Gastrochaenidae: Gastrochaena cuneiformis Spengler, 1783 (‘cuneiform gastrochaena’)

Synonym(s): cuneiformis Spengler, 1783 gigantea Deshayes, 1830 frondosa Cotton, 1930 hawaiiensis Dall, Bartsch & R

Typical shell-length 40 mm. Lives subtidally and offshore embedded in hard sediments such as compacted mud and soft rock, living within a crypt lined with shelly material and with only the siphons extending via shelly tubes. Native. Endemic to southern and eastern Australia (QLD, NSW, TAS, VIC and SA).