Early Toarcian Oceanic Anoxic Event): New Microfossils from the Dudelange Drill Core, Luxembourg
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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. -
A New Bathyal Ophiacanthid Brittle Star (Ophiuroidea: Ophiacanthidae) with Caribbean Affinities from the Plio-Pleistocene of the Mediterranean
Zootaxa 4820 (1): 019–030 ISSN 1175-5326 (print edition) https://www.mapress.com/j/zt/ Article ZOOTAXA Copyright © 2020 Magnolia Press ISSN 1175-5334 (online edition) https://doi.org/10.11646/zootaxa.4820.1.2 http://zoobank.org/urn:lsid:zoobank.org:pub:ED703EC8-3124-413F-8B17-3C1695B789C5 A new bathyal ophiacanthid brittle star (Ophiuroidea: Ophiacanthidae) with Caribbean affinities from the Plio-Pleistocene of the Mediterranean LEA D. NUMBERGER-THUY & BEN THUY* Natural History Museum Luxembourg, Department of Palaeontology, 25, rue Münster, 2160 Luxembourg, Luxembourg; https://orcid.org/0000-0001-6097-995X *corresponding author: [email protected]; https://orcid.org/0000-0001-8231-9565 Abstract Identifiable remains of large deep-sea invertebrates are exceedingly rare in the fossil record. Thus, every new discovery adds to a better understanding of ancient deep-sea environments based on direct fossil evidence. Here we describe a collection of dissociated skeletal parts of ophiuroids (brittle stars) from the latest Pliocene to earliest Pleistocene of Sicily, Italy, preserved as microfossils in sediments deposited at shallow bathyal depths. The material belongs to a previously unknown species of ophiacanthid brittle star, Ophiacantha oceani sp. nov. On the basis of morphological comparison of skeletal microstructures, in particular spine articulations and vertebral articular structures of the lateral arm plates, we conclude that the new species shares closest ties with Ophiacantha stellata, a recent species living in the present-day Caribbean at bathyal depths. Since colonization of the deep Mediterranean following the Messinian crisis at the end of the Miocene was only possibly via the Gibraltar Sill, the presence of tropical western Atlantic clades in the Plio-Pleistocene of the Mediterranean suggests a major deep-sea faunal turnover yet to be explored. -
Dissertation Docteur De L'université Du Luxembourg
PhD-FSTM-2020-079 The Faculty of Science, Technology and Medicine DISSERTATION Defence held on 10/12/2020 in Esch-sur-Alzette to obtain the degree of DOCTEUR DE L’UNIVERSITÉ DU LUXEMBOURG EN SCIENCES DE L’INGÉNIEUR by Vishojit Bahadur THAPA Born on 6th October 1991 in Luxembourg City (Luxembourg) RECYCLING OF GRAVEL WASH MUD FOR MANUFACTURING CO2-REDUCED CEMENT Dissertation defence committee A-Prof. Dr.-Ing. Joachim Hansen, Chairman Associate Professor, University of Luxembourg, Faculty of Science, Technology and Medicine Prof. Dr. André Lecomte, Vice-Chairman Professor, University of Lorraine, Institut Jean Lamour Prof. Dr.-Ing. Danièle Waldmann, Dissertation supervisor Professor, University of Luxembourg, Faculty of Science, Technology and Medicine Prof. Dr. Jean-Frank Wagner Professor, University of Trier, Department of Geology Dr. Claude Simon Expert, Head of Quality Management, Cimalux S.A. Preface and acknowledgements This doctoral dissertation presents the results of my investigations on the topic of “Recycling of gravel wash mud for manufacturing CO2-reduced cement”, which were realised during my PhD journey at the Institute of Civil and Environmental Engineering (INCEEN) of the University of Luxembourg. This research project was mainly carried out at the Laboratory of Solid Structures (LSS) of the University of Luxembourg. It deals with the revalorisation of an unused industrial waste product, namely gravel wash mud (GWM) and its utilisation for the conceptualisation of potential “low carbon” cements. The execution of the present project and the writing of this dissertation were carried out in the period from the 1st of September 2016 to the 10th of November 2020. My sincere and special thanks go to Prof. -
In Situ Observations Increase the Diversity Records of Rocky-Reef Inhabiting Echinoderms Along the South West Coast of India
Indian Journal of Geo Marine Sciences Vol. 48 (10), October 2019, pp. 1528-1533 In situ observations increase the diversity records of Rocky-reef inhabiting Echinoderms along the South West Coast of India Surendar Chandrasekar1*, Singarayan Lazarus2, Rethnaraj Chandran3, Jayasingh Chellama Nisha3, Gigi Chandra Rajan4 and Chowdula Satyanarayana1 1Marine Biology Regional Centre, Zoological Survey of India, Chennai 600 028, Tamil Nadu, India 2Institute for Environmental Research and Social Education, No.150, Nesamony Nagar, Nagercoil 629001, Tamil Nadu, India 3GoK-Coral Transplantation/Restoration Project, Zoological Survey of India - Field Station, Jamnagar 361 001, Gujrat, India 4Department of Zoology, All Saints College, Trivandrum 695 008, Kerala, India *[Email: [email protected]] Received 19 January 2018; revised 23 April 2018 Diversity of Echinoderms was studied in situ in rocky reefs areas of the south west coast of India from Goa (Lat. N 15°21.071’; Long. E 073°47.069’) to Kanyakumari (Lat. N 08°06.570’; Long. E 077°18.120’) via Karnataka and Kerala. The underwater visual census to assess the biodiversity was carried out by SCUBA diving. This study reveals 11 new records to Goa, 7 to Karnataka, 5 to Kerala and 7 to the west coast of Tamil Nadu. A total of 15 species representing 12 genera, 10 families, 8 orders and 5 Classes were recorded namely Holothuria atra, H. difficilis, H. leucospilota, Actinopyga mauritiana, Linckia laevigata, Temnopleurus toreumaticus, Salmacis bicolor, Echinothrix diadema, Stomopneustes variolaris, Macrophiothrix nereidina, Tropiometra carinata, Linckia multifora, Fromia milleporella and Ophiocoma scolopendrina. Among these, the last three are new records to the west coast of India. -
(Echinodermata) from the Late Maastrichtian of South Carolina, USA
Swiss Journal of Palaeontology (2018) 137:337–356 https://doi.org/10.1007/s13358-018-0166-9 (0123456789().,-volV)(0123456789().,-volV) REGULAR RESEARCH ARTICLE An unusual assemblage of ophiuroids (Echinodermata) from the late Maastrichtian of South Carolina, USA 1 1 2 Ben Thuy • Lea D. Numberger-Thuy • John W. M. Jagt Received: 19 July 2018 / Accepted: 14 September 2018 / Published online: 28 September 2018 Ó Akademie der Naturwissenschaften Schweiz (SCNAT) 2018 Abstract A small, albeit diverse, assemblage of dissociated ophiuroid ossicles, mostly lateral arm plates, from the upper Maas- trichtian Peedee Formation temporarily (August 1998) exposed at North Myrtle Beach (Horry County, South Carolina), is described and illustrated. This lot comprises at least seven species, five of which are new and formally named herein. The assemblage is of note in providing a significant expansion of the palaeobiogeographical record of latest Cretaceous brittle stars. Furthermore, it includes a new genus and species of the family Asteronychidae that is transitional between the stem euryalid Melusinaster and Recent asteronychids, as well as the oldest unambiguous fossil representative of the family Amphiuridae. Finally, this assemblage stands out in lacking Ophiotitanos and ophiomusaids, two of the most widely distributed and abundant brittle star taxa during the Late Cretaceous. Instead, it is dominated by members of the Amphilimnidae, Amphiuridae and Euryalida, which are amongst the rarest components in the faunal spectrum of modern- day equivalents. The assemblage represents a unique combination of taxa unknown from any other outcrops of upper Mesozoic rocks and seems to document the onset of modern shallow-sublittoral ophiuroid assemblages. Keywords Late Cretaceous Á North America Á New species Á Palaeoecology Introduction undertaken on a large scale in the United States. -
Benthic Habitats and Biodiversity of Dampier and Montebello Marine
CSIRO OCEANS & ATMOSPHERE Benthic habitats and biodiversity of the Dampier and Montebello Australian Marine Parks Edited by: John Keesing, CSIRO Oceans and Atmosphere Research March 2019 ISBN 978-1-4863-1225-2 Print 978-1-4863-1226-9 On-line Contributors The following people contributed to this study. Affiliation is CSIRO unless otherwise stated. WAM = Western Australia Museum, MV = Museum of Victoria, DPIRD = Department of Primary Industries and Regional Development Study design and operational execution: John Keesing, Nick Mortimer, Stephen Newman (DPIRD), Roland Pitcher, Keith Sainsbury (SainsSolutions), Joanna Strzelecki, Corey Wakefield (DPIRD), John Wakeford (Fishing Untangled), Alan Williams Field work: Belinda Alvarez, Dion Boddington (DPIRD), Monika Bryce, Susan Cheers, Brett Chrisafulli (DPIRD), Frances Cooke, Frank Coman, Christopher Dowling (DPIRD), Gary Fry, Cristiano Giordani (Universidad de Antioquia, Medellín, Colombia), Alastair Graham, Mark Green, Qingxi Han (Ningbo University, China), John Keesing, Peter Karuso (Macquarie University), Matt Lansdell, Maylene Loo, Hector Lozano‐Montes, Huabin Mao (Chinese Academy of Sciences), Margaret Miller, Nick Mortimer, James McLaughlin, Amy Nau, Kate Naughton (MV), Tracee Nguyen, Camilla Novaglio, John Pogonoski, Keith Sainsbury (SainsSolutions), Craig Skepper (DPIRD), Joanna Strzelecki, Tonya Van Der Velde, Alan Williams Taxonomy and contributions to Chapter 4: Belinda Alvarez, Sharon Appleyard, Monika Bryce, Alastair Graham, Qingxi Han (Ningbo University, China), Glad Hansen (WAM), -
Ophiuroidea: Amphilepidida: Amphiuridae), from Geoje Island, Korea
-페이지 연속.(가능한한 짝수되게). -표 선: 맨위,맨아래 1pt / 중간 0.3pt -표 내부여백 : 선 있는 곳 2, 선 없는 곳 0.7 -et al. Journal of Species Research 9(3):273-279, 2020 A newly recorded brittle star, Amphiura (Amphiura) digitula (H.L. Clark, 1911) (Ophiuroidea: Amphilepidida: Amphiuridae), from Geoje Island, Korea Taekjun Lee1 and Sook Shin1,2 1Marine Biological Resource Institute, Sahmyook University, Seoul 01795, Republic of Korea 2Department of Animal Biotechnology and Resource, Sahmyook University, Seoul 01795, Republic of Korea *Correspondent: [email protected] We describe a newly recorded brittle star to South Korea, Amphiura (Amphiura) digitula (H.L. Clark, 1911), that was collected from Geoje Island, at a depth of 47 m. The species is characterized by a small disk, covered by numerous fine scales, small radial shields that are wider than long, a small stumpy hook at the distal end of the radial shield, two tooth papilla, two adoral shield spines, 2nd adoral shield spine longer than other, tapered dramatically toward dull tip, five arms with four proximal arm spines, and two tentacle scales. We also obtained a 657 bp sequence from COI gene and the amplified sequence matched the general DNA barcoding region. The NJ and ML phylogenetic analyses revealed A. (A.) digitula as monophyletic in the Amphiura clade. This species is clearly distinguished from other Amphiura species by morphological characteristics and the mitochondrial COI sequence, and thus represents the sixth Amphiura species reported to occur in Korea. Keywords: Echinodermata, mitochondrial COI, morphology, ophiuroid, taxonomy Ⓒ 2020 National Institute of Biological Resources DOI:10.12651/JSR.2020.9.3.273 INTRODUCTION al., 2016; Boissin et al., 2017; Knott et al., 2018; Paw- son, 2018). -
(Echinodermata: Ophiuroidea) Del Talud De La Península De Yucatán, México
Durán-González, A., Laguarda-Figueras, A., Solís-Marín, F.A., Gracia, A. & Vázquez-Bader, A.R. (2021). Biodiversidad de ofiuroideos (Echinodermata: Ophiuroidea) del talud de la Península de Yucatán, México. Revista de Biología Tropical, 69(S1), 132- 153. DOI 10.15517/rbt.v69iSuppl.1.46337 DOI 10.15517/rbt.v69iSuppl.1.46337 Biodiversidad de ofiuroideos (Echinodermata: Ophiuroidea) del talud de la Península de Yucatán, México Alicia Durán-González1 Alfredo Laguarda-Figueras1 Francisco Alonso Solís-Marín1 Adolfo Gracia2 Ana Rosa Vázquez-Bader2 1. Laboratorio de Sistemática y Ecología de Equinodermos, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad de México, México; [email protected], [email protected], [email protected] 2. Laboratorio Ecología Pesquera de Crustáceos, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad de México, México; [email protected], [email protected] Recibido 21-VI-2020. Corregido 11-IX-2020. Aceptado 20-IX-2020. ABSTRACT Biodiversity of ophiuroids (Echinodermata: Ophiuroidea) from the slope of the Yucatan Peninsula, Mexico Introduction: The Ophiuroidea class is the most diverse of the Phylum Echinodermata, with 2 064 described species, which can be found from intertidal zones to abyssal depths, but the fauna of Yucatan peninsula needs more study. Objective: To describe the diversity of ophiuroids in the Yucatan continental slope. Methods: Information was compiled from four oceanographic surveys carried out in August 2005, June 2007 (BIOREPES 1 and 2: BRP1 and BRP2), April 2011 and August 2014 (COBERPES 2 and 6: CBP2 and CBP6). The specimens were obtained by trawling with a shrimp net in soft substrates and with a skimmer-type trawl dredge at a depth range of 200 to 1 071 m off the states of Yucatán and Quintana Roo, Mexico. -
Behavior and Functional Morphology of Respiration in The
BEHAVIOR AND FUNCTIONAL MORPHOLOGY OF RESPIRATION IN THE BASKET STAR, GORGONOCEPHALUS EUCNEMIS AND TWO BRITTLE STARS IN THE GENUS OPHIOTHRIX. by MACKENNA A. H. HAINEY A THESIS Presented to the Department of Biology and the Graduate School of the University of Oregon in partial fulfillment of the requirements for the degree of Master of Science September 2018 THESIS APPROVAL PAGE Student: MacKenna A. H. Hainey Title: Behavior and Functional Morphology of Respiration in the Basket Star, Gorgonocephalus eucnemis and Two Brittle Stars in the Genus Ophiothrix This thesis has been accepted and approved in partial fulfillment of the requirements for the Master of Science degree in the Department of Biology by: Richard B. Emlet Advisor Alan L. Shanks Member Maya Watts Member and Janet Woodruff-Borden Vice Provost and Dean of the Graduate School Original approval signatures are on file with the University of Oregon Graduate School. Degree awarded September 2018 ii © 2018 MacKenna A. H. Hainey This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike (United States) License. iii THESIS ABSTRACT MacKenna A. H. Hainey Master of Science Department of Biology September 2018 Title: Behavior and Functional Morphology of Respiration in the Basket Star, Gorgonocephalus eucnemis and Two Brittle Stars in the Genus Ophiothrix Gorgonocephalus eucnemis, Ophiothrix suensonii and Ophiothrix spiculata are aerobic Echinoderms. Previous observations on the anatomy of these two genera state five pairs of radial shields and genital plates are responsible for regulating the position of the roof of the body disc and the flushing of water in and out of the bursae. -
Lower Kimmeridgian Comatulid Crinoids of the Holy Cross Mountains, Central Poland
Acta Geologica Polonica, Vol. 55 (2005), No.3, pp. 269-282 Lower Kimmeridgian comatulid crinoids of the Holy Cross Mountains, Central Poland URSZULA RADWANSKA Institute of Geology, University of Wm:mw, AI. Zwirki i WigUl)" 93; PL-02-089 Warszawa, Poland. E-mail: u.radwallska@ Ulv.edupl ABSTRACT: RADWANSKA, U. 2005. Lower Kimmeridgian comatulid crinoids of the Holy Cross Mountains, Central Poland. Acta Geologica Polonica, 55 (3), 269-282. Warszawa. An assemblage of feather stars or comatulids (free-living crinoids of the order Comatulida AH. CLI\RK, 1908) is reported for the first time from Upper Jurassic sequences of Poland, precisely from Lower Kimmeridgian strata of the Holy Cross Mountains. The major part of this assemblage comes from oolitic deposits exposed at Malogoszcz Quarry, others from oyster (Actinostreon, and Nanogyra) shellbeds higher up section at Malogoszcz, as well as from the coeval strata of the Karsy section. Taxonomically recognizable skeleton elements such as calyces, isolated een trodorsals and radials are here assigned to seven taxa, three of which are new to science: Comatulina malogoslialla sp.nov., Palaeocomaster learsensis sp.nov., and Solanocrinites sanctacruccnsis sp.nov. The majority of the material available was contained in burrows made by some ancestral stock of alpheid shrimp, closely comparable to those of present-day snapping shrimp (genus Alpheus WEBER, 1795), and its allies. These burrows, situated at the tops of oolitic shoals/banks at Malogoszcz, casually served both as habitats of cryptic faunas (mostly comatulids, dwarf-sized gastropods) and as preservational/taphonomic traps for others, primarily echinoderms (ten taxa of echinoids, three stalked crinoids, two ophiuroids, one asteroid) swept into by highly agitated waters, most likely during storms, to pro duce an Echinodermenlagerstdlte. -
Echinodermata of Lakshadweep, Arabian Sea with the Description of a New Genus and a Species
Rec. zool. Surv. India: Vol 119(4)/ 348-372, 2019 ISSN (Online) : 2581-8686 DOI: 10.26515/rzsi/v119/i4/2019/144963 ISSN (Print) : 0375-1511 Echinodermata of Lakshadweep, Arabian Sea with the description of a new genus and a species D. R. K. Sastry1*, N. Marimuthu2* and Rajkumar Rajan3 1Erstwhile Scientist, Zoological Survey of India (Ministry of Environment, Forest and Climate Change), FPS Building, Indian Museum Complex, Kolkata – 700016 and S-2 Saitejaswini Enclave, 22-1-7 Veerabhadrapuram, Rajahmundry – 533105, India; [email protected] 2Zoological Survey of India (Ministry of Environment, Forest and Climate Change), FPS Building, Indian Museum Complex, Kolkata – 700016, India; [email protected] 3Marine Biology Regional Centre, Zoological Survey of India (Ministry of Environment, Forest and Climate Change), 130, Santhome High Road, Chennai – 600028, India Zoobank: http://zoobank.org/urn:lsid:zoobank.org:act:85CF1D23-335E-4B3FB27B-2911BCEBE07E http://zoobank.org/urn:lsid:zoobank.org:act:B87403E6-D6B8-4ED7-B90A-164911587AB7 Abstract During the recent dives around reef slopes of some islands in the Lakshadweep, a total of 52 species of echinoderms, including four unidentified holothurians, were encountered. These included 12 species each of Crinoidea, Asteroidea, Ophiuroidea and eightspecies each of Echinoidea and Holothuroidea. Of these 11 species of Crinoidea [Capillaster multiradiatus (Linnaeus), Comaster multifidus (Müller), Phanogenia distincta (Carpenter), Phanogenia gracilis (Hartlaub), Phanogenia multibrachiata (Carpenter), Himerometra robustipinna (Carpenter), Lamprometra palmata (Müller), Stephanometra indica (Smith), Stephanometra tenuipinna (Hartlaub), Cenometra bella (Hartlaub) and Tropiometra carinata (Lamarck)], four species of Asteroidea [Fromia pacifica H.L. Clark, F. nodosa A.M. Clark, Choriaster granulatus Lütken and Echinaster luzonicus (Gray)] and four species of Ophiuroidea [Gymnolophus obscura (Ljungman), Ophiothrix (Ophiothrix) marginata Koehler, Ophiomastix elegans Peters and Indophioderma ganapatii gen et. -
Originally Published As
Originally published as: Schintgen, T. V., Förster, A. (2013): Geology and basin structure of the Trier-Luxembourg Basin - implications for the existence of a buried Rotliegend graben. - Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, 164, 4, p. 615-637(23). DOI: http://doi.org/10.1127/1860-1804/2013/0025 Geology and basin structure of the Trier–Luxembourg Basin – implications for the existence of a buried Rotliegend graben Tom Schintgen, Andrea Förster Published in: Z. Dt. Ges. Geowiss. 164 (4), 615–637. http://dx.doi.org/10.1127/1860-1804/2013/0025 Geology and basin structure of the Trier–Luxembourg Basin Abstract This paper presents the geology of the TrierLuxembourg Basin (TLB) in a comprehensive and updated manner. It describes the structural and lithological features of the basin, which comprises sediments of Permian to Mesozoic age. The regional geological assessment profited from recently published information on the geology and regional tectonics, as well as from borehole data from Luxembourg and adjoining areas in France, Belgium and Germany. The paper specifically focuses on the location of major synsedimentary faults and weakness zones, which gave rise to a new conceptual model of basin structure and evolution. The total depth of the basin as well as the thickness estimates of the fault-controlled subunits are supported by the interpretation of a Bouguer gravity map. In addition, the stratigraphy of the Cessange borehole and the depositional conditions of the Luxembourg Sandstone have been reinterpreted in accordance with the new concept. Supported by numerous geological cross sections it is suggested that the TLB has developed along a SW–NE trending weakness zone above a Permian Graben in direct prolongation of the Wittlicher Senke.