A New Species Of Caridean Shrimp Of The Family Stylodactylidae From The Eastern Pacific Ocean

2004·2.7 MB·English

by  M K Wicksten

PROCEEDINGSOFTHEBIOLOGICALSOCIETYOFWASHINGTON
I17(3):377-384.2004.
A newspeciesofcarideanshrimpofthefamilyStylodactylidaefrom
theeasternPacific Ocean
MaryK.WickstenandJoelW.Martin
(MKW)DepartmentofBiology,TexasA&MUniversity,CollegeStation,Texas77843-3258,
U.S.A.,e-mail:[email protected]
(JWM)NaturalHistoryMuseumofLosAngelesCounty,900ExpositionBoulevard,
LosAngeles,California90007,U.S.A.,e-mail:[email protected]
—
Abstract. Four specimens of shrimp ofthe family Stylodactylidae were
collectedattwo stationsoffBajaCalifornia, Mexico, andCalifornia,U.S.A.
ThesearethefirstspecimensofthefamilyreportedfromtheeasternPacific.
The shrimp are describedas anew species,Bathystylodactylusechinus. The
species can be recognized by the following features: rostrum straight, much
longer than the carapace, bearing at least 23-27 dorsal and 18-25 ventral
spines; eye small and without pigment, stylocerite slenderandnotreaching
middle offirst segmentofantennularpeduncle, carapace withoutprominent
posteriordorsalhump,bodysetwithminutespinules,posteriorpereopodscon-
siderablylongerthananteriortwopair,slenderandlackingfringeofsetae.
ShrimpofthefamilyStylodactylidaeare Invertebrate Collection ofScripps Institu-
recognized by theirpeculiarfirst and sec- tionofOceanography,wefoundfourspec-
ondpereopods, whichendinelongatebut imensofshrimpofthisfamilyfromthree
nearlyequal fingerswith setaeonthecut- stations taken off California, U.S.A., and
tingedges.Thesepereopodsandthemax- BajaCalifornia,Mexico.Thespecimensin-
illipeds are densely setose. Species ofthe clude both males and females. We com-
familyarewidelydistributedfromtropical pared these specimens with specimens of
totemperateregions(e.g.,Cleva1990a),al- Stylodactylusrectirostrisinthecollections
thoughmostofthespeciesdescribedtodate ofTexasA&MUniversity(catalognumber
have come from the tropical Indo-Pacific 2-7212, Oregon station 5916) and with
(Chace 1983; Cleva 1990b, 1994, 1997; published descriptions ofother species in
OkunoandTachikawa2000).Chace(1983) thefamily.Thespecimensrepresentanun-
andCleva(1994)reviewedthemembersof known species of Bathystylodactylus, de-
thefamily,describednewspecies,andpro- scribedherein.
vided keys. Hanamura andTakeda (1996)
described an additional genus, Bathystylo- SystematicAccount
dactylus, for a new species {B. inflatus)
from offTaiwan (and forthe formerSty- Bathystylodactylusechinus,newspecies
lodactylus bathyalis from the Coral Sea), Figs. 1-5
bringing to 5 the number of recognized
generain the family (Stylodactylus, Neos- Holotype: Male, carapace length (CL)
tylodactylus, Parastylodactylus, Stylodac- 32.7.BasinoffMagdalenaBay,BajaCah-
tyloides, and Bathystylodactylus). There fornia, Mexico (24°35'N, 113°25'W),
havebeennopreviousreportsofthefamily 3563-3621 m, 6-foot Sigsbee trawl, 24
intheeasternPacificOcean. June 1965, ship Horizon sta. MV65-I-38,
While sorting specimens inthe Benthic CarlHubbs,collector;ScrippsInstitutionof
PROCEEDINGSOFTHEBIOLOGICALSOCIETYOFWASHINGTON
Fig.L Bathystylodactylusechi
Scalebar= 10.0
Oceanography (SIO) catalog number locatedventraltosuborbitalangle.Lateral
C3188. surfaceofcarapaceinflatedoverbranchial
Paratypes: Male,CL41.4, samestation region, suprabranchialcarinacurved.Area
as holotype, LACM CR 1965-349.1 (Nat- posteriortoeyeandantennaloriginslightly
ural History Museum of Los Angeles depressed.Anteriorregionsofcarapaceset
County).Female,CL29.7.BasinoffMag- withsmall,simple,movablespinules,pos-
dalena Bay, Baja California, Mexico teriorregionspunctateorwithfewspinules.
(24°23'N, 113°17'W), 3427-3621 m, 45- Abdomen(Fig. 1)withsmallspinuleson
footottertrawl,25June1965,shipHorizon dorsalandlateralsurfaces,somitesoneand
23(fo32o20stt°3a2..o,5t'tFMNeeVr,m6ta5r1l-a2ewI0l-°,C347L90,'FW2eC)7b.,..6H13uP96ba88bt19ts,o-,ns3hS6iEI3ps0OcNaecmraw,tp.mHe4non0o--t. ctwaewraoiknrlatoyeuncddaoreridsnaadltolery,s;awlsilyot,mhistooermifwtoieutrhtohruroteeunswdheeaadlkllotywo
nroi.zonCIs0ta3.241.33,collectorS. Luke, SIOcat. doefprseosmsiitoensirnotuenrdruepdt,intghdoosresaolfcsaorimniat;esplefuoruar
neaDrelsycrsitprtaiioghnt:,Rnoeasrtlryum2x(Filgesn.gth1,o2fB,carCa)- oavnedntfriavles(pFiign.e;5Bo)neeascphecwiimtehnswhiatihpmpoisntuetre-
p2a7cembouvtabbrloekednorinsaalllasnpdeci1me8n-s2,5wivtehnt2r3a-l (sFpiign.e5oCn,Ep)le8urXonloonfgersotmhiatnewtihdree,e.taTpeelrsionng
spines; series of 7-9 minute spinules on to apex, with 11-13 pairs ofdorsolateral
carapacejust posterior to rostrum proper, spineslocatedon weakridgesandnumer-
longsetaealongdistalventrolateralsurface. oussmallspinules;twomesialspinesflank-
Carapace(Fig.2A)withhepaticdepression ingapexoneitherside.(Apexoftelsonpre-
well delineated.Antennalandbranchioste- served in only one specimen; observed
galspinesshortbutobvious,antennalspine asymmetrymaybeduetoinjury.)
VOLUME117,NUMBER3
^C:>-f---^>^:--?-r^^^'=^rr:
Fig.2. Bathystylodactylusechinus,newspecies,maleholotype,carapaceandrostrum.A,carapaceandeye,
mlaatgenrialfivciaetwi.onBo,frroesgtirounmo(fartotascthreudmasthaorwenaionfBdaasnhdeddelnionetsedinbyAaarrnodwsi.lluSsctarlaetebdarat=sa1m0e.0smcamleAa,sBA;).2.C5,mhimghCe.r
Eyes (Figs. 1, 2A, 5A) reduced, cornea nularpeduncle,bladeexceedingdistolateral
withouttraceofpigment. spine. Carpoceritecoveredby minute spi-
Antennularpeduncle(Fig.5A)elongate. nules, reaching second segment ofanten-
Styloceriteslender,notreachingmiddleof nular peduncle. Basicerite bearing strong
first segment. First and second segments lateralspine.
subequal in length, third segment very Mandible (Fig. 3A) with molarprocess
short. Antennal scale (scaphocerite) more bearingteethinthefollowingconfiguration:
than4Xlongasbroad,outermarginslight- 2small,onelarge,4smallandlargeblunt
lyconcave,withmicroscopicspinules,not process; stout,2-jointedpalppresent.First
reachingendofsecondsegmentofanten- maxilla(Fig. 3B) with distal enditebroad
PROCEEDINGSOFTHEBIOLOGICALSOCIETYOFWASHINGTON
Fig.3. Bathystylodactyhisechinus,newspecies,maleparatype(LACMCR1965-349.1).A.mandible;I
mfiarxstilmlaixpieldl.a;ScCa,lesebcaornd=m5a.x0ilmlam;DA,,iBn,neDr;s1u0r.f0acmemofCs.ecEo.ndmaxillaslightlyenlargedandshowingpalp;E.firs
andwithstiffmesialsetae;proximalendite 2moreproximalendites;longpalpending
curvedinwardandendinginbrushofsetae; in5setae,scaphognathitewithanteriorhalf
palpendinginlongsetaeandhavingtufts rounded,posteriorhalfslenderandcurved
ofsetaeonlateralsurface.Secondmaxilla mesially, bearing longsetae. Firstmaxilli-
(Fig. 3C, D) withdistalenditelargerthan ped (Fig. 3E) with long distal and short
VOLUME117,NUMBER3 381
proximal endites;palpreaching3/4length suture(Fig.5D).Uropodsshorterthantel-
ofdistalenditeandendingintuftofsetae; son. —
exopodwithlash,welldevelopedcaridean Etymology. The specific name is de-
lobeanddeeplybilobedepipod. rivedfromt—heGreekwordforspiny.
Secondmaxilliped(Fig.4A)muchlarger Remarks. The new species can be as-
thaninnermouthparts,withexopodhaving signedtothegenusBathystylodactylusac-
lash and reaching end ofbasal segments; cordingtothefeaturesgivenbyHanamura
podobranchandepipodpresent;basalseg- andTakeda(1996).Thenewspeciesbears
ments fringed with stiffcurved setae; an- awell-developedandtwo-jointedmandib-
tepenultimatesegmentshort,withlongsim- ularpalp. Both sexesbearwell-developed
ple setae on flexor margin at articulation arthrobranchs on the four anterior pereo-
with basal segments; penultimate segment podal somites. There is no supraorbital
withfringeoflongsetaeonflexormargin; spine.Thestyloceritefallsfarshortofthe
twoterminalsegments;thatonflexorside mesiodistal margin ofthe basal segment.
longer than one on extensor side, both Therearenofringesofsetaeonpereopods
fringed with long setae. Third maxilliped 3-5,asthereareinStylodactylusrectiros-
(Fig. 4B) setose, with arthrobranch but trisandotherspeciesofStylodactylus.Han-
without exopod, exceeding antennularpe- amura and Takeda (1996) mentioned that
duncle by about length ofdistal segment. the third to fifth abdominal somites were
Ultimatesegmentlongest,withdensesetae "weakly carinate" dorsally. In our speci-
on flexor side. Penultimate segment with mens, only somite three is consistently
long,pinnatelybranchedsetae.Antepenul- weaklycarinate.Theposteriorthreepereo-
ttaiem.atesegmentwithbothlongandshortse- tpowdosindetfhieninteelwysapreecileosn,gbeurttdhuaenttohebraenatkeargieo,r
ptmegioaqertdurePesaue.lfsrcleFehioilxenropolsrnoaltgdesensp(urgFeritrfagthlea.hlcoatep4noloCaf)dcccr;aakirr(inpFpfngiuuigegssnd.,,gee4wrexpiBsnort,dophsipoCinodl)mgdsopunlwisgeion,trsaheewbletioeopatunnieh--t-, tbba(lhCoeemeldeuTieadnrrwvceaattor,yedealrlesuna1mspstd9icei9nrcvbT4eiiea)adbet,k.eshldeyefadnorlgafpiotsrmhB()esa1;vt9tih9thoaeo6yun)ssdC,etloalyfrByc:.arohlodiaBmon.Sctfteohlyfaeabfltrauu(TtssachasayHihnaSawanltnavoiy-net-s
longsetaeandshorterspine-likesetaealong (HanamuraandTakeda 1996). Bathystylo-
cutting edges. Secondpereopod similarto dactylusechinuscanbedistinguishedfrom
gfiartset.,Twhiitrhdtfoewfiftshcaptetreeroedpodsseta(eF;ig.me1r)ueslono-f tachteerfiosrtimcershbayrpitsspicnuervoendtrhoestvernutmraalndmacrhgairn-
thirdpereopodwith 8-10spinesonflexor ofabdominal pleuron three. Like Bathys-
andlateralsurfaces;merusoffourthpereo- tylodactylus inflatus, B. echinus has a
pod with 15, merus offifth pereopod 14; straightrostrumwithnumerousdorsaland
carpusshorterthanmerus;propodusbroken ventralspines.Thepleuraofthefourthand
anddactylusmissinginallspecimens. fifthabdominalsomiteseachbearaposter-
All pleopods densely setose. Firstpleo- oventral spine. However,inB. inflatusthe
pod shorterthan secondto fifth pleopods. carapacehasamarkedwideelevationnear
Malesecondpleopod(Fig.4D,E)withap- theposterodorsal margin. This is notpre-
pendixinternaandappendixmasculina,ap- sentinB. echinus.Theshapeofthesupra-
pendixmasculinareachingnearlyVilength branchialcarinaismoresinuousinB.infla-
ofappendixinterna,withapexnotchedand tusthaninB. echinus. InB. inflatus, there
bearingsmallhooks. are11spinulesonthecarapaceposteriorto
Lateral branchofuropodwith spinules, therostrum;inB.echinus,thereare8-9.In
marginnearly straight, two smallteethby B. inflatus, there are 9-10 dorsal rostral
PROCEEDINGSOFTHEBIOLOGICALSOCIETYOFWASHINGTON
Fig.4. BaJhylstylodactylusechinus,newspecies,maleparatype(LACMCR1965-349.1)(A)andholotype
(SIOC3188)(B-E).A,secondmaxilliped(paratype).B,rightthirdmaxilliped(upperappendage)andfirst
pereopod(holotype).C,highermagnificationofchelaoffirstpereopod(tipsoffingersbroken).D,second
pleopod(holotype).E,highermagnificationofappendixinternaandappendixmasculina(arrowfromD).Scale
bar= 10.0mmA.E.E;7.5mmB,C.
VOLUME117,NUMBER3
Fig.5. Bathystylodactylusechinus, newspecies,maleparatype(A)andholotype(B-E).An,antennule,
antenna,andeye(e),rightside,dorsalview,maleparatype(LACMCR1965-349.1).sc=scaphocerite;st=
stylocerite.B,lateralviewofabdominalsomite6plusportionsofthetelson,uropods,andpleuraeofsomites
4and5,holotype.C,telsonandrighturopods,dorsalview,holotype.D,highermagnificationofdistolateral
amrmeaAo,foBu;te7r.5urmompodC;(a3r.r7o5wmfmromD,C)E..E,highermagnificationoftipoftelson(arrowfromC).Scalebar=10.0
:
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spines located proximally tothe origin of abled Research program), and DEB
thefirstventralrostralspine;inB.echinus, 0138674toJ. Martinetal. (forcollection
therearenomorethan4. Theintegument support).
ofB. inflatuswasdescribedas "thin" and
thebody consequently "soft." InB. echi- LiteratureCited
nus,theintegumentappearstoustobetyp- Chace,F.A.Jr.1983.Thecarideanshrimps(Crustacea:
icalofabenthiccaridean,andnotmembra- Decapoda)oftheAlbatrossPhilippineExpedi-
nous (as seen in midwater species ofthe tion,—1907-1910,part 1.FamilyStylodactyH-
Oplophoridae,forexample). dae. Smithsonian Contributions to Zoology
(19C6l6e)vade(s1c9r9i4b)edantdheHabnoadmyuroafaBnatdhyTsatkyeldoa- Cleva,D3R8e.1c:a1p91o9-d02aa1,..CSaurridleeas)StdyeloId'aActtlyalnitdiaquee.(—CruBsutlalceetai,n
dactylus species as "pubescent." Theiril- MuseumNationald'HistoireNaturelle4, sen
lustrationsshowaverylightcoatingofpile. 12,sect.A,1:165-176.
cIhnarBa.cteecrhiisntuisc,atnhdeesapsiinluylesseeon,netshpeecbioadllyyaorne ed.asep1.e9c9Pe0psb..i7Cn1rd-uo-s1ot3ua6ecseitanDpAae.cciafCpiroqoduseansi:erdl,eesRSgetesynulrlotedasatcsettydlleies-s
thedorsalaspectofthecarapace.Thesespi- CampagnesMUSORSTOM,vol.6.—Memoires
nulesconforminshapeandstructuretotac- duMuseumNationald'HistoireNaturelle(A),
to1it9lh6ee1or)r.vcirbursattaicoenaanlsse(nCsoorhyenstraunctdureDsijskegernaainf ts1.ap4ce51ec.9ai9:e4s..D—eScoaTmpheoedAaBu)esatgwrliaetl,hiaRdneesScctoryrildpostdiaoocnftsytlhoiefdatMewuo(sCernuuesmw-
Bathystylodactylusechinusisthelargest andArtGalleriesoftheNorthernTerritory11
anddeepestspeciesknowninitsfamily.It 53-64.
wascollectedwiththeflatbacklobsterWil- . 1997. CrustaceaDecapoda: Stylodactylidae
l1-e3m8oeasnidaMiVn6o5rn-aIt-a39F,axaonndawtitshtattihoengsaMlaVt6he5i-d erSteOcoaRlutSeVTsaOennMuaIt7nudeot(nCe8sa)e.m,pDaaogunnxneesTeiessKAcWoaRlmUlpilBseAmeRetn,FtuaMtiurUen-sa
crab Munidopsis antonii (A. Milne-Ed- surelesStylodactylidaedeNouvelle-Caledonie.
wards)atstationMV65-I-39. Pp.385-407inA.Crosnier&RBouchet,eds.,
ResultatsdesCampagnesMUSORSTOM, 16.
MemoiresduMuseumNationald'HistoireNa-
Acknowledgments turelle,Paris172.
WethankLarryLovell,ScrippsInstitution Cohen,anMo.reJc.,ep&tioSn..DiPjpk.gr6aa5f-.1018961i.nCTh.apHt.erWa2t.eMremcahn-,
of Oceanography, for allowing us to ex- ed..ThephysiologyofCrustacea,vol.II.Aca-
tatuashmnaitcnnoekeaaantpndhoetaheonnsstoppiniaetylcamilsomiytuenynsosdnuryreamivnynid.gewaToefhrvfeiesfirostir.tnugWadlyeearsbatseliinsns-o-g Hanamucdnnraeeeapmww,oidcYsga,p:ePenrc&uSeitsseysMs,lB.oafNdtTarehacoytwkmsyetldYyniaolod.roarkedt1).ah9,cw96te6w8ys.il1ttueEshrpspntd.(aeCPbsralcucirsiisftiphactcm.iee—oann:tZooDoffeo--aa
efitedfrompartialsupportfromNSFgrants logicalScience13:929-934.
o(DlfEorgBoym),9t9hDe7E8P1BE9E30T1t2oI0n6iJ.t3i5aMtatirvoteCiolnfifaSfynCsdutenDmn.aitJniagcchoBabims- Okuno,tf1hr9Je.o6,m8g&esn(ouHCusr.tuhNseTetraoancschteJiayak,lpaoawdnDaa.ec.—ctay2Plp0ruo0osd0ca.eH:eaAdyiaSnnstgyhesliwodo&asfcptteMhycieilyeiaBsdkiaeoeo.-)f
etal.(fromtheBiocomplexityGenome-En- logicalSocietyofWashington113:39-47.