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+--- Thread: RE: help me with these 2 snailshells (/showthread.php?tid=1045)
RE: help me with these 2 snailshells - giani - 08-02-2010
Hello,these are TURBINELLA ANGULATA or Pleuroploca Trapezium Paeteli???
<a href="http://www.badongo.com/pic/10079599" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079599">http://www.badongo.com/pic/10079599</a><!-- m --></a>
<a href="http://www.badongo.com/pic/10079600" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079600">http://www.badongo.com/pic/10079600</a><!-- m --></a>
<a href="http://www.badongo.com/pic/10079602" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079602">http://www.badongo.com/pic/10079602</a><!-- m --></a>
<a href="http://www.badongo.com/pic/10079603" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079603">http://www.badongo.com/pic/10079603</a><!-- m --></a>
<a href="http://www.badongo.com/pic/10079604" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079604">http://www.badongo.com/pic/10079604</a><!-- m --></a>
RE: help me with these 2 snailshells - paul monfils - 08-04-2010
Definitely Turbinella angulata. Â Here are some pics of both species for comparison:
<a href="http://www.gastropods.com/2/Shell_1512.shtml" target="_blank"><!-- m --><a class="postlink" href="http://www.gastropods.com/2/Shell_1512.shtml">http://www.gastropods.com/2/Shell_1512.shtml</a><!-- m --></a>
<a href="http://www.gastropods.com/0/Shell_12100.shtml" target="_blank"><!-- m --><a class="postlink" href="http://www.gastropods.com/0/Shell_12100.shtml">http://www.gastropods.com/0/Shell_12100.shtml</a><!-- m --></a>
These are superficially similar, but here are some specific characteristics to note on your specimens:
- Smooth but thick and mature lip (P. trapezium has small teeth, usually in pairs, on the lip. Â An immature P. trapezium may not have them (like the top picture on the linked page), but your shell is obviously fully mature.)
- Three heavy mid-columellar folds (P. trapezium has only a couple of small ridges at the anterior end of the columella, the central part being smooth.)
- The extension of the columella out onto the body whorl. Â This is a characteristic of Turbinellidae, not Fasciolariidae.
- The heavy cords on the posterior body whorl, just below the suture (the "sub-sutural ramp"). Â (Not seen in P. trapezium.)
. Â <span class="petit">--Last edited by Paul Monfils on 2010-08-05 03:20:41 --</span>