A paper on Odontocymbiola americana and related species has been in Vita
Marina:
 
Calvo, I.S. & J. Coltro junior, 1997: Studies on Odontocymbiola americana
(Reeve, 1856) (Mollusca, Gastropoda: Volutidae), with the rediscovery of
Odontocymbiola cleryana (Petit de la Saussaye, 1856) and descriptions of
two new species. Vita Marina 44(3-4): 21-38.
 
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> Van: Jose Eduardo de Alencar Moreira <[log in to unmask]>
> Aan: [log in to unmask]
> Onderwerp: Volutidae
> Datum: maandag 26 januari 1998 12:55
>
> GOOOOOD morning to all other Conch-lers
> First of all many thanks to Riccardo, Gary and John Wolff for the info
> about Haustrum. The final result was Haustrum 2 x 1 Purpura and I'll keep
> Haustrum in my shell database as a valid genus. This 2x1 was a tight
final.
> As tight as the loss of my beloved Packers yesterday (yes, there is a
> cheese head in Brazil; Kim did you go to the game?). AAARGHH!!!! Never
> mind, next year we'll be back!
>
> I have another question to the experts. There are, among others, two well
> known Volutidae species in Brazil: Adelomelon brasiliana and
Odontocymbiola
> americana.
>
> These names are found in Abbott's Compendium and in Rios' Seashells of
> Brazil. Rios also list Adelomelon brasiliana under Pachycymbiola, but as
a
> subgenus.
>
> Poppe & Goto raise Pachycymbiola to a valid genus. So, for them
Adelomelon
> brasiliana becomes Pachycymbiola brasiliana. The same name is found in
the
> La Conchiglia Annuario 1997 "Doute's Collection".
>
> Pope & Goto also list in their book Odontocymbiola americana as
Adelomelon
> americana. As far as I know Adelomelon and Odontocymbiola are quite
> different genus and it sounds very strange for me this kind of
> classification. The same Adelomelon americana classification appears in
the
> Annuario 1997, giving me some (other) nots in my brain.
>
> What is the correct classification for these two species?
>
> Cheers,
> Eduardo Moreira
> Brasilia, Brazil
> [log in to unmask]