ID for limpet

[Limpets 1]

This Diodora species was acquired about 4 years ago with locality data as Alamitos Bay, Mexico and named Diodora inaequalis. It is not this species as I have those from West Mexico. Alamitos Bay is actually in California not Mexico so the puzzle was to try to identify both origin and name. It looks a bit like Diodora yokoyomai from Japan although darker than images I have seen of that species. Any help would be appreciated.

[dave r]

What size is it? Any chance of an interior photo? That may help. At first glance it looks like the European Diodora graeca.

[Limpets 1]

Here is the interior, quite nondescript. The shell is 25mm. long but has finer radials than D. graeca and the keyhole is round whereas in graeca it is more a long oval.

[dave r]

Sorry, that one has me stumped. I can see why it was named as inequalis though, the outside is a dead ringer but the inside is very different. Maybe a gerontic specimen?

[Limpets 1]

Thanks, Dave. Doesn't seeem to have the right shape for inaequalis but maybe I have to leave it at that for now.