Megalobulimus cf. maximus (G. B. Sowerby II, 1825) sensu Pilsbry, 1895

Megalobulimus cf. maximus (G. B. Sowerby II, 1825) sensu Pilsbry, 1895

    São Miguel do Guamá, Pará, Brazil. Animal about 300 mm. (one foot) in length. Photograph by Dr. José Leal in August, 1980. This Megalobulimus had a shell approximately 150 mm in height, but it was not collected. The shells of only a few members of the genus attain that size, and, of them, the only one that has been reported to occur anywhere near the locality where this snail was photographed is M. maximus (G. B. Sowerby II, 1825), typical specimens of which come from Bolivia and probably adjacent parts of Brazil and Peru (Simone, 2006: 213). However Pilsbry (1895: 15) cited a specimen collected by Stübel in Baião, on the Rio Tocantins in the state of Pará, Brazil. It is probable that Pilsbry examined the specimen. If the locality data provided by Stübel is accurate, there is a reasonable likelihood that this shell(s) belongs to the same species as the snail in the photograph. Type figure of Bulinus maximus (G. B. Sowerby I, 1825) in Sowerby and Sowerby, 1838: part 138, pl. 71, fig. 63.

Original description of this species (as Cochlogena maxima) from the "Tankerville Catalogue"

    On the other hand, the likelihood of the same Megalobulimus species occurring both in Bolivia and Pará, Brazil, just south of the Amazon estuary, is not very high.

    For these reasons the snail identified as "Megalobulimus cf. maximus (G. B. Sowerby I, 1825) sensu Pilsbry, 1895."

Pilsbry, H. A., 1895-1896. Manual of Conchology (second series). 10. American Bulimi and Bulimuli. Strophocheilus, Plekocheilus, Auris, Bulimulus. Academy of Natural Sciences, Philadelphia. [iv] + 1-213 + 51 pls. Aug 20 to Sept.

Simone, Luiz Ricardo L.. 2006. Land and Freshwater Molluscs of Brazil. Museu de Zoologia Universidade de São Paulo, São Paulo, Brazil. 390 pp. including over 1100 text figures.