THE NAUTILUS 121(4):21()-213, 2007 Page 210 Two new gastropod species (Neogastropoda: Drilliidae, Turridae) from the western Atlantic Ocean Donn L. Tippett 10281 GainslK)rou<i;h Rd. Potomac, MD 20854 USA ABSTRACT SYSTEMATICS Two new deep-water species from the western Atlantic are Drilliidae Olsson, 1964 proposed: Drillia (Clathrodhllia) hiakensis and Hindsiclava Genus Drillia Gniw 1S38 rosenstielamis. Drillia blakensis is nearest Drillia {Clalhnxlril- lia) petuchi Tippett, 1995, an<l Hinckiclava rosenstlelunus re- Tyjje Species: Drillia umhilicata Gray, 1838, by sub- calls Hindsidava pohjtoiiii (l)all. 1881). Animal anatomy, es- sequent designation. Gray, 1847. pecially foregut anatomy, is described for H. msotsticlniiiis. Subgenus Clathnxlrillia DixW, 1918 Additional Kci/uords: New species, Brazil Type Species: Muivxgibbosus Born. 1778, byoriginal designation. INTRODUCTION Drillia {Clathnub'illia) blakensis new species (Figures 1-3, 8) The species pi'oposed here ai^e examples ofthe richness — ofthe turrid faunathat continues to be discovered in the 'r* Turridae sp. Lamv and Pointier, 2001: 22, number deep waters ofthe western Atlantic. Althougli collected 73, list, p. 26, photo. in the 1960s, neither has been previously reported. The type material of Drillia blakensis was part of the Bullis Description: Shell ol medium-size (to approximately collection, secured as by-catch from the RA' Oregon. 4.5 nun), elongate, tusitorm,with tall spire andlarge body Hindsidava rosenstielanus was dredged by the Univer- wliorl measuring abtmt 0.5 shell length. Shell tapering sity of Miami's IW Pillsbury, but was onlv recently graduallywith moderate basal constriction to moderately chscovered during a rexiew of the pre\"iouslv vmsorted elongate, open, slightlv notched, slightlv bent right ante- portion ot the mollusk collection at the Universit)' of riorcanal. Protoconch decollated, teleoconchwhorls ten. Miami's Rosenstiel School ot Marine and Atmospheric Whorls well-rounded, shoulder sulcus on upper third Science. It is evident that further e.xploration and re- concave, suture prominent. Sculptiue ofrounded, regu- search will continue to reveal new material. larly spaced axial ribs \\dth ecjual interspaces, extending from shoulderto followingwhorl on spire and to base on body whorl. Rilis increase in runnbei' with shell growth, MATERIALS AND METHODS seven onearlywhorls, 12, narrowei-andcloserspaced, on penultimate, ten or 11 on bodv whorl leading to small Empty shells and shells with presei"ved animals were ex- varLx 0.25 whorl back of lip edge, two or three possilily amined. Presei-ved material was dissected. Radulae were abortive ribs following varix. Fint' spiral threads overall, mountCeMdCoPn microscopic slides and stainedwith Pronto- weaker on sulcus. Aperture parallel-sided with apically eil + 10. T)'pe specimens were deposited at the tliiccted, U-sliapcd sinus posteriorly, bordered on body National Museum of Natural Histoiy and other institu- whorl bv flat parietal tuliercle. Lip sloping roundly for- tions. Tlie classification used is that proposed by Taylor, ward below sinus, uppei' edge directed upward, nairow- Kantor, and Sysoev, 1993, whicli involved a reai'range- ing sinus somewhat, producing spout-like appearance. ment ofthe traditional classification ofthe Turridae. Ab- Stromboidnotchdistinct. Coloi'(lirt\-white overall, faint, Pbrheivliaadteilopnhsiaa,re:PenAnNsSyPlv,anAiac;adMeCmyZ,ofMNuastem-uaml SocfieCnocems-, pale brown peripheral band, lilolcli of same coloi- on varix and spots preceding tops of axial ribs on later parative Zoology, Harvai'd University, Cambridge, Mas- sachusetts; UMML. Invertebrate Museum, Rosenstiel wliorls. Operculum (Figure 8) of chestnut color, o\ate Willi iduiidK pointed anterior enil and Iciniiiial nucleus. School o{ Marine and Atmospheric Science, Universit)' ofMiami, Florida; USNM, National Museum ofNatural Type Material: hilolxpe, USNM 9000.34, 40tM50 m. I History, Smidisonian Institution, Washington, DC. May 1965; three [laralxpes, USNM 1096708, data same Tippett, 2007 Page 211 Figures 1-7. Drilliids and tunitls. 1-3. Diillia (Chithro(hiHUi') hlakciisis new species, holotype, USNM 900034, 44.8 xl6.0 mm, apertural, lateral, dorsal\ie\vs. 4-6. Hinclsiclam r(KcnsticIaniis newspecies, holohpe, USNM 1086746, offRiohacha, offColombia, 44..3 X 13.6 mm, apertural, lateral, dorsal \iews. 7. Plciirotoinci (DriUia) pohitorta Dall, 1881, holot)'pe, USNM 412171, 32.6 x 9.6 mm. offCape San .Antonio, Cuba. Scale bar = 2.5 mm. as forhoIot\pe, 4.5.7 x 16.6 nini. 44.1 x 14.7 mm, 42.5 x Crassispini polijtoiid (DM. 1881): Okitani, 1983: 304, mm 16.0 (ex-Jose and Marcus Coltro collection., e.x- description and figures (apertural antl latt'ial views plus autlior's collection); all dredged by RA' Oregon on type radular teeth). locaUts-. — PTunidae sp. Lamyand Pointier, 2001: 22, number 71, Other Material Examined: one specimen. Dr. Dou- list and photo. glas \\'olie collection ,41.2 > 15.5 mm. dredtied b\- RA^ Description: Shell of medium-size (to appro.ximately Oregon' on t\pe locality-. 48 nun), elongate, fusiform, tuixeted, with tall spire, T^pe Locality: Blake Plateau; precise location un- body whorl about 0.4 of shell length, whorls rounded known, data presimiabK' not retained. below concave shoulder slope, gently constricted at base to moderately long, anterior canal open, notch lacking. Distribution: Blake Plateau and possiblv ott Saba Is- Protoconcli with 2.5 smooth whorls, tip central, first 1.5 land. Xetherlands -\ntilles (Lam\" and Pointier). whorls glossv, remainderdull-white, terminating in short Discussion: Drillia hhikciisis is most similar to DriUia portion of whorl with 4-5 axial rihlets that quickl\- en- {ClathrodriUia) petuchi Tippett, 1995, from which it dif- large to axial ribs in adult shell. Teleoconch whorls 9-10. fers m being narrower, ha\dng less robust ribs, finer spi- Aperture of parallel sides and with moderately deep, rals, a broader, non-tabulate, more sloping sulcus, and U-shaped posterior sinus on shoulder slope. Parietal tu- fainter color pattern. The author has not seen the shell bercle absent. Suture distinct, almost channeled, slightlv figured in Lamy and Pointier, stated to be 48 mm in wavy. Subsutural cord of double threads. Axial ribs ro- lengtli and from 150 m depth, however it appears from bust (11-12 on body whorl, 11 on penultimate), extend- the Illustration to be D. hlakemis, differing in being ing faintly across sulcus above and to next suture on slightK' broader, having a slightly shorter anterior canal spire, disappearing on base; interspaces half again as and stronger peripheral color banchng, ieatures within wide. Uniform, regularly spaced spiral threads (5-6 on intraspecific \ariation hmits. whorl periphei"\') cross libs, producing modest, laterally elongate nodules, then continue fon\'ard to anterior ca- Etyxnolog)-: Named after the Blake Plateau, the type nal. Microsculpture of fine spiral threads, incluchng sul- localitw cus, irregular in strength and distribution. Notch and Turridae H. -\dams and A. Adams, 185.3 (18.38) varix lacking. Color diitv'-white overall, ti'aces of dai'k periostracmn. Crassispirinae Morrison, 1966 Gross Anatomy: Animal white, toot with upturned Genus Hindsidaia Hertlein and Strong, 1955 propodium, operculum locate d posteriorly on toot. T>-pe Species: Clavainla militaris Hinds, 1843, by Head bearing two tentacles, each with eye dorsallyon an expansion midway from base. Penis behind right ten- original designation. tacle, reflected back under mantle. Respiratoiy siphon Hindsiclaia rosenstielanus new species on left, bearing a fold, mantle edge extending across (Figures 4-6. 9. 10) head, with moderate anal sinus on right. Gills and os- Page 212 THE NAUTILUS, Vol. 121, No. 4 ^.Ji Figure 10. Ilindsiclcua ro.ien.slicliniiis. ladiila, teeth are 300 [xm length. buccal mass. Gland ducts and radular ribbon enter at beginning of esophagus ventralllyand posteriorlyto buc- cal mass. Incomplete radula with approximately 40 pairs of wishbone marginal teeth (Figure 10) measuring ap- proximatelvoOO |xm. Operculum (Figure9) medium am- ber, o\ate with flat proximal side, njunded peripheral side, ends rather shaiply rounded, terminal nucleus at anterior end, T^pe Material: Ilolot\pe, USNM 1086746, west of Riohaclia. oil Colombia,' ir32' N 07.3"23' W, 549 m, KA' Pillsbm-)' 781, 30 July 1968, 3 m, otter trawl, ex- UiVlML30.10788; parahpes (ex-UMML): onespecimen, USNM MCZ 1107006; one specimen, 359135; one speci- men, ANSP 416320; seven specimens UMML 30.107S8, lour with animal presen'ed, three shells only. All irom t)pe localit\'-. Olher Material E.xamined: USNM 902064, three specimens, oil Cartagena Colombia, (ex-Jose and Mar- , cus Coltro collection, ex-author's collection); Pleurotonia iDhllhi) pohjloi-tn ]:)al]. 188L USNM 412171. holotvpe. Type Locality: West ol iliolKiclia, oil ( iolombi:!. Discussion: Hhiilsicliiia ni'-icnsticldnii.i is most similar to llunls'iildKi poh/lmia (Dall. 1881) (Figure 7) reported a from off Cuba. Hiiidsirhii nisciislichiniis dillers by its wider sulcus, doubled subsutural cord, le\ver ribs (e.g., Figures 8, 9. (Jpercula, inner (left) and mitci (right) \ie\vs. nine on sixth spirewliorlversus 12on equivalentwhorlof 8. Diilliii {Cicillirodhllia) hlakensis, 7.5 iiiiii lriijj;tli. 9. Hiiidsi- tltni/ I'inciisUcIaitii.s. 11 mm lensith. Scale bar = 5 nun. pah/toiia), presence of fine secondan' spiral threads overall, and absence of parietal tubercle. The specimen reported by Olaitani, measuring 58 x 19 mm, Irom .328- phradiuin visible througli mantle. Reetum on right. 470 m offSurinam, appears to be this .species despite the Puckered rh)aichostome between and sliglitly below ten- larger size and the radular teeth which are dissimilar at tacles. Rhynchostomal sphincter present. Rhynchococl the location of their basal attachment (drawings appear with strong linear I'olds internally. Rhynch(.)deal wall cii- stylized). The specimen reported by Lamy and Pointier cularlyfoldeddue to retraction. Proboscis long, circularly (2001) from 450 m off Point Noire, Guadeloupe, is 63 mm folded along its length in presei"ved animal due to con- in length and, appears to be tins species, again de- traction, linear folds posteriorly. Large buccal mass and spite its lai'ger size, and also despite the geographic dis- cavity posterior lo ilivncliodcum. No sphincter seen at tance ol Guadalupe Irom the t)pe locaIil\ ol icscnslicln- beginning ol esophagus. Lai'ge, highly coiled poison iiu.s. The specimens in USNM 902064 are identical wltli gland and bulb in body cavity. Right and left salixaiA the type material except that the axial ribs are slightly glands present, i'vadnlar ril>bnn MMitial and posterior to briiader. Tippett, 2007 Page 21.3 Et"Miiolog\': Tilt' species is named lor the Hoseiistit'I autl in the Carihbeau Sea, 1877-79, hv the U.S. coast School of Marine and Atmospheric Science, Universit\' steamer "Blake," Lieutenant-commander C. D. Sigsbee, of Miami, from which the material ^^'as obtained. U.S.N., and Commander J. R. Bartlett, U.S.N., commanding. 1.5. Preliminaiyreporton the mollusca. Bul- ACKNOWLEDGMENTS letin ofthe \hiseum of Comparative Zoolog)' 1.5(2): .33- 144. The author thanks the Department ot In\'ertebrate Zo- Lamy, D. and J-P. Pointier. 2001. Les molluques profonds des ologw National Museum ot Natural Histon', Smithsonian Antilles Fran^'aises. Xenophora 95; 21-27. Institution for the opp(5rtunit\- ofworking with the moi- Okutani. T. 19S3. Mollusks. In: Masatsune. T. and T. Okutani lusk collection and use of the equipment and facilities. (eds.) Cnistaceans and mollusks trawledoffSuriuame and Nanc\' \'oss donated specimens of Hindisclova rosen- French Guiana. Japan Marine Fishen' I'lesource Research stichiiuis from the UMML. YolandaVillacampa prepared Center, pp. 187-354. the SEMs. Dr. jern' Harasewx-ch was constantK' heljitul Taylor, J. D., Yu. I. Kantor, and A. V. Sysoev. 1993. Foregut in proNiding use ofequipment, ad\"ice and sii[ipnrt. The anatomy, feeding mechanisms, relationships and classifi- cation ofthe Conoidea (= To.xoglossa) (Gastropoda). Bul- author thanks these people. letinofthe Natural Histon"Museum(Zoology).59(2): 125- 170. LITERATURE CITED Tippett. D. L. 1995. Taxonomic notes on the Western Atlantic Dall.W. H. ISSI. Report.son the resultsofdredgingunderthe Tmiidae (Gastropoda; Conoidea). The Nautilus 109; 127- supenision of Alexander Agassiz, in the Gulf of Mexico 1.38.