Triton martinianum: Holotype unknown, Lectotype designated by Beu & Kay, 1988; BMNH 1854.10.4.409. Type locality: Island of St. Lucia, Antilles.- Litiopa effusa: Type MCZ 186589. Type locality: Jamaica.
DISTRIBUTION
This species is known from Atlantic Ocean; from Florida to Brasil in W. Atlantic, and from the Canary Islands to Gabon in eastern Atlantic. It is found in all the Canary Islands and in Lanzarote it is not an uncommon species with established populations in several points around the island living on rocky bottoms at depths between 25 and 40 m.
DESCRIPTION
From 60 to 100 mm. Shell high-spired. Sculpture formed for well-developed axial ridges and nodular spiral cords. Varices low. Siphonal canal short and straight. Aperture oval with plicae in columellar wall and bifid teeth in the outer lip. Operculum corneus excentric. Protoconch of reddish color with about 4 smooth whorls. Periostracum similar to parthenopeum but less dense with long haired rows over the varices. Basic color light brownish. Orange aperture with brighter teeth. A dark blotch on columellar wall that distinguishes it from pileare.
REMARKS
A relatively common species in Lanzarote. It was rarer some years ago but in the last 10 years the sites where it is found have grown. It lives sympatrically with C. aquatile without intermediate states found between both species. They can be distinguished easily by the general color of the shell and mainly by the dark blotch in the columella in C. martinianum. On the other hand, both species have a very similar animal coloration with orange blotches, what could need further studies to confirm these apparent differences.