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Brittle-Star Mass Occurrence on a Late Cretaceous Methane Seep from South Dakota, USA Received: 16 May 2018 Ben Thuy1, Neil H
www.nature.com/scientificreports OPEN Brittle-star mass occurrence on a Late Cretaceous methane seep from South Dakota, USA Received: 16 May 2018 Ben Thuy1, Neil H. Landman2, Neal L. Larson3 & Lea D. Numberger-Thuy1 Accepted: 29 May 2018 Articulated brittle stars are rare fossils because the skeleton rapidly disintegrates after death and only Published: xx xx xxxx fossilises intact under special conditions. Here, we describe an extraordinary mass occurrence of the ophiacanthid ophiuroid Brezinacantha tolis gen. et sp. nov., preserved as articulated skeletons from an upper Campanian (Late Cretaceous) methane seep of South Dakota. It is uniquely the frst fossil case of a seep-associated ophiuroid. The articulated skeletons overlie centimeter-thick accumulations of dissociated skeletal parts, suggesting lifetime densities of approximately 1000 individuals per m2, persisting at that particular location for several generations. The ophiuroid skeletons on top of the occurrence were preserved intact most probably because of increased methane seepage, killing the individuals and inducing rapid cementation, rather than due to storm-induced burial or slumping. The mass occurrence described herein is an unambiguous case of an autochthonous, dense ophiuroid community that persisted at a particular spot for some time. Thus, it represents a true fossil equivalent of a recent ophiuroid dense bed, unlike other cases that were used in the past to substantiate the claim of a mid-Mesozoic predation-induced decline of ophiuroid dense beds. Brittle stars, or ophiuroids, are among the most abundant and widespread components of the marine benthos, occurring at all depths and latitudes of the world oceans1. Most of the time, however, ophiuroids tend to live a cryptic life hidden under rocks, inside sponges, epizoic on corals or buried in the mud (e.g.2) to such a point that their real abundance is rarely appreciated at frst sight. -
Durham Research Online
Durham Research Online Deposited in DRO: 23 May 2017 Version of attached le: Accepted Version Peer-review status of attached le: Peer-reviewed Citation for published item: Betts, Marissa J. and Paterson, John R. and Jago, James B. and Jacquet, Sarah M. and Skovsted, Christian B. and Topper, Timothy P. and Brock, Glenn A. (2017) 'Global correlation of the early Cambrian of South Australia : shelly fauna of the Dailyatia odyssei Zone.', Gondwana research., 46 . pp. 240-279. Further information on publisher's website: https://doi.org/10.1016/j.gr.2017.02.007 Publisher's copyright statement: c 2017 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ Additional information: Use policy The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full DRO policy for further details. Durham University Library, Stockton Road, Durham DH1 3LY, United Kingdom Tel : +44 (0)191 334 3042 | Fax : +44 (0)191 334 2971 https://dro.dur.ac.uk Accepted Manuscript Global correlation of the early Cambrian of South Australia: Shelly fauna of the Dailyatia odyssei Zone Marissa J. -
Phylogenomic Resolution of the Class Ophiuroidea Unlocks a Global Microfossil Record
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Current Biology 24, 1874–1879, August 18, 2014 ª2014 Elsevier Ltd All rights reserved http://dx.doi.org/10.1016/j.cub.2014.06.060 Report Phylogenomic Resolution of the Class Ophiuroidea Unlocks a Global Microfossil Record Timothy D. O’Hara,1,* Andrew F. Hugall,1 Ben Thuy,2 We used a phylogenomic approach to address these defi- and Adnan Moussalli1 ciencies, obtaining 52 de novo ophiuroid transcriptomes and 1Museum Victoria, GPO Box 666, Melbourne, VIC 3001, three from other echinoderm classes, in addition to three pub- Australia lically available transcriptomes and three genomes (see Table 2Section Pale´ ontologie, Muse´ e National d’Histoire Naturelle du S1 available online). Twenty-nine of the ophiuroid transcrip- Luxembourg, 24 Rue Mu¨ nster, 2160 Luxembourg tomes were obtained from deep-sea (>500 m) samples, to ensure adequate taxonomic representation across the class. We identified and aligned 425 orthologous genes that could Summary be annotated using available sea urchin, hemichordate, or actinopterygian genomes (Table S2). After trimming, we used Our understanding of the origin, evolution, and biogeog- 102,143 amino acid positions to reconstruct a phylogeny of raphy of seafloor fauna is limited because we have insuf- the Echinodermata, with a focus on the ophiuroids (Figure 1). ficient spatial and temporal data to resolve underlying The resulting sequence matrix is 85% complete (Figure S1) processes [1]. The abundance and wide distribution of mod- and is the largest genetic data set ever assembled to analyze ern and disarticulated fossil Ophiuroidea [2], including brittle phylogenetic relationships within echinoderms. -
THE LISTING of PHILIPPINE MARINE MOLLUSKS Guido T
August 2017 Guido T. Poppe A LISTING OF PHILIPPINE MARINE MOLLUSKS - V1.00 THE LISTING OF PHILIPPINE MARINE MOLLUSKS Guido T. Poppe INTRODUCTION The publication of Philippine Marine Mollusks, Volumes 1 to 4 has been a revelation to the conchological community. Apart from being the delight of collectors, the PMM started a new way of layout and publishing - followed today by many authors. Internet technology has allowed more than 50 experts worldwide to work on the collection that forms the base of the 4 PMM books. This expertise, together with modern means of identification has allowed a quality in determinations which is unique in books covering a geographical area. Our Volume 1 was published only 9 years ago: in 2008. Since that time “a lot” has changed. Finally, after almost two decades, the digital world has been embraced by the scientific community, and a new generation of young scientists appeared, well acquainted with text processors, internet communication and digital photographic skills. Museums all over the planet start putting the holotypes online – a still ongoing process – which saves taxonomists from huge confusion and “guessing” about how animals look like. Initiatives as Biodiversity Heritage Library made accessible huge libraries to many thousands of biologists who, without that, were not able to publish properly. The process of all these technological revolutions is ongoing and improves taxonomy and nomenclature in a way which is unprecedented. All this caused an acceleration in the nomenclatural field: both in quantity and in quality of expertise and fieldwork. The above changes are not without huge problematics. Many studies are carried out on the wide diversity of these problems and even books are written on the subject. -
Crinoids from the Middle Jurassic (Bajocian–Lower Callovian) of Arde`Che, France
Swiss J Palaeontol (2012) 131:211–253 DOI 10.1007/s13358-012-0044-9 Crinoids from the Middle Jurassic (Bajocian–Lower Callovian) of Arde`che, France Hans Hess Received: 24 February 2012 / Accepted: 25 April 2012 / Published online: 6 June 2012 Ó Akademie der Naturwissenschaften Schweiz (SCNAT) 2012 Abstract Several Middle Jurassic outcrops in the Arde`che results demonstrate that the Middle Jurassic crinoids from Department near La Voulte-sur-Rhoˆne and St-E´tienne-de- the Arde`che are one of the important and diverse Mesozoic Boulogne are rich in the remains of crinoids, but these were crinoid faunas. Some forms bridge the gap between the known from surface collections only and were not descri- Early Jurassic and the Late Jurassic hardground faunas of bed using present standards of systematics. This paper cyrtocrinids. Cyrtocrinus praenutans n. sp., a form similar brings the taxonomic status of the previously described to Cyrtocrinus nutans (GOLDFUSS) from the Oxfordian, is crinoids up to date, reassesses the systematic position of described as a separate species despite some overlapping some of the species based on cups and describes new phenotypic variability of cups and columnals. Pathological forms. Sampling and washing of bulk material from the deformations on all types of ossicles of C. praenutans n. sp. Lower Bathonian of the La Pouza locality yielded nearly are ascribed to the epizoan commensal Oichnus para- 100,000 crinoid ossicles. Among them are rare comatulids boloides BROMLEY. Different species are dominant at the with the following recognized as new: Andymetra galei n. different Bathonian localities, namely C. praenutans n. -
Echinodermata, Asteroidea) and Ophiuroids (Echino Dermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of Central Spitsbergen
European Journal of Taxonomy 411: 1–26 ISSN 2118-9773 https://doi.org/10.5852/ejt.2018.411 www.europeanjournaloftaxonomy.eu 2018 · Rousseau J. et al. This work is licensed under a Creative Commons Attribution 3.0 License. Research article urn:lsid:zoobank.org:pub:20D7A744-CE8B-4E6C-92DA-71A9B8C3D805 New articulated asteroids (Echinodermata, Asteroidea) and ophiuroids (Echino dermata, Ophiuroidea) from the Late Jurassic (Volgian / Tithonian) of central Spitsbergen Julie ROUSSEAU 1,*, Andrew Scott GALE 2 & Ben THUY 3 1 1111 Belle Pre Way, Apt. 537, Alexandria, VA, 22314, United States of America. 2 School of Earth & Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, PO1 3QL, United Kingdom. 3 Department of Palaeontology, Natural History Museum Luxembourg, Luxembourg-City, Luxembourg. * Corresponding author: [email protected] 2 Email: [email protected] 3 Email: [email protected] 1 urn:lsid:zoobank.org:author:C58AF561-3A85-4615-B5A4-BA3D323F7A25 2 urn:lsid:zoobank.org:author:092855B9-CBE4-41F9-9861-3BEA1FDE50F1 3 urn:lsid:zoobank.org:author:04186A8C-3F0D-485E-834A-08414A217ACA Abstract. The Late Jurassic–Early Cretaceous Slottsmøya Member of the Agardhfjellet Formation in central Spitsbergen has yielded two new species of asteroids and two species of ophiuroids, one of which is described as new. Polarasterias janusensis Rousseau & Gale gen. et sp. nov. is a forcipulatid neoasteroid with elongated arms, small disc and very broad ambulacral grooves with narrow adambulacrals. Savignaster septemtrionalis Rousseau & Gale sp. nov. is a pterasterid with well- developed interradial chevrons. The Spitsbergen specimens are the fi rst described articulated material of Savignaster and reveal the overall arrangement of the ambulacral groove ossicles. -
Keeping a Lid on It: Muscle Scars and the Mystery of the Mobergellidae
1 Keeping a lid on it: muscle scars and the mystery of the 2 Mobergellidae 3 4 TIMOTHY P. TOPPER1,2* and CHRISTIAN B. SKOVSTED1 5 6 1Department of Palaeobiology, Swedish Museum of Natural History, P.O. Box 50007, 7 SE-104 05, Stockholm, Sweden. 8 2Palaeoecosystems Group, Department of Earth Sciences, Durham University, Durham 9 DH1 3LE, UK. 10 11 Mobergellans were one of the first Cambrian skeletal groups to be recognized yet have 12 long remained one of the most problematic in terms of biological function and affinity. 13 Typified by a disc-shaped, phosphatic sclerite the most distinctive character of the 14 group is a prominent set of internal scars, interpreted as representing sites of former 15 muscle attachment. Predominantly based on muscle scar distribution, mobergellans 16 have been compared to brachiopods, bivalves and monoplacophorans, however a 17 recurring theory that the sclerites acted as operculum remains untested. Rather than 18 correlate the number of muscle scars between taxa, here we focus on the percentage of 19 the inner surface shell area that the scars constitute. We investigate two mobergellan 20 species, Mobergella holsti and Discinella micans comparing the Cambrian taxa with the 21 muscle scars of a variety of extant and fossil marine invertebrate taxa to test if the 22 mobergellan muscle attachment area is compatible with an interpretation as operculum. 23 The only skeletal elements in our study with a comparable muscle attachment 24 percentage are gastropod opercula. Complemented with additional morphological 25 information, our analysis supports the theory that mobergellan sclerites acted as an 26 operculum presumably from a tube-living organism. -
Gastropoda: Caenogastropoda: Eulimidae) from Japan, with a Revised Diagnosis of the Genus
VENUS 78 (3–4): 71–85, 2020 ©The Malacological Society of Japan DOI: http://doi.org/10.18941/venus.78.3-4_71Three New Species of Hemiliostraca September 25, 202071 Three New Species of Hemiliostraca and a Redescription of H. conspurcata (Gastropoda: Caenogastropoda: Eulimidae) from Japan, with a Revised Diagnosis of the Genus Haruna Matsuda1*, Daisuke Uyeno2 and Kazuya Nagasawa3 1Center for Faculty-wide General Education, Shikoku University, 123-1, Ebisuno, Furukawa, Ojin-cho, Tokushima-shi, Tokushima 771-1192, Japan 2Graduate School of Science and Engineering, Kagoshima University, 1-21-35, Korimoto, Kagoshima 890-0065, Japan 3Aquaparasitology Laboratory, 365-61 Kusanagi, Shizuoka 424-0886, Japan Abstract: Three new species of the eulimid gastropod genus Hemiliostraca Pilsbry, 1917, i.e., H. capreolus n. sp., H. tenuis n. sp., and H. maculata n. sp., are described and H. conspurcata (A. Adams, 1863) is redescribed based on newly obtained material from Japan. The diagnosis of the genus is also revised. Hemiliostraca capreolus n. sp. was previously misidentied as H. samoensis in museum collections and in literature. This new species was collected from Okinawa-jima Island and Amami-Oshima Island, southern Japan, and can be distinguished from H. samoensis by its distinct color patterns and markings. A recently collected specimen from an unidentied species of ophiuroid from Wakayama Prefecture, central Japan, is herein conrmed to be identiable with H. conspurcata, which has not been recorded since its originally description from central Japan in 1863. Hemiliostraca tenuis n. sp. was collected from an unidentied species of sponge and the ophiuroid Ophiarachnella septemspinosa from Kume-jima Island, southern Japan. -
An Annotated Checklist of the Marine Macroinvertebrates of Alaska David T
NOAA Professional Paper NMFS 19 An annotated checklist of the marine macroinvertebrates of Alaska David T. Drumm • Katherine P. Maslenikov Robert Van Syoc • James W. Orr • Robert R. Lauth Duane E. Stevenson • Theodore W. Pietsch November 2016 U.S. Department of Commerce NOAA Professional Penny Pritzker Secretary of Commerce National Oceanic Papers NMFS and Atmospheric Administration Kathryn D. Sullivan Scientific Editor* Administrator Richard Langton National Marine National Marine Fisheries Service Fisheries Service Northeast Fisheries Science Center Maine Field Station Eileen Sobeck 17 Godfrey Drive, Suite 1 Assistant Administrator Orono, Maine 04473 for Fisheries Associate Editor Kathryn Dennis National Marine Fisheries Service Office of Science and Technology Economics and Social Analysis Division 1845 Wasp Blvd., Bldg. 178 Honolulu, Hawaii 96818 Managing Editor Shelley Arenas National Marine Fisheries Service Scientific Publications Office 7600 Sand Point Way NE Seattle, Washington 98115 Editorial Committee Ann C. Matarese National Marine Fisheries Service James W. Orr National Marine Fisheries Service The NOAA Professional Paper NMFS (ISSN 1931-4590) series is pub- lished by the Scientific Publications Of- *Bruce Mundy (PIFSC) was Scientific Editor during the fice, National Marine Fisheries Service, scientific editing and preparation of this report. NOAA, 7600 Sand Point Way NE, Seattle, WA 98115. The Secretary of Commerce has The NOAA Professional Paper NMFS series carries peer-reviewed, lengthy original determined that the publication of research reports, taxonomic keys, species synopses, flora and fauna studies, and data- this series is necessary in the transac- intensive reports on investigations in fishery science, engineering, and economics. tion of the public business required by law of this Department. -
A New Species of Mucronalia (Gastropoda: Eulimidae) Parasitizing the Ophiocomid Brittle Star Ophiomastix Mixta in Japan
DOI: http://doi.org/10.18941/venus.77.1-4_45 Short Notes ©The Malacological Society of Japan45 Short Notes A New Species of Mucronalia (Gastropoda: Eulimidae) Parasitizing the Ophiocomid Brittle Star Ophiomastix mixta in Japan Tsuyoshi Takano1,2*, Hayate Tanaka3,4 and Yasunori Kano2 1Meguro Parasitological Museum, 4-1-1 Shimomeguro, Meguro, Tokyo 153-0064, Japan; *[email protected] 2Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan 3Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo 113-0033, Japan 4National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan Gastropods of the family Eulimidae Over 30 species have been described in this genus, (Caenogastropoda: Vanikoroidea) are parasites of largely based on the presence of a mucronate apex or echinoderms including all five classes of the a calloused inner lip (e.g., Pease, 1860; Habe, 1974). phylum, namely Asteroidea, Crinoidea, Echinoidea, However, Warén (1980a) has transferred more Holothuroidea and Ophiuroidea (Warén, 1984). than half of them to other eulimid genera such as The Eulimidae contain numerous extant and extinct Echineulima Lützen & Nielsen, 1975, Hypermastus species (Bouchet et al., 2002; Lozouet, 2014), but Pilsbry, 1899 and Melanella Bowdich, 1822 or to many remain to be described (Warén, 1984). This the cerithioid family Pelycidiidae (see Ponder & has led to a number of recent publications on eulimid Hall, 1983: fig. 1C; Takano & Kano, 2014). Some systematics that aim at a better understanding of ten described species remain in Mucronalia, all their ecological, morphological and species diversity of which bear the mucronate apex, parietal callus (e.g., Matsuda et al., 2010, 2013; Dgebuadze et and curved outer lip of the shell (Warén, 1980a). -
Redescriptions and Attachment Modes of Hypermastus Peronellicola and H
VENUS 69 (1–2): 25–39, 2010 ©Malacological Society of Japan Redescriptions and Attachment Modes of Hypermastus peronellicola and H. tokunagai (Prosobranchia: Eulimidae), Ectoparasites on Sand Dollars (Echinodermata: Clypeasteroida) in Japanese Waters Haruna Matsuda1*, Tatsuo Hamano2, Shigeo Hori3 and Kazuya Nagasawa1 1Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8528, Japan 2Institute of Socio-Arts and Sciences, the University of Tokushima, Tokushima 770-8502, Japan 3Hagi Museum, 355, Horiuchi, Hagi, Yamaguchi 758-0057, Japan Abstract: Two species of the eulimid genus Hypermastus are redescribed based on specimens recently collected from sand dollars caught in the Seto Inland Sea and the type specimens: Hypermastus peronellicola (Kuroda & Habe, 1950) from Peronella japonica, and H. tokunagai (Yokoyama, 1922) from Scaphechinus mirabilis. These two eulimid species are very similar in their shell morphology but are distinguished from each other based on characters such as the proportions of shell length to several dimensions of the shell, width/length ratios of each teleoconch whorl, the protruding part of the outer lip margin, and the coloration of the visceral mass that can be seen through the translucent shell in living specimens. H. peronellicola was attached to the host by inserting the proboscis into the host’s body, whereas no proboscis penetration was observed in H. tokunagai. Keywords: eulimids, Hypermastus peronellicola, Hypermastus tokunagai, parasitic gastropod, redescription, sand dollar Introduction Gastropods belonging to the family Eulimidae are known to infest echinoderms (Warén, 1980, 1984; Bouchet & Warén, 1986; Jangoux, 1990). The eulimid genus Hypermastus is a small group that is exclusively parasitic on irregular sea urchins (sand dollars and heart urchins). -
Sepkoski, J.J. 1992. Compendium of Fossil Marine Animal Families
MILWAUKEE PUBLIC MUSEUM Contributions . In BIOLOGY and GEOLOGY Number 83 March 1,1992 A Compendium of Fossil Marine Animal Families 2nd edition J. John Sepkoski, Jr. MILWAUKEE PUBLIC MUSEUM Contributions . In BIOLOGY and GEOLOGY Number 83 March 1,1992 A Compendium of Fossil Marine Animal Families 2nd edition J. John Sepkoski, Jr. Department of the Geophysical Sciences University of Chicago Chicago, Illinois 60637 Milwaukee Public Museum Contributions in Biology and Geology Rodney Watkins, Editor (Reviewer for this paper was P.M. Sheehan) This publication is priced at $25.00 and may be obtained by writing to the Museum Gift Shop, Milwaukee Public Museum, 800 West Wells Street, Milwaukee, WI 53233. Orders must also include $3.00 for shipping and handling ($4.00 for foreign destinations) and must be accompanied by money order or check drawn on U.S. bank. Money orders or checks should be made payable to the Milwaukee Public Museum. Wisconsin residents please add 5% sales tax. In addition, a diskette in ASCII format (DOS) containing the data in this publication is priced at $25.00. Diskettes should be ordered from the Geology Section, Milwaukee Public Museum, 800 West Wells Street, Milwaukee, WI 53233. Specify 3Y. inch or 5Y. inch diskette size when ordering. Checks or money orders for diskettes should be made payable to "GeologySection, Milwaukee Public Museum," and fees for shipping and handling included as stated above. Profits support the research effort of the GeologySection. ISBN 0-89326-168-8 ©1992Milwaukee Public Museum Sponsored by Milwaukee County Contents Abstract ....... 1 Introduction.. ... 2 Stratigraphic codes. 8 The Compendium 14 Actinopoda.