Hi!
The dentition is close to spurca (it can't be
macandrewi with such a base) but, dorsum coloration is
undoubtedly close to macandrewi.
My answer would be :
Here's a hybrid : SPURCA X MACANDREWI.
It does occur (very rarely but it occurs) ,
particularly, for cowries of a same subgenus. As
spurca and macandrewi are EROSARIAs...
Fabien Goutal
PS :It can't be a marginalis, this shell can't be
found in the northern part of the Red Sea
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