambrian of North Greenland and their Role in Early Protostome Evolution author Conway Morris, S., and Peel, J. S. journal Philosophical Transactions of the Royal Society Biological Sciences volume 347 issue 1321 pages 305 358 doi 10.1098 rstb.1995.0029 url http journals.royalsociety.org content 32l541667hj3071k accessdate 2008 07 31 year 1995 Source I created this work entirely by myself. Date Author User Philcha Philcha User talk Philcha talk other versions Licensing PD self date April 2009 ... more details
Karl Grobben born August 27, 1854 in Brno died April 13, 1945 in Salzburg was an Austria n biologist . ref name Uschmann cite book url http daten.digitale sammlungen.de bsb00016325 image 117 chapter Grobben, Karl author Georg Uschmann page 101 series Neue Deutsche Biographie title Sibenter Band. Grassauer Hartmann year 1966 publisher Duncker & Humblot language German ref He graduated from, and later worked at, the University of Vienna , chiefly on Mollusca molluscs and crustacean s. He was also the editor of a new edition of Carl Friedrich Wilhelm Claus Lehrbuch der Zoologie , and the coiner of the terms protostome and deuterostome . ref name Uschmann Taxonomy Taxa named by Grobben include Eumalacostraca small Grobben, 1892 small Sagittidae small Claus & Grobben, 1905 small Sagittoidea small Claus & Grobben, 1905 small Protostome Protostomia small Grobben, 1908 small Deuterostome Deuterostomia small Grobben, 1908 small Taxa named in Grobben s honour include Gerbillus grobbeni small Klaptocz, 1909 small ref cite book title The Eponym Dictionary of Mammals author Bo Beolens, Michael Watkins & Michael Grayson year 2009 publisher Johns Hopkins University Press isbn 9780801893049 chapter Grobben page 169 url http books.google.co.uk books?id I kSmWLc6vYC&pg PA169 ref Sphaerophthalmus grobbeni small Spandl, 1923 small ref name BEMON cite web url http test.b neat.org bemon ?page petymol.g.html title Karl Grobben work Biographical Etymology of Marine Organism Names author Hans G. Hanssen publisher Baltic and North East Atlantic Taxa accessdate April 4, 2011 ref Limnadia grobbeni small Daday, 1925 small ref name BEMON Actinia grobbeni small Watzl, 1922 small ref name BEMON Paladilhiopsis grobbeni small Kuscer, 1928 small ref name BEMON Raillietina grobbeni small B hm, 1925 small ref name BEMON Trypanophis grobbeni small Poche, 1904 small ref name BEMON References reflist Persondata Metadata see Wikipedia Persondata . NAME Grobben, Karl ALTERNATIVE NAMES SHORT DESCRIPTION Aust ... more details
happened at least twice, following different paths in protostome s and deuterostome s. This accompanied ... of fused, specialized segments. Development main protostome deuterostome In animals at least as complex ... forms the mouth. The protostome s were so named because it used to be thought that in their embryos ... more details
notoc Grzimek s Animal Life Encyclopedia is a large comprehensive encyclopedia of animal life. It is named after its original editor in chief, Bernhard Grzimek IPA de m k pron . ref name factsheet Cite web title Grzimek s Animal Life Encyclopedia fact sheet publisher Gale Cengage Learning year 2008 url http www.gale.cengage.com pdf facts Grzimek.pdf format PDF doi accessdate 2010 09 27 ref Originally the encyclopedia was published as a 13 volume set in German language German under the name Grzimeks Tierleben Grzimek s Animal Life in 1967 1972 it was translated into English language English in 1972 75. The encyclopedia was an international collaboration by a number of scientists including Theodor Haltenorth , Wolfgang Gewalt , Heinz Georg Kl s , Konrad Lorenz , Heinz Heck , Lutz Heck , Jean Dorst , Constantine Walter Benson , Iren us Eibl Eibesfeldt , Helmut Sick , Heini Hediger , Wolfgang Makatsch , Erich Thenius , Erna Mohr , Adolf Portmann , Nagamichi Kuroda , Lester L. Short , Gerlof Fokko Mees , and Andrew John Berger . It was later extensively updated and republished in a 17 volume second edition under the supervision of Michael Hutchins in 2003. Some university libraries offer access to a digitized version of the second edition. The German edition also published three supplementary volumes Entwicklungsgeschichte der Lebewesen History of Life , Verhaltensforschung Behavioural Research and Unsere Umwelt als Lebensraum kologie Our Environment as Living Space Ecology . Online portal In Fall 2009, Gale Cengage released a web based version of the encyclopedia, with access to the web site by subscription. The site allows users to rate articles and to submit videos and photography. Volumes Volume 1 Lower Metazoan s and Lesser Deuterostome s Volume 2 Protostome s Volume 3 Insect s Volume 4 5 Fish Volume 6 Amphibian s Volume 7 Reptile s Volume 8 11 Bird s Volume 12 16 Mammal s Volume 17 Index See also Brehms Tierleben References references External links http www.g ... more details
Taxobox name Acrocirridae image image width image caption regnum Animal ia phylum Annelida classis Polychaete Polychaeta subclassis Palpata ordo Canalipalpata subordo Terebellida familia Acrocirridae familia authority Banse, 1969 subdivision ranks Genera subdivision 8, see text Acrocirridae is a family biology family of polychaete worm s. Acrocirrids are detritivore s deposit feeders , catching marine snow falling particles with numerous long prostomium prostomial tentacle s. There are eight known genus genera , and at least 21 described species and subspecies within the Acrocirridae family. The acrocirrids are primarily Benthic zone benthic seabed dwelling animals, but at least two genera Swima and Teuthidodrilus appear to have evolved or adapted to a pelagic fish pelagic free swimming habitat . ref name Osborn2010 Systematics Following is a list of genera and species within the Acrocirridae family ref name Zipcodezoo Genus Acrocirrus A. aciculigerus A. crassifilis A. frontifilis A. heterochaetus A. leidyi Genus Chauvinelia C. biscayensis Genus Chauviniella Genus Flabelligella F. biscayensis F. cirrata F. macrochaeta F. mediterranea F. papillata Genus Flabelligena Genus Macrochaeta M. australiensis M. bansei M. caroli M. clavicornis M. helgolandica M. leidyi M. pege M. polyonyx Genus Swima S. bombiviridis also known as Green Bomber Worm or Bombardier Worm small Osborn et al , 2009 , Monterey Bay , California Genus Teuthidodrilus T. samae also known as Squidworm small Osborn et al , 2010 , Celebes Sea , East Indian Archipelago See also Eumetazoa Bilateria Protostome Protostomia Spiralia Lophotrochozoa Trochophore References Reflist colwidth 30em refs ref name Osborn2010 cite journal author Osborn KJ, Madin LP, Rouse GW title The remarkable squidworm is an example of discoveries that await in deep pelagic habitats journal Biology Letters volume issue pages in press year 2010 doi 10.1098 rsbl.2010.0923 accessdate 2010 11 25 ref ref name Zipcodezoo cite web author titl ... more details
a few smaller phyla. The protostome s include most of the rest, such as arthropod s, annelid ... another protostome superphylum, Platyzoa , while others would include the Platyzoans in Lophotrochozoa ... origins support protostome affinities. ref Helfenbein, Kevin G., H. Matthew Fourcade, Rohit G ... more details
into two groups, the protostome s and deuterostomes, and chordates are deuterostomes. ref name ... 1161 6 doi 10.1002 bies.20507 accessdate 2007 05 21 pmid 17120226 ref If so, this means that the protostome ... more details
between chaetognaths and nematodes mentioned above may support the protostome thesis in fact ... 16890509 issue 15 ref Chaetognatha appears close to the base of the protostome tree in most studies ... phylogenomics a protostome with deuterostome like development journal Current Biology volume 16 ... their distinctive protostome embryonic characters, they may have retained deuterostome characters ... more details
Refimprove date June 2010 coelomate basic The coelom IPAc en icon s i l m respell sea lum is a fluid filled cavity formed within the mesoderm . Coeloms developed in triploblast s but were subsequently lost in several lineages. Loss of coelom is correlated with reduction in body size. Coeloms are only ever present in triploblast ic animals, though coelom is sometimes incorrectly used to refer to any developed digestive tract. Functionally, a coelom can absorb shock or provide a hydrostatic skeleton . It also allows organs to grow independently off the body wall. This can be seen in the digestive tract of earthworms and other annelid s, which is suspended within the body in a mesentery derived from a mesoderm lined coelom. In mammals , the coelom forms the Peritoneum peritoneal , Pleural cavity pleural , and Pericardial sinus pericardial cavities. In the past, zoologists grouped animals based on characters related to the coelom. The presence or absence of a coelom and the way in which it was formed was believed to be important in understanding the Phylogenetics phylogenetic relationships of animal Phylum phyla . However, recent molecular phylogenies have suggested this characteristic is not as informative as previously believed. Citation needed date November 2008 The coelom may have arisen twice, once in protostome s and once among the deuterostome s. ref name Xiao2008 Cite journal last1 Xiao first1 S. last2 Laflamme first2 M. year 2008 journal Trends in Ecology & Evolution doi 10.1016 j.tree.2008.07.015 title On the eve of animal radiation phylogeny, ecology and evolution of the Ediacara biota pmid 18952316 volume 24 issue 1 pages 31 40 postscript Bot inserted parameter. Either remove it or change its value to . for the cite to end in a . , as necessary. inconsistent citations ref See also Abdominal cavity Body cavity References reflist Further reading cite book author Dudek, Ronald W. Fix, James D. chapter Body Cavities title Embryology publisher Lippincott Will ... more details
Taxobox name Platyzoa image Bedford s Flatworm.jpg image width 200px image caption Pseudobiceros bedfordi Bedford s Flatworm regnum Animal ia subregnum Eumetazoa unranked superdivisio Bilateria superphylum Platyzoa superphylum authority Thomas Cavalier Smith Cavalier Smith , 1998 subdivision ranks Phyla subdivision Platyhelminthes Gastrotricha Gnathifera phylum Gnathifera unranked Rotifer a Acanthocephala Gnathostomulid a Limnognathia Micrognathozoa Symbion Cycliophora The Platyzoa pron en pl t zo . are a group of protostome animals proposed by Thomas Cavalier Smith in 1998. Cavalier Smith included in Platyzoa the Phylum flatworm Platyhelminthes or flatworm s, and a new phylum, Acanthognatha, into which he gathered several previously described phyla of microscopic animals. Subsequent studies have supported Platyzoa as a clade , ref name pmid16556507 cite journal author Passamaneck Y, Halanych KM title Lophotrochozoan phylogeny assessed with LSU and SSU data evidence of lophophorate polyphyly journal Mol. Phylogenet. Evol. volume 40 issue 1 pages 20 8 year 2006 month July pmid 16556507 doi 10.1016 j.ympev.2006.02.001 url http linkinghub.elsevier.com retrieve pii S1055 7903 06 00051 0 ref a Monophyly monophyletic group of organisms with a common ancestor, while differing on the phyla included and on relationships within Platyzoa. Phyla One current scheme places the following traditional phyla in Platyzoa Flatworm Platyhelminthes Gastrotrich a Gnathifera phylum Gnathifera Rotifer a Acanthocephala Gnathostomulid a Limnognathia Micrognathozoa Symbion Cycliophora Characteristics The Platyhelminthes and Gastrotricha are body cavity acoelomate . The other phyla have a Body cavity Pseudocoel pseudocoel , and share characteristics such as the structure of their jaws and pharynx , although these have been secondarily lost in the Parasite parasitic Acanthocephala. They form a monophyletic subgroup called the Gnathifera . The name Platyzoa is used because most members are fla ... more details
or at least a protostome , the protostome and deuterostome lineages must have diverged significantly ... more complex than jellyfish and other Cnidarians are split into two groups, the protostome s and deuterostome ... If so, this means that the protostome and deuterostome lineages must have split some time before Kimberella ... if it is not a protostome, it is widely accepted as a member of the more inclusive bilaterian clade ... more details
Taxobox name Lophotrochozoa fossil range Early Cambrian Recent image Caribbean reef squid.jpg image width 200px image caption Caribbean Reef Squid or Sepioteuthis sepioidea is a complex lophotrochozoan. regnum Animal ia subregnum Eumetazoa unranked superdivisio Bilateria superphylum Lophotrochozoa subdivision ranks Phyla subdivision Sipuncula Hyolitha extinction Nemertea Phoronida Bryozoa Entoprocta Brachiopoda Mollusca Annelida Echiura The Lophotrochozoa pron en l f tr k zo . , crest wheel animals are a major grouping of protostome animals. The taxon was introduced in 1995 in a paper by Kenneth M Halanych et al. based on molecular data. Molecular evidence such as a result of studies of the evolution of small subunit ribosomal RNA rRNA supports the Clade monophyly of the phylum phyla listed in the infobox shown at right. ref Philippe, Herv , Nicolas Lartillot1 and Henner Brinkmann. 2005 Multigene Analyses of Bilaterian Animals Corroborate the Monophyly of Ecdysozoa, Lophotrochozoa, and Protostomia. Molecular Biology and Evolution 2005 22 5 1246 1253 doi 10.1093 molbev msi111 . ref Terminology The word lophotrochozoan is sometimes equated with spiralian . ref name pmid18192183 cite journal author Giribet G title Assembling the lophotrochozoan & 61 spiralian tree of life journal Philos. Trans. R. Soc. Lond., B, Biol. Sci. volume 363 issue 1496 pages 1513 22 year 2008 month April pmid 18192183 pmc 2614230 doi 10.1098 rstb.2007.2241 url http rstb.royalsocietypublishing.org cgi pmidlookup?view long&pmid 18192183 ref When used in a broader sense sensu lato , it can include rotifers and platyhelminthes . ref name urlExplanations.html cite web url http science.kennesaw.edu jdirnber InvertZoo Tree Explanations.html title Explanations.html work accessdate 2009 06 28 ref When used sensu stricto , it refers to a subgroup of Spiralia. Groups The Lophotrochozoa comprise two groups, the trochozoans and the lophophorata. The exact relationships between the different phyla are ... more details
Kenneth M. Halanych is a professor in zoology at the Auburn University , Alabama . He was born in Baltimore in 1966. He received his PhD in Zoology in 1994, from University of Texas. He works on higher level systematics of invertebrates, mainly marine. According to the Web of Knowledge he has published 123 peer reviewed scientific papers, 43 of them cited 10 or more times. The most widely referred to are Halanych KM, Bacheller JD, Auginaldo AMA, Liva SM, Hillis DM, Lake JA. Evidence from 18S ribosomal DNA that the Lophphorates are protostome animals Science 267 5204 1641 1643 1995 Times Cited 286 Halanych KM. The new view of animal phylogeny Annual Review of Ecology and Systematics 35 229 256 2004 Times Cited 173 Black MB, Halanych KM, Maas PAY, Hoeh WR, Hashimoto J, Desbruyeres D, Lutz RA, Vrijenhoek RC. Molecular systematics of vestimentiferan tubeworms from hydrothermal vents and cold water seep Marine Biology 130 2 141 149 1997 Times Cited 85 Halanych KM. The Phylogenetic Position of the Pterobranch Hemichordates Based on 18S rDNA Sequence Data Molecular Phylogenetics and Evolution 4 1 72 76. Times Cited 67 Halanych KM. Testing hypotheses of Chaetognath origins Long branches revealed by 18S ribosomal DNA Systematic Biology 45 2 223 246 1996 Times Cited 58 Passamanek Y, Halanych KM Lophotrochozoan phylogeny assessed with LSU and SSU data Evidence of lophphorate polyphyly Molecular Phylogeneticsand Evolution 40 1 20 28. Times Cited 57 Shank TM, Black MB, Halanych KM, Lutz RA, Vrijenhoek RC Miocene radiation of deep sea hydrothermal vent shrimp Caridea Bresiliidae Evidence from mitochondrial cytochrome oxidase subunit I Molecular phylogenetics and Evolution 13 2 244 254 1999 Times Cited 56 Halanych KM, Robinson TJ Multiple substitutions affect the phylogenetic utility of cytochrome b and 12S rDNA data Examining a rapid radiation in Leporid Lagomorpha evolution Journal of Molecular Evolution 48 3 369 379. Times Cited 54 Halanych KM, Lutz RA, Vrijenhoek RC. Evolution ... more details
of the eggs is a mixture of deuterostome and protostome of characteristics. Early Cleavage embryo divisions ... of their embryos, deuterostomes form the anus before the mouth, while protostome s form the mouth ... , a protostome super phylum that includes mollusc s, annelid s and flatworm s but excludes the other main protostome super phylum Ecdysozoa , whose members include arthropod s. ref name Halanych2004 ... Protostome Taxa An Introduction and a Tribute to Robert P. Higgins journal Integrative and Comparative ... the Protostome Affinity of Brachiopods journal Systematic Biology year 2001 volume 50 issue 6 ... more details
Refimprove date July 2007 File Blastulation.png thumb 240px right 1 morula, 2 blastula File Gastrulation.png thumb 240px 1 blastula, 2 gastrula with blastopore orange ectoderm, red endoderm. Embryology from Ancient Greek Greek lang grc , embryon , unborn, embryo and lang grc , logy logia is a science which is about the development of an embryo from the fertilization of the ovum to the fetus stage. After cleavage, the dividing cells, or morula , becomes a hollow ball, or blastula , which develops a hole or pore at one end. In bilateria bilateral animal s, the blastula develops in one of two ways that divides the whole animal kingdom into two halves see Embryological origins of the mouth and anus . If in the blastula the first pore blastopore becomes the mouth of the animal, it is a protostome if the first pore becomes the anus then it is a deuterostome . The protostomes include most invertebrate animals, such as insects, worms and molluscs, while the deuterostomes include the vertebrates . In due course, the blastula changes into a more differentiated structure called the gastrula . The gastrula with its blastopore soon develops three distinct layers of cells the germ layers from which all the bodily organs and tissues then develop The innermost layer, or endoderm , gives rise to the digestive organs, lungs and bladder. The middle layer, or mesoderm , gives rise to the muscles, skeleton and blood system. The outer layer of cells, or ectoderm , gives rise to the nervous system and skin. In humans, the term embryo refers to the ball of dividing cells from the moment the zygote implants itself in the uterus wall until the end of the eighth week after conception. Beyond the eighth week, the developing human is then called a fetus. Embryos in many species often appear similar to one another in early developmental stages. The reason for this similarity is because species have a shared evolutionary history. These similarities among species are called homologou ... more details
automatic taxobox fossil range fossil range Early Cambrian Recent image Centipede.jpg image caption Centipede authority Aguinaldo et al., 1997 subdivision ranks Phylum biology Phyla subdivision Kinorhyncha Loricifera Priapulida Nematoda Nematomorpha Lobopodia Onychophora Tardigrada Arthropoda Ecdysozoa pron en kd s zo . is a group of protostome animals, ref name pmid18192181 cite journal author Telford MJ, Bourlat SJ, Economou A, Papillon D, Rota Stabelli O title The evolution of the Ecdysozoa journal Philos. Trans. R. Soc. Lond., B, Biol. Sci. volume 363 issue 1496 pages 1529 37 year 2008 month April pmid 18192181 pmc 2614232 doi 10.1098 rstb.2007.2243 url http rstb.royalsocietypublishing.org cgi pmidlookup?view long&pmid 18192181 ref including Arthropod a insects , chelicerata , crustaceans , and myriapods , roundworm Nematoda , and several smaller phylum biology phyla . They were first defined by Aguinaldo et al. in 1997, based mainly on trees constructed using 18S ribosomal RNA genes. ref cite journal last Aguinaldo first A. M. A. coauthors J. M. Turbeville, L. S. Linford, M. C. Rivera, J. R. Garey, R. A. Raff, & J. A. Lake year 1997 title Evidence for a clade of nematodes, arthropods and other moulting animals journal Nature volume 387 pages 489 493 doi 10.1038 387489a0 pmid 9168109 issue 6632 ref A large study in 2008 by Dunn et al. strongly supported the Ecdysozoa as a clade , that is, a group consisting of a common ancestor and all its descendants. ref name nature phylo cite journal last Dunn et al. title Broad phylogenomic sampling improves resolution of the animal tree of life journal Nature volume 452 pages 745 749 url http www.nature.com nature journal v452 n7188 abs nature06614.html doi 10.1038 nature06614 year 2008 pmid 18322464 first1 CW last2 Hejnol first2 A last3 Matus first3 DQ last4 Pang first4 K last5 Browne first5 WE last6 Smith first6 SA last7 Seaver first7 E last8 Rouse first8 GW last9 Obst first9 M issue 7188 ref The group is also support ... more details
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