dear Carlo i think this species could be Assiminea succinea, is tipical of soft bottoms where there is mangrove, is distributed from massachusetts to southern Brazil

regards

Dear Jorge, thank you for answer. I think Assiminea succinea is quite different that.

Assiminea succinea (L. Pfeiffer, 1840): http://www.jaxshells.org/4bbj.htm

Thanks

Dear Carlo, it could be related to Parodizia uruguayensis Pereira de Medina, 1959?

see: Da-Silva, Maria-Cristina-Pons; Veitenheimer-Mendes, Inga-Ludmila, 2004: Transferencia do genera monotipico Parodizia Medina de Bithyniidae (Gastropoda, Prosobranchia) para Pyramidellidae (Gastropoda, Heterobranchia). Revista Brasileira de Zoologia 21(2): 277-280

Carlo:

I tend to agree with the suggestion of Luigi that it could be closely related to monotypic genus Parodizia.

Best

Syed

Dears Luigi and Syed,

I agree with the identification, thank you very much!

Yes, with the presence of an columellar fold, the suggestion of Luigi is correct : Parodizia Medina, 1959

Dear Carlo, if interested, write Dr. Carlos Henrique Soares Caetano

Best,

Áthila.

Parodizia Medina, 1959 seems conchologically close to Petitilla Wise, 1995.

Let me toss Sayella Dall, 1885 (Type OD Leucotina hemphilli Dall, 1884) into the mix for discussion, as a potential earlier synonym of Parodizia and Petitella. See Wise, 1996, fig. 15 .

Eu não podia ver uma ilustração de Parodizia Uruguayensis de Medina, 1959 que é publicado em uma revista rara chamada "Neotropica 5(17):51-55". O tipo que você postar é diferente do tipo que se encontra presente da Silva & Veitenheimer- Mendes, 2004 parece um Pyramidellidae em vez o seu tipo parece um " freshwhater grastropod ". "Syrnolopsidae" ??? Fazer mais pesquisas , porque poderia tratar de uma nova espécie para a ciência.

Dear Carlo, I'll leave others to identify the organism but please remember that there is no such word as specie - 'species' is both singular and plural. best wishes, Mike

Thank you Michael, it was a typo.

I could not see any illustration of Parodizia uruguayensis Medina , 1959 his published in a rare magazine called " Neotropica 5 (17 ) : 51-55 " . The type that you post is different from the type that is illustrated in da Silva Mendes & Veitenheimer- 2004 (seems a real Pyramidellidae), your type instead looks like a " freshwater grastropod " . " Syrnolopsidae " ???

Do more research because it could be a species new to science.

Hi Carlo this is a good pdf.  Best Gianluigi

They are two different species. The species found by Carlo M. Cunha in the mangroves area, is not the same figurated by da Silva & Mendes-Veitenheimer, 2004 in the article. the first is a "freshwater species" the second is a real Pyramidellidae. Roberto Ardovini.

If anyone has a copy of Medina, 1959, a PDF would be most appreciated. I agree with Ardovini that Cunha's shell is not conspecific with that figured by Silva & Veiteheimer-Mendes, 2004, disagree that it is a freshwater species. I would provisionally place Cunha's shell in Sayella Dall, 1885 (TS, OD, Leucotina hemphilli Dall, 1884) because of it's similarity to figures of the type species published of Wise, 1996, fig. 15.  A specimen with the protoconch intact would be helpful.

http://biodiversitylibrary.org/page/13113899

Dear Patrick, I´ll try a young to check the protoconch. Thank you!

I believe I have a juvenile of Sayella hemphilli (Dall, 1884) from the Pinecrest beds of NE Sarasota Co., FL (Upper Pliocene, ~ 3 MYA):

Thanks Harry!