Strombus

13-14

Authors: Simone, L.R.L. & Gonçalves, E.P.

The southernmost range of the geographic distribution of Erosaria acicularis (Caenogastropoda, Cypraeidae) is extended from north coast of Rio de Janeiro state to the north coat of São Paulo state. This observation is based on living specimen found in Ilha Bela municipality.

18-26

Authors: Simone, L.R.L.

This paper is developed based on descriptive studies published elsewhere. It aims to analyze the morphological data on a set of littorinoidans and rissooideans looking for the understanding their phylogeny and their relationships with remaining Caenogastropoda taxa. The examined set of species is relatively small, but considered sufficient for above mentioned analysis. The phylogenetic study revealed the monophyly of the Rissooidea, being the littorinoideans a paraphyletic arrangement of basal branches. A total of 44 morphological characters (59 states) is analyzed. Its analysis resulted in the following cladogram: (Littorina flava (Annularia sp. (Amphithalamus glabrus (Potamolithus ribeirensis (P. karsticus – P. troglobius))))). A set of 14 morphological synapomorphies supports this monophyly.

1-5

Authors: Costa, P.M.S & Simone, L.R.L.

Lucapina elisae (Vetigastropoda, Fissurellidae) is a new species described for deep waters (from 260 m depth) in Canopus Bank, off Ceará, N.E. Brazilian coast. The shell is large, thin walled, with small orifice, and delicate reticulate sculpture. A preliminary gross anatomy of the species is also provided.

9-12

Authors: Caetano, C.H.S.; Santos, F.N. & Costa, P.M.S.

The genus Neopleurotomoides is represented by two species in the North Atlantic, N. callembryon (Dautzenberg & Fischer, 1896) and N. distincta Bouchet & Warén, 1980. Here, we register for the first time the former species to “Brazilian deep waters” extending southward the geographical distribution of this species based in material obtained from Rio de Janeiro state (21ºS).