C. VlLVENS 
Seguenzioidea and Trochoidea from French Polynesia 
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Map 1 : French Polynesia : global location of MNHN campaigns - 
: BENTHAUS campaign; 
: TARASOC campaign / leg 1 (1) : Tarava Seamounts; 
: TARASOC campaign / leg 1 (2) : Tuamotu Archipelago; 
: TARASOC campaign / leg 2 : Société Islands. 
Material and methods 
The material studied in the présent paper was 
brought by the ÏRD-MNHN expéditions BENTHAUS 
(29/10/2002-28/11/2002) and TARASOC 
(20/09/2009-27/10/2009). Some information about 
intertidal and low subtidal species was brought by 
J.Letourneux and his team of French Polynesian 
malacologists. 
Samples studied belong to superfamilies 
Trochoidea and Seguenziodea; the Solariellidae 
samples hâve been kept aside for another study using 
among other things DNA sequences (Vilvens and 
Williams, in préparation). 
Regarding the distribution of the new species and 
the extension of the distribution of known species, the 
range is taken from the internai intervals of the two 
extremes values. This range of the known and new 
species is provided for ail the available specimens and 
also for the only living specimens if they hâve been 
2 
found; when these ranges are the same, the common 
range is cited once with the "(living)” annotation; if ail 
the specimens are dead collected, the range is cited 
with the "(dead)" annotation. 
Regarding the description methodology, the main 
conchological features used are (see Text Figure 1 
below): 
♦ general shape of the shell (depressed, high spired 
- conical, cyrtoconoidal, coeloconoidal); 
♦ shape of the whorls (convex, concave, straight - 
with or without shoulder or keel); 
♦ spiral cords of the whorls (ontogeny, number, 
beads, strength); 
♦ spiral cords on the base (number, beads, distance 
between); 
♦ shape of the aperture, the outer and the inner lip. 
