Description
Author: Jan Delsing
Text ID: 112664
Text Type: 1
Page: 0
Created: 2021-11-21 20:49:09 - User Delsing Jan
Language: EN
Text function: [[t:1808237,textblock=112664,elang=EN;Description]]
Material Examined. Not represented in the Santa Maria Basin voucher collection. Other material examined: 11 LACM lots.
Description. Whorl profile rounded, but slightly indented below suture. Axial ribs strong except below suture, ribs broadly spaced; 4 spiral cords per whorl, subsutural cord weakest. Initial whorl of protoconch round. Shell flesh colored under thin periostracum.
Type Locality and Type Specimens. Off Point Loma, San Diego County, California, 71 -75 fathoms. Lectotype (here designated): USNM 195130.
Distribution. Santa Cruz Island (34°N), to San Diego, California (33°N).
Habitat Soft bottoms, 30-100 m, much less abundant that Lirobittium rugatum.
Remarks. This differs from Lirobittium rugatum in its pink coloration, more broadly spaced axial ribs and lack of incremental spiral cords. This was described initially as a living form of the extinct Neogene species Lirobittium asperum (Gabb, 1861), but does not have the even, more broadly spaced axial ribs and lacks the strongly carinate protoconch of that species. It is here first recognized as a full species.
McLean J.H. & Gosliner T.M. (1996) Taxonomic atlas of the benthic fauna of the Santa Maria Basin and Western Santa Barbara Channel. Vol. 9, Pt. 2: The Mollusca: The Gastropoda.