東京大学 大学院理学系研究科 大学院理学系研究科 地球惑星科学専攻 Department of Earth and Planetary Science
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Vent Fauna in the Mariana Trough 25 Shigeaki Kojima and Hiromi Watanabe
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Springer - Publisher Connector Vent Fauna in the Mariana Trough 25 Shigeaki Kojima and Hiromi Watanabe Abstract The Mariana Trough is a back-arc basin in the Northwestern Pacific. To date, active hydrothermal vent fields associated with the back-arc spreading center have been reported from the central to the southernmost region of the basin. In spite of a large variation of water depth, no clear segregation of vent faunas has been recognized among vent fields in the Mariana Trough and a large snail Alviniconcha hessleri dominates chemosynthesis- based communities in most fields. Although the Mariana Trough approaches the Mariana Arc at both northern and southern ends, the fauna at back-arc vents within the trough appears to differ from arc vents. In addition, a distinct chemosynthesis-based community was recently discovered in a methane seep site on the landward slope of the Mariana Trench. On the other hand, some hydrothermal vent fields in the Okinawa Trough backarc basin and the Izu-Ogasawara Arc share some faunal groups with the Mariana Trough. The Mariana Trough is a very interesting area from the zoogeographical point of view. Keywords Alvinoconcha hessleri Chemosynthetic-based communities Hydrothermal vent Mariana Arc Mariana Trough 25.1 Introduction The first hydrothermal vent field discovered in the Mariana Trough was the Alice Springs, in the Central Mariana Trough The Mariana Trough is a back-arc basin in the Northwestern (18 130 N, 144 430 E: 3,600 m depth) in 1987 (Craig et al. -
In Sagami Bay and Hyiarothermalism at the Minami-Ensei Knoll(MEK)
Benthos Research Vol.57,No.1:21-30(2002) BENTHOS RESEARCH The Japanese Association of Benthology Estimated Population Densities of Megafauna in Two Chemosynthesis based Communities:a Cold Seep in Sagami Bay and a Hydrothermal Vent in the Okinawa Trough Katsunori Fujikura,Jun Hashimoto and Takashi Okutani Japan Marine Science and Technology Center,2-15Natsushima-cho,Yokosuka, Kanagawa237-0061,Japan Abstract:This study investigates the population density characteristics of the megafauna at two previously described chemosynthesis-based communities associated with cold seepage at the Off Hatsushima Island site (OHI)in SagamiBay and hyiarothermalismat the Minami-EnseiKnoll(MEK)in the OkinawaTrough. Quantitativesampling was conducted using a submersible,ROVand Deep Tow Camera array near each com munity.Atotal of26and27megafaunal species were recorded at OHIand MEK,respectively.The dominant organismwith respect to populationdensity was the provannidsnail Provanna glabra at OHI.Thisspecies alsooccurred at MEK,butit hada lowerdensity than at OHI.Instead,Cantraineajamsteci was the dominant gastropodspecies at MEK.Thecommunity at MEKwas dominated with respect to populationdensity by the symbiont-containingmussel Bathymodiolus japonicus,but this specieswas not so commonat OHI.Themean populationdensities of almostall megafaunalspecies,except for a few conspicuouslypredominant species at OHIand MEK,aresimilar to thosefor the dominantspecies in otherdeep-sea photosynthesis-based com munities.Bothsites were characterizedby large populationsof only a few -
Phylogeny of the Caenogastropoda (Mollusca), Based on Comparative Morphologryegister Login
Phylogeny of the Caenogastropoda (Mollusca), based on comparative morphologRyegister Login CURRENT ARCHIVES ANNOUNCEMENTS ABOUT Search VOL 42 NO 4 HOME ARCHIVES (2011) Original Article Phylogeny of the Caenogastropoda (Mollusca), based on comparative morphology Luiz Ricardo L. Simone Museu de Zoologia Universidade de São Paulo DOI: https://doi.org/10.11606/issn.2176-7793.v42i4p161-323 ABSTRACT The systematics, classification and phylogeny of the Caenogastropoda are revised based on an analysis of the morphology of representatives of all branches. The basis of this work is the detailed examination of the morphology of 305 species, most of which are reported on in detail elsewhere. Representatives of most caenogastropod families were included (comprising 270 species), and 35 outgroup taxa. A phylogenetic analysis based upon 676 morphological characters, with 2291 states (1915 of which are apomorphic states), is presented. The characters comprise every organ system and many are discussed in detail. The polarization is based on a pool of non-caenogastropods, comprising 27 representatives of Heterobranchia, Neritimorpha, Vetigastropoda, Cocculiniformia and Patellogastropoda. Additionally, eight representatives of other classes are also included. The root is based on the representative of Polyplacophora. A few characters were included in order to organize the outgroups, to find the position of Caenogastropoda among them, and to find the synapomorphies of Caenogastropoda. A strict consensus cladogram of the 48 most parsimonious trees (Fig. 20; length of 3036, CI = 51 and RI = 94) is presented, a synopsis of which is: ((((((Cyclophoroidea2 (Ampullarioidea5 (Viviparoidea15 (Cerithioidea19 (Rissooidea41 (Stromboidea47 (Calyptraeoidea67 (Naticoidea97 (Cypraeoidea118 (Tonnoidea149 (Conoidea179 (Cancellarioidea222 – Muricoidea212)))))))))))) HeterobranchiaV) NeritimorphaU) VetigastropodaL) CocculiniformiaJ) Patellogastropoda) (superscripts indicating the nodes at Fig. -
Comparative Analysis of the Complete Mitochondrial Genomes in Two
www.nature.com/scientificreports OPEN Comparative analysis of the complete mitochondrial genomes in two limpets from Lottiidae (Gastropoda: Patellogastropoda): rare irregular gene rearrangement within Gastropoda Jian‑tong Feng1, Ya‑hong Guo1, Cheng‑rui Yan1, Ying‑ying Ye1,2*, Ji‑ji Li1, Bao‑ying Guo1,2 & Zhen‑ming Lü1,2 To improve the systematics and taxonomy of Patellogastropoda within the evolution of gastropods, we determined the complete mitochondrial genome sequences of Lottia goshimai and Nipponacmea fuscoviridis in the family Lottiidae, which presented sizes of 18,192 bp and 18,720 bp, respectively. In addition to 37 common genes among metazoa, we observed duplication of the trnM gene in L. goshimai and the trnM and trnW genes in N. fuscoviridis. The highest A + T contents of the two species were found within protein‑coding genes (59.95% and 54.55%), followed by rRNAs (56.50% and 52.44%) and tRNAs (56.42% and 52.41%). trnS1 and trnS2 could not form the canonical cloverleaf secondary structure due to the lack of a dihydrouracil arm in both species. The gene arrangements in all Patellogastropoda compared with those of ancestral gastropods showed diferent levels of gene rearrangement, including the shufing, translocation and inversion of single genes or gene fragments. This kind of irregular rearrangement is particularly obvious in the Lottiidae family. The results of phylogenetic and gene rearrangement analyses showed that L. goshimai and Lottia digitalis clustered into one group, which in turn clustered with N. fuscoviridis in Patellogastropoda. This study demonstrates the signifcance of complete mitogenomes for phylogenetic analysis and enhances our understanding of the evolution of Patellogastropoda. -
ABSTRACTS Deep-Sea Biology Symposium 2018 Updated: 18-Sep-2018 • Symposium Page
ABSTRACTS Deep-Sea Biology Symposium 2018 Updated: 18-Sep-2018 • Symposium Page NOTE: These abstracts are should not be cited in bibliographies. SESSIONS • Advances in taxonomy and phylogeny • James J. Childress • Autecology • Mining impacts • Biodiversity and ecosystem • Natural and anthropogenic functioning disturbance • Chemosynthetic ecosystems • Pelagic systems • Connectivity and biogeography • Seamounts and canyons • Corals • Technology and observing systems • Deep-ocean stewardship • Trophic ecology • Deep-sea 'omics solely on metabarcoding approaches, where genetic diversity cannot Advances in taxonomy and always be linked to an individual and/or species. phylogenetics - TALKS TALK - Advances in taxonomy and phylogenetics - ABSTRACT 263 TUESDAY Midday • 13:30 • San Carlos Room TALK - Advances in taxonomy and phylogenetics - ABSTRACT 174 Eastern Pacific scaleworms (Polynoidae, TUESDAY Midday • 13:15 • San Carlos Room The impact of intragenomic variation on Annelida) from seeps, vents and alpha-diversity estimations in whalefalls. metabarcoding studies: A case study Gregory Rouse, Avery Hiley, Sigrid Katz, Johanna Lindgren based on 18S rRNA amplicon data from Scripps Institution of Oceanography Sampling across deep sea habitats ranging from methane seeps (Oregon, marine nematodes California, Mexico Costa Rica), whale falls (California) and hydrothermal vents (Juan de Fuca, Gulf of California, EPR, Galapagos) has resulted in a Tiago Jose Pereira, Holly Bik remarkable diversity of undescribed polynoid scaleworms. We demonstrate University of California, Riverside this via DNA sequencing and morphology with respect to the range of Although intragenomic variation has been recognized as a common already described eastern Pacific polynoids. However, a series of phenomenon amongst eukaryote taxa, its effects on diversity estimations taxonomic problems cannot be solved until specimens from their (i.e. -
WCM 2001 Abstract Volume
Abstracts Council of UNITAS MALACOLOGICA 1998-2001 World Congress of President: Luitfried SALVINI-PLAWEN (Wien/Vienna, Austria) Malacology Secretary: Peter B. MORDAN (London, England, UK) Treasurer: Jackie VAN GOETHEM (Bruxelles/Brussels, Belgium) 2001 Members of Council: Takahiro ASAMI (Matsumoto, Japan) Klaus BANDEL (Hamburg, Germany) Yuri KANTOR (Moskwa/Moscow, Russia) Pablo Enrique PENCHASZADEH (Buenos Aires, Argentinia) John D. TAYLOR (London, England, UK) Vienna, Austria Retired President: Rüdiger BIELER (Chicago, USA) 19. – 25. August Edited by Luitfried Salvini-Plawen, Janice Voltzow, Helmut Sattmann and Gerhard Steiner Published by UNITAS MALACOLOGICA, Vienna 2001 I II Organisation of Congress Symposia held at the WCM 2001 Organisers-in-chief: Gerhard STEINER (Universität Wien) Ancient Lakes: Laboratories and Archives of Molluscan Evolution Luitfried SALVINI-PLAWEN (Universität Wien) Organised by Frank WESSELINGH (Leiden, The Netherlands) and Christiane TODT (Universität Wien) Ellinor MICHEL (Amsterdam, The Netherlands) (sponsored by UM). Helmut SATTMANN (Naturhistorisches Museum Wien) Molluscan Chemosymbiosis Organised by Penelope BARNES (Balboa, Panama), Carole HICKMAN Organising Committee (Berkeley, USA) and Martin ZUSCHIN (Wien/Vienna, Austria) Lisa ANGER Anita MORTH (sponsored by UM). Claudia BAUER Rainer MÜLLAN Mathias BRUCKNER Alice OTT Thomas BÜCHINGER Andreas PILAT Hermann DREYER Barbara PIRINGER Evo-Devo in Mollusca Karl EDLINGER (NHM Wien) Heidemarie POLLAK Organised by Gerhard HASZPRUNAR (München/Munich, Germany) Pia Andrea EGGER Eva-Maria PRIBIL-HAMBERGER and Wim J.A.G. DICTUS (Utrecht, The Netherlands) (sponsored by Roman EISENHUT (NHM Wien) AMS). Christine EXNER Emanuel REDL Angelika GRÜNDLER Alexander REISCHÜTZ AMMER CHAEFER Mag. Sabine H Kurt S Claudia HANDL Denise SCHNEIDER Matthias HARZHAUSER (NHM Wien) Elisabeth SINGER Molluscan Conservation & Biodiversity Franz HOCHSTÖGER Mariti STEINER Organised by Ian KILLEEN (Felixtowe, UK) and Mary SEDDON Christoph HÖRWEG Michael URBANEK (Cardiff, UK) (sponsored by UM). -
Historical and Biomechanical Analysis of Integration and Dissociation in Molluscan Feeding, with Special Emphasis on the True Limpets (Patellogastropoda: Gastropoda)
Historical and biomechanical analysis of integration and dissociation in molluscan feeding, with special emphasis on the true limpets (Patellogastropoda: Gastropoda) by Robert Guralnick 1 and Krister Smith2 1 Department of Integrative Biology and Museum of Paleontology, University of California, Berkeley, CA 94720-3140 USA email: [email protected] 2 Department of Geology and Geophysics, University of California, Berkeley, CA 94720 USA ABSTRACT Modifications of the molluscan feeding apparatus have long been recognized as a crucial feature in molluscan diversification, related to the important process of gathering energy from the envirornment. An ecologically and evolutionarily significant dichotomy in molluscan feeding kinematics is whether radular teeth flex laterally (flexoglossate) or do not (stereoglossate). In this study, we use a combination of phylogenetic inference and biomechanical modeling to understand the transformational and causal basis for flexure or lack thereof. We also determine whether structural subsystems making up the feeding system are structurally, functionally, and evolutionary integrated or dissociated. Regarding evolutionary dissociation, statistical analysis of state changes revealed by the phylogenetic analysis shows that radular and cartilage subsystems evolved independently. Regarding kinematics, the phylogenetic analysis shows that flexure arose at the base of the Mollusca and lack of flexure is a derived condition in one gastropod clade, the Patellogastropoda. Significantly, radular morphology shows no change at the node where kinematics become stereoglossate. However, acquisition of stereoglossy in the Patellogastropoda is correlated with the structural dissociation of the subradular membrane and underlying cartilages. Correlation is not causality, so we present a biomechanical model explaining the structural conditions necessary for the plesiomorphic kinematic state (flexoglossy). -
407072.F1.Pdf
Supplementary Table 1 Fragment Primer Primer sequence 28S rRNA small 28SF 5'-GAC CCG TCT TGA AGC ACG-3' 28SR 5'-CCA CAG CGC CAG TTC TGC TTA C-3' 28S rRNA large 28SF2 5'-ACC TAT TCT CAA ACT TTA AAT GG-3' 28SR2 5'-GAC TTC CCT TAC CTA CAT-3' 18S rRNA part A 18Sa2.0 5'-ATG GTT GCA AAG CTG AAA C-3' 18S9R 5'-GAT CCT TCC GCA GGT TCA CCT AC-3' 18S rRNA part B 18S1F 5'-TAC CTG GTT GAT CCT GCC AGT AG-3' 18S5R 5'-CTT GGC AAA TGC TTT CGC-3' 18S rRNA part C 18S3F 5'-GTT CGA TTC CGG AGA GGG A-3' 18Sbi 5'-GAG TCT CGT TCG TTA TCG GA-3' 16S rRNA 16Sa 5'-CGC CTG TTT ATC AAA AAC AT-3' 16Sb 5'-CTC CGG TTT GAA CTC AGA TCA-3' H3 H3aF 5'-ATG GCT CGT ACC AAG CAG ACV GC-3' H3aR 5'-ATA TCC TTR GGC ATR ATR GTG AC-3' PCR conditions Initial step 94°C 6min Denaturation 94°C 1min Annealing 50°C 1min Elongation 72°C 1min 30sec Final elongation 72°C 6min Cycles 45 Supplementary Table 2 Species 18S 28S1 28S2 28S3 28S4 H3 COI 16S Outgroups Annelida Eunice pennata AY040684 AY340391 DQ779731 AF321418 Tubifex tubifex GQ355437 GQ355465 GQ355465 EF179544 EU117545 Brachiopoda Eohemithiris grayi AF025936 AY839242 AY839242 AY839242 Lingula adamsi U08329 Terebratalia transversa FJ196115 AF342802 AF342802 AF342802 AF342802 FJ196085 Terebratulina retusa U08324 AY839244 AY839244 AY839244 DQ779768 AF334238 Cycliophora Symbion americanus EF142068 EF142087 EF142087 EF140778 EF140771 Symbion pandora Y14811 AY218133 AY218084 Entoprocta Barentsia gracilis FJ196109 AY210456 AY210456 AY210456 AY210456 FJ196079 Loxosomella murmanica AY218100 DQ279950 DQ279950 DQ279950 DQ279950 AY218150 Pedicellina -
Abstracts BIOMIN XV: 15Th International Symposium on Biomineralization 9–13 September 2019 • Munich, Germany
Abstracts BIOMIN XV: 15th International Symposium on Biomineralization 9–13 September 2019 • Munich, Germany 1. Keynote lectures (K1 – K8) ................................................................................................................. 2 2. Talks (T1 – T89) ................................................................................................................................... 4 3. Posters (P1 – P107) ............................................................................................................................. 31 Design/Layout Layout: www.conventus.de Editorial Deadline: 31 August 2019 1 K 1 K 3 On ion transport and concentration toward mineral formation Getting to the roots of apatite-based biomineralization of dental in sea urchin larvae hard tissues: from Conodonts and Cichlids to related Keren Kahi1, Neta Varsano1, Andrea Sorrentino2, Eva Pereiro2, Peter Rez3, bioinspired materials Steve Weiner1 and Lia Addadi*1 Elena V. Sturm*1 (née Rosseeva) 1Department of Structural Biology, Weizmann Institute of Science, Rehovot, 1Physical Chemistry, Zukunftskolleg, University of Konstanz, Konstanz, Israel Germany 2ALBA Synchrotron Light Source, MISTRAL Beamline−Experiments Division, Barcelona, Spain Chordates and especially vertebrates represent the most highly advanced and 3Department of Physics, Arizona State University, Tempe, AZ, USA complex group of organisms. The formation of their hierarchical apatite- organic based hard tissues is evolutionary optimized and exhibits high During mineralized tissue -
A Review of Bathyal Shell-Bearing Gastropods in Sagami Bay
国立科博専報,(47): 97–144,2011年4月15日 Mem. Natl. Mus. Nat. Sci., Tokyo, (47): 97–144, April 15, 2011 A Review of Bathyal Shell-bearing Gastropods in Sagami Bay Kazunori Hasegawa1 and Takashi Okutani2 1 Showa Memorial Institute, National Museum of Nature and Science, 4 –1–1 Amakubo, Tsukuba-shi, Ibaraki 305–0005, Japan. E-mail: [email protected] 2 Marine Biodiversity Research Program, Japan Agency for Marine-Earth Science and Technology, 2–15 Natsushima, Yokosuka-shi, Kanagawa 237–0061, Japan. Abstract. Shell-bearing gastropods occurring in Sagami Bay at bathyal depths from 400 to 1600 m were reviewed based on information in literature, voucher material of some previous studies, and newly acquired specimens. 110 species that have been recorded from this area in lit- erature, excluding those exclusively associated with chemosynthesis-based communities, were reclassified into 97 species. 23 species were newly added to the fauna, resulting in 120 species in total recorded from this area. Among them, 88 species were identified as named species, two were only referrable to similar species, and 30 were not identifiable as any species previously known, at least in the northwestern Pacific. Among the 88 named species, six were recorded for the first time in this area, including one recorded for the first time in Japanese waters. Based on these results, the characteristics of the gastropod fauna in the Sagami Bay and adjacent areas is discussed from the bathymetrical and geographical points of view. Key words: Gastropoda, Sagami, bathyal, fauna, biogeography. continental shelf of the bay has thus been well Introduction documented (see Hasegawa, 2006 for gastro- The Sagami-nada (the Japanese word “nada” pods). -
Worldwide Phylogeography of Limpets of the Order Patellogastropoda: Molecular, Morphological and Palaeontological Evidence
WORLDWIDE PHYLOGEOGRAPHY OF LIMPETS OF THE ORDER PATELLOGASTROPODA: MOLECULAR, MORPHOLOGICAL AND PALAEONTOLOGICAL EVIDENCE TOMOYUKI NAKANO AND TOMOWO OZAWA Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan (Received 6 November 2006; accepted 19 December 2006) ABSTRACT A molecular phylogeny, based on sequence data from three mitochondrial (12S rRNA, 16S rRNA and Downloaded from https://academic.oup.com/mollus/article-abstract/73/1/79/2939649 by guest on 09 October 2019 COI) genes, is presented for the Patellogastropoda, including representatives of almost all genera belonging to the Acmaeidae, Lepetidae, Lottiidae, Nacellidae and Patellidae. For comparison, a smaller dataset of sequences from two nuclear (18S rRNA and 28S rRNA) genes is presented. The mito- chondrial gene phylogeny shows considerable disagreement with earlier hypotheses derived from mor- phological data. The Patellidae, Nacellidae and Lepetidae are monophyletic, but the Acmaeidae and Lottiidae are polyphyletic. The family Acmaeidae is divided into two clades corresponding to the sub- families Acmaeinae and Pectinodontinae, but these two do not form a clade. The Acmaeinae are syno- nymized with the Lottiidae, and the Pectinodontinae are elevated to familial rank. Our results suggest that the Patelloida profunda group (formerly assigned to the Lottiidae) is the most basal group within the Patellogastropoda. We assign this group to a new genus, Eoacmaea, in the new family Eoacmaeidae. We used a Bayesian Markov-Chain Monte Carlo approach together with the fossil record to estimate diver- gence times from the combined DNA sequence data. The lineage of extant Patellogastropoda is esti- mated to have originated as long ago as Late Jurassic. -
Dr. Chong Chen, Ma Dphil (Oxon.)
CURRICULUM VITAE DR. CHONG CHEN, MA DPHIL (OXON.) DATE OF BIRTH: April 3, 1990 NATIONALITY: Hong Kong SAR ORCID: 0000-0002-5035-4021 http://squamiferum.net/ ADDRESS Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Yokosuka Headquar ters 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan Tel: +81 (0)46-867-9717 E-mail: [email protected] PERSONAL STATEMENT Biologist with research foci on invertebrate animals and the deep sea, especially chemosynthesis-based, ecosystems. Key interests include adaptation, evolution, biogeography, ecology, biodiversity, taxonomy and systematics. Trained and skilled in both morphological (e.g., dissection, histology, electron microscopy) and molecular (e.g., barcoding, phylogenetics, population genetics) methodologies. Constantly seeking and developing new techniques required to answer scientific questions, recently using synchrotron CT to investigate adaptation to hydrothermal vents. Experienced malacologist with expertise especially in the taxonomy of gastropods. Able to disseminate results timely in peer-reviewed literature with a proven track record for publishing scientific papers. Always actively collaborating internationally and constantly seeks for new collaborations. Extensive records in field expedition and exploration at sea, logging over 300 days on-board over 20 voyages, using manned submersibles, ROV, AUV, CTD, among other equipment. Highly experienced in both talk and poster presentations at conferences and symposiums. Involved in and motivated by public engagement and outreach