R. HOUART NOVAPEX 1 1(1 ): 21-27, 20 mars 201 A remarkable new species oiZacatrophon Hertlein & Strong, 1951 (Gastropoda: Muricidae: Ocenebrinae) from the Guif of California HOUART Roland Research Associate, Institut royal des Sciences naturelles de Belgique rue Vautier, 29, 1000 Bruxelles, Belgium. [email protected] KEYWORDS. Gastropoda, Muricidae, GuifofCalifornia, Zacatrophon, new species. ABSTRACT. Zacatrophon skoglundae n.sp. is described from the Guif of California and compared with Zacatrophon beebei (Hertlein & Strong, 1948), Aiistrotrophon cerrosensis (Dali, 1891) and A. catalinensis (Oldroyd, 1927). The radula characters are illustrated for Forreria Jousseaume, 1880, Zacatrophon Hertlein & Strong, 1951 andAiistrotrophon Dali, 1902. The three gênera are mcluded in Ocenebrinae Cossmann, 1903. RESUME. Zacatrophon skoghmdae n.sp. est décrit du Golfe de Califomie et est comparé à Zacatrophon beebei (Hertlein & Strong, 1948), Aitstrotrophon cerrosensis (Dali, 1891) et A. catalinensis (Oldroyd, 1927). Les caractéristiques de la radula sont illustrées pour Forreria Jousseaume, 1880, Zacatrophon Hertlein & Strong, 1951 et Austrotrophon Dali, 1902. Les trois genres sont inclus dans les Ocenebrinae Cossmann, 1903. INTRODUCTION SYSTEMATICS The new species described herein was previously Family MURICIDAE Rafmesque, 1815 published as Forreria (Zacatrophon) beebei (Hertlein Subfamily OCENEBRINAE Cossmann, 1903 & Strong, 1948) by Myers & Hertz (1990). After a GenusZacatrophon Hertlein & Strong, 1951 careful study ofmany spécimens and comparison with Type species by original désignation: Trophon the type species ofZacatrophon, it tumed out to be a (Zacatrophon) beebei Hertlein & Strong, 1948, new species. Récent, GuifofCalifornia.. Repository Zacatrophonskoglundae n. sp. Figs 1-6 ANSP: Academy ofNatural Sciences ofPhiladelphia, U.S.A. Material examined. The holotype and 12 paratypes CAS: California Academy ofSciences, San Francisco, from the Skoglund Collection were examined and U.S.A. distributed to the following muséums and private IRSNB: Institut royal des Sciences naturelles de collections: SBMNH Belgique, Bruxelles, Belgium. Holotype 423912. MNHN: Muséum national d'Histoire naturelle, Paris, Paratypes: 1 ANSP 423438; 1 CAS CASIZ 182027; 1 France. IRSNB IG 31.468/MT2241; MNHN 22716; 1 SBMNH: Santa Barbara Muséum ofNatural History, SBMNH 423913; USNM 1133478; 2 RH (no 1 California, U.S.A. registration number) (ail from the type locality); 4 CS USNM: National Muséum of Natural History, (no registration number), from three miles SE of Washington, D.C., U.S.A. Punta San Antonio, Sonora, Mexico. Dredged, 60 to CS: coll. Carol Skoglund 90 m, by Paul & Carol Skoglund Nov. 1982 DP: coll. Don Pisor RH: coll. Roland Houart Type locality. GuifofCalifornia, Baja California Sur, Mexico, brought in San Juanico by shrimpers. Other abbreviations Other material examined. Zacatrophon skoghmdae IP: Infrasutural primary cord (primary cord n.sp.: GuifofCalifornia, Baja California Sur, Mexico, on subsutural ramp) San Juanico taken by shrimpers (4 spécimens, 54 to mm PI Shouldercord 70.5 in length, CS); Near Loreto, Baja California : mm P2-P3 : Primary cords ofthe convex part ofthe Sur, Mexico (1 spécimen, 64 in length, CS). teleoconch whorl Zacatrophon beebei: GuifofCalifornia (1); Cabo San Lucas, Guif of California (1); Ceralbo Island, West 21 R. HOUART A iviiiarkablc ncw spccics o\'Zaccitrophon Mexico (24°18'5r'N; l()y^'55'3()"W) (2) (ail coll. Kli); Aperture large, broad. roundcd. with adapical portion Cabo San Lucas, Uiilt'orC'alifornia, divcigcd 46 m (5) slarting al base of preceding whorl. Columellar lip (coll. rS)(Figs 7-13). broad. eniirely smooth. rim completely adhèrent. Aiistrolrophon cerrosensis: (iiilt of C'alilbriiia (I) Outer lip smooth, with smooth surface within. (coll. RH); OtT Ccdros Island. Baja Calilbmia (3) Siphonal canal long, broad, straight or weakly dorsally (coll. CS)(Figs 14-16). curved, broadly open, with low axial lamellae over Aiistrotrophon catalinensis: San Pedro, Calilomia (I) whole length. (coll. RH): Catalina Island, California (I); Baja Operculum and radula unknown. California, 27 2K.3' N. I I4"57.()'W, 110 m (I); OtT San Diego, California, 77 m (!) (ail coll. DP) (Figs Remarks. Compared to Zaccitrophon heehei (Figs 7- 17-18). 13. 21-23). the only other représentative ofthe genus, Aiistrotroplioii sp. OITNW Isia Smith, Bahia de Los Z. skoglundae n.sp. lias broader. fewer, and more Angeles, Baja California, Mexico, dredged 183 m strongly developed, tlat, shoulder spines (8-10 v.s 10- (CS) [as Trophon (Aiistrotrophon) cf. cerrosensis in 15 in Z. heehei), less convex teleoconch whoris, Skogliind(l988: 115, Fig. 10)] (Figs 19-20). especially remarkable at the last whorl, and more strongly developed axial lamellae. The new species mm Description. Shell large for the genus, up to 72 in apparently also reach a larger size. length at matiirity. length/width ratio 1.7-2.2:1. Zacatrophon skoglundae n. sp. ditTers from SIender, elongate, narrow, lightly built. Subsutural Aiistrolrophon cerrosensis (Figs 14-16, lA-lb) and A. ramp broad. tabulate, weakly convex. catalinensis (Figs 17-18, 27-29. two species assigned Creamy-white, light tan or tan. Fiat lamellae of last to Aitstrotrophon Dali, 1902, a related genus, in teleoconch whorl usually vveakiy darker colored. having the typical loosely coiled teleoconch whoris Lighter coloiired spiral band at adapical extremity of with deeply impressed suture, and a tabulate siphonal canal. Aperture glossy white. subsutural ramp, typical features of Zacatrophon. Spire high, up to 5 or 5.5 narrow, strongly shouldered, Moreover, it also differs from A. cerrosensis in the spinose, loosely coiled whoris. Suture deeply absence of obvions spiral sculpture, in the more excavated, strongly impressed. Protoconch unknown, numerous axial lamellae (8-10 vs 6-8) and in the broken in ail examined spécimens. Axial sculpture of strongly upward curved and flatter shoulder spines. teleoconch whoris consisting of low, broad, tlattened From A. catalinensis it also differs in the more lamellae, more strongly developed at shoulder, numerous and less developed axial lamellae, more producing short or long, broad, flat, guttered, spinelike strongly upward curved, less developed spines, and projections. First teleoconch whorl eroded in ail comparatively smallersize. examined spécimens: second whorl with 10 or II ribs with small, broad, shoulder spinelets; third whorl with Etymology. 1 am very pleased to name that species for 9 or 10 tlat, almost undistinguishable ribs with flat, Carol Skoglund who kindly put many of her open spinelets at shoulder: fourth whorl with 8-10 flat spécimens at my disposai for study. lamellae, producing short or long, tlat spinelets at shoulder; last whorl with 7-10 low, tlat, axial Discussion. Zacatrophon, Austrotrophon, Forreria lamellae, generally ending as long, upward curved, and the species related to thèse taxa were the subject flat. guttered, open, spinelike projections at shoulder. ofseveral différent assignations: Spiral sculpture consisting ofPI, and when présent, of - Hinds (1844: 127) described Murex belcheri. It was very low, almost undistinguishable P2 and P3 on assigned toForreria by Jousseaume (1880: 335). second and third whorl. Other whoris smooth or with - Dali (1891: 181) described Trophon cerrosensis and very low, broad, concentrated, spiral cords, extending assigned it later to Austrotrophon as Trophon also on siphonal canal. Subsutural ramp smooth, (Austrotrophon) cerrosensis (Dali, 1902: 549). except axial lamellae. Figures 1-16 1-6. Zacatrophonskoglundae n.sp. 1-3. GulfofCalifornia, Baja California Sur, Mexico, brought in San Juanico by shrimpers Holotype SBMNH 423912, 72 mm: 4-5. paratype, same locality, MNHN 22716, 41.8 mm: 6. paratype, same locality, USNM mm 1133478,41.6 7-13. Zacatrophon beebei (Hertlein & Strong, 1948) 7-9. Cabo San Lucas, GulfofCalifornia, dredged 46 m, (CS), 47.5 mm: 10-11. Ceraibo Island. West Mexico (24°18'51"N; 109°55'30"W), (RH), 40.9 mm: 12. Protoconch (CS), scale bar0.5 mm; 13. Operculum (CS), scale bar2 mm. 14-16.Austrotrophon cerrosensis (Dali, 1891) 14-15. OffCedros Island, Baja California, (CS), 35 mm; 16. GulfofCalifornia, (RH), 52.2 mm. 22 R. HOUART NOVAPEX 1 1(1 ): 21-27, 20 mars 201 23 R. HOUART A rcmarkable new spccics o\'Zacciliophon - Oldroyd (1927: 29) describcd Trophoii as SLibgcnus of Trophon Montrorl, 1810 tbr Trophon (Austiotrophon) cataliiwnsis tVom San Podix>, (Zacatrophon) hechei (Herticin & Strong, 1951: 86). Calitbmia. - Keen (1971: 537) inckidcd Zacatrophon and - Hcrllcin & Strong (1948: 79) describcd Troplwn Austiotrophon in Trophoninae as subgcncra of hi'fhei. Three years later tlic\ proposcd Zacaiiophon Trophon. The gcniis Forrcria vvas nol discussed. Figures 17-20 17-18.Austrotrophon catalinensis (Oldroyd, 1927) 17. San Pedro, Califomia, (RH), 80.2 mm; 18. Catalina Island, California, (DP), 56.9 mm. NW 19-20. Austrotrophon sp. Off Isla Smith, Bahia de Los Angeles, Baja Califomia, Mexico, 183 m, (CS), 36.9 mm. - Abbott (1974) included Forreria in Rapaninae latter, absent in Zacatrophon andAustrotrophon. (1974: 171) and Zacatrophon and Austrotrophon in - Kool (1993) illustrated shell, operculum and radula Trophoninae, as subgenera ofTrophon (1974: 191). characters oi Forreria (1993: 164, fig. ID; 228, fig. - Radwin & D'Attilio (1976: 176) listed ail thèse taxa 26) and noted that phylogenetic analysis revealed in Thaididae. close relationship among Ocenebrinae Cossmann, - Vaught (1989: 45) listed thèse taxa in Rapaninae. 1903 and Forreria, and excluded it from Rapaninae. - Myers & Hertz (1990) illustrated radula and - McLean (1996: 82) followed Kool (1993) and placed operculum characters oïZacatrophon and included the Austrotrophon in Ocenebrinae. three taxa in Thaidinae. They also considered - Vokes (1996: 6) Also included Austrotrophon and Zacatrophon and Austrotrophon as subgenera of Zacatrophon in Ocenebrinae but retained both as Forreria notwithstanding the strong labral tooth in the subgenera oïForreria. Figures 21-28. SEM ofradulae 21-23. Zacatrophon beebei (Hertlein & Strong, 1948), Mexico, Sonora, Guaymas, 27°52'12" N, 1 10°50'60" W, SBMNH 93431 (scale bars: 100 yvm). lA-lb.Austrotrophon cerrosensis (Dali, 891 Mexico Baja Califomia, Bahia Sébastian Vizcaino; dredged 1 ), Latitude: 28°26'30" N, 114°35'60" W, SBMNH 93378 (scale bars: 24-25: 100 ^m; 26: 200 ^m). 27-28.A. catalinensis (Oldroyd, 1927), California, Los Angeles County, San Pedro Bay, 33°40'40" N, 1 18°17'32" W, SBMNH 100258 (scale bars: 27: 100 |.im; 28: 200 nm). 24 R.HOUART NOVAPEX 1 1(1 ): 21-27, 20 mars 201 25 . R. HOUART A rcmarkablc iicw spccics ofZacalr<>/>li<)ii The radula o\' Zimilrophon. Austrotrophoii and Proceedings ojthe U.S. National Muscuni Funerlii (Figs 21-32) is closcly rclatcd tu 24(1264): 499-566. Ocenebrinac. ha\ing the rachidian looth with a Hertlein, L.G. & Strong, A.M. 1948. Descriptions ofa projecting central ciisp, a long latéral cusp with inncr new species ofTrophon from the Guifof and oiiter latéral denticles on base, several marginal California. Bulletin ofthe South California cusps and an ob\ious marginal cusp, as scen in AcademyofSciences 46(2): 79-80. Ocenehra Gray, 1847 (Figs 33-34) and Niicclla Hertlein, L.G. & Strong, A.M. 1951. Eastern Pacific Rciding. I79S (Figs 35-36). expéditions ofthe New York Zoological Society. Due to close relationship of sliell, operculum and Mollusks from.the west coast ofMexico and radula characters in (kciichra, Niicclla, Fonciia. Central America. Pt. 10, vol. 36(2): 67-120. Zacairopho)} and Aiistrotrophon (except the présence Hinds, R.B., 1844. Descriptions ofnew species of ofa labral tooth in Forrcria), 1 will aiso follow Kool Scalaria and Murex from the collection ofSir (1993) and McLean (1996) and group ail thèse taxa as Edward Belcher, C.B. Proceedings ofthe separate gênera within Ocenebrinac. ZoologicalSocietyofLondon (1843), 12:124-129 Keen, A.M.1971. Sea Shells ofTropical West ACKNONVled(;e.vients America, 2d Ed. Stanford University Press, Stanford, Calif, 1064 pp. 1 am \ery gratcfui lo Carol Skoglund, Phoenix, Jousseaume, F. 1881. Diagnoses de mollusques Arizona, U.S.A for the loan and gift of many nouveaux. Le Naturaliste44: 349-350. spécimens from her collection, and for the correction Kool, S.P. 1993. Phylogenetic analysis ofthe ofthe tlrst draft ofthis paper. I am also most indebted Rapaninae (Neogastropoda: Muricidae). to Henry W. Chaney and to Daniel Geiger, Santa Malacologia 35{2): 155-259. Barbara Muséum of Natural History, California, McLean, J.H. 1996. Taxonomic Atlas ofthe benthic U.S.A., forextracting the radulae and for the Scanning faunaofthe Santa Maria Basin and Western Santa Electron Microscope photographs of Zacatrophon, Barbara Channel. Vol. 9 - The Moliusca Part 2 - Aiistrotrophon and Forrcria, and to Anders Warén The Gastropoda - The Prosobranchia. Santa (Natural History Muséum, Stockholm, Sweden) for Barbara Muséum ofNatural History: 1-160. préparation and SEM work ofthe radulae ofOcenehra Myers, B.W. & Hertz, CM. 1990. Forrcria and Niicclla). Thanks also to H.W. Chaney and to (Zacatrophon) beebei(Hertlein & strong, 1948) Virginie Héros (Muséum national d'Histoire naturelle, (Muricidae: Thaidinae). TheFestivus 22(4): 32-36. Paris, France), for bibliographie research, and to Don OIdroyd, l.S. 1927. The marine shells ofthe west Pisor, San Diego, California, U.S.A for the loan of coast ofNorth America. Stanford University some comparative material. Publications, Univ. séries, Geological Science, vol. 2, Gastropoda, Scaphopoda and Amphineura, pt. 2, REFERENCES pp. 1-304, pis. 30-72 Radwin, G.E. & D'Attilio, A. 1976. Murex Shells of Abbott, R.T. 1974. American Seashells, 2nd. Ed. Van the World. An illustrated guide to the Muricidae. Nostrand Reinhold, N.Y., 663 pp. Stanford University Press, Stanford, 284 pp. Dali, W. H. 1891. Scientiflc results ofexplorations by Skoglund, C. 1988. Deep watershells from offIsla the U.S. Fish Commission steamer "Albatross". Smith, Bahia de Los Angeles, Baja California, XX. On some new or interesting West American Mexico. The Festivus 20(1 1): 1 10-1 16. shells obtained from the .. "Albatross", 1888, and Vaught, K.C.1989. A Classification ofthe Living from othersources. Proceedings ofthe U.S. Moliusca. American Malacologists, Melbourne, NationalMuséum 14(849): 173-191 Fia, i-xii, 189 pp. Dali, W.H. 1902. Illustrations and descriptions ofnew, Vokes, E.H. 2002. One last look at Muricidae. unfiguredor imperfectly known shells, chiefly American Conchologist24(4): 4-6. American, in the U.S. National Muséum. Figures 29-36. SEM ofradulae 29.Austrotrophon catalinensis (OIdroyd, 1927), California, Los Angeles County, San Pedro Bay, 33°40'40" N, 1 18°17'32" W, SBMNH 100258 (scale bars: 200 ^m). 30-32. Forreriabelcheri (Hinds, 1844). California, Los Angeles County, 33°42'0" N, 1 18°16'0" W, SBMNH 99550 (scale bars: 200 \im). 33-34. Ocenehra erinaceiis (Linnaeus, 1758), France, Brittany, Oleron (RH) (scale bars: 33: 10 |.im; 34: 20 \im). 35-36. Nucella heyseana Dunker, 1882, Korea, Sokch'o (RH) (scale bars: 35: 100 )um; 36: 10 uni). 26 R. HOUART NOVAPEX 1 1(1): 21-27, 20 mars 201 27