I propose this generic name for Cyclostrema fluctuata, Hutton. This species, along with Leptothyra crassicostata Murdoch, belongs to a group confused with Leptothyra and Collonia. The true species of Leptothyra are very different shells, with different opercular characters. Collonia is a name that has been recently restricted to fossil shells somewhat recalling Argalista, but the name is so uncertain that it cannot be here recommended for usage.
I have before me new species of Argalista, and Hedley has described Liotia latebrosa in 1907 (see under Leptothyra imperforata Suter, ante) and more recently Leptothyra fugitiva (Zool. Res. Fish. Ex. “Endeavour,” pt. i, p. 102, pl. 18, figs. 18–20, 1911), which probably, with Teinostoma rotatum Hedley (Mem. Austr. Mus., iii, p. 553, fig. 65 in text, 1899) and many other species, would fall into the present genus.”
(Iredale, 1915: 445)
Argalista is a genus of sea snails, marine gastropod mollusks in the family Colloniidae.[2]
These marine species are endemic to New Zealand, except Argalista kingensis, which occurs off Tasmania and Argalista rosea, which occurs off Victoria, Australia.
Species within the genus Argalista include:
Argalista is a genus of sea snails, marine gastropod mollusks in the family Colloniidae.
