Paralamprops poorei, sp. nov. (Crustacea: Cumacea: Lampropidae), a new Australian cumacean

2009·2.6 MB·

by  Sarah Gerken

MemoirsofMuseumVictoria66:71-75(2009)
ISSN 1447-2546(Print) 1447-2554(On-line)
http://museumvictoria.com.au/About/Books-and-Journals/Journals/Memoirs-of-Museum-Victoria
Paralampropspoorei sp. nov. (Crustacea: Cumacea: Lampropidae), a new
,
Australian cumacean.
SarahGerken
DepartmentofBiologicalSciences,UniversityofAlaska,Anchorage,3211 ProvidenceDr.,Anchorage,AK99508,USA
([email protected])
Abstract Gerken, S. 2009. Paralampropspoorei, sp. nov. (Crustacea: Cumacea: Lampropidae), a new Australian cumacean.
MemoirsofMuseumVictoria66:71-75.
ParalampropsisasmallgenusinthecumaceanfamilyLampropidae.Anewspecies,Paralampropspooreisp.nov.
is describedfromthe southernAustralian continental slope. Paralampropspoorei canbe distinguishedfrom all other
Paralampropsbythe combinationofatoothedmarginal carina, subequal antennularflagellae, maxillulewithoutpalp,
pereopods3and4inthefemalewithrudimentaryexopods,pereopod5witharticleproportionsasinpereopods3and4,
telsonwith5lateralsetaeand3equalterminalsetae,andthemalewiththreepairsofpleopods.
Keywords Lampropidae,Cumacea,Paralamprops,Crustacea
Introduction Lampropidae
The genus Paralamprops Sars, 1887 currently contains 19
ParalampropsSars, 1887
species, with species ascribed to the genus from around the
world, with records from 232-5395 m. The difficulties of Paralampropspooreisp.nov.
collecting intact deep sea crustaceans are well known, and
Paralamprops is particularly difficult to collect in an Figures 1-2
undamaged state, as the pereopods are generally quite long Materialexamined. Holotype.Australia, Victoria,76kmS ofPoint
and delicate and prone to damage. Of the 19 species in the Hicks(382920S-382649S, 149 1959E-1492047E), 1840m,
genus, 8 were erected on the basis of single specimens, 26/10/1988,col.Poore,GaryCB,NMVJ59990(ovigerousfemale).
although P. semiornatus Fage, 1929 has been redescribed Paratypes.Australia,Victoria,76kmSofPointHicks(382920S
from ample material by Roccatagliata (1994). Due to the -Po3or8e,26G4a9ryS,CB14,9N19MV59JE59-991249(2s0uba4d7ulEt),fe1m8a4l0e)m;,J5269/91901/1(9s8u8b,adcuollt.
incomplete descriptions of some species ascribed to
femaledissected);J54394(5subadultmales,2subadultfemales).
Paralamprops, the generic diagnosis is quite variable,
including presence and absence ofamaxillule palp, and itis Diagnosis. Carapace with strongly toothed marginal carina,
likelythatthegenusisnotmonophyletic. withdorsolateral swellings, otherwisewithoutsetae orspines.
Antennulemainflagellumandaccessoryflagellumsubequalin
Methods length.Maxillulewithoutpalp.Pereopods3and4inthefemale
with rudimentary exopods. Pereopod 5 shorter than basis of
SampleswerecollectedwithaWHOIepibenthicsled,fixedin pereopod 4, of 6 articles, article proportions similar to
formalin on board the RV Franklin and transferred to 70% pereopods3 and4. Malewith3 pairsofpleopods.Telsonwith
ethanolattheMuseumVictoria,Melbourne,Australia(NMV). 5lateral setae,3 equal terminal setae. Uropod exopod shorter
AllmaterialexaminedbelongstothecollectionoftheMuseum thanendopod.
Victoria. Specimens were temporarily mounted in a mixture Description. Holotype ovigerous female, body length 12 mm.
odifss1e0c%tinegthmaincolr/os9c0o%pegwliytchercianmaenrdadlruaciwdnawoirtahLaeiLceaicDaMMZL1S62 dCoarrsaopvaecnetraslulryfacfelatstmeonoedt,h,mawrigtihnapalirceadridnoarswoiltatherdailstsinwcetllilnagrsg,e
compound microscope with camera lucida. Body length is teeththroughout, antennal notch absent; eyelobe less than 0.1
measured from the tip ofthe pseudorostrum to the posterior carapace length, no lenses present; carapace longer than
borderofpleonite6.FigureswerepreparedinAdobeIllustrator thoracicsegmentstogether(fig. 1A).
aftertheinstructionsinColeman,2003. Paratypesubadultfemale(fig. IB).
72 S.Gerken
Figure1.Paralampropspooreisp.nov.,female:a,sideview,holotypeovigerousfemaleJ5990;b,dorsalviewsubadultfemale,paratypeJ59992;
c-i,subadultfemale,paratypeJ59991;c,antennule;d,antenna;e,mandibles,broken;f,maxillule;g,maxilla;h,maxilliped 1;i,maxilliped2.
Scalebarsforsideanddorsalview 1.0mm,allotherscalebars0.1mm.
Paralampropspoorei,sp.nov.(Crustacea:Cumacea: Lampropidae),anewAustraliancumacean 73
Figure 2. Paralampropspoorei sp. nov., subadultfemale, paratypeJ59992: a, maxilliped3; b, pereopod 1; c, pereopod 2; d, pereopod3; e,
pereopod4;f,pereopod5;g,telsonanduropods.Allscalebars0.1mm.
74 S.Gerken
Antennule extending past pseudorostral lobes; peduncle 1plumoseand1 simplesetae;ischiumwith1 simpleseta;merus
article 1 longest, with 2 complex pedunculate setae; article 2 unarmed;carpuswith2annulatesetae;propoduswith1annulate
0.8lengthofarticle 1,withsimplesetae,marginserrate;article seta;dactyluswith3simplesetaeterminally;exopodrudimentary,
3 0.6 length of article 2, with 6 simple and 4 complex of2articles,with3 simplesetaeterminally(fig.2D).
pedunculate setae; main flagellum of 5 articles, each article Pereopod 4 basis longer than all other articles together,
with 1 simple seta, subterminal article with 2 aesthetascs; margin serrate, with 1 simple and 1 plumose setae; ischium
accessory flagellumof3 articles, subequaltomain flagellum, with 1 simple seta; merus unarmed; carpus with 2 annulate
withsimplesetae(fig. 1C) setae; propodus with 1 annulate seta; dactylus with 3 simple
Antennaof4articles; article 1 with2 simple setae; article setae terminally; exopod rudimentary, of 2 articles, with 2
2 shortest,unarmed; article3 unarmed; article4with6 small simple setaeterminally(fig. 2E).
simplesetae(fig. ID). Pereopod 5 entire shorterthan basis ofpereopod4; basis
Mandibles navicular (broken in fig.), with row of 10-13 as long as next 4 articles together, with 2 pedunculate, 1
setae,leftmandiblewithlaciniamobilis(fig. IE). plumoseand1simplesetae;ischiumunarmed;merusunarmed;
Maxilluleof2endites;outerenditewithrowofstoutsetae carpus with 1 simple and 2 annulate setae; propodus with 1
distally; inner endite with 2 simple and 3 microserrate setae annulateseta; dactyluswith 1 simplesetaterminally(fig. 2F).
distally;palpabsent(fig. IF). Telson 2.2 length of pleonite 6; lateral margins serrate
Maxilla of 3 endites; broad endite distal margin with anteriorly, with 5 microserrate setae; 3 microserrate setae
simple and pappose setae, medial margin with row of setae; terminally(fig. 2G).
medialnarrowenditewith4microserratesetae;lateralnarrow Uropod peduncles 2.8 length of pleonite 6, longer than
endite with 5 simple setae; both narrow endites extend past telson,with 10-11 medialmicroserratesetaewithsubterminal
setaeondistalmargin. setule. Uropod endopod of 3 articles, subequal to uropod
Maxilliped 1 basisproduceddistallyasbluntlobe,medial peduncle; article 1 longest, with 7 medial microserrate setae
marginwith2 hooksetae, distal marginwith 1 stoutpappose withsinglesubterminal setule,2lateral simplesetae;article2
and4simplesetae;ischiumabsent;meruswith 1papposeseta; with 1 microserratesetawithsinglesubterminalsetule;article
carpuswith5comblikesetaemedially,fieldofpappose setae, 3 with 1 microserrate seta with single subterminal setule,
and1papposesetalaterally;propoduswithsimpleandpappose terminal seta broken. Uropod exopod of 2 articles, shorter
setaemedially,with2plumosesetaelaterally; dactyluswith 1 thanendopod;article 1 0.2lengthofarticle2,unarmed;article
longplumose setaand4simple setae(fig. 1H). 2with2 simple setae,terminal setabroken(fig. 2G).
Maxilliped2basisaslongasnext4articlestogether,with Subadultmales (notfigured) with3 pairs ofpleopods and
4 plumose seta distally and 2 simple setae laterally; ischium otherwisesimilartofemales.
present, unarmed; merus with 1 plumose setamedially and 1
plumose setalaterally; carpus with4plumose setae medially Etymology.ThespeciesisnamedpooreiinhonorofGaryC.B.
and 1 plumose setalaterally; propodus with3 plumose and3 Poore on the occasion ofhis retirementfromthe Museum of
simple setaemedially, 1 plumoseand 1 simple setaelaterally; Victoria as a tribute to all his many contributions to both
dactyluswith2 simplesetaeterminally(fig. II). carcinologyandcarcinologists.
Maxilliped3basisaslongasallotherarticlestogether,not Distribution.Victoria,continental slope, 1840m.
expanded distally, with plumose setae medially andlaterally;
ischium present, unarmed; merus with 2 plumose setae Remarks. There are 8 other species of Paralamprops with a
laterally and 1 medial plumose seta; carpus with 4 plumose toothed marginal carina, P. aspera Zimmer 1907, P.
setae medially, 2 plumose setae laterally; propodus with 4 carpusserratusMuhlenhardt-Siegel,2005,P.corolliferaGamo,
simple and4pappose setaemedially, 1 simple and3 pappose 1990, P. girardi Reyss, 1978, P. margidens Day, 1978, P.
setaelaterally;dactyluswith3simplesetaeterminally;exopod semiornatus Fage, 1929, P. serratocostata Sars, 1887, and P.
aslongasbasis,basalarticlemarginserrate(fig. 2A). tuberculataRoccatagliata, 1994. ParalampropsasperaandP.
Pereopod 1 basisaslongasnext4articlestogether,medial serratocostata are easily separable from P. poorei by the
and lateral margins serrate distally, with plumose setae presence of additional toothed carinae on the carapace; in P.
medially and laterally; ischium with 1 plumose seta; merus poorei, the only carinais the marginal carina. Paralamprops
margin serrate, with 4 plumose setae; carpus with 6 simple carpusserratus can be distinguishedfromthe new species by
setae; propodus with 8 simple setae; dactylus with 5 short the nearly circularcarapace, the unequal antennularflagellae,
simple setae and 2 long setae terminally; exopod as long as theserratedcarpusofpereopod2,thereducedpereopod5and
basis,basalarticlewith4papposesetae(fig. 2B). the 2 lateral setae on the telson; in P. poorei the carapace is
Pereopod2basisaslongasnext4articlestogether,lateral longer than wide, the antennular flagellae are subequal, the
margin serrate, with 5 simple setae; ischium with 1 simple carpus ofpereopod2isnotserrated,pereopod5hasthe same
seta; merus with 1 simple and 1 stout microserrate setae; articleproportionsaspereopods3 and4,and5lateralsetaeare
carpus 0.6 basis length, with 9 stout microserrate setae presentonthetelson.Paralampropsgirardicanbedistinguished
medially, 1 simple setalaterally;propoduswith 1 simpleseta; fromthenew speciesbytheequal rami oftheuropodandthe
dactylus broken, with simple setae; exopod 0.8 basis length, presence of 4 stout setae on the carpus of pereopod 2; in P.
basalarticlewith 1 simple seta(fig. 2C). pooreitheuropodexopodisshorterthantheendopodandthere
Pereopod3basislongerthanallotherarticlestogether,with are 9 stout setae on the carpus ofpereopod 2. Paralamprops
Paralampropspoorei,sp.nov.(Crustacea:Cumacea: Lampropidae),anewAustraliancumacean 75
margidenscanbedistinguishedfromP.pooreibythepresence Day,J. 1978. SouthAfricanCumacea,Part3: FamiliesLampropidae
ofatootheddorsal crestonthecarapace,4lateral setaeonthe and Ceratocumatidae. Annals ofthe SouthAfrican Museum76:
telsonand3setaemediallyontheuropodpeduncle;inP.poorei 137-189
there is no toothed dorsal crest, 5 lateral setae on the telson, Fage, L. 1929. Cumaces et Leptostraces provenant des campagnes
and 10-11medialsetaeontheuropodpeduncle.Paralamprops scientifiques du Prince Albert First de Monaco. Resultats des
CampagnesScientifiquesAccompliesSurSonYacht77:3-47.
semiornatuscanbedistinguishedfromP.pooreibythetoothed Gamo, S. 1984.Anew abyssal cumacean, Paralamprops corollifera
dorsal crest on the carapace and the presence of a maxillule sp.nov.(Crustacea)fromeastoftheJapanTrench.Bulletinofthe
palpwith2 setae; inP.poorei,thereisnotootheddorsal crest BiogeographicalSocietyofJapan39:21-25.
on the carapace, and the maxillule is without a palp. Miihlenhardt-Siegel, U. 2005. New Cumaca species (Crustacea:
ParalampropstuberculatacanbedistinguishedfromP.poorei Peracarida) from the deep-sea expedition DIVA-1 with RV
bytheexpanded,“winglike”article 1 presentintheantennules “Meteor”totheAngolaBasininJuly2000.FamiliesLampropidae,
(Roccatagliata, 1994); in P. poorei the first article of the Bodotriidae.OrganismsDiversityandEvolution5,supplement1:
antennuleisnotexpanded. 113-130.
Reyss,D. 1978. Cumaces de profonde de FAtlantiqueNord. Famille
Acknowledgements desLampropidae.Crustaceana35: 1-21.
Roccatagliata, C. 1994. Two Paralamprops species (Crustacea:
Jo Taylor organized this contribution in honor of Gary C.B. Cumacea) from the deep Atlantic. Cahier Biologie Marina 35:
Poore’s retirement, and Jordi Corbera provided a thorough 415-430.
reviewthatimprovedthemanuscriptgreatly. Sars, G. O. 1887. Report on the Cumacea. Report on the Scientific
Results oftheExploring VoyageofH.M.S. Challenger, Zoology
19: 1-73.
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