Shell very elongated, slender, of 2-2.5 protoconch whorls (usually broken off on adults) and 10-11 teleoconch whorls. Sculpture of four smooth spiral cords on spire whorls, and a fifth one on the body whorl in extending from the suture. Aperture rounded, with simple outer lip, anteriorly with a deep and widely open, very short siphonal canal.
common size :
This species is distinguished from the native Metaxia metaxae Delle Chiaje, 1828, which has a similar outline, by having smooth instead of granulose spiral cords. Another native species, the cerithiopsid Seila trilineata (Philippi, 1836) also has smooth cords, but differs by its very dark, almost black color, and by having only three cords, which are smoother.
BIOLOGY / ECOLOGY