Description
Author: Jan Delsing
Text ID: 98996
Text Type: 1
Page: 0
Created: 2020-02-12 19:56:35 - User Delsing Jan
Language: EN
Text function: [[t:668863,textblock=98996,elang=EN;Description]]
Species in Falsilatirus are characterized by their small protoconch in combination with a rather large adult size and by the shape and denticulation of the aperture. The protoconch consists of about 1,5 well convex whorls. The transition to the teleoconch is distinct, marked by the sudden presence of 3 spiral teleoconch cords. The parietal side of the aperture is flattened, the rectangular shape of the transition to the adapical part of the outer lip is accentuated by a weak anal notch; both the parietal and anal knobs are absent or weak. The outer lip is thick, with a sharp edge, flared outwards, rather narrow along the adapical part. The columella is weakly convex, covered with two columellar knobs, the adapical one situated more abapically than the adapical knob on the outer lip. Outer lip weakly concave, forming a moderately bended suboval aperture, inside with usually 2 big adapical knobs and a number of smaller abapical knobs.
Species in Clivipollia differs by the larger protoconch, the more triangular shaped aperture with moderately straight sides, the presence of a broad but weak anal knob, the columellar knobs that are situated more adapically than the knobs inside the outer lip, the absence of a gap in between the adapical and abapical apertural knobs inside the outer lip, the finer spiral sculpture with fine and sharp primary spiral cords and the larger adult size.
Fraussen K. & Stahlschmidt P. (2016). Revision of the Clivipollia group (Gastropoda: Buccinidae: Pisaniinae) with description of two new genera and three new species.