Page 4 - Russo2014
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108 PAOLO RUSSO
Following is a summary of the main populations Spiral cords irregular and of discontinuous
of the Mediterranean Sea. thickness
COAST OF PORTUGAL (Figs. 10–12) Keel very raised
It was not possible to detect the protoconch for
Medium sized
Shell rather thick and solid lack of intact specimens
Siphonal canal of medium length and slightly
NORTH COAST OF AFRICA (Figs. 20–22)
deviated
Teleoconch consisting of 7–7.5 whorls Medium sized
Light brown or yellowish in color Shell rather thick and solid
Axial ribs not very prominent Siphonal canal of medium length and slightly
Usually acarinate, sometimes the supramediane
deviated to the left
cord of the body whorl is slightly raised Teleoconch consisting of 7 whorls
Protoconch diameter 735 µm, nucleus 321µm Pale yellow to light brown
Axial ribs normally rised
CENTRAL TYRRHENIAN (Figs. 13–14) Spiral cords particularly evident and spaced
Generally has a rather evident keel
Medium sized Presence of a rather evident columellar callus
Shell rather light Protoconch diameter 914 µm, nucleus 364 µm
Siphonal canal long and straight
Teleoconch consisting of 7–7.5 whorls CENTRAL ADRIATIC (Figs. 23–25)
Milk white, sometimes with pale yellow shades
Axial ribs not very prominent, sometimes barely Medium to large sized for the species
Shell thick and solid
hinted Siphonal canal of medium length and often
Spiral cords rather thin and raised
Always acarinate twisted
Protoconch diameter 892 µm, nucleus 478 µm Teleoconch consisting of 7–7.5 whorls
Whitish in colour
SOUTHERN TYRRHENIAN (Figs. 15–17) Axial ribs not very raised
Spirals cords thin and of medium height
Small and medium sized Whorls particularly inflated
Shell rather light Seldom a slight keel is present
Siphonal canal long and straight Aperture particularly wide
Teleoconch consisting of 7–7.5 whorls Protoconch diameter 925 µm, nucleus 385 µm
Reddish brown
Axial ribs not very prominent NORTHERN ADRIATIC (Figs. 26–28)
Spiral cords rather thin and raised
Always acarinate Medium sized
Protoconch diameter 714 µm, nucleus 521 µm Shell rather thick
Siphonal canal of medium length and slightly
EGADI AND STRAIT OF SICILY (Figs. 18–19)
deviated
Medium sized Teleoconch consisting of 7–7.5 whorls
Shell rather thick Deep reddish brown to pale yellow and straw-
Siphonal canal long and straight
Teleoconch consisting of 6–7 whorls coloured
Whitish with pale yellow shades Axial ribs not very raised, sometimes lacking on
Axial ribs little prominent, barely visible in the
the last whorl
adapical area of the body whorl Spirals cords thin and of medium height
Often acarinate, sometimes the supramediane
cord of the last whorl slightly raised
Protoconch diameter 907 µm, nucleus 392 µm
