Optoturris optatus
Optoturris optatus is an extinct species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids. Description
The length of the shell attains 16.5 mm; the maximum diameter is 6 mm; length of the aperture: 9.5 mm. (Original description) The shell has a fusiform shape. The aperture (with siphonal canal) measures more than ½ the length of the whole shell. The shell contains seven whorls, slightly convex, keeled above and below the suture, which is near the centre of the whorls, the anterior keel being the most prominent. The other ornament consists of several closely-set small spiral lineations, crossed by rather conspicuous growth lines, and accompanied by a peculiar damascened structure. The protoconch is composed of two smooth whorls, the anterior being subangulate and vertically striated It terminates abruptly against the shell of the brephic stage, which is longitudinally, obliquely costated and marginate. The aperture is elongately pyriform, much constricted anteriorly. The outer lip is thin and  undulating. The sinus is broad and shallow. The columella is covered by a thin deposit of vertically striated callus and is twisted anteriorly. The siphonal canal is long, curved and broad in front. Distribution
Fossils of this marine species were found in  Miocene strata in Victoria, Australia. References

External links
 Thomson, Kirstie. Evolutionary patterns and consequences of developmental mode in Cenozoic gastropods from southeastern Australia. Diss. University of Liverpool, 2013.

optatus
Gastropods described in 1894
Miocene gastropods