Five new Barleeia species (Caenogastropoda, Rissooidea) from the islands of the Gulf of Guinea (West Africa)

2014·5.1 MB·English

by  Rolán, Emilio

B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 39
Five new Barleeia species (Caenogastropoda, Rissooidea)
from the islands of the Gulf of Guinea (West Africa)
Emilio Rolán
MuseodeHistoriaNaturaloftheUniversity,ParqueVistaAlegre,CampusNorte,E-15782SantiagodeCompostela,Spain;
[email protected]
Sandro Gori
ViaSernesi7,I-57123Livorno,Italia;[email protected] 39
Tomlin&Shackleford,1915.Then,Rolán&Templado(1994)
NewmaterialofthegenusBarleeiafromtheislandsofthe describedanadditionalspeciesfromSãoToméIslandand
GulfofGuineaisstudied,andfivenewspeciesarede- Gofas(1995)madearevisionofthisfamilyintheWest
scribed.Comparisonismadewithpreviouslyknown Africancoast,describing14newspecies.Sincethisrevision,
speciesfromthisandadjacentareas. onlyRolán&Swinnen(2004)describedanewspeciesfrom
SeestudianuevomaterialdelgéneroBarleeiaprocedentede PríncipeIslandandRolán&Hernández(2006)referredto
lasislasdelGolfodeGuinea,describiendo5nuevasespe- thetaxonBarleeiaminusculaMonterosato,1889,fromMo-
cies.Sehacecomparacióndelasmismasconotrasespecies rocco,MauritaniaandSenegal.
previamenteconocidasdeláreadeestudioypróximas. DuringrecenttripstoSãoToméIslandsampleswerecol-
lectedinMinerio(northoftheisland)bybrushingstones
Keywords:Gastropoda,Barleeidae,taxonomy,GulfofGuinea. andfromsediments.Asaresultseveralmorphsofbarleeids
werefound.Thestudyofthismaterialistheobjectofthe
presentwork,whichalsoincludesmaterialcollectedinAn-
Introduction nobónIslandduringatripmadein2000.
Abbreviations,collections:MHNS=MuseodeHistoria
VeryfewspeciesofthefamilyBarleeidaeGray,1857,were NaturaldelaUniversidad,SantiagodeCompostela;MNCN
knownuptotheendoflastcenturyintheislandsofthe =MuseoNacionaldeCienciasNaturales,Madrid;MNHN=
GulfofGuinea,theoldestonebeingTropidorissoiataphrodes Muséumnationald’Histoirenaturelle,Paris;CSG=private
Basteria78(1-3):39-47(2014)
B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 40
collnSandroGori,Livorno,Italia;CPR=privatecollnPeter
Ryall,MariaRain,Austria.Indescriptions:f=fragment;
H/W=height/widthratio;j=juvenile;s=shellempty;sp=
shellwithsoftparts.
Systematic part
BarleeiaClark,1853
Barleeiamulticolorspec.nov.
(Figs1C-L,3A-I,5A-H,6A-D,8A-C,8E-H)
Typematerial.–Holotype:MNHN(25872,sp,Figs1C,3A).Paratypes:
MNHN(25873,10sp;15.05/60089,10sp,Figs1D-E,3B-C);MHNS(100596,
150sp,s);CSG(50s).Allfromthetypelocalityandwithwhiteshells.
Othermaterialexamined.–Morethan100sp,sandj(MHNS)from
thewhiteform;morethan500ofthebrownform(Figs1F-G)(MHNS);
c.100banded(Figs1K-L)andc.120lightbrown-orange(FigsH-J)
(MHNS).
Typelocality.–Minerio,00º23'016"N,06º46'228"E,NofSão
40 ToméI.,in35-41m,RepublicofSãoToméandPríncipe.
Description.–Shellconical,dome-shaped,smooth,and
solid.Protoconchwithanucleusofabout80µm,1¼whorls
andadiameterofabout330µm.Itscolouristhesameofthe
shell,andthemicrosculptureisformedby5-6spiralcords
thatbeginafterthenucleus,andhaveveryminuteperfora-
tionsformingspirallines(about22-25rows).Attheendof Fig.1A-L.BarleeidaefromSãoToméandPríncipe.A-B,Barleeialindae
theprotoconchthereisashortsmoothpart.Theteleoconch Rolán&Swinnen,2004.A,holotype,1.7mm(MMF),B,paratype,1.9
hasbetween3and4almostflatwhorls,whichclearlyin- mm(MHNS),IlheuBombom,PríncipeI.C-L,Barleeiamulticolorspec.
creaseindiameter;itssurfaceissmooth.Thesutureis nov.C,holotype,1.9mm(MNHN);D-E,paratypes(whiteform),1.7,
prominentbutnotdeep.Aperturenearlyovoidwithafine 1.6mm(MNCN);F-G,shell(brownform),1.9,1.9mm(MHNS);H-J,
peristome,whichisincontactwiththepreviouswhorlonly shells(lightbrown),1.9,2.0,1.7mm(MHNS);K-L,shells(banded
forashortdistanceandformsaprominentumbilicus,thatis form),1.9,1.8mm(MHNS),allfromMinerio,35m,SãoToméIsland.
sometimesalittleelongate.Thecolouriswhiteintheholo-
typeandparatypes.Othershellsincludedinthistaxonhave
differentcolours(darkbrown,lightbrownororange)and prominentlamella;lateraltoothwitharatherbroadbase,
sometimesbrownbands. andwitharatherprominentcuspflankedby3smaller,one
Radula(Figs8A-C)typicalofthegenus,witharachidian internallyandtwoexternally;theinnermarginalwithfive
toothpresentinginthecuttingedgeawiderectangular cuspsandtheexternaloneelongateandnarrowwithfew
4 5 6
cusp,andtwosmallcuspsateachside;thereisasharpbasal cusps.
denticleoneachside,bothseparatedbyabroad,hardly Operculum(Figs8E-H)brown,strongandwithapromi-
Basteria78(1-3)
B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 41
Comparison.–Gofas(1995)usedthegenusPseudodiala
Ponder,1967,toincludethreespeciesfromtheWestAfrican
coast.Thecharactersofthisgenusare:“...narrowlyumbili-
cate,generallywhite;spirewhorlsratherflat,bodywhorl
withafaintperipheralkeel...Radula:centralcuspwith
blunttip...”Ourspecimensarenotinconcordancewiththis
genericdescription.Thereisnoperipheralkeel,theumbili-
cusisnotnarrow,thecolourisvariableandtheradulais
typicalofaBarleeia,withawidemediumcuspintherachid-
iantooth.Themicrosculptureoftheprotoconchissimilarin
thepresentcase,butmoreattenuatedinotherspecieswhich
aredescribedbelow.Forthesereasonswehavepreferredto
keepthisspeciesinthegenusBarleeia.
Anotherproblemthatwehadwiththisspeciesisthe
presenceof4colourmorphs,viz.totallywhite,totallydark
brown,brownwithbands,andlightbrown-orange.Except
forthelastonethatcouldshowsomeintergradationswith
thebrownmorph,theotherswereconsistentincolourand
nointermediateswereobserved.Thecomparisonoftheop-
erculum,radula,andmicrosculptureoftheprotoconchofall
specimensshowedagreatsimilarityandforthisreasonwe
concludedthattheyareallconspecific.Thetypematerial 41
waschosenamongthosewithwhitemorph.
BarleeiatomensisGofas,1995,andB.taeniolataGofas,
1995,arealsofoundinSãoToméinshallowwater;their
shellslackanumbilicusandtheprotoconchlacksspiral
cords,whilethecolouredbandsareconstantanddifferin
Fig.2A-B.Barleeiatranslucensspec.nov.A,holotype,1.7mm(MNHN); shapefromthoseofthenewspecies,whenatallpresent.
B,paratype,1.5mm(MNCN),bothfromMinerio,41m,SãoToméIs- BarleeialindaeRolán&Swinnen,2006,isarathersimilar
land.C-D,Barleeiaproceraspec.nov.C,holotype,2.9mm(MNHN);D, species,collectedinPríncipe,butthatshellistransparent
paratype,2.8mm(MNCN),bothfromAnnobón.E-H,Barleeiafuscaexi- andthebrownbandsareconsistentlydifferentfromthoseof
guaspec.Nov.E,holotype,1.7mm(MNHN);F-H,paratypes,1.8,1.7, thenewspecies.Besides,theperforationsoftheprotoconch
1.8mm(MHNS),Annobón.I-J,Barleeiaalbicolorspec.nov..I,holotype, aremoreregularanddistributedinrowsandcolumns,that
1.2mm(MNHN);J,paratype,1.3mm,Annobón(MNCN). arebetterappreciableinlateralview.
Etymology.–Thespecificnamereferstothegreatvari-
abilityinthecolouroftheshell.
nentinternalcusp.
Dimensions:theholotypeis1.9mm. Barleeiatranslucensspec.nov.
Distribution.–KnownfromSãoTomé,onrocks,in35-41m. (Fig.2A-B,4A,5I-J,6H,8I-J)
Habitat.–Mostofthelivecollectedmaterialwasfound
insedimentsobtainedbybrushingstoneswithcalcareous Typematerial.–Holotype:MNHN(25874,s;Fig.2A).Paratypes:
algaeat35m. MNCN(15.05/60090,1s;Figs2B,4A);MHNS(100597,20sp,10j,10s),
Rolán, E. & Gori, S.–FivenewBarleeiaspecies
B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 42
CSG(1sp,2j,2s). fromPríncipenotfromSãoTomé,isverysimilar,butthe
Othermaterialexamined.–5spweredestroyedtostudytheradula. protoconchhasaslightlylargerdiameter,itsprotoconch
perforationsareperfectlyaligned(Fig.6E-G),thebrown
Typelocality.–Minerio,00º23'016"N,06º46'228"E,NofSão bandsarealittlewider,whereasthereisnobandinthemid-
Tomé,in41m,RepublicofSãoToméandPríncipe. dleofthewhorls,andtheshellislesstransparent.Thedif-
Description.–Shellconical,dome-shaped,rathersolid ferenceinthebandinganditsdistributionisconstantin
andshiny.Protoconchwithanucleusofabout90µm,1¼ manyhundredsofshellsexamined.
whorlsandadiameterofabout290µm.Itscolouristhe Etymology.–Thespecificnamereferstothetrans-
sameastheshell,andthemicrosculptureisformedby6 parencyoftheshell.
muchattenuatedspiralcordsthatbeginafterthenucleus
andhaveveryminuteperforationsirregularlydisposed.At Barleeiaproceraspec.nov.
theendoftheprotoconchthereisashortsmoothpart.The (Figs2C-D,4B,7A-B)
teleoconchhasbetween3and4almostflatwhorlswhich
clearlyincreaseindiameter;itssurfaceissmooth.Thesu- Typematerial.–Holotype:MNHN(25875,s;Fig.2C).Paratypes:
tureisprominentbutnotdeep.Aperturenearlyovoidwith MNCN(15.05/60091,1s;Figs2D,4B);MHNS(100598,25s),CSG(3s),
afineperistome,whichisincontactwiththepreviouswhorl CPR(3s).
onlyforashortlengthandformsaprominentumbilicus, Othermaterialexamined.–About50s,fandjfromthetypelocality.
whichissometimesalittleelongate.Theshellistransparent
withaveryfine,red-brown,subsuturalspiralband,another Typelocality.–SanAntoniodePalé,insedimentsat2-3m,
oneinthemiddleofthewhorl,athirdoneonthelastwhorl AnnobónI.,EquatorialGuinea,intheGuineanGulf.
ascontinuationofthesuture,andfinallyanother,smaller Description.–Shellconical,verysolid.Dome-shaped
42 onearoundtheumbilicus. protoconchwith1¼whorls,withadiameterof400µm,the
Radula(Figs8D)verysimilartothatofBarleeia nucleuswithabout200µm,coveredbyspiralrowsofpits
multicolor. (c.16-19).Theteleoconchhasabout4whorls,smooth,al-
Operculum(Figs8I-J)similartothatofB.multicolor,with mostflat,withashallowbutdistinctsuture.Thecolouris
maybetheinternalprominenceslightlysmaller. redbrownwithawhitespiralbandnearthebase,anotherat
Distribution.–KnownfromMinerio,between35-43m. theleveloftheendofthesuture,oneinthemiddleofthe
Mostofthematerialwithremainsofsoftpartswascollected whorlandonesubsuturally.Theselightbandscanbemore
insand,contrarytothepreviousspecies,whichwasmostly conspicuousintheaperturalborder;theyarelightbrown
collectedbybrushingrocks. andnotverymarked.Aperturerounded,withasharpperis-
Habitat.–Mostofthematerial,eventhelivecollected tome;ontheupperpartandnearthebasetherearetwo
specimens(withremainsofsoftpartsinside),wascollected thickenedareas.Noumbilicus.
insandysedimentsat41m. Dimensions:Theholotypeis2.9mmlong.
Comparison.–ThespecieslivessympatricallywithBar- Distribution.–KnownonlyfromAnnobón,inshallow
leeiamulticolorspec.nov.,whichislesstransparent,thelatter water.Habitatunknown.
beingmoresolid,alittlelarger,theprotoconchslightly Comparison.–Mostofthespeciesofthisgenusintheis-
largerwiththespiralcordsmoreprominent,andtheperfo- landsoftheGuineanGulfaresmaller.
rationsoftheprotoconchmoreregularlyorderedinrows BarleeiatomensisGofas,1995,issimilar,butsmaller(usu-
andcolumns;theshellofB.multicolorwithbandsmaybe allyupto2.4mm),theprotoconchissmaller(upto350µm),
distinguishedbybeinglesstransparentandhavingwider andithassmallerpitsinmorerows(about28).Thecolouris
spiralbands. brownwithtwotypicalperiumbilical,lighter,spiralbands.
BarleeialindaeRolán&Swinnen,2004(Figs1A-B,4D), Barleeiamulticolorspec.nov.initsbandedorbrownform,
Basteria78(1-3)
B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 43
Fig.4A-G.A,Barleeiatranslucensspec.nov.paratype,1.34mm,Minerio,
SãoTomé(MNCN);B,Barleeiaproceraspec.nov.paratype,2.8mm,San
AntoniodePalé,Annobón(MNCN);C,Barleeiafuscaexiguaspec.nov.,
paratype,1.6mm,SanAntoniodePalé,Annobón(MHNS);D,Barleeia
lindaeRolán&Swinnen,2004,paratype,1.6mm,IlheuBombom,Prín-
cipe,(MNCN);E,holotype,1.2,SanAntoniodePalé,Annobón
43
(MNHN);F-G,shells,1.2,1.4mm,samelocality.
whorlandperiumbilical).Theprotoconchislarger(450-500
µmindiameter)andhasmorerowsofpits(about26versus
16-19).
Fig.3A-I.Barleeiamulticolorspec.nov.A,holotype,1.9mm(MNHN);B- Barleeiagougeti(Michaud,1830)islarger(upto6.1mm)
C,paratypes(whiteform),1.7,1.6mm(MNCN);D-E,shells,1.9,2.0 (Gofas,1995),mostlybrownonly,withaperiumbilicallight
mm(lightbrownform)(MHNS);F-G,shells(bandedform),1.9,1.7mm area.Protoconchlarger(500µm),withupto36rowsofpits.
(MHNS);H-I,shells(brownform),1.9,1.7mm(MHNS). Etymology.–ThespecificnameisfromtheLatinworld
procerus,-a,um,whichmeans:“elongate,large,high”,andit
referstothelargesizeoftheshell,whichisunusualinthis
issmaller(usuallyupto2.0mm),withadeepumbilicus,a genusintheGuineanGulfIslands.
protoconchthatissmallerindiameter(330µm)anda
smallernucleus(80µmversus200inB.procera);ithasami- Barleeiafuscaexiguaspec.nov.
crosculpturewithpits,notspiralcords.Inthebandedform, (Figs2E-H,4C,6I-K,7C-D)
thebandsaremoreprominentandwiderontheentireshell.
Barleeiaunifasciata(Montagu,1803)isalittlelarger;itis Typematerial.–Holotype:MNHN(25876,s;Fig.2E).Paratypes:
knownfromEurope,theCanaryIslandsandMauritania MNCN(15.05/60092,10s),MHNS(100599,70s;Figs2F-H,4C),CSG(5
(Gofas,1995).Thebandsarenotconstantbutwhenpresent s),CPR(5s).
therearethreeofthem(subsutural,inthemiddleofthe Othermaterialexamined.–20s,fandjfromthetypelocality.
Rolán, E. & Gori, S.–FivenewBarleeiaspecies
B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 44
44 Fig.6A-D.MicrosculptureofBarleeiamulticolorspec.nov.A,white;B,
darkbrown;C,light-brown-orange;D,withbands.E-G,Barleeialindae
Rolán&Swinnen,2004(afterGloriaMaris43[4]).E-F,protoconch;G,
microsculpture.H,microsculptureofBarleeiatranslucensspec.nov.I-K,
Barleeiaalbicolorspec.nov.,protoconchs.
Fig.5A-J.Protoconchs.A-H,Barleeiamulticolorspec.nov.A-B,white
shell;C-D,brownshell;E-F,light-brown-orangeshell;G-H,banded
bandsaremostprominentneartheaperturalborder.These
shell.I-J,Barleeiatranslucensspec.nov.
bandsarelightbrownandnotverymarked.Roundaper-
ture,peristomesharp,fusedwiththepreviouswhorlsinthe
contactarea.Noumbilicus.
Typelocality.–SanAntoniodePalé,2-10m,AnnobónI., Dimensions:theholotypeis1.7mmlong;afew
EquatorialGuinea. paratypesareslightlylarger.
Description.–Shellconical,solid.Dome-shapedproto- Distribution.–OnlyknownfromAnnobónIsland.
conchwith1½whorls,withadiameterofabout360µm,the Comparison.–Foritssmallsizethisspeciescanbedis-
nucleuswithabout100µm,coveredbyspiralrowsofpits tinguishedfromB.unifasciataandB.gougeti,whichfurther-
(about22-25).Theteleoconchhasabout3½whorls,smooth, morehavetheirdistributionrangeinnorthernAfrica,far
scarcelyconvex,withashallowbutdistinctsuture.The fromthisarea.
colourisredbrown,withawhitespiralbandcontinuingat BarleeiataeniolataGofas,1995,isaspecieswithashell
theendofthesuture,anotheratthemiddleofthelastwhorl withmoreconvexwhorls,translucent,withaprotoconch
andasubsuturalone,veryclosetothesuture;theuppertwo withasmallerdiameterand¼lesswhorls;ithasthree
Basteria78(1-3)
B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 45
45
Fig.7A-F.ProtoconchsofBarleeiaspeciesfromAnnobón.A-B,Barleeia Fig.8A-D.Radulae.A,Barleeiamulticolorspec.nov.,brownform;B,de-
proceraspec.nov.;C-D,Barleeiafuscaexiguaspec.nov.;E-F,Barleeiaalbi- tailoftherachidiantooth;C,Barleeiamulticolorspec.nov.,whiteform;
colorspec.nov. D,Barleeiatranslucensspec.nov.E-J,operculaofBarleeia.E-H,Barleeia
multicolorspec.nov.;E-F,brownshell;G-H,whiteshell.I-J,Barleeia
translucensspec.nov.
lighterspiralbandsthataredifferentlydistributed:inB.tae-
niolatatheupperbandisinthemiddleofthewhorl,thesub-
sequentoneisneartheendofthesutureandthelowerone
isbelowthislevel. Barleeiaproceraspec.nov.hasalargershellwithawider
BarleeiatomensisGofas,1995,hasalargershell(upto2.4 protoconch,widernucleusoftheprotoconch,smallernum-
mm),theprotoconchissimilarinsize,buthasupto28rows berofspiralrowsofpitsandfourlighterbandswithavery
ofpits;theonlytwolighterbandsaretypicallyperiumbilical. differentdistribution.Furthermore,bothspecieslivesym-
Barleeiamulticolorspec.nov.(thebandedform)hascords patricallywithoutintergrades.
ontheprotoconchandaprominentumbilicus.Thelight Etymology.–Thespecificnamereferstothebrown
bandsarewider,theuppertwoaresituatednearthesutures. colourandsmallsize.
Rolán, E. & Gori, S.–FivenewBarleeiaspecies
B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 46
Species Distribution Typelocality.–SanAntoniodePalé,3-10m,AnnobónIs-
BarleeiaaemiliiGofas,1995 CV land,EquatorialGuinea.
Barleeiaalbicolorspec.nov. A Description.–Shellsmall,white,fragile,smoothand
BarleeiachefiaeGofas,1995 CV shiny.Protoconchof1¼whorls,withanucleusof100µm,
BarleeiacinguloidesGofas,1995 AN withadiameterof280µmandamicrosculptureformedby
Barleeiafuscaexiguaspec.nov. A rowsofpits(about25),andsmall,spiral,depressedcords.
Barleeiagougeti(Michaud,1830) E,M,MA,S Teleoconchofabout3whorls,slightlyconvex.Lastwhorl
BarleeialindaeRolán&Swinnen,2004 P largeoccupying2/3ofthetotalheight.Suturedistinctbut
BarleeiaminusculaMonterosato,1889 M,MA,S notdeep.Apertureovoid,peristomecontinuous,sharp,gen-
Barleeiamulticolorspec.nov. ST erallyseparatedfromthepreviouswhorl.Thereisanumbil-
BarleeiapervulgataGofas,1995 AN icalfissure.Totallywhiteincolour.
BarleeiapictaGofas,1995 AN Dimensions:theholotypeis1.3mmlong.Alltheshells
Barleeiaproceraspec.nov. A aresimilarinsize.
BarleeiataeniolataGofas,1995 ST Distribution.–OnlyknownfromAnnobónI.Insedi-
BarleeiatomensisGofas,1995 ST mentsat6-12m.
Barleeiatranslucensspec.nov. ST Comparison.–Thisspeciescouldbeconsideredidentical
Barleeiaunifasciata(Montagu,1803) E,M,IC,MA withthewhiteformofBarleeiamulticolorspec.nov.fromSão
BarleeiaverdensisGofas,1995 CV Tomé,buttheshellsofB.albicolorspec.nov.arealways
LirobarleeiaelataGofas,1995 AN smallerthanthoseofthebrownB.proceraandfuscaexigua.
LirobarleeiapupoidesGofas,1995 AN Theyoccursympatrically,whiledifferingintheirshells,so
LirobarleeiasublaevisGofas,1995 AN thattheyareconsidereddifferentspecies.Barleeiamulticolor
46 PseudodialaaequinoccialisGofas,1995 EG spec.nov.islarger(about1.9mmversus1.3),moresolid,
PseudodialacorollariaGofas,1995 ST relativelymoreelongate(H/W=1.8versus1.6inB.albicolor),
PseudodialanisoGofas,1995 S theprotoconchiswider(330µminstead280),thespiral
TropidorissoiasecundaRolán&Templado,1994 ST,P,A cordsoftheprotoconcharemoreprominentandbeginning
TropidorissoiataphrodesTomlin&Shackleford,1915 ST,P,A
closertothenucleus,andtheperforationsinthenucleus
andbeginningoftheprotoconcharerelativelylarger,
TableI.BarleeidaefromtheWestAfrica.E=Europa;M=Morocco; whereastherowsarelessnumerous(about20-22versus25
CI=CanaryIslands;MA=Mauritania;S=Senegal;CV=CapeVerde spirals).
islands;ST=SãoTome;P=PríncipeI.;EG=EquatorialGuinea; Etymology.–Thespecificnamereferstothewhite
A=Annobón;AN=Angola. colouroftheshell.
Conclusions
Barleeiaalbicolorspec.nov. ThefamilyBarleeidaeisratherdiverseintheislandsofthe
(Figs2I-J,4E-G,6I-K,7E-F) GulfofGuinea.Therearethreegenera(Barleeia,Pseudodiala
andTropidorissoia)and11species:twoinTropidorissoia,one
Typematerial.–Holotype(MNHN25877,s;Figs2I,4E).Paratypes: inPseudodialaandeightinBarleeia.
MNHN(25878,alls),MNCN(15.05/60093,10s,5j;Figs2J);MHNS FivespeciesoccurinAnnobón,threeinPríncipe,and
(100600,50s,15j);CSG(10s);CPR(10s). seveninSãoTomé.Mostlikelythehighernumberofspecies
Othermaterialexamined.–Morethan100sandjinsedimentsfrom foundinSãoTomé,resultsfromthefactthatthisislandhas
thetypelocality. beencomparativelybettersampled.Itisquitewellpossible
Basteria78(1-3)
B77-2014-01:Basteria-2010 07/08/2014 21:31 Page 47
thatfurthercollectingwillresultinmorespeciesbeing References
foundalsointheothertwoislands.
AlongthewholeWestAfricancoasttheabundanceof Gofas,S.,1995.AremarkablespeciesrichnessoftheBarleeidae(Gas-
Barleeidaeisalsoveryhigh.Fourgeneraarepresent(Bar- tropoda:Rissoacea)intheEasternAtlantic.–TheNautilus109(1):
leeia,Pseudodiala,Tropidorissoia,andLirobarleeia)andatleast 14-37.
25species.Interestingly,onlyfourofthesespecieshadbeen Rolán,E.&Hernández,J.M.,2006.Newrecordsandnewspeciesofma-
describedbeforetheyear1920;mostofthemhavebeende- rinemolluscs(Gastropoda;Caenogastropoda:Rissoidae:Cingulop-
scribedsince1994(21species). sidae;Barleeidae;Tjaernoeiidae)fromMauritaniaandSenegal.–
BellowweincludealistoftheWestAfricanknown Basteria70:141-151.
speciesofBarleeidae(inalphabeticalorder),withindication Rolán,E&Swinnen,F.,2004.AnewBarleeia(Molusca,Barleeidae)from
oftheirgeographicaldistribution PríncipeIslands.–GloriaMaris43(4):1-6.
Rolán.E.&Templado,J.,1994.UnanuevaespeciedelgéneroTropidoris-
Acknowledgements soia(Mollusca:Gastropoda:Barleeidae)paralacostaoesteafricana.
–BollettinoMalacologico29(9-12):237-242.
JesúsMéndezandInésPazosmadetheSEMphotographsin Tomlin,J.R.B.&Shackleford,L.J.,1914-1915.ThemarineMolluscaof
theCentrodeApoyoCientíficoyTecnológicoalaInvesti- SãoThome,I.–JournalofConchology14(9):239-256,267-276.
gación(CACTI)oftheUniversityofVigo.SergeGofasmade
importantsuggestionsduringthetimeofpreparationofthis
manuscript.AntónioA.MonteiroandManuelAntonioE.
MalaquiashelpedrevisingtheEnglish.Theauthorsthank
ananonymousreviewerforhiscomments.
47
Rolán, E. & Gori, S.–FivenewBarleeiaspecies