Description Miralda diadema

apertural view of miralda diadema

the white, small shell grows length of 1.8 mm. subovate, minutely umbilicated, summits of whorls decidedly tabulated. 2 helicoid whorls of protoconch moderately large, , one-third immersed in later whorls. 5 whorls of teleoconch moderately rounded, decidedly tabulated @ summit,. ornamented rounded, axial ribs diminish in strength pass summit of whorls periphery. sixteen of these ribs occur upon second, , twenty upon penultimate whorl. ribs thickened @ anterior termination of shoulder , render decidedly crenulated. intercostal spaces little wider ribs. in addition axial ribs whorls marked strong spiral cords, 2 of can seen between sutures on first , second , 4 , one-half upon penultimate whorl. junction of posterior 1 of these 2 cords and

the axial ribs form series of tubercles. anterior cord tuberculated, ribs extending feebly it. periphery , base of body whorl rounded, latter decidedly attenuated , marked 7 subequal , subequally spaced spiral keels. suboval aperture large. posterior angle obtuse. outer lip thick. columella re-enforced attenuated base, curved. provided conspicuous obliquie fold near insertion. parietal wall covered moderately thick callus.