Popis
Autor: Jan Delsing
Text ID: 107077
Text Type: 1
Page: 0
Založeno: 09.03.2021 13:29:54 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:1594516,textblock=107077,elang=EN;Popis]]
Shell small, conical, subperforated, pale brown. Sculpture consisting of rather distant, irregular, and low spiral lirae, 2 to 3 on the spire-whorls, 5 on the last whorl above the periphery, and about 5 upon the base, crossed by numerous oblique growth-lines and distant membranaceous plaits, which are easily rubbed off. Colour pale brown, sometimes with a narrow pale band at the periphery of the last whorl and 1 around the middle of the base. Epidermis thin, horny, not shining. Spire acutely conical, the apex obtusely rounded, higher than the aperture, Protoconch small, papillate, of 2 convex, dark-brown and shining whorls, the first with a few faint spiral striae, the second closely radiately striate. Whorls 5,5, rounded, the last distinctly angled at the periphery ; base flatly convex, depressed round the umbilicus, but not keeled. Suture impressed. Aperture slightly oblique, subcircular, angled above. Peristome thin, regularly arched, callous within, continuous over the parietal wall; notch at the suture but slight. Columella arcuate, sub vertical, with a white inner callus, slightly expanded over the umbilicus, which is narrow and deep. Operculum thin, horny, with about 5 whorls ; nucleus subcentral. Diameter, 3,25 mm. ; height, 5 mm.
New Zealand: North Island only : Te Reinga ; Tom Bowline's Bay ; Whangaroa (C. Cooper) ; Kaihu, Hokianga ; Waitakerei Range (H. S.) ; Waiwera ; Birkenhead ; Mount Pirongia. The type is from " Auck¬land," exact locality not stated (T. F. Cheesenian).
Suter, H. 1913. Manual of the New Zealand Mollusca.