The shells of this species are thin and fragile, with the valve exterior usually separated into three distinct areas, the anterior and posterior sections with radial sculpture and the central area smooth. Exterior of shell is coloured brown to dark green. Shell up to 3 cm across.
Some earlier authors considered this species the same as a species from New Zealand.
Rock crevices and sometimes imbedded in a mass of threads, from low tide to depth of 50 m.
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed