Table Of ContentVlLVENS Calliostoma ncherin.sp. NOVAPEX 1 (3-4) : 95-99, 20 oct. 2000
Description of a new species of Clanculus (Gastropoda: Trochidae)
from New Caledonia
Claude VlLVENS
Rue de Hermalle, 113 - B-4680 Oupeye, Belgium
[email protected]
KEYWORDS. Gastropoda, Trochidae, New Caledonia, Clanculus richerin. sp.
ABSTRACT. Clanculus richerin.sp. is described and comparedwith similar Clanculus species from the New
Caledonia area and fromAustralia.
RESUME. Clanculus richerin.sp. est décrite etcomparée avec des espèces analogues de Clanculus de la région
deNouvelle Calédonie etd'Australie.
INTRODUCTION Clanculus richerin.sp.
Figs 1-3
Thanks to Dr Philippe Bouchet (MNHN), I got the
opportunity to study some Trochidae collected by Type material.
various French océanographie expéditions around
New Caledonia during last 15 years. Among Chesterfield Plateau, New Caledonia area. CORAIL
Clanculus thomasi Crosse, 1863, C. stigmatarius A. 2, stn DW85, 19°12' S, 158°56' E, 32 m, holotype
Adams, 1853 and chiefly C. margaritarius (Philippi, MNHN (dd), 12x13.8 mm; stn DW153, 19°52' S,
MNHN
1846), occurs some trochids shells that I was unable 158°23' E, 45 m, paratype (dd), 13.8x15.5
to identify, although certainly belonging to mm; CHALCAL 1, stn DC49, 20°58'20" S,
MNHN
Clanculus. After further studies, I drew the 158°35'00" E, 48 m, paratype (dd), 12x13.8
conclusion that thèse trochids are anew species. mm.
Abbreviations Other material.
Repositories Chesterfield Plateau, New Caledonia area. CORAIL
MNHN : Muséumnational d'Histoire naturelle, Paris. 2, stn DW84, 19°12' S, 158°57' E, 16-26 m, 2 dd
(MNHN); stn DW134, 19°31' S, 158°22' E, 47 m, 1
Abbreviations from French océanographie dd(MNHN).
expéditions Lansdowne-Fairway Bank, Corail Sea. CORAIL 2,
DDCW::CWhaarrceontDDrreeddggee -stnCDHWA1L2C,A2L0°41,8'stSn,D1C661°23,6'21E°,4569'6m0," 1S,dd15(9M°3N0H'7N0)"
E, 48 m, 1 dd (MNHN). Atoll of Surprise, New
Others abbreviations Caledonia, stn. 458, 18°27'S, 163°02'E, 40 m, 1 dd
PI, P2, P3, ... : primary cords (PI is the most (MNHN).
adapical)
SI, S2, S3, ... : secondary cords (SI is the most Description.
adapical)
dd no live-taken spécimens présent in sample Shell ofmoderate size (height up to 14 mm, width up
:
lv live-taken spécimens présent in sample to 15.5 mm), trochoidal-turbiniform in shape
:
(concave shape forupperpart, convex for lower one),
spire rather depressed, ratio height/width from 0.87
SYSTEMATICS to 0.93 mm, apical angle from 80° up to 85°,
perforate.
Family TROCHIDAE Rafinesque, 1815 Protoconch ofone and quarter whorl, fairly smooth;
TROCHINAE
Subfamily Rafinesque, 1815 terminal lip sinuous.
Tribe TROCHINI Rafinesque, 1815 Teleoconch of6 convex whorls, beanng spiral cords,
Genus Clanculus Montfort, 1810 more or less conoid, body whorl becoming
Type species: Trochuspharaonius Linné, 1758, by cyrtoconoid. Suture visible, not canaliculated.
original désignation, Indian Océan First whorl ofteleoconch sculptured by three primary
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VlLVKNS Calliostoma ncheri n.sp. NOVAPEX 1 (3-4) : 95-99, 20 oct. 2000
cords; subsutural cord PI very weak, granular; other denticles, adapical denticle strongest. Pariétal tooth
cords P2 and P3 stronger, P2 granular and P3 présent, stronger than first umbilical denticle.
subgranular or almost smooth; cords deep pink or Colouroffour last whorls ofteleoconch orange, with
reddish coloured, dark regular spots on P2; distance whitish wide axial area extending from suture to P3;
between PI and P2 slightly smaller than between P2 two first whorls dark pink; inside of aperture
and P3; axial prosocline nblets Connecting granules nacreous; base of same colour as last whorls;
ofcords. umbilical area and columella white.
The three cords ail beaded on second whorl,
dismbuted in same way; beads well rounded. Discussion.
On third whorl, P4 appears partly above suture, with
same dark spots on pink ground as P2; others cords Clanculus richeri n.sp. can easily be distinguished
and areas orange; secondary cords SI (between PI from C. margaritarius (Philippi, 1846) (= C. unedo
and P2), S2 ((between P2 and P3) and S3 (between Adams, 1853) (Figs 6-7) C. margaritarius has a
:
P3 and P4) appeanng, thin, adapical two ones wavy higher spire, fewer spiral cords (5 or 6) on the whorls
and smooth, abapical two ones finely granular. P4 and the cords présent a différent colour pattern with
clearly visible on fourth whorl; P3 tends to acquire black spots on some of them. Clanculus richeri
same reticulated colour as P2 and P4; ail primary somewhat resembles C. clangulus (Wood, 1828), but
cords more or less similar m size; beads well C clangulus shows intervais between the cords wider
rounded, close packed; secondary cords of the same than the cords themselves, has an angulate penphery,
size, slightly smaller than primary cords, ail granular a wider umbilicus, an upper columella tooth and a
or subgranular. On fifth whorl, the three abapical bifid, not tnfid, basai columella tooth. C.
primary cords showing same pattern with altemate leucomphalus Verco, 1905 seems to be also similar,
pinkish white (2 or 3 beads) and reddish brown area but it îs smaller, has a higher spire, an upper
(only one bead); secondary cords of the same size, columella tooth and its granules are white. C.
slightly smaller than primary cords, granular with maugeri (Wood, 1828) îs bigger and has a more
rounded beads, uniformly orange. On last whorl, the angulate periphery; cords are reddish brown with fine
four primary and three secondary cords of similar white spots; the denticles around the umbilicus are
size; intervais between cords smaller than cords expansions of strong axial ribs located in the
themselves, with prosocline axial threads; PI and SI umbilical area.
closer than others; P2, P3 and P4 keeping their The description ofthe new species can remember the
spécifie pattern, reddish brown area on cords one of C. flosculus (Fischer, 1878) (Figs 4-5) from
becoming larger than one bead; additional secondary South Afnca, but C. flosculus differs from the new
cords S4, S5 and occasionaly S6 appeanng under P4; species by having a more elevated spire, a wider
granules of last abapical cords becoming quadrate. body whorl, a ratio height/width up to 1.15 and cords
Penphery oflastwhorl subangulate. that are alternating orange and articulated with
Aperture ovate, oblique; interior of outer lip with alternating black and white granules. In the same
spiral ridges; anal tooth présent in mature shells; geogaphical area, C. atricatena Tomlin, 1921 (Fig 8-
pariétal ridges présent, outermost more developped 9) seems also similar to the new species, but
small; edge ofouter lip with dark denticles at ends of C. atricatena has a convex shape, a subsutural cord
external spiral cords. Columella almost straight, wider than remaining cords on penultimate and last
oblique, recurved; basai toothprominent, with 3 whorls, larger space between cords and more
ridges; upper columella denticles présent, abapical numerous basai cords (15-20 instead of8-9).
one sharper than others. Base slightly convex, with 8
or 9 beaded spiral cords; granules more quadrate Etymology.
toward umbilicus; some cords (usually fourth and at
least the one nearest umbilicus) showing same colour At Dr Philippe Bouchet request's, the new species is
pattern as P2, P3 and P4 on whorls; space between named after Bertrand Richer de Forges (IRD [ex-
cords much smaller than cords. Umbilicus open to ORSTOM], Nouméa Center, New Caledonia), who
apex, surrendedby inductural callus, borderedby 5 leaded the océanographie expéditions in New
Caledonia area.
Figures 1-5.
1-3. Clanculus richerin.sp., holotype MNHN, Chesterfield Plateau, New Caledonia area, 12x13.8 mm.
mm
4-5. Clanculusflosculus (Fischer, 1878), neotype MNHN, Seychelles, CerfIs. group, 12.2x11
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VlLVENS Calliostoma richerin.sp. NOVAPEX 1 (3-4) : 95-99, 20 oct. 2000
Vil \l \s Calliostoma lichen n.sp. NOVAPEX 1 (3-4) : 95-99, 20 oct. 2000
ACKNOWLEDGEMENTS. revision and supragenenc classification of
trochacean gasteropods. NaturalHistory Muséum
I would like to thank hère P. Bouchet (Muséum ofLos Angeles CountyScienceSéries VI+169 pp.
national d'Histoire naturelle de Pans) who kmdly Jansen, P. 1995. A review ofthe genus Clanculus in
gave me the opportunity to study matenal ofMNHN Australia, with description ofa new subspecies
expéditions in New Caledonia and also gave me and the introduction ofa nomen novum. Vita
access to and to the malacological ressources of the marina 43(l-2):39-62.
MNHN. I am also very grateful to V. Héros (MNHN) Marshall, B.A. 1995. Calliostomatidae from New
for the kind attention she gave to ail my enquines for Caledonia, the Loyalty Islands and the northem
searching vanous scientific papers and types, and, Lord Howe Rise. In A Crosnier & P. Bouchet
:
finally, to R. Houart for his comments on the (eds), Résultats des Campagnes MUSORSTOM,
manuscnpt and his alwaysjudicious advices. Volume 14, Mémoires du Muséum national
d'Histoirenaturelle 167:381-458.
Références. Marshall, B.A. 1998. A review ofthe Récent
Trochini ofNew Zealand. Molluscan research
Herbert, D.G. 1993. Revision ofthe Trochinae tribe 19(1):73-106.
Trochini in Southern Africa. Annals oftheNatal Wilson, B. 1993. Australian marineshells. Odyssey
Muséum 34(2):239-308. Publishing, Kallaroo (Australia). 408 pp.
Hickman, C.S. & Me Lean, J.H. 1990. Systematic
Figures 6-9.
6-7. Clanculus margaritanus (Philippi, 1846), New Caledonia, St Vincent's Bay, coll. B.RicherORSTOM,
12x10.5 mm.
8-9. Clanculus atricatena Tomhn, 1921, South Africa, Natal, Shovas Rock, author's coll., 14.4x17.6 mm.
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VlLVENS Calliostoma richerin.sp. NOVAPEX 1 (3-4) : 95-99, 20 oct. 2000
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