... zsj.24.123 Biogeography and Karyotypes of Freshwater Planarians (Platyhelminthes, Tricladida, Paludicola) in Southern BrazilTani...
NBII National Biological Information Infrastructure
... Jones and Sterrer (Platyhelminthes: Tricladida), a Terrestrial Broadhead Planarian New to North AmericaPeter K. Ducey1,*, Matthew McCormick1, ... edu. Abstract An increasing number of exotic terrestrial ...
... of the collections concerns the triclad flatworms or planarians (Order Tricladida). From this group many species and ... available of marine, freshwater, as well as terrestrial planarians, including 385 t...
... ultrastructural features of the epidermis of the land planarian Bipalium adventitium. J. Morph. 175:171�194. CrossRefDindal, ... Hyman, L. H. 1943. Endemic and exotic land planarians in the United States ...
Nucleotide sequences of 18S ribosomal RNA from 71 species of Platyhelminthes, the flatworms, were analyzed using maximum likelihood, and the resulting phylogenetic trees were compared with previous phylogenetic hypotheses. Analyses including 15 outgroup species belonging to eight other phyla show that Platyhelminthes are monophyletic with the exception of ...
E-print Network
The suborder Tricladida (Platyhelminthes: Turbellaria, Seriata) comprises most well-known species of free-living flatworms. Four infraorders are recognized: (i) the Maricola (marine planarians); (ii) the Cavernicola (a group of primarily cavernicolan planarians); (iii) the Paludicola (freshwater planarians); and (iv) the Terricola (land planarians). The ...
PubMed Central
In the Tricladida (Platyhelminthes), the incidence of different biotypes identified by several ploidy levels is very common. Planarians collected in the State of Rio Grande do Sul were identified using cytogenetics. Different species distributions were observed with respect to Rio Grande do Sul's geomorphology, which could have been caused by their ...
PubMed
... is no introduction to the systematics of the platyhelminths, nor to the platyhelminths in general. To get through many chapters, I ... ...
Platydemus manokwari is a broadly distributed invasive terrestrial flatworm that preys heavily on land snails and has been credited with the demise of numerous threatened island faunas. We examined whether P. manokwari tracks the mucus trails of land snail prey, investigated its ability to determine trail direction, and evaluated prey preference among various land snail species. A plastic ...
NASA Astrophysics Data System (ADS)
Transposable elements are DNA sequences present in all the large phylogenetic groups, both capable of changing position within the genome and constituting a significant part of eukaryotic genomes. The mariner family of transposons is one of the few which occurs in a wide variety of taxonomic groups, including freshwater planarians. Nevertheless, so far only five planarian species have been ...
... Descriptors : (*PLATYHELMINTHS, LIFE CYCLES), (*PARASITIC DISEASES, PLATYHELMINTHS), CLASSIFICATION, PATHOLOGY, THERAPY ...
DTIC Science & Technology
The Pax-6 gene encodes a transcription factor containing both a paired and a homeodomain and is highly conserved among Metazoa. In both vertebrates and invertebrates, Pax-6 is required for eye morphogenesis, development of parts of the central nervous system, and, in some phyla, for the development of olfactory sense organs. Ectopic expression of Pax-6 from insects, mammals, cephalopods, and ...
The potential ecological impact of exotic terrestrial planarians will be determined in part by their sensory abilities and predatory behavior. It has been suggested that these flatworms may only encounter their earthworm prey by chance, hence restricting the breadth of species they will feed upon and the number of microhabitats in which predator-prey interactions occur. We hypothesized that those ...
Freshwater planarians (Platyhelminthes, Turbellaria, and Tricladida) are acoelomate, triploblastic, unsegmented, and bilaterally symmetrical organisms that are mainly known for their ample power to regenerate a complete organism from a small piece of their body. To identify potential pattern-control genes in planarian regeneration, we have isolated two ...
... given in Table III. As with all other platyhelminth mt genomes (Johnston, 2006), all genes code on ... levels, mitogenomics clearly has a bright future in platyhelminth systematics. Molecular identificati...
... and Smales, 2006) shows 40% similarity between the platyhelminth communities of the 2 host species. Although the ... as a determinant of the community structure of platyhelminth parasites of anurans. Ecol...
... 1 Redescription and Designation of a Neotype of Temnocephala talicei Dioni, 1967 (Platyhelminthes: Temnocephalida)Odile Volonter...
... 1645/GE-3152RN Patterns of Occurrence of the Platyhelminth Parasites of the Wild Bullseye Puffer (Sphoeroides annulatus) ... st...
- Platyhelminthes (Flatworms) picture of platyhelminthes Phylum - Annelida (Aquatic Earthworms, Leeches) picture of annelida picture of annelida picture of annelida picture of...
Science.gov Websites
... listing of the taxonomy of turbellarians (formerly class Turbellaria of the phylum Platyhelminthes). In recognition of recent ... ...
... Descriptors : (*PARASITIC DISEASES, *MICE), (*PLATYHELMINTHS, PARASITIC DISEASES), HISTOLOGY, PATHOLOGY, PARASITES, LARVAE ...
ABSTRACT: BACKGROUND: Schmidtea mediterranea (Platyhelminthes, Tricladida, Continenticola) is found in scattered localities on a few islands and in coastal areas of the western Mediterranean. Although S. mediterranea is the object of many regeneration studies, little is known about its evolutionary history. Its present distribution has been proposed to ...
BackgroundAlthough most freshwater planarias are well known photonegative organisms, their diel rhythms have never been quantified. Differences in daily activity rhythms may be particularly important for temperate-climate, freshwater planarias, which tend to overlap considerably in spatial distribution and trophic requirements.MethodsActivity of stress-free, individually tested young adults of ...
The methods used at the New Brunswick Laboratory for the quantitative ion exchange separation of plutonium from impurities prior to plutonium assay are described. Other ion exchange separation procedures for impurity determination and for isotopic abundan...
National Technical Information Service (NTIS)
... Growing and harvesting switchgrass (Panicum virgatum) as a biomass fuel would create another habitat for grassland birds. ... on bird abundances of converting rowcrop fields to biomass production. Abundan...
27 Mar 2002 ... Este proceso se logr? congelando mezclas de mol?culas (como alcohol de madera y amonia) los que abundan en las n?bulas interestelares, ...
NASA Website
The interactions of hemoglobin containing liposomes and of liposomes composed of polymerizable phospholipids with blood cells and proteins have been examined. All types of liposomes studied bound a variety of serum proteins with IgG being the most abundan...
... Effects of landscape composition and wetland fragmentation on frog and toad abundance and species richness in Iowa ... Effects of landscape composition and wetland fragmentation on frog and toad abundan...
The U.S. Fish and Wildlife Service first identified billfishes (blue marlin, Makaira nigricans; white marlin, Tetrapturus albidus; sailfish, Istiophorous platypterus; swordfish, Xiphias gladius; and longbill spearfish, Tetrapturus pfluegeri) as an abundan...
Particulate nitrogen (PN), particulate carbon (PC), chlorophyll a, and cell numbers were measured in nitrate and ammonium limited chemostat cultures of Scenedesmus abundans. With increasing growth rate, PN:PC increased but PN:cell did not vary. Variations in PN:PC are interpreted as reflections of relative rates of nitrogen and carbon assimilation. Net particulate carbon ...
Energy Citations Database
... Q Predation of mosquitoes by the planarian Du- fed 20 fourth instar Aedes aei,3pa fLinn.) per ..esia dorotocephala (Woodworth) (Tricladida ...
... brain in this taxon. The brain of parasitic platyhelminths typically consists of a bilobed ganglionic mass connected ... K S. Gustafsson. 1996. Functional morphology of the platyhelminth nervous system. P...
... life history traits in parasitic and free-living platyhelminths: A new perspective. Oecologia 115::370�378. CrossRef, ... AS A DETERMINANT OF THE COMMUNITY STRUCTURE OF PLATYHELMINTH PARASITES OF ANURANS....
that empties at the male gen- cirrus penis ital pore. Often an intromittent organ is associated with this pore; this is referred to as a penis if it is protrusible, and as a cirrus if it is protrusible and eversible. The female the ovovitellarium and a sperm duct leads anteriorly to a protrusible penis. The digestive system is blind
... are the most primitive not only among the platyhelminth classes but among all the bilateral (triploblastic) animal ... methods have been applied to phylogenetic analyses of platyhelminth groups. A large s...
... posit that the original hosts of all parasitic platyhelminths were vertebrates (see also Cribb et al., 2001, ... On the whole, life-cycle truncation among parasitic platyhelminths appears more frequently ...
... provided some resolution in a broad range of platyhelminth taxa, including cestodes, digeneans, and turbellarians (Baverstock et ... and Platzer et al., 1998). Previous studies of platyhelminth taxa have ...
... 802. Prudhoe, S. and R. A. Bray. 1982. Platyhelminth parasites of the Amphibia. Oxford University Press, Oxford, ... AS A DETERMINANT OF THE COMMUNITY STRUCTURE OF PLATYHELMINTH PARASITES OF ANURANS. Ecol...
... techniques. For light microscope study and taxonomic determination, platyhelminths were stained and mounted in Canada balsam, and ... Brooks et al. (2006) in their comparisons of platyhelminth communities...
... Box 297, Concepción, Chile Udonella australis is a platyhelminth that lives on the surface of the ectoparasite ... Accepted: September 26, 2006 Species of Udonella are platyhelminths that are commonly f...
... were removed and washed in 0.65% saline. Platyhelminths were relaxed with hot tap water, fixed in ... as a determinant of the community structure of platyhelminth parasites of anurans. Ecology 87:S76�S85....
... from this site and habitat, while the undescribed platyhelminth (of the digenean family Derogenidae) probably represents another ... ...
Abstract: Check list of Antarctic and Subantarctic Digenea (subclass within the Platyhelminthes consisting of parasitic flatworms). ...
... In addition to those above, organisms used are Axolotl (1), Dictyostelium (1), sea urchin (1), Platyhelminthes (1), ... ...
Antarctic Deep Sea (ANDEEP): Isopods occurence (Isopoda, Crustacea) ... Digenea (subclass within the Platyhelminthes consisting of parasitic flatworms). ...
Explaining diversity: evolution 8 Sept Origins of animals Platyhelminthes � flukes, planarian, cestode 10
TRICLADIDA HEMIPTERA Black Fly Midge Fly Tabanus Cranefly Snails Flatworms Water Strider Water Boatman
The effects of Dugesia dorotocephala (Woodworth), a proven predator of aquatic Diptera, on 17 species of nontarget aquatic organisms were determined under controlled laboratory conditions. Only 3 of the nontarget organisms, Aeolosoma sp., Cyclops sp. and ...
�C (Van Voor- hies, 1996). Similarly, planarians reared at 22�C had cells that were about 80 of growth and reproduction in freshwater planarians (Turbellaria; Tricladida). I. A cellular description
BackgroundThe thioredoxin and/or glutathione pathways occur in all organisms. They provide electrons for deoxyribonucleotide synthesis, function as antioxidant defenses, in detoxification, Fe/S biogenesis and participate in a variety of cellular processes. In contrast to their mammalian hosts, platyhelminth (flatworm) parasites studied so far, lack conventional thioredoxin and ...
The experimental data are evaluated and values for the spontaneous fission half-life of exp 238 U and the total half-lives for exp 232 U, exp 233 U, exp 234 U, exp 235 U, exp 236 U, and exp 238 U are recommended. Also the variation of the isotopic abundan...
The Snake river in Grand Teton National Park, Wyoming, is managed cooperatively by the National Park Service and the Wyoming Game and Fish Department (WGFD). Personnel have periodically sampled fish. These fish collections have been used to obtain abundan...
The dinoflagellate cyst records in sediments from New Bedford Harbor and Apponagansett Bay demonstrate sensitivity to environmental change caused by human activity in the watersheds over the last 500 years. Changes in the species richness, as well as absolute and relative abundan...
EPA Science Inventory
Creeping bentgrass (Agrostis stolonifera L.; CBG), Kentucky bluegrass (Poa pratensis L.; KBG), and fine fescue species (Festuca spp.; FF) are commonly used as turf on golf courses. All have been identified as invasive species by governmental or non-governmental groups. We hypothesized that abundan...
Technology Transfer Automated Retrieval System (TEKTRAN)
(Discover Life). The list includes algae, arachnids (spiders), bacteria, crustaceans, fungi, insects, plants, platyhelminthes (e.g. worms), protists (e.g. slime moulds), and...
... m at 2 Tampa Bay locations: 20 at Apollo Beach on 13 July 2008 and 10 at Saint Petersburg on ... ...
We determined 9.7, 5.2, and 6.8 kb, respectively, of the mitochondrial genomes of the acoel Paratomella rubra, the nemertodermatid Nemertoderma westbladi and the free-living rhabditophoran platyhelminth Microstomum lineare. The identified gene arrangements are unique among metazoans, including each other, sharing no more than one or two single gene boundaries with a few ...
The spatial and temporal distribution of the larval fish Pleuragramma antarcticum in ... Antarctic Deep Sea (ANDEEP): Isopods occurence (Isopoda, Crustacea) ... (subclass within the Platyhelminthes consisting of parasitic flatworms). ...
... Digenea (subclass within the Platyhelminthes consisting of parasitic flatworms). 54. Checklist of the antarctic and subantarctic Isopoda by Angelika Brandt ... devoted to amphipod crustaceans, is under development at the Royal ...
... tapeworms) and (flukes), which are entirely parasitic; and [(planarians)], which are almost exclusively a free-living group (). ... Microturbellarians consume bacteria, algae, protozoans, and invertebra...
... at the microevolutionary scale. Acknowledgments We thank P. Torricelli, B. Dezfuli, A. Crivelli, and F. Bonhomme for ... ...
.g. in dandelions (Taraxacum) (MENKEN et al. 1995), but it is very rare in animals. In planarian Schmidtea polychroa
... radially wrinkled and dorsally subterminal. Images obtained by scanning electron microscopy confirmed the characters that differentiate the new species ... ...
... Etymology This species is named in honor and loving memory of Isabelle Berenguel. Remarks Euryhaliotrematoides berenguelae most ... ...
There are three main groups of helminths (derived from the Greek word for worms) that are human parasites: Flatworms (platyhelminths) - these include the trematodes (flukes) and...
... Crangonyctidae), Bactrurus and Crangonyx forbesi. The distribution of planarians in Missouri caves is poorly known. Species such ... evaginata suggest that the known distribution of cave planarians in Mis...
and Comparative Anatomy Jan. 28-Feb. 2 4. Cnidarians, Platyhelminthes, and Annelids Feb. 4-9 5. Mollusks
Bibliography and checklist of the Amphipoda (Crustacea) of the Southern Ocean ... (subclass within the Platyhelminthes consisting of parasitic flatworms). ... Checklist of the antarctic and subantarctic Isopoda by Angelika Brandt ...
of phylogenetic resolution among several species of fresh-water planarians (Platyhelminthes). Canadian Journal
CUN (leucine) for threonine (in yeasts), AAA (lysine) for asparagine (in platyhelminths and echinoderms), UAA (stop) for tyrosine (in planaria), ...
AAA (lysine) for asparagine (in platyhelminths and echinoderms), UAA (stop) for tyrosine (in planaria), and AGR (arginine) for serine (in several animal ...
Acoel and platyhelminth worms are particularly attractive invertebrate models for stem-cell research because their bodies are continually renewed from large pools of somatic stem cells. Several recent studies, including one in BMC Developmental Biology, are beginning to reveal the cellular dynamics and molecular basis of stem-cell function in these animals.See research article ...
The observable abundances of the ultraheavy cosmic rays in the charge range 24< or =Z< or =59 have been calculated using different source abundances hypotheses. These include the standard solar-system abundances, r-process--only abundanes, and these two sets modified by the first ionization potential of the elements to test for preferential acceleration effects. The ...
... cylindrical sphincter in the distal portion of the vagina, and a seminal vesicle that opens into the ... extratesticular fields. Two sphincters in distal portion of vagina, symmetrical to slightly asymmet...
... molecules that associate with proteins to form the ribosome (see Lewin [1997] for general description). Conformation of ... association of RNA and protein that forms the ribosome, single-stranded RNA inte...
... gonopore and organs, and the measurements of the pharynx are expressed in percentages of the total body ... od: oviduct; ov: ovary; pc: prepharyngeal cavity; pg: pharynx glands; ph: pharynx; pl: pharynx l...
Contents: Classification of internal parasites of man and animals in Hawaii(Protozoa, Nemathelminthes (Roundworms), Platyhelminthes (Tapeworms and Flukes)); Life cycles of parasites; Routes of infection of internal parasites; Mollusks of parasitological i...
... Sagittal reconstruction. b, bursa copulatrix; br, brain; dt, ductus transversus; e, eye; ga, genital atrium; i, intestine; ... the intestine. The oviduct opens into a short ductus transversus. The ductus ...
... body; extends from just posterior to level of pharynx to slightly beyond posterior end of body. Ventral ... each transverse septum. Oral sucker absent, prepharynx short, pharynx relatively large and oval....
,000 species of flatworms. Preserved specimens � sheep liver fluke, sheep tapeworm Phylum Rotifera � rotifers Platyhelminthes � flatworms This phylum contains planarians, tapeworms, and flukes. Flatworms get their name from
... and intestine; B) general view, male and female reproductive systems; C) detail of the posterior region of the body showing male and female reproductive systems; D) detail of the posterior region of the ....
and thioredoxin systems in platyhelminthsa Echinococcus granulosus Echinococcus multilocularis Schistosoma mansoni. granulosus or Echinococcus multilocularis. TGR has also been found to be expressed in F. hepatica (C. Carmona reductases from Echinococcus granulosus. Alignments of the amino acid sequences predicted for E. granulosus
... platyhelminth species. MATERIALS AND METHODS Production of hybridoma Hybridomas producing anti-mammalian IF mAbs were selected from ... ...
... Digenea (subclass within the Platyhelminthes consisting of parasitic flatworms). 21. Checklist of the antarctic and subantarctic Isopoda by Angelika Brandt ... Biodiversity of Antarctic Amphipod Crustaceans (BIANZO) [SCAR-MarBIN] ...
... atrial system (holotype). (B) Reconstruction of the genital organs (holo-type). b, bursa; bs, bursal stalk; cga, common genital ... filled with loose parenchyma. As such the copulatory organ is clearly of...
... GAG GGA AAC TTC GG-3�) (Littlewood and Johnston, 1995). Two 100-µl PCR reactions ... (Perkin-Elmer, Foster City, California), 57.5 µl deionized water, and ... ...
... Farris (1969)) with the unit rescaled consistency index (rci) (Farris, 1989) as measure of homoplasy. Alternatively, the ... 0,32). Three rounds of successive weighting using rci as a measure of homoplasy...
Platyhelminthes � flatworms This phylum contains planarians, tapeworms, and flukes. Flatworms get their name from- living and parasitic forms, range in size from microscopic (in the case of some planarians) to over 20 m
... unique within Protoplanellinae in lacking rhabdites, having a pharynx rosulatus in the frontal half of the body, ... gonopore and organs, and the measurements of the pharynx are expressed in percentages o...
... A. 1978. Presencia de Temnocephala (Temnocephalida, Platyhelminthes) en hem�pteros acu�ticos. Ciencia e Investigaci�n 34:95�99. Ostrowski ... ...
slides of the adult flukes (Clonorchis sinensis, the Chinese liver fluke) to see the organ systems. Platyhelminthes consists of several taxa: the free-living `Turbellaria' and the parasitic Trematoda (flukes the parasitic flatworms, most of which are flukes or tapeworms. Most parasitic flatworms are endoparasites
, both cnidarian and Acoelomorph hosts displayed high speciWcity for genetically distinctive Symbiodinium 1994), as well as Acoelomorpha, a recently designated phylum (Baguna and Riutort 2004). Cnidarian to the well-studied cnidarians, symbiotic platyhelminth worms, and particularly acoelomorphs are the most
Acoel flatworms are small marine worms traditionally considered to belong to the phylum Platyhelminthes. However, molecular phylogenetic analyses suggest that acoels are not members of Platyhelminthes, but are rather extant members of the earliest diverging Bilateria. This result has been called into question, under suspicions of a long branch attraction ...
:64-82. BALL, l.R. & REYNOLDSON, T.B. 1981.British Planarians (Platyhelminthes: Tricladia). Cambridge Univ
Austrodiplostomum compactum (Platyhelminthes, Digenea) eye flukes of several species of fishes. The presence of this parasite, in extreme cases, can cause swelling of the eyelids, displacement of the retina, opacity of the crystalline lens and blindness or even death. The present study it registers new occurrences of this metacercariae infecting the eyes of four new hosts of ...
By preserving specimens of the monogenean (platyhelminth) parasite Entobdella soleae at intervals during locomotion and processing these parasites for transmission and scanning electron microscopy, evidence was found to suggest that adhesion of the anterior pads to the skin of the host, the sole Solea solea, is brought about by interaction between the two kinds of glandular ...
Platyhelminth parasites are a major health problem in developing countries. In contrast to their mammalian hosts, platyhelminth thiol-disulfide redox homeostasis relies on linked thioredoxin-glutathione systems, which are fully dependent on thioredoxin-glutathione reductase (TGR), a promising drug target. TGR is a homodimeric enzyme comprising a ...
The length of the telomeric DNA in nine species of planarians inhabiting Lake Baikal and one Siberian species from Baikal rivers was determined using Southern hybridization. According to preliminary estimations, it varied in the range of 25-30 kb (Rimacephalus arecepta, Rimacephalus pulvinar, Sorocelis hepatizon, Sorocelis nigrofasciata, Protocotylus sp., Baikalobia guttata, Bdellocephala ...
We describe lesions associated with a seemingly intense infection of trypanorhynch plerocerci (Platyhelminthes: Cestoda: Trypanorhyncha) in the gastric wall of a female cownose ray, Rhinoptera bonasus (Myliobatiformes: Rhinopteridae) captured in the northern Gulf of Mexico. Grossly, the multitude of encapsulated, encysted plerocerci imparted a bumpy and cobbled appearance to ...
Bilateria are currently subdivided into three superclades: Deuterostomia, Ecdysozoa, and Lophotrochozoa. Within this new taxonomic frame, acoelomate Platyhelminthes, for a long time held to be basal bilaterians, are now considered spiralian lophotrochozoans. However, recent 18S rDNA [small subunit (SSU)] analyses have shown Platyhelminthes to be ...
Twenty-two of 26 white-throated sparrows, Zonotrichia albicollis, from Algonquin Park, Ontario, Canada, hosted 1 or 2 species of platyhelminths. One species of cestode and 3 of digeneans were collected. Anonchotaenia quiscali inhabited 50% of the sparrows. This is the third report of A. quiscali; Z. albicollis is a new host. Brachylecithum nanum inhabited 43%, Zonorchis alveyi ...
Analysis of 18S rDNA sequences isolated from Cyathura carinata (Crustacea: Isopoda) indicate that two different species of the Digenea (Platyhelminthes: Trematoda) parasitize this isopod species for which parasitic associations have previously been unknown. Phylogenetic analysis, based on the largest data set of digenetic 18S rDNA sequences published to date, also suggests ...
Bryoplana xerophila, a new genus and species of limnoterrestrial protoplanelline platyhelminth, was found in moss and soil covering a concrete wall in northern Alabama, USA. Bryoplana xerophila is the first taxon of limnoterrestrial Protoplanellinae recorded from North America and is one of the few rhabdocoels known from dry habitats. It is unique within Protoplanellinae in ...
� They are flatworms (Phylum Platyhelminthes) known as digenetic trematodes or flukes. � There are about 100 species are called "blood flukes." � Their complex life cycle is dependent on snails. � These worms infect about 200. Spined egg causing granuloma This histological section of a liver shows an individual granuloma response
The epidermal eyespots of the acoel Otocelis rubropunctata would appear to consist of a single cell type provided with pigment granules and cilia. Very numerous dictyosomes characterize the cytoplasm of the cells. The cilia possess the 9X2 + 2 pattern of microtubules and the typical rootlets of acoels. Microvilli are interspersed among the cilia. The basal surface of the cells seems to present ...
Since first described, acoels were considered members of the flatworms (Platyhelminthes). However, no clear synapomorphies among the three large flatworm taxa - the Catenulida, the Acoelomorpha and the Rhabditophora - have been characterized to date. Molecular phylogenies, on the other hand, commonly positioned acoels separate from other flatworms. Accordingly, our own ...
-renewing and can thus be called stem cells. For example, in the planarian flat worm, another lophotrochozoan, germ. Mollusca (Ilyanassa) Annelida (polychaete, leech) Brachipoda Phoronida Nemertea Platyhelminthes (planarians., 2009). The two piwi homologs in the planarian flatworm Schmidtea mediterranea, Smedwi-2 and Smedwi-3
The Taxonomic Atlas of the Santa Maria Basin and Western Santa Barbara Channel is an extension of the benthic reconnaissance and monitoring programs conducted by the MMS since 1983. The organisms that were collected as part of those programs provide most ...
, AND B. J. JALALI. 2007. Gyrodactylus derjavinoides sp. nov. (Monogenea, Platyhelminthes) on Salmo trutta Salmo trutta L. in NW Russia. Systematic Parasitology 69: 123�135. ------, AND J. LUMME. 2003 [Zietara et al., 2008]; host Salmo trutta--EF446731-2 River Satulinoja, Russia [Zietara et al., 2008]) N
Platyhelminthes - flatworms Phylum Mollusca Conus spp. - cone shells Cypraea caputserpentis - snakehead cowry: under rocks and in crevices PHYLUM MOLLUSCA - snails, nudibranchs, clams, octopus & squid Conus spp. - cone shells Description: cone-shaped shells in a variety of colors and forms Size: up to 15 cm length
1 Proposal for the Sequencing of a New Target Genome: White Paper for a Planarian Genome Project. Freshwater planarians are best known for their ability to regenerate complete animals from tiny fragments planarian. Planarians are free-living representatives of the Platyhelminthes, an understudied yet
a particularly striking sequence similarity with basal bilaterians, in particular acoel flatworms (Cook et al Evol 306B:45�58. Cook CE, Jime�nez E, Akam M, Salo� E. 2004. The Hox gene complement of acoel flatworms. The nemertodermatid flatworms are basal bilaterians not mem- bers of Platyhelminthes. Zool Scr 31:201�215. Lemons D
... specimen (freehand drawing). e, eye; eg, egg; ph, pharynx. c. Sagittal reconstruction. ag, adhesive glands; b, bursa ... 1/4 of the body length) barrel-like pharynx. Small oesophageal glands opening in tr...
in the metazoan cathepsin L cluster along with SmCL2 and cathepsins L from the liver fluke, Fasciola sppSmCL3, a Gastrodermal Cysteine Protease of the Human Blood Fluke Schistosoma mansoni Jan Dvora�k1: Blood flukes of the genus Schistosoma are platyhelminth parasites that infect 200 million people
. thecatus, which together are the sister taxon of Nematoda; however, long bran- ches and/or base composition Accession No. Ascaris suum Nematoda X54253 Necator americanus Nematoda AJ417719 Caenorhabditis elegans Nematoda X54252 Trichinella spiralis Nematoda AF293969 Hymenolepis diminuta Platyhelminthes AF314223
Temnocephala brevicornis Monticelli 1889, ectosymbiont of Hydromedusa tectifera Cope 1869, is reported for the first time for Argentina. Numerous temnocephalans from Arroyo Villoldo in the locality of Magdalena, Buenos Aires, Argentina were stained in toto to be studied. This commensal species in turtles was originally cited in association with Hydromedusa maximiliani (Mikan) and Hydraspis ...
showing `bursa'; G-K: Lateral view of male tail (different focal plane); L-O: Ventral view of spicule and tail terminus. Occasional asymmetry observed in P3 and P4 papillal arrangement. `Bursa' smoothly-old cul- tures of 727B. Holotype female (slide number Bursa- Vol. 10(6), 2008 931 #12;N. Kanzaki et al
(combjellyfish) Platyhelminthes(flatworms) Nemertea(ribbonworms) Annelida(leech) Brachipoda(tentaculates) Mollusca(snail) Nematoda, Nematoda, Arthropoda, Echinoderms, Chordata Pax-2/5/8 Wariai Q50 Lim-class Q50 Antp-class Q50 paired
A new species of polyclad flatworm, Imogine necopinata Sluys, sp. nov., is described from a brackish habitat in The Netherlands. Taxonomic affinities with Asian species and the ecology of the animals suggest that the species is an introduced, exotic component of the Dutch fauna. The new species belongs to a group of worms with species that are known to predate on oysters.
Dileptus, a common holotrich, may function as a predator upon a variety of metazoan animals representing such varied phyla as Cnidaria, Platyhelminthes, Aschelminthes, Annelida, and Mollusca. Very young animals and wounded animals are especially vulnerable. Effective predation is directly related to the concentration of Dileptus to which the victim is exposed. PMID:17811216
BackgroundNuclear receptors (NRs) are important transcriptional modulators in metazoans which regulate transcription through binding to the promoter region of their target gene by the DNA binding domain (DBD) and activation or repression of mRNA synthesis through co-regulators bound to the ligand binding domain (LBD). NRs typically have a single DBD with a LBD.ResultsThree nuclear receptors named ...
Hydrocarbons isolated from hydrothermal anhydrite, chalocopyrite, and sphalerite-enriched samples from the mid-Atlantic Ridge exhibit a high degree of thermal maturation, compared to a Fe-oxide-enriched sample, as evidenced by the high abundane of low molecular weith n-alkanes ranging from C14 to C25 with a broad distribution of naphthenes. These trace hydrothermally-derived ...
S.S.s.R. 109, 81-3-15(1956)) presented evidence indicating the presencc of Ar/sup 38/ in potassium micas and feldspars. Their data indicate that the Ar/ sup 38/K ratio is constant for potassium minerals of a given age and that this ratio increases regalarly with the age of the sample. The observed data may be explained by assuming that K/sup 38/ occurs in nature with an ...
Dependency of static stability of the cloud layeres on the abundance of condensable elements for the Jovian atmospheres is considered by calculating moist adiabatic lapse rate. Optimal minimization method of Gibbs free energy is utilized to obtain equilibrium compositions for given temperature, pressure, and basic elements. An advantage of this method is that no chemical reaction formula has to be ...
This review deals with the problems faced by those monogenean (platyhelminth) parasites that attach themselves to fish skin. The structure of the skin and the ways in which the posterior hook-bearing haptor achieves virtually permanent attachment to the skin are considered. Small marginal hooklets are specialized for attachment to superficial host epidermal cells, finding ...
The monogenean (platyhelminth) skin parasite Entobdella soleae from the common sole (Solea solea) lays tetrahedral eggs. One of the 4 corners of the tetrahedron is a detachable operculum which is bonded to the rest of the egg-shell by cement. Most of this cement layer, beginning at the inner surface of the shell and running through almost to the outer surface (a distance of ...
The origin of the bilaterian metazoans from radial ancestors is one of the biggest puzzles in animal evolution. A way to solve it is to identify the nature and main features of the last common ancestor of the bilaterians (LCB). Recent progress in molecular phylogeny has shown that many platyhelminth flatworms, regarded for a long time as basal bilaterians, now belong to the ...
The free-living Platyhelminthes of the Amazon basin are poorly known. Presently only four turbellarian species have been mentioned from the Amazon river, a fact that confirms the lack of information on this kind of faunas in this huge basin. Three new species of Gieysztoria from Amazonian floodplain in Peru are described herein: G. chiqchi n. sp., G. kasasapa n. sp. and G. ...
Using ''long-PCR'' we have amplified in overlapping fragments the complete mitochondrial genome of the tapeworm Hymenolepis diminuta (Platyhelminthes: Cestoda) and determined its 13,900 nucleotide sequence. The gene content is the same as that typically found for animal mitochondrial DNA (mtDNA) except that atp8 appears to be lacking, a ...
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Studies of adaptive radiations require robust phylogenies, estimates of species numbers for monophyletic groups within clades, assessments of the adaptive value of putative key innovations, and estimates of the frequency of speciation modes. Four criteria are necessary to identify an adaptive radiation within the parasitic platyhelminths: (1) a group contains significantly ...
Shared molecular genetic characteristics other than DNA and protein sequences can provide excellent sources of phylogenetic information, particularly if they are complex and rare and are consequently unlikely to have arisen by chance convergence. We have used two such characters, arising from changes in mitochondrial genetic code, to define a clade within the ...
SYNOPSIS. TWO fundamentally opposed theories have been proposed to account for the origin of the body plan of the flatworms. Each theory relates to a different concept of the evolution of the early metazoans. For the defenders of the classical planuloid/acoeloi'd theory, the simple organization of the flatworms is reminiscent of an hypothetical acoelomate worm-like ancestor of all bilaterians. ...
This study is devoted to ultrastructural and immunosytochemical investigation of the nervous system in parasitic and free-living platyhelminthes to learn if glial cells exist in the nervous system of flatworms. We described the ultrastructure of different types of glial cells and the peculiarities of myelinization of gigantic axons; immunoreactivity to the S100b protein is ...
The authors are developing bioassays which use planarians (free-living platyhelminthes) for the rapid determination of various types of toxicity, including acute mortality, tumorigenicity, and short-term neurobehavioral responses. Their motivation for using these animals is due to their importance as components of the aquatic ecology of unpolluted streams their sensitivity to ...
We describe "universal" DNA primers for polymerase chain reaction (PCR) amplification of a 710-bp fragment of the mitochondrial cytochrome c oxidase subunit I gene (COI) from 11 invertebrate phyla: Echinodermata, Mollusca, Annelida, Pogonophora, Arthropoda, Nemertinea, Echiura, Sipuncula, Platyhelminthes, Tardigrada, and Coelenterata, as well as the putative phylum ...
Background:Thyroid hormone receptors (TRs) function as molecular switches in response to thyroid hormone to regulate gene transcription. TRs were previously believed to be present only in chordates.Results:We isolated two TR genes from the Schistosoma mansoni and identified TR orthologues from other invertebrates: the platyhelminths, S. japonium and Schmidtea mediterranea, the ...
Tapeworms (Cestoda, Platyhelminthes) are a highly diversified group of parasites that can have significant veterinary importance as well as medical impact as disease agents of human alveococcosis, hydatidosis, taeniosis/cysticercosis/neurocysticercosis, hymenolepidosis or diphyllobothriasis. Because of their great diversity, there has been keen interest in their phylogenetic ...
Relationships between the three classes of Neodermata (parasitic Platyhelminthes) are much debated and restrict our understanding of the evolution of parasitism and contingent adaptations. The historic view of a sister relationship between Cestoda and Monogenea (Cercomeromorphae; larvae bearing posterior hooks) has been dismissed and the weight of evidence against monogenean ...
Baikal planaria from genus Bdellocephala were typified using rDNA locus coding 5'--end domain of 18S ribosome RNA. Five colour forms of 24 possible variants that differ in diapason 0-1.3% of genotype were determined by comparative analysis of nucleotide sequences. The authors use back colour--one of the most variable and typical character in the given group--to collect material for investigation. ...
High densities of habitat modifiers can dramatically alter the structure of ecosystems. Whereas spawning sockeye salmon ( Oncorhynchus nerka) dig nests that cover over 2 m(2) and are at least 20 cm deep, and can spawn at high densities, relatively little attention has been devoted to investigating the impacts of this disturbance. We hypothesized that this temporally and spatially predictable ...
