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| | Untitled Document |
 | | Brusca Brusca’s cladistic analysis of protostomes and deuterostomes. | | | The mouth developing primarily from the blastopore and the frequent use of chitin in Lophophores are both protostomic in nature (Doherty, 2001). | | | After consideration, we conclude that the evidence supports the view that the Ectoprocts have been placed in protostomes due to the blastopore forming a mouth. |
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http://comenius.susqu.edu/BI/201/01/chaplin/systematics_papers.htm
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| | Pharyngula |
| | One possibility is that chaetognaths are protostomes that, at some distant time in their history, flipped their body plan around. | | | The deuterostome and protostome distinction is thought to be a fundamental one, reflecting an early decision about how to organize the body plan. | | | Where deuterostomes and protostomes differ is in what they do with the blastopore. |
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http://pharyngula.org/index/weblog/print/1246
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| | In the beginning....Protostomes and Deuterostomes |
| | Rather, as evidence supporting or refuting one aspect of a theory accumulates, that portion of the theory may be modified to reflect the new information. | | | However, like any other theory, additional information indicates the characteristicswe use to define this split may not be as clear and distinct as we once thought. | | | Why are patterns in the earliest stages of animal development useful for determining phylogenetic relationships? |
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http://science.kennesaw.edu/biophys/biodiversity/animalia/stomes.htm
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| | IB 104 - Lecture 5 - Molluscs to Arthropods - 9/2/04 |
| | The relationship of the mollusks to the other protostome phyla is uncertain. | | | Almost all other protostome lineages are characterized by segmented bodies. | | | First, nematodes, nemertea, and rotifers would classify as protostomes by this system, and many biologists do this. |
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http://www.life.uiuc.edu/bio104/l5MolluscArthropod.html
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| | Protostome - Wikipedia, the free encyclopedia |
| | That would mean that deuterostomy is the ancestral and original condition and the most primitive way for the Bilateria to develop from eggs to adults. | | | The major distinctions between deuterostomes and protostomes are found in embryonic development. | | | This would be difficult for the familiar animal species of today, but early animal species would have had simpler and less specialized morphology, so species found it possible to experiment with their morphogenesis in fundamental new ways. |
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http://en.wikipedia.org/wiki/Protostome
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| | The awarded grant will contribute to the training of students at different academic levels, emphasizing underrepresented groups in science. | | | A grant has been awarded to Dr. Gonzalo Giribet (Museum of Comparative Zoology, Harvard University), Dr. Mark Martindale (Kewalo Marine Laboratory, University of Hawaii) and Ward Wheeler (American Museum of Natural History) to assemble the basic backbone of the Protostome Tree of Life, which includes all triploblastic animals except those directly related to vertebrates. | | | Protostomes constitute more than one million of the 1.7 million named species of living organisms, including familiar animals such as mollusks, insects, flatworms, roundworms, and many others of medical and economic importance. |
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http://www.mcz.harvard.edu/Departments/InvertZoo/tol
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| | SYSTEMATIC BIOLOGY |
| | The molecular systems (see Figures 3 and 4 from Tudge, 2000 and Raff, 2001, respectively) have focused on different defining synapomorphies and thus separate the protostomes into two large groups: the Ecdysozoa and the Lophotrochozoa. | | | This is a cladogram of some protostome phyla modified from Raff (2001). | | | Also, the phyla of the "cycloneuralia" and "articulata" of the structural systems are spread between the Lophotrochozoa and Ecdysozoa. |
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http://comenius.susqu.edu/bi/202/Animals/PROTOSTOMES/PROTOSTOME-SYSTEMS.htm
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| | Chapter 33: Invertebrates |
| | protostome pseudocoelomates (complete digestive systems become the norm) | | | Protostome Development à spiral, determinate cleavage; blastopore becomes mouth |
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http://spot.colorado.edu/~didomeni/Chapter38.htm
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| | Animal Evolution (General Biology) - Wikibooks, collection of open-content textbooks |
| | The features of animals that have been interpreted as suggesting a tuning fork model are extremely basic characteristics of body organization and early embryonic development. | | | Tissues are defined as an integrated group of cells that share a common structure and a common function (for example, nervous tissue or muscle tissue). | | | The distinction is based on several fundamental characteristics of early development. |
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http://en.wikibooks.org/wiki/Animal_Evolution_(General_Biology)
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| | Introduction to the Protostomes |
| | Fig 4 A protostome gastrula viewed from the side. | | | Daughters of the micromeres have been omitted for clarity. | | | Fig 5 Two views of a late protostome gastrula showing the expansion and splitting of the teloblast areas to form mesoderm and the coelom. |
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http://www.lander.edu/rsfox/310protoLec.html
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| | SICB |
| | Ken Halanych is currently at Woods Hole Oceanographic Institute and has carried out studies involving several lesser-known groups such as chaetognaths, pterobranchs and hydrothermal vent worms. | | | University of Arkansas- Clint Turbeville is most well known for his definitive morphological and molecular studies that proved that nemerteans are protostomes not related to flatworms (Turbeville et al. | | | This symposium was designed to play a role in renewing interest in the lesser- known animal groups, encourage their use in research and teaching and promote the relevance of high-level systematic studies. |
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http://chuma.cas.usf.edu/~garey/sicb.html
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| | Kingdom Animalia |
| | In protostomes, the blastopore becomes the mouth of the organism, while deuterostomes develop so that the blastopore becomes the anus. | | | However, each protostome cell would develop only into a part of that organism. | | | This means that if one were to take, say, a 16-cell morula of a protostome and a deuterostome and cut each into 16 separate pieces, each deuterostome cell would develop into a full organism. |
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http://www.sidwell.edu/us/science/vlb5/Labs/Classification_Lab/Eukarya/Animalia
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| | Protostome and Deuterostome Conditions |
| | Protostomes are bilaterally symmetrical, have three germ layers, the organ level of organization, the tube-within-a-tube body plan, and a true coelom. | | | The blastopore is associated with the anus, and the second embryonic opening is associated with the mouth. | | | Protostomes (mollusks, annelids, and arthropods) develop so that the first opening in the embryo is the mouth (protostome = first mouth). |
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http://www.cartage.org.lb/en/themes/Sciences/Zoology/Animalclassification/Polygenetic/Protostome/ProtostomeDeuterostome/ProtostomeDeuterostome.htm
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| | Lecture Invertebrates Part 2 |
| | While both protostomes and deuterostomes form a coelom, the evidence from embryological development suggests convergent evolution, the coelom arising independently in these groups. | | | Although the early deuterostomes were not much different from their protostome cousins, they possessed great potential, which the brainy chordates amply exemplify. | | | The coelomates include mollusks, annelids, arthropods &emdash; all protostomes; and echinoderms and chordates both deuterostomes. |
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http://home.earthlink.net/~dayvdanls/AE_lecture2.htm
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| | Hexapedia - Animal |
| | The Deuterostomes differ from the Protostomes in various ways. | | | There are various pseudocoelomate protostomes that are hard to classify because of their small size and reduced structure. | | | Usually there is a hollow space around the gut, called the coelom, arising from a split within the mesoderm, or at least some reduced version thereof (eg a pseudocoelom, where the split occurs between the mesoderm and endoderm, common in microscopic forms). |
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http://www.hexafind.com/encyclopedia/animal
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| | Kingdom |
| | The term protostome means "first mouth" which is a reference to the first opening of the digestive system. | | | Like Platyhelminthes, Rotifers are protostomes but they differ in having a body cavity. | | | They are characterized by having either a lophophore feeding structure or a trochozoan larvea. |
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http://bioweb.wku.edu/faculty/Lienesch/225/225lab3.html
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| | Bryozoan Introduction |
| | Their development does not follow either a true protostome or true deuterostome pattern. | | | Bryozoans, sometimes referred to as moss animals or ectoprocts are tiny, colonial organisms. | | | They, along with the Phoronids (worm-like animals) and the Brachiopods (bivalve-like animals sometimes referred to as lampshells) are thus classified based on the presence of a specialized feeding structure called a lophophore, an extension of the body wall into a tentacled structure that surrounds the mouth and is either horseshoe-shaped or circular. |
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http://www.sms.si.edu/irlspec/IntroBryozoa.htm
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| | [No title] |
| | Mollusks Bilateral symmetry Protostome Phylum Mollusca 3 classes (Gastropoda, Bivalvia, Cephalopoda) Gastropods (Stomach footed) e.g. | | | Eggs enter human children’s mouth, develop in the intestines, enter the bloodstream and travel to the lungs. | | | Found in contaminated soil and enters the body through the feet when people walk barefooted. |
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http://teacherweb.com/CT/PlainvilleHighSchool/MrGirard/InvertebratesOutline.doc
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| | Brainstorms: Nelson and Ross: Problems with Characterizing the Protostome-Deuterostome Ancestor |
| | One of the central difficulties is characterizing the common ancestor of the protostomes and deuterostomes. | | | Next, we were supposed to imagine what the adult of this organism would look like. | | | We argue that an unresolved conceptual puzzle has plagued the many attempts to describe this Urbilaterian, or, in Erwin and Davidson’s (2002) terminology, the protostome-deuterostome ancestor (PDA). |
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http://www.iscid.org/boards/ubb-get_topic-f-6-t-000536.html
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| | Lophotrochozoa: Encyclopedia topic |
| | The Lophotrochozoa are one of two major groups of protostome (protostome: more facts about this subject) animals. | | | The name Spiralia has also been used for this extended group, since it includes all animals that develop with spiral cleavage (spiral cleavage: more facts about this subject). | | | The flatworm (flatworm: Parasitic or free-living worms having a flattened body) s and their allies form a clade (clade: A group of biological taxa or species that share features inherited from a common ancestor), called the Platyzoa (Platyzoa: the platyzoa are a group of protostome animals.... |
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http://www.absoluteastronomy.com/reference/lophotrochozoa
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| | [No title] |
| | Mollusks and annelids are among the major variations on the protostome body plan. | | | E Annelids are hermaphroditic but cross-fertilize during sexual reproduction. | | | Page 541-2 in text have diagrams comparing development of the protostomes and deuterostomes as to mesoderm development, egg cleavage and mouth development. |
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http://chesterfield.k12.va.us/~elikins/chap26.html
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| | Evolution Standard 1990 |
| | (1) Coelomate versus acoelomate body plan (2) Protostome versus deuterostome development (3) Radial versus bilateral symmetry B. Explain how each of these pairs of features was important in constructing the phylogenetic tree shown below. | | | EVOLUTION QUESTION 1990: L. Describe the differences between the terms in each of the following pairs. | | | Use specific examples from the tree in your discussion. |
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http://apbio.biosci.uga.edu/exam/Essays/html/standards/1990_evolution.html
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| | Bilateria : Protostome |
| | They are distinguished by how the coelom develops, in particular whether the first body opening to form in larval growth becomes the anus (deuterostomes) or mouth (protostomes). | | | The two divisions of the Bilateria are Deuterostomes (echinoderms, chordates, hemichordates, Chaetognatha and Vetulicolia) and Protostomes (arthropods, annelid worms, molluscs and many more groups). | | | Protostomes have spiral cleavage, while deuterstomes have radial cleavage. |
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http://www.fastload.org/pr/Protostome.html
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| | Palaeos Ecology : Radiations : Cambrian Explosion |
| | Divergence times among the three protostome phyla were not estimated in their analysis. | | | Protostomes apparently diverged from chordates well before echinoderms, which suggests a prolonged radiation of animal phyla.") | | | These studies all conclude that the major animal groups became separated from one another hundreds of millions of years before the Cambrian. |
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http://www.palaeos.com/Ecology/Radiations/CambrianExplosion.html
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| | Animalia |
| | rRNA data supports the idea that the protostomes are further subdivided into two major clades: the Lophotrochozoa which is a concept that has been around for yonks -- verify -- and the Ecdysozoa, moulting animals, first formally recognised by Aguinaldo et al. | | | The protostomes include at least the annelids, arthropods, molluscs and platyhelminthes. | | | However, no body fossils exist to shed light on a common protostome-deuterostome ancestor. |
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http://www.peripatus.gen.nz/Taxa/Animalia.html
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| | Animal Diversity |
| | Figure 32.7 A comparison of early development in protostomes and deuterostomes |
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http://www.wsu.edu/~rlee/biol103/AD.html
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| | BIL 160 - Lecture 14 |
| | This clade includes both familiar and unfamiliar phyla, all of which are protostome coelomates. | | | HERE for your print-friendly copy of the notes. | | | The Lophophorates - linked by the lophophore feeding apparatus |
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http://www.bio.miami.edu/dana/160/160S04_14.html
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| | bio120quiz4.html |
| | Jointed appendages, protostome, three pairs of walking legs: | | | Give phylum and common name for the following groups with these distinguishing characteristics: | | | protostome (list all phyla that fit this description): |
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http://www.utm.edu/staff/nbuschha/bio120quiz4.html
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| | Search Results for protostome - Encyclopædia Britannica |
| | All animals except those in the four phyla mentioned above have bilaterally symmetrical ancestors and contain three body layers (triploblastic) with coalition of tissues into organs. | | | Expand your search on protostome with these databases: | | | The greatest written works in one magnificent collection. |
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http://www.britannica.com/search?query=protostome&submit=Find&source=MWTEXT
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| | Table of Contents |
| | Lab 6b: Annelid and Lesser Protostome Form and Function |
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http://bioweb.uwlax.edu/zoolab/Table_of_Contents/table_of_contents.htm
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