Revised 18 Nov. 2025
PDF version (with illustrations and additional information)

Geotria Gray 1851 etymology not explained nor evident; see essay at PDF link above

Geotria australis Gray 1851 Latin for southern, referring to South Australia, type locality

Geotria macrostoma (Burmeister 1868) macro-, from makrós (μακρός), large; stóma (στόμα), mouth, presumably referring to greatly expanded oral disc of spawning adults