DOCSLIB.ORG

Decapoda, Thalassinidea, Axiidae

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Decapoda, Thalassinidea, Axiidae TWOSYMP ATRICSPECIES OF AXIUS FROMTHE NORTH-WEST ATLANTIC(DECAPODA, THALASSINIDEA, AXIIDAE) BY BRIAN KENSLEY 1/ Departmentof SystematicBiology, National Museum of NaturalHistory, Smithsonian Institution, Washington,D.C. 20560,U.S.A. ABSTRACT Axiusserratus Stimpson,1852, is redescribed and illustrated, and its distribution based on 54 recordsof 68 specimensis recorded. The sympatric, and rarely recorded Axiusarmatus Smith,1881, isredescribed and illustrated for the rsttime, based on six female specimens from veseparate records.These two species are compared with the eastern Atlantic Axiusstirhynchus Leach,1815. Thethree species can be separated on the basis of the uropodal transverse suture, telsonic and pereopodalspination, and pereopod 4 sternitestructure. RÉSUMÉ Axiusserratus Stimpson,1852 est redé crit et illustréet saré partition gé ographique est donné e, àpartirde 54 signalements de 68 spé cimens. L ’espèce sympatrique Axiusarmatus Smith,1881, rarementrencontré e, est redé crite et illustrée pourla premiè re fois, à partirde sixindividus femelles provenantde cinq stations sé paré es. Ces deux espè ces sont comparé es avec Axiusstirhynchus Leach, 1815,de l’ Atlantiqueoriental. Les trois espè ces peuvent ê trediffé rencié es par la suture transversale del’uropode, les é pinesdu telsonet des pé ré iopodes et en n lastructuredu sternitedu pé ré iopode 4. INTRODUCTION Thegeminate species Axius serratus Stimpson,1852, in the north-western Atlantic, and Axius stirhynchus Leach,1815, in the north-easternAtlantic, are bothlong-established, fairly frequentlyrecorded species. Thata third species of Axius occursin the western NorthAtlantic is oftenoverlooked. In fact, Axius armatus Smith, 1881,has onlybeen mentioned three times in the literature since its description,and has neverbeen illustrated. Thelast mention(Sakai &De Saint Laurent,1989) questioned its positionin the genus Axius.Sixspecimens 1/ e-mail:[email protected] c KoninklijkeBrill NV ,Leiden,2001 Crustaceana 74(9):951-962 ° 952 BRIAN KENSLEY (all females) ofthis species havebeen deposited in the collections ofthe National Museumof Natural History,includingone of Smith’ s syntypes.It was thought useful to ll this gapin the knowledgeof the east coast U.S.shelf fauna,and to describe andillustrate the twowestern NorthAtlantic species, anddocument their distribution. Theholdings of A. serratus in the SmithsonianInstitution, as well as those ofthe Museumof ComparativeZoology, Harvard (most ofwhich were collected byvarious NOAA National Marine Fisheries Service programs)were examined,on the off-chancethat specimens ofthe apparentlyrare A. armatus had beenmisidenti ed. Unfortunately, no furtherspecimens werefound. Abbreviations:cl, carapacelength (posterior orbital marginto posterior cara- pacemargin); MCZ,Museum of Comparative Zoology, Harvard University; NOAA,National Oceanicand Atmospheric Agency; USNM, United States Na- tional Museum,Smithsonian Institution; VIMS,Virginia Institute ofMarine Sci- ences. SYSTEMATICS Axius armatus Smith, 1881( gs. 1, 2,4) Axiusarmatus Smith,1881: 433; De Man, 1925: 3, 9,11. ?Calocaride Sakai& DeSaint Laurent, 1989: 101. Materialexamined. — Syntype,USNM 35391, cl13.2 mm (eggspresent in ovaries), R/ V“Fish Hawk”sta. 878, off Martha’ s Vineyard,Massachusetts, 39 ±550N 70±5401500W,260m, 13 September 1880.— USNM 174450,ovigerous cl8.1mm (damaged),off South Carolina, 32 ±300N 78±290W, 218m, coll. K. Shaw,6 June1978. — USNM 174451, cl6.2 mm, offSouth Carolina, 32 ±300N 78±290W,218m, coll. K. Shaw,6June1978. — USNM 243489,2 cl5.6mm, 6.9mm, R/V“Fish Hawk”sta. 949, off Martha’ s Vineyard,Massachusetts, 40 ±030N 70±310W,183m, 23 August 1881. —USNM 306381, cl7.0 mm, George’s Bank,40 ±2201200N 68±3001200W,108m, R/ V“Oceanus” cruiseM10, sta. 12, 13 November1983. Description.— Female syntype.Carapace ( gs. 1A, B, 2A) with rostrum reachingto distal edgeof antennularpeduncle article 2,armedwith 3to 6teeth (4in 3specimens), posteriormost in supraocularposition, but not enlarged, rostral marginproduced posteriorly as nelateral carina; submediancarina aneridge anteriorly recurved,lacking teeth; mediancarina bearing2 or3 teeth (3in one specimen),unarmed posterior to tubercle.Sternal plate betweenbases ofpereopods 4(g. 2C) with lateral angerounded. Abdominal pleura ( g. 1C) ventrally broadlyrounded, that ofabdominal somite 2broadest.Telson ( g. 1D)about 1.5 times longerthan basal width; lateral margins with 4serrations, posterior margin convex,with small spine at midpoint;dorsal surface with 3spines onleft half,2 on right..
Load more

Recommended publications
  • The Role of Neaxius Acanthus
    Wattenmeerstation Sylt The role of Neaxius acanthus (Thalassinidea: Strahlaxiidae) and its burrows in a tropical seagrass meadow, with some remarks on Corallianassa coutierei (Thalassinidea: Callianassidae) Diplomarbeit Institut für Biologie / Zoologie Fachbereich Biologie, Chemie und Pharmazie Freie Universität Berlin vorgelegt von Dominik Kneer Angefertigt an der Wattenmeerstation Sylt des Alfred-Wegener-Instituts für Polar- und Meeresforschung in der Helmholtz-Gemeinschaft In Zusammenarbeit mit dem Center for Coral Reef Research der Hasanuddin University Makassar, Indonesien Sylt, Mai 2006 1. Gutachter: Prof. Dr. Thomas Bartolomaeus Institut für Biologie / Zoologie Freie Universität Berlin Berlin 2. Gutachter: Prof. Dr. Walter Traunspurger Fakultät für Biologie / Tierökologie Universität Bielefeld Bielefeld Meinen Eltern (wem sonst…) Table of contents 4 Abstract ...................................................................................................................................... 6 Zusammenfassung...................................................................................................................... 8 Abstrak ..................................................................................................................................... 10 Abbreviations ........................................................................................................................... 12 1 Introduction ..........................................................................................................................
    [Show full text]
  • Taphonomy of Decapod-Bearing Concretions and Their Associated
    Volumen 77 (3): REVISTA DE LA DESARROLLOS RECIENTES EN ICNOLOGÍA ARGENTINA ASOCIACIÓN GEOLÓGICA ARGENTINA www.geologica.org.ar Septiembre 2020 Taphonomy of decapod-bearing concretions and their associated trace fossils from the Agrio Formation (Lower Cretaceous, Neuquén Basin), with paleobiological implications for axiid shrimps A. Mariel ANDRADA1, Graciela S. BRESSAN1,2 and Darío G. LAZO1,2 1Instituto de Estudios Andinos “Don Pablo Groeber”, Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. 2CONICET E-mails: [email protected], [email protected], [email protected] Editor: Diana E. Fernández Recibido: 7 de julio de 2020 Aceptado: 14 de septiembre de 2020 ABSTRACT A total of 22 concretions containing 37 decapod crustacean specimens belonging to the family Axiidae, from the Hauterivian (Lower Cretaceous) of the Agrio Formation in the Neuquén Basin, were studied. The decapods were assigned to Protaxius sp., which likely had a fossorial life habit. In this work we attempt to determine, through taphonomic analysis, if the specimens fossilized within their burrows or outside them in order to interpret paleobiological aspects of the studied taxon. Several taphonomic criteria of the specimens and concretions, known from the literature, were applied and their utility discussed, including anatomical disposition, completeness of specimens, orientation and alignment, dispersion of exoskeletal elements in the concretion, preservation of both chelae, sedimentary fabric of the concretion, position within the concretion, and shape of the concretions. The relative importance of these criteria was discussed especially in those concretions with conflicting evidence pointing to either fossilization within or outside burrow systems.
    [Show full text]
  • Invertebrate ID Guide
    11/13/13 1 This book is a compilation of identification resources for invertebrates found in stomach samples. By no means is it a complete list of all possible prey types. It is simply what has been found in past ChesMMAP and NEAMAP diet studies. A copy of this document is stored in both the ChesMMAP and NEAMAP lab network drives in a folder called ID Guides, along with other useful identification keys, articles, documents, and photos. If you want to see a larger version of any of the images in this document you can simply open the file and zoom in on the picture, or you can open the original file for the photo by navigating to the appropriate subfolder within the Fisheries Gut Lab folder. Other useful links for identification: Isopods http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-33/htm/doc.html http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-48/htm/doc.html Polychaetes http://web.vims.edu/bio/benthic/polychaete.html http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-34/htm/doc.html Cephalopods http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-44/htm/doc.html Amphipods http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-67/htm/doc.html Molluscs http://www.oceanica.cofc.edu/shellguide/ http://www.jaxshells.org/slife4.htm Bivalves http://www.jaxshells.org/atlanticb.htm Gastropods http://www.jaxshells.org/atlantic.htm Crustaceans http://www.jaxshells.org/slifex26.htm Echinoderms http://www.jaxshells.org/eich26.htm 2 PROTOZOA (FORAMINIFERA) ................................................................................................................................ 4 PORIFERA (SPONGES) ............................................................................................................................................... 4 CNIDARIA (JELLYFISHES, HYDROIDS, SEA ANEMONES) ............................................................................... 4 CTENOPHORA (COMB JELLIES)............................................................................................................................
    [Show full text]
  • Distribution of Decapod Crustacea Off Northeastern United States Based on Specimens at the Northeast Fisheries Center, Woods Hole, Massachusetts
    NOAA Technical Report NMFS Circular 407 Distribution of Decapod Crustacea Off Northeastern United States Based on Specimens at the Northeast Fisheries Center, Woods Hole, Massachusetts Austin B. Williams and Roland L. Wigley December 1977 U.S. DEPARTMENT OF COMMERCE Juanita M, Kreps, Secretary National Oceanic and Atmospheric Administrati on Richard A. Frank, Administrator National Marine Fisheries Service Robert W, Schoning, Director The National Marine Fisheries Service (NMFS) does not approve, rec­ ommend or endorse any proprietary product or proprietary material mentioned in this publication. No reference shall be made to NMFS, or to this publication furnished by NMFS, in any advertising or sales pro­ motion which would indicate or imply that NMFS approves, recommends or endorses any proprietary product or proprietary material mentioned herein, or which has as its purpose an intent to cause directly or indirectly the advertised product to be used or purchased because of this NMFS publication. '0. TE~TS IntroductIOn .... Annotated heckli, t A knowledgments Literature cited .. Figure l. Ranked bathymetrIc range of elected Decapoda from the nort hat ('rn l mt d 2. Ranked temperature range of elected Decapoda from the nort hea tern Table 1. A ociation of elected Decapoda with ix type, of ub. trat III Distribution of Decapod Crustacea ff orth rn United States Based on Specimens at th o t Fisheries Center, Woods HoI, a a hu AI)."II.'H.\ ILLIA~1.· AndH)[' J) r,. \\ j( LE,'1 AB,"I RA CI DiHlributional and l'n\ ironmrntal ummane are gl\rn In an .wno by ('hart , graph, and table, for 1:11 P(>('l(> of mannr d(>"apod l ru \II( INTROD TI N This report presents distrihutl!ll1al data for l:n species of manne dpcapod rrustacea (11 Pena idea, t 1 raridea.
    [Show full text]
  • Two Sympatric Species of Axius from the North-West
    TWOSYMP ATRICSPECIES OF AXIUS FROMTHE NORTH-WEST ATLANTIC(DECAPODA, THALASSINIDEA, AXIIDAE) BY BRIAN KENSLEY 1/ Departmentof SystematicBiology, National Museum of NaturalHistory, Smithsonian Institution, Washington,D.C. 20560,U.S.A. ABSTRACT Axiusserratus Stimpson,1852, is redescribed and illustrated, and its distribution based on 54 recordsof 68 specimensis recorded. The sympatric, and rarely recorded Axiusarmatus Smith,1881, isredescribed and illustrated for the rsttime, based on six female specimens from veseparate records.These two species are compared with the eastern Atlantic Axiusstirhynchus Leach,1815. Thethree species can be separated on the basis of the uropodal transverse suture, telsonic and pereopodalspination, and pereopod 4 sternitestructure. RÉSUMÉ Axiusserratus Stimpson,1852 est redé crit et illustréet saré partition gé ographique est donné e, àpartirde 54 signalements de 68 spé cimens. L ’espèce sympatrique Axiusarmatus Smith,1881, rarementrencontré e, est redé crite et illustrée pourla premiè re fois, à partirde sixindividus femelles provenantde cinq stations sé paré es. Ces deux espè ces sont comparé es avec Axiusstirhynchus Leach, 1815,de l’ Atlantiqueoriental. Les trois espè ces peuvent ê trediffé rencié es par la suture transversale del’uropode, les é pinesdu telsonet des pé ré iopodes et en n lastructuredu sternitedu pé ré iopode 4. INTRODUCTION Thegeminate species Axius serratus Stimpson,1852, in the north-western Atlantic, and Axius stirhynchus Leach,1815, in the north-easternAtlantic, are bothlong-established,
    [Show full text]
  • Decapoda: Axiidea: Axiidae) Obtained in the Laboratory
    Zootaxa 3527: 83–87 (2012) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA Copyright © 2012 · Magnolia Press Article ISSN 1175-5334 (online edition) urn:lsid:zoobank.org:pub:FB53427E-2668-4863-BBB5-BAAAC906EA0E First stage larva of the lobster shrimp Allaxius princeps (Boas, 1880) (Decapoda: Axiidea: Axiidae) obtained in the laboratory ELENA S. KORNIENKO* & OLGA M. KORN A.V. Zhirmunsky Institute of Marine Biology, Far East Branch, Russian Academy of Sciences, 17 Pal’chevskogo Street, 690059, Vlad- ivostok, Russia. E-mail: [email protected]; [email protected] *corresponding author Abstract First stage larva of the lobster shrimp Allaxius princeps (Boas, 1880) (Decapoda: Axiidea: Axiidae) obtained from the ovigerous female is described and illustrated for the first time. It is the first description of the larva of lobster shrimp from West Pacific. Zoea I of A. princeps is characterized by the presence of four dorsal spines on the pleonal somites 2–5 and by the shape of the telson with a deep cleft but without a median process. Under these characters, zoea I of A. princeps is similar to the first larva of Axiopsis serratifrons. Key words: Axiidea, Axiidae, Allaxius, larva, zoea, Peter the Great Bay, Sea of Japan Introduction Axiidean shrimps are seldom caught with the traditional fishing gears. Therefore, their reproduction biology, especially the larval life, has been given little attention so far. Axiidae represent the family with the fewest known larvae; the larvae of the family Callianassidae are the best known (Pohle et al. 2011). At present, the family Axiidae comprises 108 species (De Grave et al.
    [Show full text]
  • Crustacea, Decapoda, Axiidae)
    Memoirs of the Museum of Victoria 54: 79-120 (1994) A PHYLOGENY OF THE FAMILIES OF THALASSINIDEA (CRUSTACEA: DECAPODA) WITH KEYS TO FAMILIES AND GENERA BY GARY C. B. POORE Department of Crustacea, Museum of Victoria, 71 Victoria Crescent, Abbotsford, Victoria 3067, Australia Abstract Poore, G.C.B., 1994. A phytogeny of the families of Thalassinidea (Crustacea: Decapo- da) with keys to families and genera. Memoirs of the Museum of Victoria 54: 79-120. The confused taxonomy of the Thalassinidea (73 genera recognised here) is briefly reviewed. States of 93 characters are discussed with reference to five outgroup genera of reptant decapods. The linea thalassinica is concluded to be homologous with the linea anomurica of Anomura. Its loss in Axioidea is thought secondarily derived. Burrowing behav­ iour in callianassoids is coincident with loss of the interaction between the posterior margin of the carapace and anterolateral lobes on abdominal somite 1, and with loss of abdominal pleura. Characters from gills, mouthparts and pereopods are discussed. Pereopodal spiniform setae are a unifying feature of some axioids. Auxiliary surfaces on the margins of pleopods of Callianidea and Michelea are not homologous. Setal-rows, once thought to unite several genera into the CalUanideidae are shown to be more widespread and this family, as previ­ ously conceived, to be polyphyletic. A computer-aided phylogenetic analysis of the families, represented by 22 genera, has confirmed the monophyly of the infraorder, based largely on the unique possession of a setose lower margin to pereopod 2, The Thalassinidea are divided into three superfamilies: Thalassinoidea and Callianassoidea, more closely related to each other than to Axioidea.
    [Show full text]
  • Axioidea of the World and a Reconsideration of The
    Axioidea of the World and a Reconsideration of the Callianassoidea (Decapoda, Thalassinidea, Callianassida) CRUSTACEANA MONOGRAPHS constitutes a series of books on carcinology in its widest sense. Contri- butions are handled by the Series Editor(s) and may be submitted through the office of KONINKLIJKE BRILL Academic Publishers N.V., P.O. Box 9000, NL-2300 PA Leiden, The Netherlands. Series Editors for the current volume: J.C. VON VAUPEL KLEIN, P.O. Box 30, NL-3720 AA Bilthoven, The Netherlands; e-mail: [email protected] and C.H.J.M. FRANSEN, c/o National Museum of Natural History, P.O. Box 9517, NL-2300 RA Leiden, The Netherlands; e-mail: [email protected] Editorial Committee: N.L. BRUCE, Wellington, New Zealand; Mrs. M. CHARMANTIER-DAURES, Mont- pellier, France; Mrs. D. DEFAYE, Paris, France; H. DIRCKSEN, Stockholm, Sweden; J. FOREST,Paris, France; R.C. GUIA¸SU, Toronto, Ontario, Canada; R.G. HARTNOLL,PortSt.Mary,IsleofMan; E. MACPHERSON, Blanes, Spain; P.K.L. NG, Singapore, Rep. of Singapore; H.-K. SCHMINKE,Old- enburg, Germany; F.R. SCHRAM, Langley, WA, U.S.A.; G. VA N D E R VELDE, Nijmegen, Netherlands; H.P. WAGNER, Leiden, Netherlands; D.I. WILLIAMSON, Port Erin, Isle of Man. Published in this series: CRM 001 - Stephan G. Bullard Larvae of anomuran and brachyuran crabs of North Carolina CRM 002 - Spyros Sfenthourakis et al. The biology of terrestrial isopods, V CRM 003 - Tomislav Karanovic Subterranean Copepoda from arid Western Australia CRM 004 - Katsushi Sakai Callianassoidea of the world (Decapoda, Thalassinidea) CRM 005 - Kim Larsen Deep-sea Tanaidacea from the Gulf of Mexico CRM 006 - Katsushi Sakai Upogebiidae of the world (Decapoda, Thalassinidea) CRM 007 - Ivana Karanovic Candoninae (Ostracoda) from the Pilbara region in Western Australia CRM 008 - Frank D.
    [Show full text]
  • St. Georges Bay Fish Harvesters' Ecological Knowledge and White Hake (Urophycis Tenius) Predation on Juvenile American Lobster (Homarus Americanus)
    St. Georges Bay Fish Harvesters’ Ecological Knowledge and White Hake (Urophycis tenuis) Predation on Juvenile American Lobster (Homarus americanus): Comparative Analysis of Research Results SRSF Research Report #7 Prepared by Hadley Watts, Holli MacPherson, Anthony Davis, and Mark Hanson in Collaboration with Fisheries and Oceans Canada, Gulf Region Gulf Nova Scotia Bonafide Fishermen’s Association Social Research for Sustainable Fisheries (SRSF) at St. Francis Xavier University February 2003 Summary of Findings White hake (Urophycis tenuis) is a demersal fish species that inhabits the nearshore waters of the Southern Gulf of St. Lawrence (sGSL). Recently, many St. Georges Bay fishermen have expressed concern that the white hake is a predator of juvenile American lobster (Homarus americanus). Standard research surveys do not support these concerns. Fishermen maintain that these surveys were conducted at inappropriate sampling times and locations. To address these concerns, a multiphase collaborated study was developed where groundfish were sampled in St. Georges Bay during a time of year and in locations selected by fishermen. Six sampling sites covering two depth zones of 15-30 and 30-40 meters were sampled with gillnets. A total of 3452 groundfish stomachs were collected, including 3093 of white hake. American lobster were identified in the stomachs of Atlantic cod and shorthorn sculpin, and not in the stomachs of white hake. This research has significantly increased our knowledge of the feeding habits of groundfish in St. Georges Bay. It has shown that incorporating fish harvesters’ ecological knowledge will enhance the design and conduct of research aimed at exploring groundfish ecology. It has also demonstrated the willingness for fish harvesters to engage enthusiastically, and to share their knowledge in a study that is inclusive, sincere, and respectful.
    [Show full text]
  • Invertebrate Identification Guide for Chesmmap and NEAMAP Diet Analysis Studies
    W&M ScholarWorks Reports 11-13-2013 Invertebrate Identification Guide for ChesMMAP and NEAMAP Diet Analysis Studies Chesapeake Bay Multispecies Monitoring and Assessment Program Follow this and additional works at: https://scholarworks.wm.edu/reports Part of the Marine Biology Commons Recommended Citation Chesapeake Bay Multispecies Monitoring and Assessment Program. (2013) Invertebrate Identification Guide for ChesMMAP and NEAMAP Diet Analysis Studies. Virginia Institute of Marine Science, William & Mary. https://doi.org/10.25773/b0y5-k411 This Report is brought to you for free and open access by W&M ScholarWorks. It has been accepted for inclusion in Reports by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. 11/13/13 1 This book is a compilation of identification resources for invertebrates found in stomach samples. By no means is it a complete list of all possible prey types. It is simply what has been found in past ChesMMAP and NEAMAP diet studies. A copy of this document is stored in both the ChesMMAP and NEAMAP lab network drives in a folder called ID Guides, along with other useful identification keys, articles, documents, and photos. If you want to see a larger version of any of the images in this document you can simply open the file and zoom in on the picture, or you can open the original file for the photo by navigating to the appropriate subfolder within the Fisheries Gut Lab folder. Other useful links for identification: Isopods http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-33/htm/doc.html
    [Show full text]
  • Decapoda, Axiidea, Callichiridae)
    bioRxiv preprint doi: https://doi.org/10.1101/2020.09.21.307249; this version posted September 22, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. 1 Integrative taxonomy reveals hidden species within the western Atlantic 2 Callichirus major s. l. (Decapoda, Axiidea, Callichiridae) 3 4 Patricio Hernáez1,2, Marcel S. Miranda3, Juliana P. P. Rio1 & Marcelo A.A. Pinheiro1 5 6 1 Grupo de Pesquisa em Biologia de Crustáceos—CRUSTA, Instituto de Biociências, Campus do Litoral 7 Paulista, Universidade Estadual Paulista—UNESP, Praça Infante Dom Henrique, s/nº, Parque Bitarú, 8 CEP 11330-900, São Vicente, SP, Brazil. E-mail: PH, [email protected]; MAAP, 9 [email protected]; JPPR, [email protected] 10 2 Centro de Estudios Marinos y Limnológicos, Facultad de Ciencias, Universidad de Tarapacá (UTA), Av. 11 General Velásquez 1775, Arica, Chile. 12 3 Programa de Pós-Graduação em Biologia Animal, Universidade Estadual de Campinas, CEP 13083-970, 13 Campinas, SP, Brazil. E-mail: [email protected] 14 15 Corresponding author: Patricio Hernáez, [email protected] 16 17 Running title: A new species of Callichirus from the southwestern Atlantic 18 19 Orcid: Patricio Hernáez, https://orcid.org/0000-0002-3785-2050; Marcel S. Miranda, 20 https://orcid.org/0000-0002-9594-6426; Juliana P. P. Rio, https://orcid.org/0000-0002- 21 8195-3596; Marcelo A. A. Pinheiro, https://orcid.org/0000-0003-0758-5526 22 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.09.21.307249; this version posted September 22, 2020.
    [Show full text]
  • Decapod Crustaceans in the Nova Scotia Museum Collection
    Curatorial Report Number 32 Nova Scotia Museum 1747 Summer Street Halifax. Nova Scotia.Carada l Decapod } Crustaceans in the Nova Scotia Museum Collection By Don Aldous July 1976 r 1 Curatorial Report Number 32 Nova Scotia Museum 1747 Summer Street Decapod Halifax, Nova Scotia, Canada Crustaceans in the Nova Scotia Museum Collection By Don Aldous July 1976 NOVA SCOTIA MUSEUM Curatorial Reports The Curatorial Reports of the Nova Scotia Museum contain information on the collections and the preliminary results of research projects carried out under the program of the museum. The reports may be cited in publications but their manuscript status should be clearly indicated. 1 INTRODUCTION The Crustacean order Decapoda is divided into five infraorders: Penaeidea (penaeidean shrimp) Caridea (caridean shrimp) Astacidea (lobsters) Anomura (mud shrimp) Brachyura (true crabs) This follows the classification of Glaessner (1969) in Gasner (1971). As the name suggests, decapods have ten thoracic legs or pereiopods. Besides these there are three pairs of maxillipeds associated with feeding, a pair of mandibles as jaws, maxillae as accessory mouth organs, antennae as "feelers" and antennules containing the chemoreceptors. The abdomen is composed of six segments and a tail p1ece called the telson. Although no anomurans or brachyurans are pelagic in the adult stage, members of the other infraorders may be found in any environment in the ocean. As a group, the decapods have varied feeding habits. Some are scavengers, picking up what they can from the ocean floor with their claws while a few are more inclined to capture live prey. Still others passively fan plankton or detritus into their mouths.
    [Show full text]