We all have opinions about aspects of taxonomy, though publication of
new taxonomy should be left to those with very good reference sources
and time to use them.

There are those who think Angaria are enough different to merit a
category of their own.  It has been proposed at times that it be a
subfamily of Trochidae.  Evidently that doesn't meet requirements of
being consistent in the family as to radulae.

My opinion is that being consistent as to opercula is also important.
Angaria opercula are consistent with Trochicae, not Turbinidae, though
the shell form is more consistent with Turbinidae.  There are other
physical differences in the animal from both Turbinidae and Trochidae.
For example there is a claw-like process near the operculum not found in
 the other two families.  I would set Angaria apart from both in
collections and wait for a new family Angaridae that can have consistent
keys for all members of the family.  For the collectors relying on only
the shell to identify their specimens, genera and family desirably
should do this.  The names at and above genus level are a convenience
and man-made device and should desirably satisfy both collectors (shell
character study) amd scientists.
--
                     Aloha from Wesley M. Thorsson
Editor of Internet Hawaiian Shell News, a monthly Internet Publication
           122 Waialeale St, Honolulu, HI  96825-2020,  U.S.A
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