B2015-04-Margry:Basteria-2015 9/16/2015 8:31 PM Page 17 Insulivitrina lamarckii (A. Férussac, 1821) (Gastropoda, Pulmonata, Vitrinidae) on the Canary Island of La Palma C.J.P.J.Margry Mozartlaan41,5283KBBoxtel,TheNetherlands;[email protected] (Groh&Valido,2000),andInsulivitrinasolemi(Ibáñez& Aspartofabroaderinvestigation,multipleplotson Alonso,2001).Inearlierpapersthelast-mentioned theislandofLaPalmawereinvestigatedforthepres- specieswaswronglylistedasVitrinalatebasisMousson, enceofVitrinidaespecies.Threespecieswereidenti- 1872,whichnameturnedouttobeajuniorsynonymof fiedoutof87shellsand19livespecimens.Nextto Insulivitrinablauneri(Shuttleworth,1852),aspeciesen- CanarivitrinataburientensisandInsulivitrinasolemi,In- demictoTenerife(Ibáñezetal.,2001:156). sulivitrinalamarckiiwasfoundaswell.Guerrinacutic- On6.v.2014,severalvitrinidsnailswerefoundat 17 ulawasnotrecorded.Thisisthefirstrecordfor twospotsintheBarrancodeLaZarza,alongtheshort InsulivitrinalamarckiionLaPalma. distancefootpathPRLP9.2betweenLaMataandDon Pedro(28˚48’39N–17˚54’27W).Someofthese Keywords:Vitrinidae,Plutonia,Insulivitrina,LaPalma, specimenscouldnotbeidentifiedasoneofthethree CanaryIslands,Spain. vitrinidspeciesmentionedabove.Inthispaper,theani- malsthatwerenotreadilyidentifiedarecompared withtheothercollectedVitrinidaespecimensandwith Introduction dataintheliterature. TheMacaronesianislandsMadeira,theAzoresandthe Methods CanariesarewellknownfortheirbiodiversityinVit- rinidae.Atotalnumberof35recentspecieswasde- SeverallocalitiesonLaPalmaweresampledforVit- scribedsince1821.Thesespecieshaveoftenbeen rinidaefrom25.iv.2014until8.v.2014.Table1andFig.1 classifiedinthegenusPlutoniaStabile,1864(Hesse, showwheretheemptyshellsandlivespecimensofVit- 1923,1924;Odhner,1937;Backhuys,1975;Groh& rinidaewerecollected.Thesamplingplotswerechosen Hemmen,1986;Ibáñezetal.,1987;Alonsoetal.,1987; atrandom.Livinganimalswerephotographedand Moralesetal.,1988;Validoetal.,1990,1993;Alonsoet conservedin70%alcohol.Threespecimensweredis- al.,2000;Validoetal.,2000;Mordan&Martins,2001; sected.Measurementsweretakenwithacallipertothe Ibáñezetal.,2001;Hausdorf,2002;Giustietal.,2011; nearest0.1mm.Defectiveshellswereonlycounted Validoetal.,2014). whentheycouldbeidentified.Genitalswerecompared Withinthescopeofamoregeneralinvestigationre- withdescriptionsanddrawingsinHesse(1923),Groh gardingVitrinidae(Margry,2013),theislandofLa &Hemmen(1986),Ibáñezetal.(1987),Alonsoetal. Palma(theCanaryIslands)wasvisitedinthespringof (1987),Moralesetal.(1988),Validoetal.(1990;1993), 2014.Ontheislandthreevitrinidspeciesarecurrently Alonsoetal.(2000),Mordan&Martins(2001),Ibáñezet recognized.AccordingtoGiustietal.(2011)these al.(2001)andGiustietal.(2011).Theterminologyof speciesbelongintodifferentgenera,viz.Guerrinacutic- thegenitalanatomyisthatusedbyGiustietal.(2011). ula(Shuttleworth,1852),Canarivitrinataburientensis Allspecimensarekeptinthecollectionoftheauthor. Basteria79(1-3):17-22(2015) B2015-04-Margry:Basteria-2015 9/16/2015 8:31 PM Page 18 No. numberofsampleincludingdate localityonLaPalma altitude(m) coordinates 1 20140426.2 ElPaso 842 28˚39’19N-17˚51’10W 2 20140428.2 ElPaso 830 28˚39’35N-17˚51’00W 3 20140429.1 ElCubodelaGalga 460 28˚45’42N-17˚46’31W 4 20140429.2 ElCubodelaGalga 660 28˚45’20N-17˚46’54W 5 20140429.3 ElCubodelaGalga 724 28˚45’24N-17˚46’46W 6 20140501.2 CumbreNueva 1124 28˚37’51N-17˚49’51W 7 20140502.2 BarrancodelasAngustias 320 28˚37’51N-17˚49’51W 8 20140504.2 LosTilos 526 28˚47’20N-17˚48’06W 9 20140504.3 LosTilos 687 28˚47’18N-17˚48’12W 10 20140504.4 LosTilos 703 28˚46’50N-17˚48’34W 11 20140504.5 LosTilos 774 28˚46’54N-17˚48’40W 12 20140506.1 BarrancodeLaZarza 919 28˚48’39N-17˚54’27W 13 20140506.2 BarrancodeLaZarza 831 28˚49’01N-17˚54’17W 14 20140506.3 BarrancodeLaZarza 910 28˚48’53N-17˚53’52W Table1.LocalitiesontheislandofLaPalmawithsamplingplots. strophostylcolumellaandthegenitals.Adetailed studyofthegenitalsshowed(i)thelargegladulaama- toriacomprisingtwo-thirdsofthelengthofthe vagina,(ii)itspadborderingtheopeningintothe atrium,(iii)thetypicalshapeofthepenis,and(iv)the presenceofapenialsheath(Figs4,5)(Hesse,1923: 134-135;Ibáñezetal.,1987:127-130;Giustietal.,2011: 312-315).Theshellandthejawofthelargestdissected specimenmeasured16.1and2.4mm,respectively. 18 Thebodyofthislargestspecimenmeasuredabout50 mm(alcoholmaterial),whereastheotherfourspeci- mensmeasured25–30mm.Insulivitrinasolemiwas identifiedonthebasisofthegenitalsandshellcharac- ters,viz.thepresenceofthetypicalradiatingribs,and wideanddeeppitsontheprotoconchasshownby Ibáñezetal.(2001).ShellsofC.taburientensislacked boththestrophostylcolumellaandtheribsonthepro- toconch. InsulivitrinalamarckiiwasfoundonlyintheLaurel forest(Perseo-LauretumAzoricae)inthegorgeofLa Zarza. Discussion and conclusions Fig.1.MapoftheislandofLaPalmawithlocalitiesofthe samplingplots. ThepresenceofInsulivitrinalamarckiiontheislandof laPalmahasnotbeenmentionedbefore.Odhner (1937)reportedVitrinalamarckiifromTenerife,La Results PalmaandtwootherCanaryIslands.Ibáñezetal. (1987)showed,however,thatthespecimensthat InTable2thenumber,measurementsandtheidentifi- OdhnerstudiedfromtheislandofLaPalmaandother cationoftheglasssnailsaregiven.Intotal,87shells CanaryIslandsbelongtodifferentspecies,whereas and19livespecimenswerecollected.Threespecies Insulivitrinalamarckiihastobeconsideredendemicon wereidentified.OfC.taburientensisonlyemptyshells Tenerife(Ibáñezetal.,1987). werefound.OfInsulivitrinasolemiandI.lamarckii(A. Themeasurementsoftheshellsofthethreespecies Férussac,1821)shellsandlivingspecimenswerecol- correspondwiththosegivenbyIbáñezetal.(1987), lected(Figs2,3).Insulivitrinalamarckiiwasidentified Alonsoetal.(1987)andIbáñezetal.(2001).Thedi- onthebasisofthelargesizeoftheshells,the mensionsofboththeshellandthejawofthelargest Basteria79(1-3),2015 B2015-04-Margry:Basteria-2015 9/16/2015 8:31 PM Page 19 Fig.2.(Above)Insulivitrinalamarckii(20140506.1.2a)fromLaZarza,LaPalma(photo:IngridMargry). 19 Fig.3.(Below)Insulivitrinasolemi(20140504.2.1b)fromLosTilos,LaPalma(photo:IngridMargry). Margry, C.J.P.J.–InsulivitrinalamarckiionLaPalma B2015-04-Margry:Basteria-2015 9/16/2015 8:31 PM Page 20 Canarivitrinataburientensis Insulivitrinasolemi Insulivitrinalamarckii number living livingglasssnails livingglasssnails shells shells (+numberof shells (+numberof glasssnails dissectedanimals) dissectedanimals) 15 2 1 20140426.2 2.1-8.7,6.2(15) 7.7-8.6,8.2(2) 3 2 20140428.2 5.7(1) 3 3 20140429.1 5 8.9-10.5,9.7(2) 22 4 20140429.2 3 3.5-9.6,6.9(21) 3 5 20140429.3 7.3-11.0,8.4(3) 1 1 6 20140501.2 (0) (0) 3 7 20140502.2 4.3-7.4,5.9(3) 12 2 8 20140504.2 7.3-9.5,8.4(12) (1) 2 9 20140504.3 1 8.5-10.0,9.2(2) 10 20140504.4 1 3 11 20140504.5 1 5.8-6.8,6.3(2) 6 4 5 12 20140506.1 3.3-8.0,6.4(4) 13.9-15.2,14.5(3) (2) 7 13 20140506.2 14.9-17.3,16.2(4) 20 14 20140506.3 1 22 54 11 Totalnumber 0 14 5 2.1-8.7,6.1(19) 3.3-11.0,7.6(48) 13.9-17.3,15.5(7) Table2.Overviewoftheshellsandlivingspecimensincludedinthecurrentresearch.Foreachsamplethenumbersoflivespecimens andshellsaregiven.Measurementsoftheshellsareinmm[min-max,themeanand(number)measured]. I.lamarckii(20140506.1.2a,Fig.2)werecomparedto Sofar,Guerrinacuticulawasconsideredtheonly thedataprovidedbyIbáñezetal.(1987)andHesse vitrinidsnaillivingontwoCanaryIslands,viz.both (1923:134),respectively.Thiscomparisonindicated TenerifeandLaPalma.Guerrinacuticulahascritical thatthespecimencanbeconsideredfully-grown.Al- demandsinrelationtoitsenvironmentandwilldisap- thoughI.lamarckiiissupposedtoshowagreatvari- pearwhenthisenvironmentisaffected,whereasI. abilityinbodycolour(Ibáñezetal.,1987),allfive lamarckiiismoretolerantandhaslessproblemswith specimensfromLaZarzawereratheruniformlyyel- theimpairmentoftheenvironment(Validoetal., lowishbrownwithdarkspotsonthetailandmantle 2000).MorestudiesonVitrinidaewillclarifytowhat andadarkstripeabovethepneumostome. extentI.lamarckiiisamorecommonspeciesontheCa- ThepresenceofI.lamarckiionLaPalmaisdifficult naryIslandofLaPalma. toexplain.Thislargeandeasilyrecognizablespecies isabsentfromearlierstudies.Arecentintroduction Acknowledgements intotheLaurelforestisratherunlikely.Probablythis specieswasnotfoundearlierbecauseofthedense TheauthorisgratefultobothProf.Dr.EdiGitten- vegetationinthenortherngorges,whichmakessome bergerandDr.TondeWinterofNaturalisBiodiver- oftheLaPalmaterrainhardtoexplore.Forthefirst sityCenter,andTheoRipkenandJoopEikenboomfor recordofanumberofotherspecies,arecentintroduc- theprovisionofliterature.Iamalsogratefultomy tionseemstobemoreobvious(Topley,2005;Margry, wifeIngridforbothherhelpduringthefieldworkand 2015). thephotography. 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