Four new species and two new records of Odostomiinae (Gastropoda: Pyramidellidae) from Brazil

• Main Author: Alexandre Dias Pimenta
• Format: Article
• Language: English
• Published: Pensoft Publishers 2012-10-01
• Series: Zoologia (Curitiba)
• Subjects: Chrysallida; Eulimastoma; Fargoa; Parthenina; West Atlantic
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000500007

Four new species of the pyramidellid Odostomiinae from Brazil are described: Chrysallida conifera sp. nov., characterized by a small and regularly conical shell with prominent nodules; Parthenina biumbilicata sp. nov., characterized by a deep and wide umbilicus and a regularly increasing aperture diameter at the protoconch, which bears a small circular umbilicus; Eulimastoma franklini sp. nov., which is very similar to Eulimastoma dydima (Verrill & Bush, 1900) but has a prominent helicoid protoconch; Eulimastoma exiguum sp. nov., similar to Eulimastoma weberi (Morrison, 1965) but without spiral ridges. Fargoa diantophila (Wells & Wells, 1961) and Chrysallida nioba (Dall & Bartsch, 1911) are reported from the southwestern Atlantic for the first time.