, THE NAUTILUS 126(l):33-37, 2012 Page 33 Eosipho zephyrus a new species (Gastropoda: Buecinidae) from deep water off Chile Koen Fraussen Javier Sellanes Peter Stahlsehmiclt Leuvensestraat25 UniversidadCatolicadel Norte Institute for Environmental Sciences B-3200Aarschot, BELGIUM Faeultadde Ciencias del Mar Universitiit Koblenz-Landau [email protected] Larrondo 1281, Coquimbo, CHILE Fortstrasse7, D-76S29 Landau, GERMANY [email protected] [email protected] and Centrode InvestigationOceanograficaen el Paclfico Sur-Oriental (COPAS) UniversidaddeConcepcion Casilla 160-C, Concepcion, CHILE ABSTRACT interpretingitin awidercontextbycomparingwith Indo- West Pacific relatives. It belongs to what we call the Eosipho zephyrus, a new deep-water species from off the “Eosipho aldermenensis group”. Species belonging to, or CdiheilneaenwcsopaesctieissdferscormibCeadn.tPhraortuoscoanlcdehrmmeonrepnhsoilsogPyowdeilslt,in1g9u7i1s,hesa assignedto, Eosipho are knownfrom thewestern Atlantic tshpeecifeirsstcormemcoorndlyofplaacmedeminbedire goefntuhseEo“EsoispihophTohiaelled,er1m9e2n9e.nIstiiss garnodupf,rohmowtehveerI,ndwoa-sWeusnttilPanciofiwc;ktniorewEnosoinplhyofarlodmentnheeneInnsdios- group” in the eastern Pacific. Generic allocation in Eosipho West Pacific. The present new species is the first mem- Thiele, 1929 versus in Manaria Smith, 1906 is briefly dis- ber ofthe genus known to occur in the eastern Pacific. cussed. The presence of a third cusp on the lateral teeth ol Tropical deep-water Buecinidae are taxonomicaly a the radula is observed, compared to the same phenomenon in ratherpuzzlinggroup, nottheleast thespeciesbelonging Manaria Smith, 1906 and Coins Roding, 1786, andconsidered to Eosipho Thiele, 1929 and Manaria Smith, 1906. Both to be an atypical morphology within the group rather than a genera are very similar and it is still a question whether featurewarrantingadditionaltaxonomicseparation. Cantharus aldermenensis Powell, 1971 and related spe- AEdadsitteironnaPlackifeiycwords: Manaria, radula, variability, biodiversity. ctioesE,oisnicplhuodinogrtthoe nMeawn?asrpieac.iesWdeesfcorlilboewdhtehreeionp,ibneiloonngosf Bouehet and Waren (1986: 466, 469), retaining this spe- cies tentatively in the genus Eosipho. Strong evidence exists that the Eosipho aldermenensis group may consist of more than one species (Fraussen and Stahlschmidt, INTRODUCTION unpublished), and the description of the present new species is a first step towards answeringthis question. Thecoastal zoneolnorthto south-centralChile, strongly influenced bywind-driven upwelling, is one of the areas with the highest known primary production rates in the ABBREVIATIONS wthoerlsdou(tDhaenaesrtierent Paahc,if2i0c00O).ceCaonnsheaqrubeonrtslya, vtahsits apreelaagiocf JS: collection ofJavier Sellanes, Chile; KBIN: Koninklijk Belgisch Instituutvoor, Natuurwetenschappen, Brussels, and benthic biomass. However, in spite of proofthat the Belgium; KF: collection of Koen Fraussen, Belgium; benthic fauna is rich in endemic species, many species MNHN: Museum national d’llistoire naturelle, Paris, are still unstudied, undescribed, or unknown. Forabrief France; MNPINCL: Museo Nacional de Historia Natu- history and overview ofpast and recent expeditions and ral, Santiago, Chile; PS: collection ofPeter Stahlschmidt, malacological investigations offshore the Chilean coast we referto Fraussen and Sellanes (2008: 97). eRomhprtbyacshhe,ll.Germany; lv: live collected specimen; dd: Fraussen and Sellanes (2008) treated some deep-water species of the genus Aeneator Finlay, 1927 and a spe- cies from the Concepcion Methane Seep area (orCMSA) SYSTEMATICS belonging to the genus Kn/ptos Jeffreys in Dautzenberg and Fischer, 1896. The goal of this second paper is to Class GastropodaCuvier, 1797 continue adding to the knowledge of the Buecinidae Order NeogastropodaWenz, 1938 from off Chile with the description ofa new species and Subfamily Buecinoidea Rafinesque, 1815 Page 34 THE NAUTILUS, Vol. 126, No. I FamilyBuccinidae Rafmesque, 1815 cords, gradually becoming weaker, last part of body whorl almost smooth. Aperture oval, columella smooth, GenusEosipho Thiele, 1929 glossy, slightlycurved; outer lip thin, simple, edge sharp. Type Species: Chrysodomus (Sipho) smithi Schepman, Siphonal canal short, broad, open. 1911 (by original designation) (type locality: Indonesia, Operculum (Figure 8) small, thin, transparent,yellow- north ofPulau Talisei, Celebes Sea, 01°58' N, 125°00' E, ish brown, elongate; nucleus terminal, tip sharp. 165-1264 m, Sibogastn 122). Radula (Figures 19-21) typically buccinid. Central 1 tooth tricuspidwith rather rectangularbase. Lateral teeth Remarks: Members ofthe genus Eosipho mainly live variable, atypical ofgenus, principallybicuspidbutwith a in the Indo-West Pacific, with species known from the small additional intermediate cusp. Mozambique Channel in the west, along Indonesia to the Philippines in the east, from Japan in the north to Type Material: Holotype (MNI4NCL6677) (10.5 mm), New Zealand in the south. Eosipho smithi (Schepman, southern Chile, off Chiloe, about 42°S, in 500 m, del; 1911) and Eosipho aldermenensis (Powell, 1971) are Paratype 1 (MNHNCL 6678) (11.7 mm), same locality both widespread species. The latter was tentatively as holotype, eld; paratype 2 (KF 5442) (10.5 mm), same placed in this genus by Bouchet andWaren (1986: 469) locality as holotype, dd. Paratypes 3-4 (MNHNCL because of conchological affinities. In the present paper 6679-6680) (9.8-10.7 mm), Chile, offConcepcion, "Ant- we follow this opinion. Further study (Fraussen and arctic Intermediate Water’ Cruise, R/Y Vidal Gormdz, Stahlschmidt, unpublished) may involve the placement 36024.I2/ S, 73°36.44// W, in 606 m, lv; paratype 5 ofEosipho aldermenensis in the genus Manaria Smith, (KF 5443) (9.7 mm), same locality as paratypes 3 and 4; 1906 (type species: Manaria thurstoni Smith, 1906, by paratype 6 (MNI1N 24775) (11.8 mm), southern Chile, original designation, from “Gulf of Manar”, India). More off Taitao peninsula, INSPIRE Cruise, R/Y Melville, species with conchological characteristics similar to 46 54 15' S, 75°35.99/ W, in 497 m, lv; paratype 7 (PS Eosipho wereincludedby Shikama (1977: 16,pygmaeus), 150133) (11.0 mm), same locality as paratype 6, lv; Bouchet and Waren (1986: 467-469, coriolis, engonia paratypes 8-10 (KF 6579-6581) (10.7-12.2 mm), same , thorybopus), Okutani and Iwahori (1992: 149-250, locality as paratype 6, 2 lv, 1 dd; paratype 11 (KBIN) tosaensis), Fraussen (2001: 1-5, poppet) and Fraussen (11.5 mm), same locality as paratype 6, lv; paratypes and Hadorn (2005: 107-109, atlanticus) as well as mem- 12-28 (JS) (8.8-13.2 mm), same locality as paratype 6, bers from hydrothermal vents (Okutani and Ohta, 16 lv, 1 dd. 1993: 217-218, desbruyeresi Waren and Bouchet, 2001: 191, auzendai). ; Type Locality: Southern Chile, off Chiloe, around 42° S, upper continental slope, in 500 m. Eosipho zephyrus new species Range and Habitat: Onlyknown from the type mate- (Figures 1-10, 13-14, 17-21) rial. Detailed habitat data are not available, but two of the sites (off Concepcion andTaitaopeninsula), inwhich Description: Shell small for genus (up to 11.7 mm), the specimens were collected, have been identified as thin, rather fragile, snow white. Shape broad with short methane seep areas. Live collected shells are covered spire, whorls convex, suture distinct. Teleoconch con- with a thick, unidentified sponge-like mass (Figures 9, sistingof4 convexwhorlswithdistinctsuture. Protoconch 17-18). consistingof1 1/2 glossy, ratherconvexwhorls, tip small, whorls rapidly increasing, last whorl rather inflated, Etymology: Eosipho zephyrus new species is named resulting in a flattened protoconch. First teleoconch after the Greek god for the west wind Zephyrus, a name whorlwith 6 broad spiral cords, interspaces offine but used as a noun in apposition. The name is an allusion to deep lines. Secondwhorlwith 8, penultimatewhorlwith the easternmost occurrence ofthis species, far from the 10 or 11, broad, flat spiral cords; subsutural spiral cords ranges ofthe other congeneric species in the Indo-West slightly narrower than abapieal ones. Body whorl with Pacific, as ifitwere blown to the east bythewind. 22 spiral cords, 3 or 4 cords on siphonal canal; adapical interspaces fine, abapieal interspaces gradually becom- Comparative Remarks: Eosipho zephyrus new spe- ing broader; interspaces on base half as broad as spiral cies is characterized bythe broad shapewith moderately cords. Lasthalfofbodywhorloccasionallysmooth above short spire, the convex teleoconch whorls, the weak spi- periphery (paratype 2, Figures 3, 4) or entirely smooth ral sculpture consisting of flat cords and narrow inter- (paratype4, Figures 9, 10), butpossiblywith sometraces spaces, the broad and blunt protoconch with rapidly of interspaces visible near suture. increasing whorl size, greenish and rather smooth First teleoconchwhorlwith 22, secondwhorlwith 27, periostracum and small adult size. fine, slightly curved axial ribs, subsuturally rather weak, Eosipho zephyrus new species is variable in presence abapicallygraduallybecomingstronger; interspaces shal- ofspiralsculpture (presentorabsentonthe adapicalpart low, ratherbroad. Penultimatewhorlwith 18 (paratype 5) of the body whorl) and in number of axial ribs (18 to to 28 (paratype 2), body whorl with 25-27 such axial 28 ribs on penultimate whorl). K. Fraussen et al., 2012 Page 35 Figures 1-12. Eosipho species. 1-10. Eosipho zephi/ms new species. 1-2. Holotype, 10.5 mm, Chile, Chilean upper continental slope, in500 m, MN1INCL6677. 3—4. Paratype 2, 10.5 mm, same locality, KF 5442. 5-7. Paratype5, 9.7 mm, Chile, oilConcepcion, AIWCruise, 36°24.12' S, 73°36.44' W, in 606 m, KF 5443. 8. Operculum ofparatype 5, 2.2 mm, KF5443. 9. Paratype4, 10.7 mm, samelocality, MNPINCL66S0. 10. Sameshell, cleaned. 11-12. Eosiphoaldermenensis (Powell, 1971), 16.8 mm, East China Sea, off China, in 280-380 m, KF5244. The protoconch (Figure 13, 14) is quite atypical of is notunusualin Bueeinidae: Neptunea lidding, 1798with both Eosipho Schepman, 1911 and Manaria Smith, 3-7 lateral cusps (Golikov 1964: 17, 29-33; Fraussen and 1906. While species belonging to these genera have a Terryn, 2007: 21, 39, 64), Buccinum Linnaeus, 1758with protoconch consisting of gradually larger, convex whorls 2-6 lateral cusps (Golikov 1980: 54, 99-104), Prosipho (Figure 15, 16), the new species differs in having a big- Thiele, 1912 with 2-6 lateral cusps (Powell, 1951: 193; ger lastwhorl and a flattened appearance. Oliver and Picken, 1984: 96; Dell, 1990: 187). The pres- The radula ofEosipho zephyrus new species is atypi- ence of an additional median cusp in Cominellinae is calofCominellinae (containingbothEosipho Schepman, known in Manaria lirata Kuroda and Habe in Habe, 1911 and Manaria Smith, 1906) by the presence of a 1961 (Fraussen and Stahlschmidt, unpublished) and in third cusp on the lateral teeth (Figures 19-21). This Buccinulinae in Drepanodontus Harasewych and Kantor, additional cusp is usuallysmall to minute and appears to 2004 (Harasewych and Kantor, 2004: 7, 12, figs. 36-40). be an additional rather than a constant presence. Vari- Eosipho aldermenensis (Powell, 1971) (type locality: abilityinnumberofrachidiancuspswithinasinglegenus “E. ofthe Aldermen Islands, New Zealand, 366-475 m”) Page 36 THE NAUTILUS, Vol. 126, No. 1 Figures 13-21. Eosipho species. 13-14. Eosipho zephyrus new species, protoconch of holotype, scale bar = 300 micrometer, MNHNCL5866. 15-16. Eosiphoaldennenensis (Powell, 1971). Vanuatu (BOAO expedition, stationCP2319 ), MNIIN. Scale bar = 300 pm. 17-21. Eosipho zephyrus new species. 17-18. Paratype 3, 9.8 mm, Chile, off Concepcion, RIW Cruise, 36°24.12' S, 73°36'44W, in 606m, MNIINCL6679. 19-21. Radulaofholotype. Scale bar= 40 pm. (Figures 11-12, 15-16), awidespreadspecies in the Indo- 794 m) is similar in spiral sculpture (fine spiral West pacific, differs in having a smaller protoconch com- grooves), in variability (absence or presence of spiral pared to shell length, broader spiral cords with broader sculpture on the adapical part ofthe body whorl) and interspaces, a lower number of axial ribs and a larger periostracum (greenish and smooth) but differs in adult size. Some evidence may exist (Fraussen and having a slender shape with a high spire, a slightly Stahlschmidt, unpublished) thatseveral Indo-WestPacific longer siphonal canal, a lower number of axial ribs records assigned to Eosipho aldennenensis belong to dis- and a larger adult size. The protoconch of Manaria tinct species. Athorough studyofthis complexis beyond brevicaudata is unknown, all specimens studied by us the scope ofthepresentpaper, andweherebytentatively have eroded protoconch. regard “aldennenensis” as a group and we use this name for the Indo-West Pacific species. ACKNOWLEDGMENTS Manaria brevicaudata (Sehepman, 1911) (type locality: Borneo, north off Kagayan de Sulu Island, We are thankful to Philippe Bouehet and Virginie Heros Flores Sea, SIBOGA stn. 45, 07°24' S, 118°15' E, (Museum national d’Histoire naturelle, Pans, France) K. Fraussen et al., 2012 Page 37 for the loan of Eosipho aldermenensis material, and to Golikov, A.N. 1980. Buecininae mollusks oftheWorld Ocean. David Monseeonr (Belgium) for reading and correcting Faunaofthe USSR, Mollusks. USSR AcademyofScience the English text. We also thank the captain and crew 5(2): 1-465. of R/V Vidal Gormaz of the Chilean Navy and R/V Habe, T. 1961. Coloured illustrations ofthe shells ofJapan. 2. Melville, Scripps Institution of Oceonography. This Hoikusha, Osaka, 183pp. work was partially funded by FONDECYT projects No. Ilarasewych, M.G. and Y.I. Kantor. 2004. The deep-sea Bueeinoidea (Gastropoda: Neogastropoda) ofthe Scotia 1100166 and No. 1061217 to J.S. and COPAS center of Sea and adjacent abyssal plains and trenches. The Nauti- the University of Concepcion. FONDECYT project lus 118. 1-42. No. 1061214 to Praxedes Munoz, NOAA Ocean Explo- Okutani, T. and A. Iwahori. 1992. Noteworthy gastropods col- ration Program (via SCRIPPS Institution of Oceano- lected from bathyal zone in Tosa Baybythe R/V Kotaka- graphy, contract NOAA NA17RJ1231) and the Office of Maru in 1987and 1988. Venus 51: 235-268. Naval Research of the US Navy and the Census of Okutani, T. and S. Ohta. 1993. New buccinid and turrid Marine Life, through its field project COMARGE, gastropods from North Fiji and Lau basins. Venus 52: 217-221. provided extra funding for logistics and ship time. Oliver, P.G. andG. Pieken. 1984. 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