Description of a new species of Cantrainea (Gastropoda: Turbinidae: Colloniinae) from Guadeloupe

4 Pages·2001·1.5 MB·

by  Claude Vilvens

VlLVENS Cantraineayoyottein.sp. Novapex 2 (4): 153-156, 20 déc. 2001
Description ofa new species of Cantrainea
(Gastropoda: Turbinidae: Colloniinae)
from Guadeloupe
Claude VlLVENS
Rue de Hermalle, 1 13 - B-4680 Oupeye, Belgium
[email protected]
KEYWORDS. Gastropoda, Turbinidae, Guadeloupe, Colloniinae, Cantrainean. sp.
ABSTRACT. Cantraineayoyottein.sp. from Guadeloupe is described and compared with similar
turbinid species belongingto genus Cantrainea and Homalopoma, subfamily Colloniinae.
RESUME. Cantraineayoyottein.sp. de Guadeloupe est décrit et comparé avec des espèces
analogues de Turbinidae appartenant aux genres Cantraineaet Homalopoma, sous-famille des
Colloniinae.
INTRODUCTION Genus: Cantrainea Jeffreys, 1883
Type species: Turbopeloritanus Cantraine, 1835 (by
A few month ago, Dominique Lamy, a well known monotypy) - Plio-Pleistocene fossil (Sicily) and
shell collector from the French West Indies, entrusted Récent (Mediterranean Sea and GulfofBiscay).
me with turbinid-shells from deep water off
Guadeloupe. Thèse shells obviously belongs to a Cantraineayoyottein.sp.
group of Turbinidae classified in Homalopoma Figs 1-4
Carpenter, 1864 genus and related gênera (Collonista
Iredale. 1918; Bothropoma Thiele, 1921; Cantrainea Type material
Jeffreys, 1883 and so on). This group of species,
known as Homalopomatinae by several authors Guadeloupe, off Pigeon Is., in 550 m, holotype
(Keen in Knight et al., 1960; Me Lean in Keen, 1971; MNHN, 17.6x20.4 mm (dd); 1 paratype IRSNB, in
Boss, 1982), is now included in Colloniinae 500 m, 18.3x22.0 mm (dd); 1 paratype collection D.
Cossmann, 1916 (Hickman & Me Lean, 1990). This Lamy*, in 600 m, 20x23 mm (dd),
subfamily has a Worldwide distribution, from
intertidal to bathyal depths. Diagnosis
Identification of Lamy's shells needed further studies
through species from différent areas. Thèse studies A typical Colloniinae (Homalopoma-Wke) species,
showed that thèse shells belonged to a species but rather large for this subfamily, without umbilicus,
différent from any other onel knew and remained with about 12 to 14 spiral cords on last whorl, an
undescribed. The genus Cantrainea seems to be the obvious keel on shoulder at first third of the whorl
most appropriate. and a rounded aperture.
Abbreviations Description
Repository Shell oftall size for the genus (height up to 20 mm,
IRSNB : Institut royal des Sciences naturelles de width up to 23 mm), rather thick, larger than high,
Belgique, Bruxelles. turbinate in shape; spire rather elevated, 2.2 higher
MNHN : Muséum national d'Histoire naturelle, Paris. than aperture in mean, last whorl showing concave
adapical part and convex abapical part, anomphalous.
Others abbreviations Protoconch smooth or with only minute
PI, P2, P3, ...: primary cords (PI is the most irrégularités, of about 1.5 to 2 whorls (number
adapical) actually difficult to count accurately, because of
SI, S2, S3, ...: secondary cords (SI is the most roundly perforated apex, probably eroded. on the
adapical) available spécimens). Terminal varix indistinct.
dd : no live-taken spécimens présent in sample Teleoconch ofabout 3.5 whorls, bearing spiral cords
Iv : live-taken spécimens présent in sample and prosocline threads, with one shoulder. Suture
visible, not canaliculated.
SYSTEMATICS
Family: TURBINIDAE Rafinesque, 1815
* Antilles Mollusques, 6 Lotissement Bel-Air, 97122
Subfamily COLLONIINAE Cossmann, 1916
: Baie-Mahault, Guadeloupe - French West Indies
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Vil \l \s Cantraineayqyottein.sp. Novvn X2(4): 153-156,20déc. 2001
First whorl ofteleoconch slightl) convex, with three a more elevated spire without obvions spiral cords.
smooth primai) spiral cords, poorlj marked but Also Cantrainea panamensis (Dali, 1908), from
broad, similar in size, P2 much closer to P3 as to PI tropical Hast Pacific, is smaller than the new species
Primai} cords stronger on second whorl, PI staving and lias a more elevated spire, with three main spiral
near adapical suture, forming a keel, 1*2 forming a cords.
distinct keeled shoulder dividing whorl in two parts, Homalopomafinkli Petuch, 1987 from Venezuela is
each with a straight outline; P2 moving awaj from similar in size but not in shape, because it has a more
P3, reaching hait" or even llrst adapical lllird on last elevated spire narrower in its upper part; its spiral
whorl: P4 emerging from under the suture, similar in cords are also less numerous and différent in shape.
size to P3, at same distance from P3 as P3 from P2; Also Homalopoma indutum (Watson,l879) from
three subgranular secondai) spiral cords appearing West Indies has a more elevated spire and less
between PI and P2. similar in size to primai) cords numerous spiral cords.
but weaker, S3 weaklv narrower than SI and S2; C.yoyottei is a bit similar to C. macleani Waren &
space between cords weaklv narrower as themselves. Bouchet, 1993 (Figs 5-6) from Louisiana, but C.
Last whorl ver) large, corresponding to two thirds of macleani is smaller, has a less elevated spire, less
total shell height. convex in its abapical part and numerous spiral cords, a more tangential aperture and
concave adapically, two areas separated by strong has a peripheral keel on last whorl.
shoulder; periphery with single slight shoulder; C.philipiana (Dali. 1889) from the Caribbean Sea,
prosocline threads more visible with the effect that Homalopoma cunninghami E.A.Smith, 1881 from
primai) and secondai-) cords become granular on Magellanic area and H. boffii Marini, 1975 from
upper part ofwhorl. only subgranular or even staying Brazil are ail much smaller and lack the keel. In the
smooth on lovver part; P5 appearing from suture, same way, C. jamsteci (Okutani & Fujikura, 1990)
similar in size and shape to P4; some subgranular from Japan is slightl) smaller, lack shoulder keel and
tertiai) primai) cords appearing between primary has only 4 strong spiral cords on the last whorl. H.
and secondai-) ones by intercalation. linnei (Dali, 1889) from West Indies and Brazil is
Aperture subcircular to ovate, transversely elongated, also much smaller. with only a weak shoulder.
smooth within; outer lip thickened. Columella H. albida Dali, 1881, also from West Indies, is much
curved. smooth; columellar callus rather thick, smaller. with less spiral cords on the whorls and the
concealing basai cords over which it lies. Base base and bears a columellar tooth. C. bicarinata (von
convex. with 12 to 15 smooth spiral cords, similar in Martens, 1904) from South Africa is smaller, with
size and shape. broader than distance between them; less numerous spiral cords.
cords near umbilical area partially covered by
columellar callosity. Etymology
Colour of protoconch and first whorl ofteleoconch
brownish. Other teleoconch whorls whitish, with The new species is named after Mr Jean-Claude
orange, beige or brown markings. Yoyotte (Guadeloupe), the fisherman who collected
Operculum unknown. the shells from deep waters.
:
Discussion ACKNOWLEDGEMENTS
The keel on the shoulder and the lack of any I would like to thank D. Lamy who entrusted me the
umbilicus are very distinctive features of the new spécimens to study. I am also especially grateful to P.
species. Therefore the genus Cantrainea Jeffreys, Bouchet and V. Héros (Muséum national d'Histoire
1883 was choosen for it. although examination ofthe naturelle de Paris) for access to the malacological
operculum or the soft parts may prove that the genus ressources and scientific papers ofthe MNHN, and,
Homalopoma Carpenter. 1864 could be a better finally and as usual, to R. Houart for his judicious
choice. advices.
The type species ofthe genus, Cantraineapeloritana
(Cantraine. 1835) is smaller than C.yoyottei and has
1-3. Cantraineayoyottein.sp., holotype MNHN, Guadeloupe, offPigeon Is., 17. 6 x 20.4 mm.
4. Cantraineayoyottein.sp., paratype IRSNB, Guadeloupe, offPigeon Is., 18.3 x 22.0 mm.
5-6. Cantraineamacleani Waren & Bouchet, 1993, holotype MNHN, Louisiana Slope, SEALINK 2053, "Bush
Hill", 11.4x 14.6 mm.
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VlLVENS Cantraineayoyottein.sp. NOVAPEX 2 (4): 153-156, 20 déc. 200
155
Vil \l \s ( 'antraineayqyottei n.sp. NOVAPEX 2 (4): 153-156, 20 déc. 2001
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