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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