New Seguenziidae of the genus Ancistrobasis (Vetigastropoda: Seguenzioidea) from deep waters in the South Atlantic Ocean (Brazil)

A new species of the family Seguenziidae Verrill, 1884 was discovered during dredging on the continental slope off northeastern Brazil. This species is described herein based on conchological features. Ancistrobasis zumbii sp. nov. is similar to A. costulata (Watson, 1879) and A. depressa (Dall, 188...

Full description

Bibliographic Details
Main Authors: LIMA, Silvio Felipe Barbosa, CHRISTOFFERSEN, Martin Lindsey, BARROS, José Carlos Nascimento
Format: Text
Language:unknown
Published: Station Biologique de Roscoff (SBR) 2013
Subjects:
South Atlantic Ocean
Online Access:https://dx.doi.org/10.21411/cbm.a.1103273
http://application.sb-roscoff.fr/cbm/doi/10.21411/CBM.A.1103273
Description
Summary:A new species of the family Seguenziidae Verrill, 1884 was discovered during dredging on the continental slope off northeastern Brazil. This species is described herein based on conchological features. Ancistrobasis zumbii sp. nov. is similar to A. costulata (Watson, 1879) and A. depressa (Dall, 1889) in having flattened whorls increasing regularly (except for the last whorl, which enlarges conspicuously), an inner lip with a rounded denticle and a funnel-shaped umbilicus. Ancistrobasis zumbii differs primarily in possessing a slight suprasutural angulation, slight axial ribs on the first teleoconch whorls and smooth, slightly undulated spiral threads.

Similar Items