B ASTERIA, 70: 97 -100, 2006
a species from the Marquesas Archipelago -(Gashopoda, Caenogastropoda, Nassariidae)
Nsssaius tangaroai spec. nov.,
H.H. KOOL Magnolialaan2l,NL695lNVDieren,TheNetherlands;
[email protected]
of an undescribed species of Nassarius were collected during the Expédition NtUSOnSfON,t S by the Muséum nationale d'Histoire naturelle, Paris. This species is described here as Nassarius tangaroai sPec. nov' specimens
Key words: Gastropoda, Caenogastropoda, Nassariidae, Nassarius, taxonomy, Pacific, Marquesas Archipelago.
During the Expédition MUSORSTOM 9 by the lVluséum nationale d'Histoire
Naturelle, Íaris, specimens of an undescribed specie s of Nassarius were collected from the Marquesas Archipelago.
HHK collection H.H. Kool, DiererL The Netherlands; MNHN, Muséum national d'Histoire naturelle, Paris; RMNH, Nationaal Natuurhistorisch Museum Naturalis, LeiderU The Netherlands; ZMA, Zoölogisch Abbreviations for collections:
Museum, University of Amsterdam, Amsterdam, The Netherlands'
I
t
Nassariinae Iredale, 1916 Nassarius
Duméril
1806
Nassarius tangaroai sPec. nov. (figs 1-6) Material examined (holotype and paratypes).- The coordinates are preceded by the station codes' Marquesas Archipelago, campagne MUSORSTOM 9, 1997' DW 1224, 9"44.6'3 138.51.1'W, 1L5-120 m, 30.viíi.1997
(MNHNAolotype [no numberl e,36; ZMA
140'06',W 200 m, 22'viií.1997 DR 1183, 8"45.5',S (MNHN/7); 26.viii.1997 (MNHN/1); DR 1182, 8.45.6',5 140.03.9',W 90-120 m, 28.vii.1997 500-525 139'10',W 1207,9'51',S DW (MNHN/g); m, 26.viii.1997 140.03.8'W, 86-120 (MNHN/35; H. Dekker, winkel, The Netherlands/1; HHK 259.0211\; DW 1208, 9'48.9',5 139'09.s',W, 117 m, 28.viií.r997 (MNHN/2); DW 1210, 9"50.4',s 139'00.5'w, 98-100 m, 29.viii.1997 (MNHN/1); DR 1223, L05-285 m, 9"44.5,5 138.51.3,W, 90-150 m, 3O.viii.\997 IIUNHN/21); DW 1235, 9'42.0'3 139"03.0'W
4.06.01412; RMNH.MOL.105119/1;
HHK
127.01.13);
Dw
11,46, 9'19',S
m,
1242, 10'28.1',S 138"41.1',W 119-122 m, 01.ix.1997 (MNHN/s); DR 1246, m, 01.ix.1997 (MNHN/1); DR 1242 10"34',5138"42',W,1150-1200 m, 01"ix'1997 10"28.9',S 138.35.9',W 90-130
30.viii.1997 (MNHN/a);
DW
(MNHN/4).
Description oÍ the holotype.- shell height 16.7 mm, width 7.4mm. Protoconch with semi-transpar;nt whorls, lastlYzkeeled. Teleoconch of 5 7z convex whorls. She[ ra]ther thick, somewhat shiny, Íirst 2Yz teleoconch whorls with about 13 low ribs, 31/z-33/+glaËsy,
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BASTERIA, Vot. 70, No. 4_6, 2006
beginning to disappear on the third whorl. Lower whorls with microscopic growth lines. s1tule somewhat ledged, followed by one prominent subsutural g.oorr". Èase of body whorl with 5 spiral grooves, intersecting witn g-+ low, axial ribs neaödge of apertural Hf. , Jvlargin of outer lip thick, smooth, with narrow edge of callus. Lowàr *u.gi., u*p*àed. Basal cords, formed by_ the spiral grooves, endingfn blunt denticl", or, oiouter lip. Inside "àg"Siphonal lip with about 11 evenly-spàced, well-deve'Íoped lirae oÍ equal heighï. area with about six non-equidistant, wide grooves. Insiàe base of columella ríitn t*o pronouncedlidges, with lower ridge occasionally forming a thickening at the end of the'columella. Columellar callus well bordered. Paiietal toÀ strong, anàt canal narrow. Basic colour creamy with two more or less distinct interrupted spiíil bands of brown flecks, occasinally axially connected. outer lip, siphonal ur"u ,rrà columella white, aperture cream.
the-species.- The depth at which the specimens ,between . HubrJllof 100 and 1200 m. In the sample with the holotype, Írom
were obtained varies
115-120 m, are some spec-
imens with a yellowistr, serrated opèrculum. . Etymology.- The new specieJ is named after the Polynesian sea-god who separated the sky from the earth. Variability. - The size of the shells varies from about 11 to 20 mm. The prominent subsufural spiral groove is_occasionally followed by another faint groove. Thle colour varies from creamy white, with some scattered faint biown flecks, to ríore brownish and specimens that tend to be banded like the holotype. Discussion.- Nassarius tangaroai spec.'nov. is conchologically most similar to the fol-
lowing species.
Nass.arius comptus (A. Adams, 18s2). According to Cernohorsky (19g4: 146) this species (with several-slmonyms) is characterized by a ,,slender to bróadly ovate,, shell. The figure of the hototy-pe.(Cemohorsky, 1984: pr'.29 fig. l.; Kaicher, 19"g3: card 3493) shows a rather ovate shell with strongly.ibb"a eariy whorË, without a subsutural g.oorr". Nassqrius cinnamomea (A.,Adams, rasi) from the philippines and the RyuKyu IsËnds is mentiorred by CemohorsY g2l!, pt,29 fig. 6) as óni of the sl.nonym s óÍ N. comptus. \!9: According to Kase & Kinjo (1996: 199),- N . ciniamomea "is distincí fr om N . (Z) comptus in its slenderer shell form, much finer axial ribs in the apical whorls, the presence of a subsutural collar in the whorl surface..". In his descriptión of the species, bernohorsky says that Nass.arius has "only occasionally" a subsutural g.oà.*r" or cord. This conclu-comptus sion might be based on a faultysynonyrnisation because in th"e figures of the type no subs1t-ur-al cord or Sroove can be observed. Nassarius tangaroai rp"".".,orr. is a slender species with low axial ribs on the apical whorls and with a stiong su'bsutural groove. Nassarius haldemanni (Dunkea 1847) (figs 7-9) has a àark brown p"rotoconch in fresh specimens and numerous very fine axial and spiral ribs on the fiist 3-4 poshruclear whorls. It has also a subsutural groove. The holotype is Íigured in CernohorsËy (1980: pl. 28 fig.10). . Nassarius multipunctatus (Schepman, 1911) is more slender, has a thinner shell than the new species and has. a different pattem oi lighter and darker tints . The lectotype is figured in Cemohorsky (1980: pL.22 hg.1).
ACKNOWLEDGEMENTS Thanks are due to Dr P. Bouchet (MNHN) who enabled the author to study a part oÍ
i
I
Koo/: Nns.snllrrs tnrtgaroai sltec.
rtoz,.
front tltc Mnrquesos Archiltelngo
99
Figs 1-9. Nassarlrrs spec. 1-6, N. lairraroni spec. nov. 1-3, holotypc (MNHN), Expeciition MUSORSTOM 9, Si. DW 1224, Marqucsas Archipelago, 9'-1.1.6's 138'51.l'W 1 15-120 m, 30.r,iii..t997; 16.7 , T.l mm.4-6, paratype
(MNHN) from same Jocation; 11.2 x 5.3 mm. 7-9, N.lnlLfunntnri(Dtrr.rkcr, 18-17), Inclonesia, Celebes Sea, N. sularvesi, eastsiclc of Pulau Dalangan,0l'21'22"N 120"53'87"E, t3-.10 m; 12.9 , 6.3 mm (IIHK 87,1.0'l).
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BASTEKIA, Vol.70, No. 4-6, 2006
the las:3liid -species, collected during several expeditions; to Mrs. virginie Héros (lvÀIfiltl) for the communication with the Museum àna Oetptine Brabant fim,lfnq fo. $u- Phgbqulhs of which H. Dekker made the composition?or this publicaàon. I thank R. Moolenbeek (ZVÍA) forhis enduring support. REFERENCES CERNOHORSKY, W.O., 1984. Systematics of the family Nassariidae (Mollusca: Gastropoda). of the Auckland Institute and Museum L4: i-iv, L-356.
KAICHE& S.D.,
1983.
-
Butletin
Card catalogue of world-wide shells. Pack #34. Nassariidae part trL cards
31153-
3558.
KASE T., & H. KINJQ 1996. Anassariid gastropod from the submarine caves oÍ Okinawa.
-
Venus 55:
t99-205. SCHEPMAN, M.M., 1911. Ïhe Prosobranchia of the Siboga Expeditioq Mollusca B IV, Raóiglossa. Siboga-Expeditie 58 (49d): 242 -364.
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