DOCSLIB.ORG

Systematics, Zoogeography, Evolution and Biodiversity of Antarctic Deep-Sea Isopoda (Crustacea: Malacostraca)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Systematics, Zoogeography, Evolution and Biodiversity of Antarctic Deep-Sea Isopoda (Crustacea: Malacostraca) Systematics, zoogeography, evolution and biodiversity of Antarctic deep-sea Isopoda (Crustacea: Malacostraca) Dissertation zur Erlangung des Doktorgrades des Fachbereichs Biologie der Universität Hamburg vorgelegt von Wiebke Brökeland aus Essen Hamburg 2005 Our knowledge can only be finite, while our ignorance must necessarily be infinite. Karl Raimund Popper According to ICZN article 8.3 all names and nomenclatural acts in this thesis are disclaimed for nomenclatural purposes. Table of contents Summary..................................................................................................................................... i 1 Introduction............................................................................................................................ 1 1.1 The deep sea................................................................................................................................. 1 1.2 The Southern Ocean ................................................................................................................... 2 1.3 Deep-sea Isopoda......................................................................................................................... 3 1.4 Aims and questions ..................................................................................................................... 5 2 Material and Methods ............................................................................................................ 6 2.1 Sampling ...................................................................................................................................... 6 2.2 Taxonomy .................................................................................................................................... 8 2.3 Biodiversity analysis ................................................................................................................... 9 2.4 Phylogenetic methods ................................................................................................................. 9 3 Results................................................................................................................................... 11 3.1 Taxonomy .................................................................................................................................. 11 3.1.1 Family Ischnomesidae Hansen, 1916 .............................................................................................. 11 3.1.1.1 Genus Stylomesus Wolff, 1956.................................................................................................. 11 3.1.1.1.1 Stylomesus hexapodus n. sp. ............................................................................................... 11 3.1.1.2 Genus Haplomesus Richardson, 1908...................................................................................... 20 3.1.1.2.1 Haplomesus corniculatus n. sp............................................................................................ 20 3.1.2 Family Haploniscidae Hansen, 1916 ............................................................................................... 29 3.1.2.1 Intraspecific variability of characters ..................................................................................... 35 3.1.2.2 Genus Antennuloniscus Menzies, 1962.................................................................................... 38 3.1.2.2.1 Antennuloniscus ornatus Menzies, 1962............................................................................. 39 3.1.2.2.2 Antennuloniscus armatus Menzies, 1962............................................................................ 50 3.1.2.2.3 Antennuloniscus latoperculus n. sp..................................................................................... 59 3.1.2.3 Genus Mastigoniscus Lincoln, 1985a....................................................................................... 68 3.1.2.3.1 Mastigoniscus polygomphios n. sp...................................................................................... 69 3.1.2.3.2 Mastigoniscus andeepi n. sp. .............................................................................................. 79 3.1.2.3.3 Mastigoniscus pseudoelegans n. sp..................................................................................... 90 3.1.2.3.4 Mastigoniscus sp. A ............................................................................................................ 98 3.1.2.3.5 Mastigoniscus sp. B .......................................................................................................... 105 3.1.2.4 Genus Haploniscus Richardson, 1908 ................................................................................... 113 3.1.2.4.1 Haploniscus cassilatus n. sp. ............................................................................................ 113 3.1.2.4.2 Haploniscus cucullus n. sp................................................................................................ 122 3.1.2.4.3 Haploniscus weddellensis n. sp......................................................................................... 130 3.1.2.4.4 Haploniscus procerus n. sp. .............................................................................................. 136 3.1.2.4.5 Haploniscus kyrbasius n. sp.............................................................................................. 142 3.1.2.4.6 Haploniscus nudifrons n. sp. ............................................................................................ 149 3.1.2.4.7 Haploniscus microkorys n. sp. .......................................................................................... 153 3.1.2.5 Genus Chauliodoniscus Lincoln, 1985a................................................................................. 161 3.1.2.6 Genus Hydroniscus Hansen, 1916.......................................................................................... 161 3.2 Biodiversity and zoogeography.............................................................................................. 162 3.3 Phylogeny of the Haploniscidae ............................................................................................. 168 3.3.1 Taxa used in the analysis................................................................................................................ 168 3.3.2 Characters used in the analysis ..................................................................................................... 170 3.3.3 Parsimony analysis ......................................................................................................................... 175 4 Discussion........................................................................................................................... 184 4.1 Taxonomy ................................................................................................................................ 184 4.1.1 Family Ischnomesidae .................................................................................................................... 184 4.1.1.1 Neoteny in the family Ischnomesidae.................................................................................... 184 4.1.2 Family Haploniscidae..................................................................................................................... 185 4.1.2.1 General remarks ..................................................................................................................... 185 4.1.2.2 Intraspecific variability .......................................................................................................... 187 4.1.2.2.1 Variability without relation to sex or age...................................................................... 187 4.1.2.2.2 Sexual dimorphism ......................................................................................................... 187 4.1.2.2.3 Ontogenetic variability ................................................................................................... 188 4.2 Biodiversity and Zoogeography............................................................................................. 190 4.2.1. Isopod diversity and community patterns ................................................................................... 190 4.2.2. Zoogeography ................................................................................................................................192 4.2.2.1 Distribution patterns within the family Haploniscidae ....................................................... 193 4.2.3 Problems affecting the quantitative analysis of epibenthic-sledge samples............................... 194 4.3 Phylogeny................................................................................................................................. 197 4.3.1 Characters and taxa used in the analysis...................................................................................... 197 4.3.1.1 Characters ............................................................................................................................... 197 4.3.1.1.1 Character weighting, coding and polarity .................................................................... 209 4.3.1.2 Taxa and missing data............................................................................................................ 210 4.3.2 Topology and tree data..................................................................................................................
Load more

Recommended publications
  • Changes in Species Composition of Haploniscidae (Crustacea Isopoda)
    Progress in Oceanography 180 (2020) 102233 Contents lists available at ScienceDirect Progress in Oceanography journal homepage: www.elsevier.com/locate/pocean Changes in species composition of Haploniscidae (Crustacea: Isopoda) across T potential barriers to dispersal in the Northwest Pacific ⁎ Nele Johannsena,b, Lidia Linsa,b,c, Torben Riehla,b, Angelika Brandta,b, a Goethe University, Biosciences, Institute for Ecology, Evolution und Diversity, Max-von-Laue-Str. 13, 60438 Frankfurt am Main, Germany b Senckenberg Research Institute and Natural History Museum, Marine Zoology, Senckenberganlage 25, 60325 Frankfurt am Main, Germany c Ghent University, Marine Biology Research Group, Krijgslaan 281/S8, 9000 Ghent, Belgium ARTICLE INFO ABSTRACT Keywords: Speciation processes as drivers of biodiversity in the deep sea are still not fully understood. One potential driver Hadal for species diversification might be allopatry caused by geographical barriers, such as ridges or trenches, or Ecology physiological barriers associated with depth. We analyzed biodiversity and biogeography of 21 morphospecies of Sea of Okhotsk the deep-sea isopod family Haploniscidae to investigate barrier effects to species dispersal in the Kuril- Deep sea Kamchatka Trench (KKT) area in the Northwest (NW) Pacific. Our study is based on 2652 specimens from three Abyssal genera, which were collected during the German-Russian KuramBio I (2012) and II (2016) expeditions as well as Isopoda Kuril Kamchatka Trench the Russian-German SokhoBio (2015) campaign. The sampling area covered two potential geographical barriers Distribution (the Kuril Island archipelago and the Kuril-Kamchatka Trench), as well as three depth zones (bathyal, abyssal, Northwest Pacific hadal). We found significant differences in relative species abundance between abyssal and hadal depths.
    [Show full text]
  • Zootaxa, Haplomesus (Crustacea: Isopoda: Ischnomesidae)
    Zootaxa 1120: 1–33 (2006) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA 1120 Copyright © 2006 Magnolia Press ISSN 1175-5334 (online edition) Heterochrony in Haplomesus (Crustacea: Isopoda: Ischnomesidae): revision of two species and description of two new species FIONA A. KAVANAGH1, GEORGE D. F. WILSON2 & ANNE MARIE POWER1 1 Department of Zoology, National University of Ireland, Galway, Ireland. [email protected] 2 Australian Museum, 6 College Street, Sydney, NSW 2010, Australia. [email protected] Abstract Two new species of Ischnomesidae, Haplomesus celticensis sp. nov. and Haplomesus hanseni sp. nov. are described from the southwest of Ireland and the Argentine Basin respectively. Both species lack the expression of pereopod VII, a characteristic that we argue is produced by progenesis, not neoteny as suggested by Brökeland & Brandt (2004). Haplomesus angustus Hansen, 1916 and Haplomesus tropicalis Menzies, 1962, also lack pereopod VII and are revised from the type material. The original description of Haplomesus angustus Hansen, 1916 describes the adult type specimen as a juvenile; the original description of Haplomesus tropicalis Menzies, 1962 fails to mention the lack of pereopod VII. Progenesis is discussed for the above species and within the family Ischnomesidae as a whole. Key words: Isopoda, Asellota, Ischnomesidae, Haplomesus, heterochrony, progenesis Introduction The Ischnomesidae is a family of marine benthic asellote isopods found mostly at bathyal and abyssal depths, with records from about 250–7000 m (Wolff 1962; Kussakin 1988). To date, 99 species have been described in five genera. The known diversity of this family, however, is increasing owing to recent reports of several new species (e.g.
    [Show full text]
  • REVISÃO TAXONÔMICA DA FAMÍLIA SEROLIDAE Dana, 1853 (CRUSTACEA: ISOPODA) NO OCEANO ATLÂNTICO (45°N – 60°S)
    UNIVERSIDADE DE SÃO PAULO MUSEU DE ZOOLOGIA PROGRAMA DE PÓS-GRADUAÇÃO EM SISTEMÁTICA, TAXONOMIA ANIMAL E BIODIVERSIDADE INGRID ÁVILA DA COSTA REVISÃO TAXONÔMICA DA FAMÍLIA SEROLIDAE Dana, 1853 (CRUSTACEA: ISOPODA) NO OCEANO ATLÂNTICO (45°N – 60°S) São Paulo 2017 UNIVERSIDADE DE SÃO PAULO MUSEU DE ZOOLOGIA PROGRAMA DE PÓS-GRADUAÇÃO EM SISTEMÁTICA, TAXONOMIA ANIMAL E BIODIVERSIDADE INGRID ÁVILA DA COSTA REVISÃO TAXONÔMICA DA FAMÍLIA SEROLIDAE Dana, 1853 (CRUSTACEA: ISOPODA) NO OCEANO ATLÂNTICO (45°N – 60°S) Tese apresentada ao Programa de Pós-Graduação em Sistemática, Taxonomia Animal e Biodiversidade do Museu de Zoologia da Universidade de São Paulo. Versão corrigida Orientador: Prof. Dr. Marcos Domingos Siqueira Tavares São Paulo 2017 Não autorizo a reprodução e divulgação total ou parcial deste trabalho, por qualquer meio convencional ou eletrônico. I do not authorize the reproduction and dissemination of this work in part or entirely by any means electronic or conventional. i FICHA CATALOGRÁFICA Costa, Ingrid Ávila da Revisão taxonômica da família Serolidae Dana, 1853 (Crustacea: Isopoda) no Oceano Atlântico (45ºN – 60ºS). Ingrid Ávila da Costa; orientador Marcos Domingos Siqueira Tavares. – São Paulo, SP: 2017. 36 fls. Tese (Doutorado) – Programa de Pós-graduação em Sistemática, Taxonomia Animal e Biodiversidade, Museu de Zoologia, Universidade de São Paulo. Versão corrigida 1. Serolidae Dana, 1853 - taxonomia. 2. Isopoda – Oceano Atlântico. I. Tavares, Marcos Domingos Siqueira (Orient.). II. Título. Banca examinadora Prof. Dr.______________________ Instituição: ___________________ Julgamento: ___________________ Assinatura: ___________________ Prof. Dr.______________________ Instituição: ___________________ Julgamento: ___________________ Assinatura: ___________________ Prof. Dr.______________________ Instituição: ___________________ Julgamento: ___________________ Assinatura: ___________________ Prof. Dr.______________________ Instituição: ___________________ Julgamento: ___________________ Assinatura: ___________________ Profa.
    [Show full text]
  • The Lower Bathyal and Abyssal Seafloor Fauna of Eastern Australia T
    O’Hara et al. Marine Biodiversity Records (2020) 13:11 https://doi.org/10.1186/s41200-020-00194-1 RESEARCH Open Access The lower bathyal and abyssal seafloor fauna of eastern Australia T. D. O’Hara1* , A. Williams2, S. T. Ahyong3, P. Alderslade2, T. Alvestad4, D. Bray1, I. Burghardt3, N. Budaeva4, F. Criscione3, A. L. Crowther5, M. Ekins6, M. Eléaume7, C. A. Farrelly1, J. K. Finn1, M. N. Georgieva8, A. Graham9, M. Gomon1, K. Gowlett-Holmes2, L. M. Gunton3, A. Hallan3, A. M. Hosie10, P. Hutchings3,11, H. Kise12, F. Köhler3, J. A. Konsgrud4, E. Kupriyanova3,11,C.C.Lu1, M. Mackenzie1, C. Mah13, H. MacIntosh1, K. L. Merrin1, A. Miskelly3, M. L. Mitchell1, K. Moore14, A. Murray3,P.M.O’Loughlin1, H. Paxton3,11, J. J. Pogonoski9, D. Staples1, J. E. Watson1, R. S. Wilson1, J. Zhang3,15 and N. J. Bax2,16 Abstract Background: Our knowledge of the benthic fauna at lower bathyal to abyssal (LBA, > 2000 m) depths off Eastern Australia was very limited with only a few samples having been collected from these habitats over the last 150 years. In May–June 2017, the IN2017_V03 expedition of the RV Investigator sampled LBA benthic communities along the lower slope and abyss of Australia’s eastern margin from off mid-Tasmania (42°S) to the Coral Sea (23°S), with particular emphasis on describing and analysing patterns of biodiversity that occur within a newly declared network of offshore marine parks. Methods: The study design was to deploy a 4 m (metal) beam trawl and Brenke sled to collect samples on soft sediment substrata at the target seafloor depths of 2500 and 4000 m at every 1.5 degrees of latitude along the western boundary of the Tasman Sea from 42° to 23°S, traversing seven Australian Marine Parks.
    [Show full text]
  • (Janiridae, Isopoda, Crustacea), a Second Species of Austrofilius in the Mediterranean Sea, with a Discussion on the Evolutionary Biogeography of the Genus J
    Austrofilius MAJORICENSIS SP. NOV. (JANIRIDAE, ISOPODA, CRUSTACEA), A SECOND SPECIES OF AUSTROFILIUS IN THE MEDITERRANEAN SEA, WITH A DISCUSSION ON THE EVOLUTIONARY BIOGEOGRAPHY OF THE GENUS J. Castelló To cite this version: J. Castelló. Austrofilius MAJORICENSIS SP. NOV. (JANIRIDAE, ISOPODA, CRUSTACEA), A SECOND SPECIES OF AUSTROFILIUS IN THE MEDITERRANEAN SEA, WITH A DISCUS- SION ON THE EVOLUTIONARY BIOGEOGRAPHY OF THE GENUS. Vie et Milieu / Life & Environment, Observatoire Océanologique - Laboratoire Arago, 2008, pp.193-201. hal-03246157 HAL Id: hal-03246157 https://hal.sorbonne-universite.fr/hal-03246157 Submitted on 2 Jun 2021 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. VIE ET MILIEU - LIFE AND ENVIRONMENT, 2008, 58 (3/4): 193-201 AUSTROFILIUS MAJORICENSIS SP. NOV. (JANIRIDAE, ISOPODA, CRUSTACEA), A SECOND SPECIES OF AUSTROFILIUS IN THE MEDITERRANEAN SEA, WITH A DISCUSSION ON THE EVOLUTIONARY BIOGEOGRAPHY OF THE GENUS J. CASTELLÓ Departament de Didàctica de les Ciències Experimentals i de la Matemàtica, Universitat de Barcelona, Passeig de la Vall d’Hebron 171, 08035 Barcelona, Spain [email protected] ISOPODA Abstract. – A new species of Janiroidean isopod, Austrofilius majoricensis sp. nov., from ASELLOTA JANIRIDAE Majorca (Balearic Islands, Western Mediterranean), is described.
    [Show full text]
  • Crustacea, Malacostraca)*
    SCI. MAR., 63 (Supl. 1): 261-274 SCIENTIA MARINA 1999 MAGELLAN-ANTARCTIC: ECOSYSTEMS THAT DRIFTED APART. W.E. ARNTZ and C. RÍOS (eds.) On the origin and evolution of Antarctic Peracarida (Crustacea, Malacostraca)* ANGELIKA BRANDT Zoological Institute and Zoological Museum, Martin-Luther-King-Platz 3, D-20146 Hamburg, Germany Dedicated to Jürgen Sieg, who silently died in 1996. He inspired this research with his important account of the zoogeography of the Antarctic Tanaidacea. SUMMARY: The early separation of Gondwana and the subsequent isolation of Antarctica caused a long evolutionary his- tory of its fauna. Both, long environmental stability over millions of years and habitat heterogeneity, due to an abundance of sessile suspension feeders on the continental shelf, favoured evolutionary processes of “preadapted“ taxa, like for exam- ple the Peracarida. This taxon performs brood protection and this might be one of the most important reasons why it is very successful (i.e. abundant and diverse) in most terrestrial and aquatic environments, with some species even occupying deserts. The extinction of many decapod crustaceans in the Cenozoic might have allowed the Peracarida to find and use free ecological niches. Therefore the palaeogeographic, palaeoclimatologic, and palaeo-hydrographic changes since the Palaeocene (at least since about 60 Ma ago) and the evolutionary success of some peracarid taxa (e.g. Amphipoda, Isopo- da) led to the evolution of many endemic species in the Antarctic. Based on a phylogenetic analysis of the Antarctic Tanaidacea, Sieg (1988) demonstrated that the tanaid fauna of the Antarctic is mainly represented by phylogenetically younger taxa, and data from other crustacean taxa led Sieg (1988) to conclude that the recent Antarctic crustacean fauna must be comparatively young.
    [Show full text]
  • Deep Sea Isopods from the Western Mediterranean: Distribution and Habitat
    University of Texas Rio Grande Valley ScholarWorks @ UTRGV Earth, Environmental, and Marine Sciences Faculty Publications and Presentations College of Sciences 10-2020 Deep Sea Isopods from the western Mediterranean: distribution and habitat Joan E. Cartes Diego F. Figueroa The University of Texas Rio Grande Valley Follow this and additional works at: https://scholarworks.utrgv.edu/eems_fac Part of the Earth Sciences Commons, Environmental Sciences Commons, and the Marine Biology Commons Recommended Citation Cartes, Joan E., and Diego F. Figueroa. 2020. “Deep Sea Isopods from the Western Mediterranean: Distribution and Habitat.” Progress in Oceanography 188 (October): 102415. https://doi.org/10.1016/ j.pocean.2020.102415. This Article is brought to you for free and open access by the College of Sciences at ScholarWorks @ UTRGV. It has been accepted for inclusion in Earth, Environmental, and Marine Sciences Faculty Publications and Presentations by an authorized administrator of ScholarWorks @ UTRGV. For more information, please contact [email protected], [email protected]. 1 Deep Sea Isopods from the western Mediterranean: distribution and habitat. 2 3 4 5 Joan E. Cartes1, Diego F. Figueroa2 6 7 1Institut de Ciències del Mar, ICM-CSIC, P/Marítim de La Barceloneta, 37-49, 08003 Barcelona, Spain 8 9 2School of Earth, Environmental, and Marine Sciences, University of Texas Rio Grande Valley, 10 Brownsville, Texas, 78520, USA 11 13 Abstract. Isopods are a highly diversified group of deep-sea fauna, with a wide variety of shapes which 14 must reflect a similar great variety of adaptations to the deep environments. The deep Mediterranean, 15 however, has a low diversity of isopods related to its oligotrophy, the thermal stability of deep-water 16 masses (~12.8 °C below 150 ˗ 200 m) and rather homogeneous geomorphology.
    [Show full text]
  • Marine Benthic Populations in Antarctica: Patterns and Processes
    FOUNDATIONS FOR ECOLOGICAL RESEARCH WEST OF THE ANTARCTIC PENINSULA ANTARCTIC RESEARCH SERIES , VOLUME 70, PAGES 373-388 MARINE BENTHIC POPULATIONS IN ANTARCTICA: PATTERNS AND PROCESSES Andrew Clarke British Antarctic Survey. High Cross, Madingley Road, Cambridge eB3 OET. U.K. Sampling difficulties have meant that there have been more studies of population patterns than of proc­ esses in Antarctic benthos, but a number of generalizations can be made. Benthic marine invenebrates in Antarctica have species/abundance relationships similar to those found in temperate or tropical regions but, several striking examples of gigantism notwithstanding. most species are small. Diversity is generally high, particularly in comparison with the Arctic, although some taxa (for example molluscs) are low in diversity when compared with temperate or tropicaJ faunas. Most species produce larger eggs than related non-polar species, and embryonic development is typically slow. Although the Southern Ocean contains fewer taxa reproducing by feeding pelagic larvae than elsewhere, such larvae are by no means absent. Somewhat paradoxically, these larvae are often released in winter. Post-juvenile growth rates are typically slow, and recruitment rates are slow and episodic. The low temperature slows many biological processes, but other fac­ tors are also involved. Ice is an irnponant factor in many biological processes, and the recently described sub-decadal variability in the e"tent of winter sea-ice is likely to e"ert a profound influence on benthic ceo- 10gica1 processes in Antarctica. I, INTRODUCTION 2_ ECOLOGICAL PATfERNS It has long been traditional in ecology to draw a distinc­ 2_1. Ecological PaJtems in Antarctic Benthos: Species Size tion between the study of pattern and process.
    [Show full text]
  • New Cheloniellid Arthropod with Large Raptorial Appendages from the Silurian of Wisconsin, USA
    bioRxiv preprint doi: https://doi.org/10.1101/407379; this version posted September 7, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. New cheloniellid arthropod with large raptorial appendages from the Silurian of Wisconsin, USA Andrew J. Wendruff1*, Loren E. Babcock2, Donald G. Mikulic3, Joanne Kluessendorf4 1 Department of Biology and Earth Science, Otterbein University, Westerville, Ohio, United States of America, 2 Department of Earth Sciences, The Ohio State University, Columbus, Ohio, United States of America, 3 Illinois Geological Survey, Champaign, Illinois, United States of America, 4 Weis Earth Science Museum, University of Wisconsin-Fox Valley, Menasha, Wisconsin, United States of America *[email protected] Abstract Cheloniellids comprise a small, distinctive group of Paleozoic arthropods of whose phylogenetic relationships within the Arthropoda remain unresolved. A new form, Xus yus, n. gen, n. sp. is reported from the Waukesha Lagerstatte in the Brandon Bridge Formation (Silurian: Telychian), near Waukesha, Wisconsin, USA. Exceptionally preserved specimens show previously poorly known features including biramous appendages; this is the first cheloniellid to show large, anterior raptorial appendages. We emend the diagnosis of Cheloniellida; cephalic appendages are uniramous and may include raptorial appendages; trunk appendages are biramous. bioRxiv preprint doi: https://doi.org/10.1101/407379; this version posted September 7, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.
    [Show full text]
  • Drilonereis Pictorial
    Pleurogoniumsp A SCAMIT 1995 SCAMIT Vol. 14, No. 6 Isopoda: Paramunnidae SCAMIT CODE: None Date Examined: January 1993 Voucher By: Don Cadien SYNONYMY: Pleurogonium californiense (in part) aucct. Pleurogonium sp A Wilson MS Pleurogonium sp A SCAMIT 1993 LITERATURE: Menzies, R.J. 1951. New marine isopods, chiefly from Northern California, with notes on related forms. Proceedings of the United States National Museum 101(3273): 105-156 Menzies, R. J. & Barnard, J. L. 1959. Marine Isopoda of coastal shelf bottoms of Southern California - systematics and ecology. Pacific Naturalist l(ll):3-35. Sars, G. O. 1897. Isopoda. Part V, VI Idotheidae, Arcturidae, Asellidae, Ianiridae, Munnidae. Bergen, Norway: Bergen Museum (An Account of the Crustacea of Norway with Short Descriptions and Figures of All the Species; 11:78-117 Wason,G.D.F.(MS 1992). Taxonomic Atlas of the Benthic Fauna of the Santa Maria Basin and Western Santa Barbara Channel. Volume NN: The Isopoda, Part 2 Suborder Asellota: NN.2-1 - NN.2-55 DIAGNOSTIC CHARACTERS: 1. antennulae with large curved anterolateral projection on distal margin 2. cuticle on body and limbs rough with apparent microscaling on all surfaces 3. lateral margins of pereonal segments without spines or serrations; coxae each bearing a posterolateral spine RELATED SPECIES AND CHARACTER DIFFERENCES: 1. Differs from Pleurogonium californiense in having a large anterolateral projection of the distal margin of the first antennular article, and in having a coarsely scaled cuticle microstructure 2. Differs from Pleurogonium rubicundum in having no spinelike marginal tubercle on the pereonal segments, and in bearing a large posterolateral spine on the coxae of the pereonites and pleonites 3.
    [Show full text]
  • Isopoda, Munnopsidae) from Icelandic Waters
    vol. 35, no. 2, pp. 361–388, 2014 doi: 10.2478/popore−2014−0013 Two new species of the genus Eurycope (Isopoda, Munnopsidae) from Icelandic waters Sarah SCHNURR1* and Marina V. MALYUTINA2 1 Senckenberg am Meer, German Center for Marine Biodiversity Research (DZMB), c/o Biocentrum Grindel, Martin−Luther−King−Platz 3, 20146 Hamburg, Germany <[email protected]> 2 A.V. Zhirmunsky Institute of Marine Biology FEB RAS, Palchevsky Str, 17, 690041, Far East Federal University, Oktiabrskaya Str, 29, 690600, Vladivostok, Russia <[email protected]> * corresponding author Abstract: Collections of munnopsid isopods of the BIOICE (Benthic Invertebrates of Ice− landic Waters; 1991–2004) and the IceAGE1 (Icelandic Marine Animals: Genetics and Ecology; since 2011) expeditions included ten species of the genus Eurycope G.O. Sars, 1864, thereof are two species new to science. Thus, the descriptions of the two new species are presented herein. Eurycope elianae sp. n. is distinguished from the other species of the genus mainly by two long, slightly robust, simple setae on the tip of the rostrum in combina− tion with the size and shape of the rostrum itself. E elianae sp. n. shares the presence of two long, slightly robust, simple seta on the tip of the rostrum with E. tumidicarpus. The shape of the rostrum itself is more similar to E. inermis and species of the E. complanata complex. E. aculeata sp. n. is characterized by possessing dorsomedial acute projections on pereo− nites 5–7, which is unusual for the genus. E. aculeata sp. n. is most similar to E. cornuta. Both new species are, so far, known only from localities south of the Greenland−Scotland Ridge.
    [Show full text]
  • Isopoda, Asellota, Janiridae) from Korean Waters
    Anim. Syst. Evol. Divers. Vol. 37, No. 2: 146-153, April 2021 https://doi.org/10.5635/ASED.2021.37.2.006 Short communication Description of Janiralata sagamiensis (Isopoda, Asellota, Janiridae) from Korean Waters Sung Hoon Kim1, Seong Myeong Yoon2,3,* 1Division of Ocean Sciences, Korea Polar Research Institute, Incheon 21990, Korea 2Department of Biology, College of Natural Sciences, Chosun University, Gwangju 61452, Korea 3Educational Research Group for Age-associated Disorder Control Technology, Graduate School, Chosun University, Gwangju 61452, Korea ABSTRACT Janirid isopod, Janiralata sagamiensis Shimomura, 2006 is newly reported from Korean waters. This species can be distinguishable from its congeners by the following characteristics: the cephalon has a distinct anterolateral projection on the anterolateral margin; the frontal margin of the cephalon is lacking rostrum; the coxal plates are visible in dorsal view; the pleotelson is rounded distally without a posterolateral point; the first pleopod of the male has a pair of protrusions distally; the third pleopodal exopod is lacking plumose setae. In this paper, the detailed description and illustrations of the species are provided with a key to known Janiralata species in the surrounding waters of Korea, including China and Japan. Keywords: Janiralata, Janiridae, isopods, morphology, Korea INTRODUCTION ralata species have been known, including single record from Korea: J. chuni (Thielemann, 1910) from Japan; J. koreaensis The Janiralata Menzies, 1951, comprising 32 species, is the Jang, 1991 from Korea; J. sagamiensis Shimomura, 2006 third largest genus after the Jaera Leach, 1814 and Janira from Japan; J. shiinoi Kussakin, 1962 from the East China Leach, 1814 among 30 genera of the family Janiridae G.
    [Show full text]