aqua, Joulnal ot lchthyology and Aquaiic Biology

Three new speciesof blennioidshore discoveredat Navassalsland, Caribbean Sea

JeffreyT. Williams

Divisionol Fishes,Department of SystematicBiology, National Museum of NaturalHistory, Washington,DC 20560,USA. E-mail: williams.jeff @nmnh.si.edu

Accepted:03.09.2002 Keywords sitesde collecte,le plussouvent en plong6eautonome: Navassa,Caribbean, West Indies,reef fishes, new cinq blennies,deux poissons-ventouseset un gobie. species,rotenone, Chaenopsidae, Dactyloscopidae Cet article comprend la description de trois des blennioides,deux chaenopsid6set un dactyloscopid6: Abstract Acanthemblemariaharpeza, espdce nouvelle,sur base An exploratoryexpedition to Navassalsland was car- de 268 sp6cimensde Navassa; vitta, ried out in April-May1999. Specimensrepresenting espdcenouvelle, sur base de deux sp6cimens,l'holo- eight undescribedcryptic species were taken with type de Navassaet le paratypede Belize;el Gillellus rotenonewhile occupying 22 collectingstations, mostly inescatus,espdce nouvelle sur based'un specimen de by scubadiving: Iive blennioids,two clingfishes,and a Navassa.Les descriptionsde ces trois espdcesnou- goby. Descriptionsof three of the blennioids,two vellespermettent de faire figurerles noms dans une chaenopsidsand a dactyloscopid,are includedhere: liste des poissonsdu littoralde l'ile Navassa,sous AcanthemblemariaharDeza new soeciesbased on 268 pressedans aqua. soecimens from Navassa: Emblemaria vitta new speciesbased on two specimens,lhe holotypelrom Sommario Navassaand the paratypelrom Belize;and Gillellus Nel periodo aprile-maggio1999 Iu condotta una inescatusnew speciesbased on one specimenfrom soedizionenaturalistica all'lsola Navassa. Nelle immer- Navassa.Descriptions of thesethree new speciesare sioni subacquee,mediante I'impiego del rotenone, providedherein to allow the use of the names in a Iuronocatturati in 22 stazionidi raccoltaesemDlari dalle checklistof the shorelishesof Navassalsland, which is abitudinicriptiche appartenentiad otto specie non in pressin aqua. ancoradescritte: cinque del gruppodelle bavose,due succiascoglie un ghiozzo-Tre specie affini alle bavose Zusammentassung sono descritte in questo articolo; si tratta di due Eine Forschungsexpeditionzu der NavassaInseln chenopsidie di un dattiloscopide. wurdeim April-May1999 unternommen. Es sindacht harpeza n. sp. si basa su 268 esemplariraccolti a unbeschriebenekryptische Spezies mit Rotenonan 22 Navassa:Emblemaria vitta n. sD.si basasu due esem- Sammelstationen,meistens mit Tauchllaschen,gelun- plari,l'olotipo raccolto a Navassae un paratipopresso den worden:lilnf Schleimfische,zwei Saugfischeeine lo stato di Belize;Gillellus inescatus n. sp. d invece Grundel.Die Beschreibungvon dreiSchleimfischarten, fondatosu un unicoesemplare raccolto a Navassa.Le zwei Chaenopsidenund ein Dactyloscopidwird hier descrizionidi questetre nuovespecie vengono qui pre- vorgenommen:Acanthemblemaria harpeza n. sp. senlateoer oermettereI'uso dei loro nomiscientifici in basierendauf 268 Exemplarenvon Navassa;Emble- una checklistdei Descicostieri dell'lsola Navassa di maria vitta n. sp. basierendauf zwei Exemplaren,der prossimapubblicazione su aqua. Holotypvon Navassaund der Paratypvon Belize;und Gillellusinescatus n. sp. basierendaul ein Exemplar lntroduction von Navassa.Die Beschreibungdieser drei neuen Navassais a smallisolated island located at 18' 25'N, Spezieserfolgt heute, damit man die Namenin einer 75' 05'W (Fig.1), about55 km westof the Tiburon Checklisteder K0stenfischevon der NavassaInsel in Peninsulaof Haiti and about 22O km north-eastof der nachstenAusgabe von aqua benutzenkann. MorantPoint, Jamaica. lt was claimedby the United Statesunder the Guano Act of 1857 (Skaggs,1994) R6sum6 and designated a United States Nalional Wildli{e En avril-mai 1999, une exp6ditiona explor6 l''ile Refugein April1999.The surface area is about3.5 km'?, Navassa.Des sp6cimensde huit espdcescryptiques the maximumlength is 2 km, and the maximumeleva- ont 6t6 caDtureesa la rot6nomelors de I'examende 22 tion is 76 m (Turner,1960). The islandrises abruptly

aquavol.6 no.1 - 2002 Three new species of blennioidshore fishes discoveredat Navassalsland, Caribbean Sea

from fairly deep water.The depth at the shorelineis describeddactyloscopid species by the following about 24 m exceptfor some shallowerwaters at the combinationof characters:an esca-likestructure at tiD north-weslend. Corals and spongesgrow on the large of elongatedlirst dorsalfin spine;first three dorsallin blocksof rockthat havebroken off the cliffsand tallen spinesform isolatedanterior finlet; lower lip with tour into the watersaround the island.Coral cover is most fimbriae;upper lip lacking fimbriae; LL with more scales extensivein shallowwalers and at about 30 m at the (23) in arched portion than in straightportion (20); north-westend of the island.A majorgoal of the April pectoralfin rays 13. lt differs from a other Aflantic 29-May12, 1999,expedition to Navassa(NAV 99) on Gilleus tn having11 caudalfin rays(versus 1O), 20 boardthe lvl^y'Ouestand the DominicanRepublic's - scalesin thestraight portion of the LL (versus12-19 or ery vesselMago de Mar was to conductas compre- 22-25),and 32 caudalvertebrae (versus 23-28). hensivea surveyof the fishesol Navassaas possible. Amongthe fishescollected in 1999at Navassa(Col- Description letle et al., in press, reporting234 speciesof lishes Basedon theonly known specimen. rayslll known from Navassa)were specimensrepresenting + X|,26 (totalelements 40), firstspine with a fleshy eight new species of cryptic fishes.Thacker (200'1) esca-likemass of tissueat its tip; anai fin rays ll, 30; describedthe new goby, Briggs (2001; erroneously caudalfin rays6+5=1 1; pelvicfin rays1,3; pectoral '13; fin describedas an easternPacilic species) described one rays most posteriorrib on vertebralcentrum 12; of the new clingfishes,Williams and Tyler(in press in vertebrae10 + 32 = 42. SmithsonianContributions to Zoology)are describing Napewithout scales; no scalesbetween arched por- the secondnew clingfishspecies, and Williamsand tionof LLand base of dorsal fin; scales in arched LL 23, l\,4ountshave submitteda manuscriotto aoua with straightportion of LLwith 20; pectoral fin base and ven- descriptionsof two new speciesof Starksia(Labrisomi- ter (bellyanterior to anus)lack scales; principal preop- dae).The other three speciesare describedas new ercularcanal pores 3; upperlip without fimbriae, lower herein. lip with 4 fimbriae;opercular fimbriae 8; each eye with smallsupraorbital flap. Methods Body elongate,compressed; holotype and only Countsand measurementsgenerally follow Smith- knownspecimen 23.5 mm SL, headlength 6.5 mm, Vanizand Palacio (1974) and Dawson (1982). Lengths lengthof Iirstdorsai fin spine 2.5 mm,length oI second are givenas standardlength (SL); is abbre- dorsalfin spine 0.3 mm. Small esca-like structure at tip viatedas LL. Institutionalabbreviations: BMNH-Natural of elongatedfirst dorsal fin spine. Genitalpapilla ol HistoryMuseum, London; LACIVI-LoS Angeles County male holotypevery short and broadlyconical, posi- Museum,California; MCZ-Museum of Comparative tionedimmediately posterior to anus and anteriorto Zoology,Harvard University; SIO-Scripps lnstitution of baseoI firstanal fin spine. Oceanography;USNM-National lvluseum of Natural Colour in lite: Headof maleholotype whitish with History,Smithsonian Institution. small iridescentblue chromatophoresdistributed over snout,cheeks, top of head,and ontopectoral fin base, Gillellus inescatus n. sp. about lour slenderbrownish streaks cross uooer and Flagfinstargazer lowerlips, about four irregular,narrow reddish brown (Fis.1) stripes extendingposteroventrally across suborbital area,cheek with three broad diagonal stripes, the most Holotype:USN|\il 360232 (young mate, 23.5 mm SL), dorsaland mostventral stripes reddish brown, extend- Navassalsland, sand and rubbleflat on outer shelf ingdiagonally toward angle of preopercle,these stripes betlveenNW Pointand Lulu Bay;depth 27-30 m; NAV borderingbroad whjte stripe extending across middle of 99 sla. 27; rotenone;J. T. Williams,B. B. Co ette. L. cheek; top ol head cream-coloured,opercle whlte, Micheletti;7 May'1999. encircledby reddishbrown ringj body white venlrally, dorsal half with cream colouredbackground overlaid Diagnosis withsmall iridescent blue chromatophores, eight red- Gillellus inescatus may be distinguishedfrom all dish brownsaddles on body,first and broadestcover- ing area anteriorto and extendingposteriorly beyond isolateddorsal finlet, saddle with dark reddishbrown borderssurrounding tan centralportion, branching ven- trolaterallyas it encircles white opercle, posterior branch broad and extendingonto pectoralfin base; subsequentseven saddles about halt width of first,sad- dles with reddish brown outlines and central oaler brownregion, each saddle extending ventrally to about Fig- 1. Gillellusinescalus n. sp., holotype,Dactyloscopi- midlaterallevel on sidesof body.Small escalike struc- dae, USNM 360232,sta.27,25.3 mm SL. ture at tip of first dorsallin spine with reddishbrown aquavol.6no.1 - 2002 JeflreyT. Williams anterior and oosterior borders. caudal lin with 21.1\,MCZ 161483 (5, 18.4-23.4), SIO 02-79 (5, 19.0- melanophoresscattered over central portion of middle 23.5),and USNM 367205(58, 15.9-25.5),all from: rays.Pectoral fin withwhite blotch covering basal tifth of Navassalsland, steep rock wall at shorejust eastof fin and adjacentportion of fleshypectoral fin base.All NorthwestPoint; 18' 25' N, 75' 0'1'W;3-9 m; NAV99, otherfins translucent. sta. 7; rotenone;J. T. Williams,B. B. Collette,L. Colour in alcohol:Head and bodystraw-coloured, N4icheletti,F. Allum; 30 April1999. withoutpigmentation or anyevidence of dorsalsaddles Additionalmaterial. All from Navassa lsland: USNIVI or otherlife colours described above. 359514,sta. 10; USNN/360204, NAV 99, sta. 16; usNtvt359561, NAV 99, sta.21; USNM360322, NAV Geographicdistribution 99.sta.28. Gillellus inescatus is currently known only from Navassalsland, where it was takenat a depthof 27-30 Diagnosis. m. Althoughknown lrom one specimen,only limited Acanthemblemariaharpeza may be distinguished samplingusing rotenone at depthsof 27 m andgreater fromall describedspecies ot Acanthemblemariaby lhe has beencarried out at Navassaand a morecompre- followingcombination of characters:head spines on top hensivesurvey of the faunaof sandand rubbleareas of head posteriorto orbitwelFdeveloped, with 7-10 at depthsof 30 to 50 m is neededto assessthe popu- roughlygrouped spines on eitherside of frontalsuture; lationsize ot this speciesat Navassa. no blackspot in anteriorportion oI spinousdorsal fin, nasalcirri heavily-branched, usually with more than 6 Etymology free tips on each cirrus;supraorbital cirri extensively- The soecificeDithet is basedon the Latininescale branched,with main stalk dividing basally into three or meaning"to baitl'in referenceto the esca-likestruc- morebranches, most of the tips distallybilurcate, pec- tureon the distaltip of thefirst dorsal fin spine,which torallin rays13, dorsal fin usually with 21 spinesand 14 mightbe usedas a baitto lureprey toward the fish, or or 15segmented rays, segmented anal lin raysusually possiblyto attractfemales. It is giventhe common 22 ot 23, total vertebrae41 or 42: terminal rays of name,Ilagfin stargazer, in referenceto the esca-like dorsaland anal fins bound by membraneto thecaudal structure,which resembles a flagbeing flown Irom the tin alongproximal hall of mostdorsal and mostventral too of the sDine. caudalrays; in life,white stripe extends along underside of headlrom tip of lowerlip almostto baseof pelvics. Afiinities AmongAtlantic congeners, Gillellus inescatus shares Description the lownumber of lowerlip fimbriae (4) wilh G.uranidea, Theholotype condition is lollowed by the modalvalue G. healae,and G.jacksoni: also the absenceof scales in parenthesesafter applicablecharacters. Dorsal lin '14 abovethe lateralline with G. healae.ltdiffers from all in raysXXI or XXll, or 15 (XXl,15:onlytwo specimens '14 having11 segmentedcaudal lin raysand an elongate withXXll, bimodal at and15); anal tin .ays11,21-24 firstdorsal lin spinewith an esca-likestructure at its tip. (ll, 24: ll, 23); segmentedcaudal fin rays 7+6=13; An argumentcould be madefor placinginescatus in a new genus.As only one specimenis known,and its characteristicsgenerally concur with those ol Gillellus, I tentativelyplace inescatus in Gille us. Acanthemblemariaharpeza n. sp. Thornbushblenny (Figs.2, 3)

Hololype:USNM 367203 (male, 24.2; measured 28.3 Fig. 2. Acanthemblematiaharpeza n. sp.,Chaenopsi- immediatelyafter capture), Navassa lsland, shore at dae, USNNiI367203, sla. 5, 24.2 mm SL, head and undercutol islandat NorthwestPoint: 18' 25' N. 75' anteriorportion of body. 01'W; 0-4.5m; NAV99, sta. 5; rotenone;J. T. Williams, B. B. Collette,C. Thacker,L. Micheletti,M. Smith;30 ADril1999. Paratypes:USNM 367204(4, 19.3-23.9);collected withholotype. USNM 367206 (57, 14.7-23.5), Navassa :Y!',.,:- "* lsland,at shoreon tipof NorthwestPoint, rocky under- cut at shorewith drop-off to about4 m; 18' 25'N, 75" 01'W;0-9 m; NAV99, sta. 1; rotenone; J. T. Williams, B. B.Collette, C. Thacker, [,4. Miller; 29 April1999. BNINH Fig.3. Acanthemblemariaharpeza n. sp., Chaenopsi- 2002.7.3.1 (5, 17.9-21.6), LAC|\456003-1 (5, 18.0- dae.USNIV 367203, sta.5,24.2 mm SL.

aquavol.6no.1 - 2002 Three new species ol blennioidshore fishes discoveredat Navassalsland, Caribbean Sea pectoralfin rays 13; pelvictin rays l, 3; most posterior Colour in life: Male holotype(Fig. 2, 3) with small '12 rib on vertebralcenlrum 13; vertebrae + 29 or 30 = bluishwhite spotsover head and most oI body,back- 41 or 42 (12+ 30 = 42:12+ 30 = 42). groundcolour of headwith mixtureof largeyellow and Dentition:upper and lowerjaws with outer row of large smallblue chromatophoresover dorsal half, lower half conicalteeth flankedby inner band oI smallerconical of head with purplish black background,distinctive teeth;palatines with doublerow of conicalteeth (holo- white stripe extendingtrom tip ol lower lip posteriorly type with total of about 14 on each side);vomer with along undersideof head almostto base of pelvicfin; teetharranged in a circle(holotype with 6 teeth). lips with alternatingpale and dark bars, lips with red- Cephalicsensory pores: mandibular 4, common1, dish (whiteon lowerlip) bar anteriorly,sequentially fol- preopercular6, postemporal2, lateralsupratemporal 4; lowedposteriorly by greenishblue (reddish on lowerlip) median supratemporal1, supraorbital2-3, posterior bar, white bar, purplishblack bar, white bar, then pur- infraorbital3, anteriorinfraorbital 3, frontal0, median plishblack bar. Head spines, orbital cirri, and nasalcirri interorbital2-3, anterior lrontal 1, nasal 2 (anterior with scatteredyellow, blue, and red chromatophores. nasalpore locatedat ventroanteriorend of nasalbone lris oI eye with red pigmentaround pupil, scattered underneaththe anteriornasal spines;posterior nasal melanophoresover outer portion. BackgroundcoF pore immediatelyabove posteriornostril at base of orationof body similarto that of head, but blue chro- most dorsalnasal soine). matophoreslarger and more prominent;body pattern Supraorbitalcirri extensively-branched,with main changesat about levelof anal fin originwhere yellow stalk dividingbasally into three to six main branches; and bluechromatophores cluster into a seriesof green- mostof the tips distallybifurcate (left cirrus of holotype ish saddles alternatingwith broad pale inlerspaces with 31 free tips). Anterior nostril tube-shapedwith alonglhe basesof dorsaland analfins. Dorsalfin: two heavily-branched(usually more than 6lree tips on redspots in the anteriorfleshy flap, proximal spot small, each) nasal cirrus arising from the distal margin of mostdistal spot pupil-sized;distal white slripeextends posteriorwall of eachtubular nostril (left cirrus oI holo- along marginfor entirelength of fin; yellowstripe with type with 11 lree tips).Posterior nostril a roundedpore embeddedmelanophores extending along ventral bor- situated near the anterior border of the orbit. Well- der of white marginal stripe from about spines 6 developedfleshy llap extendsalong anterior margin ol through14, whereyellow stripe breaks up and contin- first dorsal spine in both sexes. Dorsal fin slightly ues at aboutsame level along fin as smallyellow spots indentedbetween last spine and first segmentedray. withembedded melanophores; anterior 13 to 14 spines Terminalrays of dorsaland anal fins boundby mem- and interspinalmembranes with relativelydense blue brane to caudal fin just posteriorto bases of most and yellow chromatophorescoalescing into irregular dorsaland mostventral caudal rays. spots and stripes;posterior hall of fin with pigment Head spineswelldeveloped, directed anteriorly: top restrictedto shaftsof rays.Anal fin: distal tips of spines of head posteriorto orbitwith 7- 10 spinesin a roughly yellow;anterior four elementsand theirlin membranes triangulargroup on either side of trontalsuture (total withyellow chromatophores proximally flanked by band forboth sides 14-18 spines); posteromedial rim of orbit of densely-groupedblue chromatophores; remainder of smooth;supraorbital rim of eachfrontal with posterodi- fin with blue and yellowchromatophores restricted to agonal row of 3 anterolaterallydirected spines sepa- shatts of rays, membranestranslucent, distal white raledby a shallowgroove lrom rowol2-5 spinesalong bandextends along margin from first segmented ray to dorsal rim of orbit (these, with their almost parallel end of fin. Caudal lin translucentwith yellow chro- partnerson the oppositeorbital rim, form a deep,con- matophorescovering distal third ot shaftsof rays.Pec- cave interorbit);anterior rim (lateralethmoid) ot orbit toralfins translucent. Pelvic fins blackwith narrowwhite with 5-6 shortspines; ventral rim (lacrimal)of orbitwith stripealong longest ray. 1-2 spinesanteriorly, posteriorly small tuberclesIorm Femalessimilar to males,but purplishblack area not raisedridge, anterior tip of lacrimalwith 2 spinespro- develoDedon undersideof head. jectinganterolaterally; nasal bone with longitudinalrow Colour in alcohol: Maleholotype with head and body of 4 or 5 spines (2 or 3 spines grouped beneath cream-coloured,only pigmentation being several anteriornostril at anteriortip of nasal,1 spinebetween melanophores around the anus (all but a few nostrils,I spinedorsomedial to posteriornostril). melanophores,present in the colourpattern ot all fresh Body elongate,compressed; holotype and largest specimens,disappeared within a few monthsafter ini- knownspecimen measured 28.3 mm SL immediately tial preservationin tormalinand subsequentstepwise after capture, but after preservationmeasures 24.2 transler into 75% ethanol).Orbital and nasal cirri mm SL, headlength 5.4 mm.Genital papilla oI male translucent, orbital cirri with scattered tiny holotype short and conical, positionedimmediately melanophoresnear branch tips. Dorsalfin translucent posteriorto anus and anteriorto base of first anal lin withblackish band (its width about equal to diameterof spine.Females with ringof slenderfilaments encircling pupil)of melanophoresextending along distal margin .15; anus, gonoporeborneon fleshy mound immediately from spines 6 through small groups of posteriorto anus. melanophoresalso presentas small spots on inter- aquavol.6no.1 - 2002 14 JelireyT. Williams spinalmembranes between spine 17-18and 19-20; at base; 26-32 m; NAV 99, sta. 25; rotenone;J. T posteriorto spine 20, melanophoresvariously scat- Williams,B. B. Collette,C. Thacker, L. Micheletti;6 May tered along tips ol some rays.Caudal fin translucent. '1999. Anal fin translucentwith narrow diagonal streak of Paratype:USNM 296362 (13.5); Belize, Carrie Bow melanophoresextending lrom distal tip of first anal Cay, fore reef near sand trough at end of spur and spine,across interspinal membranes to a pointat about groove;10-12 m; CBC-104,K-172; B. Kensley;3 Dec. mid-lengthof fourthfin element(second segmented 1985. ray). PectoralJins translucent.Pelvic fin with several scatteredmelanophores. Diagnosis Femaleswith pigmentationsimilar to male above, Emblemaria vitta may be distinguishedfrom all but band extendingalong distal margin of dorsallin describedspecies of Emblemariabythe followingcom- variouslybeginning at spines8-10 and terminating at binationof characters:third soft pelviclin ray vestigial spines16-18 and no melanophoresaround anus or (onlytwo obvioussegmented rays), orbital cirri broad on analfin. and ribbonlike,pectoral fin rays13, segmenteddorsal fin rays13, segmented anal lin rays.19,vertebrae 12 + Geographic distribution 25 = 37, in preservative,males with anteriorportion of Acanthemblemariaharpeza is currentlyknown only spinousdorsal fin blackwith a translucent,whitish area from Navassalsland where it is the most common at baseof firstseveral spines. chaenoDsidin the coastalwaters. lt was collectedat numerousstations and is currentlyknown from 268 Description specimens,ranging in sizefrom 13.3-28.3 mm SL. Basedon the two knownspecimens; when different, the holotypecondition presented lirst. Dorsalfin rays Etymology XlX, 13or Xvlll, 13;anal fin raysll, 19;caudal fin rays The specific epithet is based on the Greek noun 7+6 = 13; pelviclin rays 1,3(third ray vestigial,that of harpezameaning thorn-hedge and relersto the heav- holotypeis a tinysliver, its lengthgoes about five times ily-branchednasal and orbital cirri that resemble in longestpelvic ray; third ray of paratypenot obvious bushesamidst the thornlikespines on the head. lt is externally);pectoral lin rays 13; most posteriorrib on treatedas a nounin apposition.lt is giventhe common vertebralcentrum 12; vertebrae 12 + 25 = 37. name,thornbush blenny, in referenceto the bushycirri Supraorbitalcommissural pores 3; 3 supratemporal andthornlike sDines on the head. poresarranged in a shallowV with mostposterior (lat- eral) pores positionedanterior to transverseline Affinities throughdorsal fin origin- Cephalic sensory pore pattern Hastings(1990; subsequently modified by Almanyand essentiallyidentical to that describedby Johnsonand Baldwin(1996) after inclusionof their newlydescribed Greenfield(1976: fig. 1Aand C) for Emblemariapiratula. species,4../bhnson,) hypothesized phylogenetic rela- Orbitalcirri well-developed,unbranched, broad and tionshipsamong the speciesof the genusAcanthem- Ilattened,resembling a slenderpiece ol ribbon;length blemaria. Acanthemblemariaharpeza shares derived of each cirrus about twice diameterof eye. Anterior characterstates placing it in a polytomywilh A. paula nostriltube-shaped with simple,slender nasal cirrus and A. aspera,all of whichlorm the sistergroup to 4. arisinglrom distalmargin of posteriorwall of eachtubu- medusa. Acanthemblemariaharpeza may be distin- lar nostril.Posterior nostril a roundedpore situated near guishedlrom A. paula,A. asperaandA. medusaWhav- anteriorborder of orbit. ing more than 6 free tips on each of its extensively- Body elongate,compressed; holotype and largest branchednasal cirri and, in life,a whitestripe extending knownspecimen 18.0 mm SL (paratype13.5), head along undersideof headfrom tip of lowerlip almostto length5.2 mm (4.9),depth at anus2.7 mm (2.2),diam- baseof pelvics. lt furtherdiffers lrom A. aspen andA. eterof bonyorbit 1.2 mm (1.1),orbital cirrus 2.7 mm medusainlacking a blackspot anleriorly in the spinous (damagedin paratype).Genital papilla of maleholotype dorsal fin (presentin the last two) and having more spineson top of the head.Additionally, A. harpezamay be distinguishedfrom A. paulaby having21 o( 22dor salfin spines (versus 18-20). Emblemariayifta n. sp. Ribbonblenny (Fis.a)

just Holotype:USNM 367202 (18.0) Navassa lsland, Fig. 4. Emblemaria vitta n. sp. Williams. holotype, southol NorthwestPoint on shelfoff W side of island, Chaenopsidae. USNI\.4367202, sta.llf €*4 't8. mm SL, ridgesol rockwith sea fans,sponges and sand/rubble male.coloration after preservation in alcohol. A

ID aquavol.6no.1 - 2002 Three new species of blennioidshore fishes discoveredal Navassalsland, Caribbean Sea short and conical,positioned immediately posterior to Navassaincluding the specimensdescribed as new anusand anteriorlo baseof firstanal fin soine. speciesherein. In particular,lthank the expedition Colour in alcohol (basedon holotype):Life colours leaderAndrew Wight, and Bon Allum,Tove Petterson unknown.Head and anteriorhalf of body brown, and Lynn Micheletti.For assistancein variousways, I melanophoresbecoming more dispersed and distinct thankRichard Rosenblatt and H. J. Walker (SlO), Jerry at mid-body,posterior half of body pale cream Finan,Kris l/urphy, Jefi Clayton,Shirleen Smith, and coloured.Orbital and nasalcirri pale. Anterior third of DavidSmith (USNM), Sara Henley(National l/arine dorsalIin darkbrown (almost black) with paletriangular FisheriesService), Fernando Bretos (Center Ior Marine areaat basesof spinesone through four, posterior two- Conservation),and Carlos Rodriguez(Dominican thirdspale with narrowstripe of melanophoresalong Republic).Bruce Collette read and providedconstruc- distalmargin. Caudal fin pale.Anal fin with brown tive commentson earlydrafts of the manuscript. melanophoresover anteriorthird, posteriortwo-thirds palewith narrowstripe of melanophoresalong distal Reterences margin, tips ot rays pale. Pectoralfins translucent. Almany,G. F. & C. C. Baldwin.1996. A newAtlantic Pelvicfins brown. speciesoI Acanthemblemaria(Teleostei: Blennioidei: Chaenopsidae):morphology and relationships. Geographicdistribution Proceedingsof the Biological Society of Washington, Emblemaria yltta is currently known only from 109(3): 419-429. Navassalsland and Carrie Bow Cay (Belize)in the Briggs,John C.2001. New clingfish(Gobiesocidae) CaribbeanSea. ll doesnot aooearto be commonin trom lsla Grande,Colombia. Copeia, 2OO1 : 7 45-7 46. eitherarea, as both placeshave now been extensively Collette,B. 8., WilliamsJ. T.,Thacker,C. E., & M. L. sampledusing rotenone, but only two specimens have Smith. In press.Shore fishes of Navassalsland, West beencollected. lts siblingspecies, E piratula,is known Indies:a case study of why rotenonesampling is only fromthe Gulf of lvlexico. neededfor reelfish biodiversitystudies. aqua. Dawson,C. E. 1982.Atlantic sand stargazers (Pisces: Etymology Dactyloscopidae),with descriptionof one new genus The specificeoithet is basedon the Latin noun ylla and seven new species. Bulletin of Marine Science, meaningband and refersto the ribbon-likeshape of the 32 (l): '14-85. orbitalcirri. The name is treatedas a noun in apposi- Hastings, P. A. 1990. Phylogeneticrelationships of tion.lt is giventhe commonname, ribbon blenny, in ref- tube blennies of the genus Acanthemblemaria erenceto the ribbon-likeshape ol the orbitalcirri. (Pisces:Blennioidei\. Bu etin of Marine Science,47 (3):725-738 . Affinities Johnson, R. K. & D. W. Greenfield.1976. A new Withinthe genusEmblemaria, E y/tfashares the ves- chaenopsid 'fish, Emblemaria hyltoni, lrom lsla tigialthird pelvicfin ray characteronly with E. piratula Roaten,Honduras. Fieldiana Zoology, T0 (2): 13-28. Ginsburgand Reid in Ginsburg,1942, E. caldweli Skaggs,J. M. 1994.The great guano rush. St. Martin's Stephens,1970, and E. hyltoniJohnson and Green- Griffin,New York, 334 p. 'l.3 field, 1976. Emblemaria vitta and E. piratula, with Smith-Vaniz,W. F.& F.J. Palacio.1974. Atlantic fishes pectoralfin rays, may be distinguishedlrom E. cald- of the genusAcanthemblemaria, with descriptionsot '14 welli,and E. hyltoni,bolh with pectoralfin rays.The threenew speciesand commentson Pacilicspecies siblingspecies E. vifta and E. piratulahave similarly (Clinidae:Chaenopsinae\. Proceeding of the Acad- shapedand pigmenteddorsal lins, withthe maleshav- emy ot NaturalSciences, 125 ('11)i197-224. ing a large,sail-shaped black spinous portion with a Thacker, C. E. 2001. Evermannichthysbicolor, a new palerectangular area at its baseanteriotly. Emblemaria goby (Teleostei:Perciformes: Gobioidei) from vitta and E. piratula may be distinguishedby seg- Navassalsland. Los AngelesCounty Natural History menteddorsal fin ray counts(13 vs. 14 to 16) seg- Museum Contributiongin Science, 49O,5 p. mentedanal fin rays(19 vs. 20 or 21) and vertebral Turner,R. D, 1960.Land shellsot Navassalsland, counts(37 vs.39 to 40). West lndies.Bulletin of the Museumof Comparative Zoology,'l22: 231-244. Acknowledgements Williams,J.T. & J. C.Tyler. In Press(2003). Revision I am gratefulto the AnimalPlanet television series ol of the WesternAtlantic clingfishes of the genus lorri- DiscoveryCommunications, Inc., and BeyondProduc- codon (Gobiesocidae),with descriptionsof live new tions,Inc., for supportingthe NavassaExpedition and species, Smlthsonlan Contributionsto Zoology, num- for the resulting televisionprogram "The Quest - ber621. Episode3: Forbiddinglslandsi' I appreciatethe assis- tanceof BruceCollette, Chris Thacker, and MikeSmith, and lhe crew ol MN Questand the Beyondstaff on board in helping to take samples of the fishes ot aquavol.6 no. 1 - 2002 16