Description
Author: Jan Delsing
Text ID: 103283
Text Type: 1
Page: 0
Created: 2020-11-17 21:29:23 - User Delsing Jan
Last change: 2020-11-17 21:29:52 - User Delsing Jan
Language: EN
Text function: [[t:1369984,textblock=103283,elang=EN;Description]]
Diagnosis: Shell of moderate height, trochoid-turbiniform, whorls shouldered and flat sided; periphery well below mid-whorl, base distinctly flattened; sculpture of relatively sharp spiral cords and fine growth-lines; umbilicus strongly corded, margin rounded, Patterned with brownish axial flames and blotches.
Description: Shell of moderate height (L/D = 0,67-0,79), trochoid-turbiniform, somewhat stepped; whorls flat sided, shouldered; periphery well below mid-whorl, base distinctly flattened; teleoconch of up to 4,5 whorls. Sculpture predominantly spiral, consisting of relatively sharp cords, wedge-shaped in profile; first whorl with 4-5 weak cords which strengthen and develop intermediaries during subsequent whorls; body whorl with ca 10 cords above and including the periphery, usually alternating in strength; cord forming shoulder angle often strongest; cords and intervals subequal; no spiral lirae; cords become obsolete below periphery, and central band of base essentially smooth; cords reappear and strengthen toward umbilicus; some specimens with most of base smooth and glossy. Axial sculpture of numerous very fine to microscopic growth-lines. Umbilicus deep, of moderate width and with well-developed, rounded spiral cords, particularly near margin which is evenly rounded and not clearly separable from base; umbilical cords irregularly granulated by growth-lines, some strong. Aperture ovoid to three-cornered, elongated toward periphery; peristome incomplete; outer lip markedly prosocline, weakly crenulated by cords; interior nacreous. Protoconch: Typically solarielline, diameter ca 400 µm, figured specimen somewhat worn. Colour: Ground colour yellowish-white to pale yellow, patterned from second whorl onward with blotches and axial flames in various shades of brown; often a spiral band of irregularly shaped darker brown blotches on the shoulder; paler axial flames between shoulder and periphery; base usually with a spiral band of pale blotches near umbilical margin, but sometimes without colour pattern. A weak pink/green iridescence in fresh specimens.
Dimensions: Holotype, length 4,4 mm, diameter 5,6 mm; largest specimen, length 4,5 mm, diameter 6,3 mm.
Herbert, D.G., 1987. Revision of the Solariellinae (Mollusca: Prosobranchia: Trochidae) in southern Africa.
Interchangeable taxa
Author: Jan Delsing
Text ID: 103285
Text Type: 19
Page: 0
Created: 2020-11-17 21:31:31 - User Delsing Jan
Language: EN
Text function: [[t:1369984,textblock=103285,elang=EN;Interchangeable taxa]]
A distinctive, relatively shallow water species, recognised by its comparatively strongly corded, flat-sided whorls
Herbert, D.G., 1987. Revision of the Solariellinae (Mollusca: Prosobranchia: Trochidae) in southern Africa.
Distribution
Author: Jan Delsing
Text ID: 103284
Text Type: 3
Page: 0
Created: 2020-11-17 21:30:44 - User Delsing Jan
Language: EN
Text function: [[t:1369984,textblock=103284,elang=EN;Distribution]]
Distribution: South-Africa. South-western Transkei to eastern Cape Province, 32-70 m (living specimens 41-70 m, sand).
Herbert, D.G., 1987. Revision of the Solariellinae (Mollusca: Prosobranchia: Trochidae) in southern Africa.