I'd agree with Bob's suggested order, but you are really dealing with a bush, with families coming out in all directions, rather than a straight line of all the families.  There are published lists but I do not have the latest--probably others will help you.

On Sunday, March 17, 2024 at 07:09:04 PM EDT, Robert Fales <[log in to unmask]> wrote:


Dear Vicky:

"Proper taxonomic order" depends on which expert you believe.  Without trying to defend (and probably starting a firestorm), I would put them in the following phylogenetic order:

Zebinidae
Vermetidae
Aplysiidae
Ellobiidae

Let the games begin.

Bob Fales
Edison, NJ

On Sunday, March 17, 2024 at 06:34:22 PM EDT, Vicky Wall <[log in to unmask]> wrote:


Hello,
I am trying to get an exhibit together with the proper taxonomic order of Gastropod families.  I would appreciate any help with the following families....if you know where they belong, it would be helpful to me if you could give one or two families in front of and after. Here they are:
Zebinidae, Ellobiidae, Aplysiidae, and Vermetidae.
Thank you very much,
Vicky Wall
Mayodan, NC
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