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Taxon profile

genus

Antimelatoma Powell, 1942

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Caenogastropoda »  family Turridae

Shell small to moderate sized, 14 - 18 mm., narrowly fusiform, with a tall spire and a moderately long unnotched slightly flexed anterior canal. Sinus broad, retracted to a rather narrowly U-shaped apex, which is just below the middle of the shoulder slope. Protoconch blunt, paucispiral, of slightly more than two whorls; first smooth, dome-shaped, second with four spiral cords. Outer lip thin; inner lip without a parietal tubercle or callus pad. Adult sculpture of prominent fold-like axials, restricted to the peripheral area, and rather strong spiral cords, that override the axials. Operculum leaf-shaped, with a terminal nucleus. Radula of modified wishbone-type, consisting of a pair of marginals, in which one of the basal limbs is severed. The result is a large elongated elliptical tooth, partially overlaid by a slightly shorter but much more slender member (M. ahiparana). The genus is somewhat of clavinid facies, except for the style of sinus and absence of a parietal tubercle, but its true relationship seems to be with the turriculinids, near to Comitas. Range — New Zealand, Recent and Pleistocene.

Sources

Powell, A.W.B. : The Molluscan Families Speightiidae and Turridae. 1966.
Author: Jan Delsing

Subordinated taxa

Number of records: 4

species Antimelatoma ahiparana A. W. B. Powell, 1942
species Antimelatoma benthicola A. W. B. Powell, 1942
species Antimelatoma buchanani (Hutton, F.W., 1873)
species Antimelatoma canyonensis Dell, 1956

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