Cart-Rut Shell Dicathais orbita
In south-eastern Australia the sculpture consists of massive, deep, spiral ridges.
Across southern Australia the shell changes form from the deeply grooved eastern form to a smoother form across southern shores, to a tubercled and bumpy form in south-western Australia. See Biology below.
The Cart-Rut Shell and all of its forms range from southern Queensland, around the southern Australian shores to Barrow Island in Western Australia. Also New Zealand.
It occurs singly, or in small groups, in crevices and rock pools at mid to low-tide levels and below, often in regions of very strong wave action.
This large carnivorous snail changes its form gradually over its distribution range across southern Australia. So much so, that previous researchers gave the forms three different scientific names. Click here to investigate this story.
Bennett, I. (1987) W.J. Dakin's classic study: Australian Seashores. p.139, Angus & Robertson, Sydney.
Davey, K. (1998) A Photographic Guide to Seashore Life of Australia. p.24, New Holland, Sydney.
Edgar, G.J. (1997) Australian Marine Life: the plants and animals of temperate waters. p.46, Reed Books, Kew.
Womersley, H.B.S. (1987) The Marine Benthic Flora of Southern Australia. pt. 2 , p.194, South Australian Government Printer, Adelaide.