T. IBBARROLA, F. RUBIO, E. ROLÂN 
New information on Calliotropis ottoi 
Calliotropis ottoi (Philippi, 1844) 
Figs 1-13 
Trochus ottoi Philippi, 1844: 227, pl. 28, fig. 9. 
Description. Shell (Figs 1-4): Vilvens & Swinnen 
(2008) commented in the remarks the most important 
differential characters with other species. 
Soft parts (Figs 6-10): Foot elongate, sole very rough. 
The cephalic lappets are relativelly small and simple. 
The cephalic tentacles are large and elongate with an 
irregular ciliate surface. The cephalic membranes are 
of medium size and with a continuons border. Buccal 
margin with latéral extensions, mouth small. The neck 
lobes are of medium size and very digitate. The tip of 
the snout are amply expanded latérally. The epipodial 
tentacles are numerous: Two in medium position and 
three other ones of different size located near of the 
operculum insertion. Between the tentacles and at the 
base of some of them sensorial organes 
tuberculiformis, remind small tentacles. Propodium 
with latéral extensions. Eyes black, pedunculate. 
Operculum (Fig. 5): yellowish, transparent, with short 
growing edge. 
Radula (Figs 11-13): The rachidian tooth has a plate 
from which a sharp-pointed curved part appears on the 
upper area. The rachidian tooth (Fig. 12R) is slightly 
smaller; then the latéral teeth (Fig. 12L) are three, also 
curved on their upper part, where some small cusps 
can be seen near the sharp-pointed part; they are not 
so large as those shown by Hickman & McLean 
(1990: fig 47). The marginal teeth (Fig. 12M) are 
numerous and similar, narrow, elongate and curved at 
their upper part. The existence of lateromarginal plate 
is confirmed but difficult to be seen. 
Remarks. Figures of this species has been published 
by Philippi (1844) and by Vilvens & Swinnen (2008) 
where the figures of Martens & Thiele (1904) are also 
shown. 
Discussion. A problem not yet resolved is the 
synonymy of this species: 
Warén (1991) mentioned with doubts that Margarita 
regalis Verrill & Smith, 1880 could be the same 
species. He also presented Solariella infundibulum 
Odhner, 1912 as a synonym. 
About the identification of the species we hâve 
studied, il we follow the key given by Vilvens & 
Swinnen (2008) we could hâve doubts between 
Calliotropis ottoi and C. mogadorensis (see Locard, 
1898). Some characters, as the existence of a spiral 
coid into the umbilicus which has been mentioned for 
this last species is not sure and seems to be a variable 
character, as well as the first row of nodules in the 
subsutural area, variable in oui* own material. The 
most definitive decision was based in the origin of the 
material, very far from Morocco and close to the 
references from North Europa. It is possible that 
Calliotropis mogadorensis (Locard, 1898) could be 
another synonym of C. ottoi. 
Hickman & McLean (1990: 84, figs D-E) figured the 
soft parts of Calliotropis species, showing the 
existence of a short number of epipodial tentacles at 
each side: Four in Calliotropis carlotta (Dali, 1902) 
and three in C. regalis (Verrill & Smith, 1880). Both 
are very different from the species here studied in the 
number and position of the epipodial tentacles. In 
spite of that, the position of the soft parts was 
examined in retracted animais, we can see in our 
material up to eight epipodial tentacles at each side. 
This seems to mean that this character is very variable 
into the genus. Another question is that C. regalis was 
also considered a synonym of the species here studied. 
ACKNOWLEDGEMENTS 
The authors thanks Jésus Méndez of the CACT1 
(University of Vigo) for the SEM photographs of the 
radula. The optical photographs were made in the 
Department of Xenetic of the University of Vigo. 
REFERENCES 
Bouchet P. & Rocroi J.-P. (eds), 2005. Classification 
and nomenclator of gastropod families. 
Malacologia 41 (1-2): 1-397. 
Colman, J.G. & Tyler, P.A. 1988. Observations on the 
reproductive biology of the deep-sea trochid 
Calliotropis ottoi (Philippi). Journal of Molluscan 
Studies 54: 239-242. 
Hickman, C.S. & McLean, J.H. 1990. Systematic 
révision and suprageneric classification of 
Trocacean Gastropods. Natural History Muséum 
of los Angeles County. Science sériés 35, 169 pp. 
Locard, A. 1898. Expéditions Scientifiques du 
Travailleur et dit Talisman pendant les années 
1880, 1881, 1882, 1883. Mollusques Testaces. \o\. 
II. Masson et Cia, Paris. 515 pp, 18 pis. 
Martens, E. von & Thiele, J. 1904 "1903”. Dis 
beschalten Gastropoden der Deutschen Tiefsee- 
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der deutschen Tiefsee-Expédition auf dem 
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iv + 303 p., pis 13-28. 
SStS/iw Ef li ° tropis ot,oi ( PhiliPPi, 1844). 1-4. shell, 14.4 height x 16.5 mm diameter, Hatton Bank, 
59 17N/17 33 W; 5. operculum; 6-7. soft parts. 
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