C. VlLVENS, F. SWINNEN & F. DENIZ GUERRA 
A new species of Clelandella 
Text figure 1 : Features of Cantharidinae shells; FI : 
height; W : width; HA : height ofthe aperture; PI. P2, 
P3,... : primary cords; SI, S2, S3, ... : secondary 
cords (shell : Clelandella miliaris (Brocchi, 1814), 
Brittany, Roscoff, 9.4 x 8.0 mm). 
Statistical calculations hâve been performed with 
Microsoft Excel 2003 and Tanagra 1.4, a free 
statistical software from Lyon II University. 
Abbreviations 
Repository 
IRSNB : Institut royal des Sciences naturelles de 
Belgique, Brussels, Belgium. 
MNHN : Muséum national d'Histoire naturelle, Paris, 
France. 
Other abbreviations 
H : height 
W : width 
TW : number of teleoconch whorls 
PI, P2, P3,...: primary cords (PI is the most adapical) 
SI. S2, S3,...: secondary cords (SI is the most 
adapical) 
lv : live-taken specimen(s) présent in sample 
dd : only dead specimen(s) présent in sample 
sub : subadult specimen(s) 
juv : juvénile specimen(s) 
SYSTEMATICS 
We follow here the new classification of Williams et 
al. (2010) who has elevated the Cantharidini tribe (as 
it was considered by Hickman & McLean, 1990 and 
still by Bouchet & Rocroi (2005)) at a subfamily level 
of the Trochidae. 
Text figure 2 : Prospecting area in this paper 
Superfamily : TROCHOIDEA Rafinesque, 1815 
Family : TROCHIDAE Rafinesque, 1815 
Subfamily : CANTHARIDINAE Gray, 1857 
Genus : Clelandella Winckworth, 1932 
Type species : Trochus clelandi W.Wood, 1828 
(=Tmchus miliaris Brocchi, 1814) (by o.d.)- 
Pliocene, northern Italy. 
Distinctive features. Shell rather small (height up 
to 14 mm for the known species), elevated spire 
almost as high as wide, conical shape with fiat whorls. 
Smooth protoconch with a thin terminal varix. Rather 
strong spiral sculpture of beaded spiral cords. Angular 
to subangular periphery. interrupted peristome, 
aperture prosocline, rhomboidal. Base from almost fiat 
to moderately convex. No umbilicus or umbilicus very 
narrow. Variable colour, with various patterns. 
Remarks. Gofas (2005) described recently 4 new 
species from north-western Atlantic and 1 new species 
from eastern Mediterranean. 
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