Taxonomic review of Metaxia (Gastropoda: Triphoridae) from Brazil, with description of a new species

Abstract

The taxonomy of the species of Metaxia Monterosato, 1884 from Brazil is revised. Previously to this study, only Metaxia excelsa Faber & Moolenbeek, 1991 was known to occur in this country, under its older name Metaxia exilis (C.B. Adams, 1850). The review of a large amount of shells in malacological collections in Brazil revealed the occurrence of three known additional species: Metaxia taeniolata (Dall, 1889); Metaxia rugulosa (C.B. Adams, 1850); Metaxia prompta Rolán & Fernández-Garcés, 2008, all previously reported from the southeast coast of the USA and/or the Caribbean region. Metaxia gongyloskymnus sp. nov., diagnosed by the globose protoconch with continuous axial ribs and microscopic spiral sculpture, is restricted to localities off the Southeastern Brazilian coast

Redescription and reassignment of Ondina semicingulata to the Pyramidellidae, with review of the occurrence of genus Evalea in the Western Atlantic (Gastropoda)

“…Pimenta et al 2004a), several taxa remain poorly known, and the revision of genera usually gives rise to the discover of new records and/or new species (e.g. Fernandes and Pimenta 2011). This is especially true to the marine micromollusks, as discussed by Pimenta and Geiger (2015).…”

New record of the genus <i>Mastoniaeforis</i>(Gastropoda: Triphoridae) from Vietnam

“…There are often 3-4 spiral nodulated cords on each whorl. The shell is sinistral, except for those of the genus Metaxia Monterosato, 1884 [Fernandes, Pimenta, 2011].…”