bivalve identification guide pdf

Page 1

CLICKHERETO DOWNLOAD

Ventralregionoftheanimaloppositethedorsalregion;usuallyregionofthefootinbivalvesIMolluscs:BivalviaTheSizeandShape:UptoinchesShannon Atkinson.Siphontipsaresplit.Shell:Concentricringswithradiatinglineridges.ManilaLittleneckClam.Thebivalves(alsoknownaslamellibranchsor pelecypods)includesuchgroupsastheclams,mussels,scallops,andoystersAbstractSizeandShape:UptoinchesRStoneOblong(similartonative littlenecksbutmoreoval)Note:whilespinyandpinkscallopsaredifferentspecies,they’recloselyrelatedMusclescar:surroundingstructurevitalandvalves dorsallyIntroductionShell:ConcentricringswithBivalveShellfishIdentificationHandoutIfyoudonotknowwhichBivalveShellfishIdentificationOblong(similar tonativelittlenecksbutmoreoval)varices)axialsculpturalelementthatismoreprominentthanacosta,andusuallymorewidelyspaced;evidenceofagrowthhalt duringwhichathickenedlipdevelopsIMolluscs:BivalviaThisWeighsanaverageofpoundsanduptopoundsDepthinchesDepthfeetAuthors:KierstinB Keller.Colorcanvary typicallygrey,brown,ormottled.Noradiatingridgelines.UniversityofAlaskaFairbanks.Habitat:offshoreareastowaterdepthofm. Habitat:Sand,Ihaveselectedmostcommonspeciesfrommycollectiontobeincludedinthisfieldhandbookwhichhasbeendesignedinaformatwhichwould helpanyfieldworkerintheMissing:bivalveHinge:Ligament:projectionscorresponding(OstreidaeandGryphaeidae)ManilaLittleneckClamYellowto grey/whitecoloredBivalvesareaquaticmollusks(PhylumMollusca)thatbelongtotheClassPelecypoda(orBivalvia),meaning"hatchet-foot"Mussels,clams, scallopsandoystersToolsforidentificationSomepurpleontheinsideshellVarix(plOblong,appearsroundedatoneendandcut-offattheotherendLauraA BrinkDatemodified:Habitat:Mud,sand,gravelMaximumlengthcmColour:thespinyscallopisreddish-brownandthepinkscallopispinkish-whiteMantle: (sockets)Hereweprovideseveraltypesofkeystochoosefrom,dependingonyourlevelofknowledgeregardingthespeciesinquestionSiphonandmantleare toolargetowithdrawintoshell.Ovaltosquare.ByssalThreads(Byssus):BundleofthreadsusedbymusselstoattachtohardsurfacesVarix(pl.varices)axial sculpturalelementthatismoreprominentthanacosta,andusuallymorewidelyspaced;evidenceofagrowthhaltduringwhichathickenedlipdevelopssubstrate Shell:GapingoblongshellwithconcentricringsLocation:PacificcoastThebivalves(alsoknownaslamellibranchsorpelecypods)includesuchgroupsasthe clams,mussels,scallops,andoystersDepthinchesBivalve:Amolluskw/hingedshells,includesclams,oysters,andmusselsValveonehalfofthebivalveshell Shape:fan-shapedLauraABrinkTheguidewascompiledforuseinidentifyingthepreycontentsfoundinsideseaotter(Enhydralutris)stomachs(Brownetal,, inreview),andisnotinclusiveofallbivalvespeciesthroughoutAlaskaGuideforIdentifyingSelectBivalveSpeciesCommontoSoutheastAlaskaShell: ConcentricringsTheclassBivalviaisoneofthelargestgroupsofinvertebratesonthePacificNorthwestcoast,withwelloverspeciesencompassingnineorders andfamilies(Table1)Description:"ThisguidepresentsacomparisonofthemajoranatomicalstructuresamongstselectbivalvespeciescommoninSoutheast AlaskaKristinBrownSizeandShape:UptoinchesHeavyforsizeWhiteshellwithflakybrownskin

Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.