Height/length 0,75, apex high, strongly recurved and projecting posteriorly, laterally rather compressed; selenizone slightly sunken, lunulae rather low, dorsally-directed, 5-8 per mm; sculpture of about 46 close, rounded radial ribs, alternately weaker and stronger, with a smaller secondary rib between each pair; six anterior ribs are stronger than the others; concentric threads regular, overriding radials, subequal to secondary ribs, forming low, almost squamiform nodules; interstices chalky, pit-like, mainly divided into pairs by a microlirule; pale olivaceous, with dark olive-green dots on secondary ribs and borders of anal slit; maximum length 6,9 mm. Description: Basal outline oblong-ovate, greatest width just posterior to middle; height/length 0,75; apex very high, strongly recurved, projecting slightly beyond posterior margin, inclined slightly to the right; posterior face very concave, sides slightly so, anterior face strongly arched, base gently concave. Anal slit narrow, fairly deep; bordering flanges thin, raised, crenulate slightly inclined; left termination projecting slightly beyond right; selenizone slightly sunken, with rather low, dorsally-directed lunulae, 5-8 per mm, more or less corresponding to concentric lirae; selenizone forming a callous ridge internally. Sculpture of close-set, rounded radial ribs, totalling about 46; alternate main ribs are weaker and strong, and each interval is occupied by an even weaker secondary rib; three main ribs on either side of anal slit distinctly stronger than the rest. Concentric threads very regular and overriding the radials, subequal to secondary ribs in strength; they are dorsally directed, and form low, almost squamiform nodules where they cross the ribs, being most strongly developed anteriorly. Interstices foveolate, chalky, and for the most part divided into radially elongate, paired pits by a flattened microradial. Inner ventral margin pliculate. Colour very pale olivaceous, with traces of faint brownish blotches laterally, secondary radial ribs and flanges bordering anal slit with scattered dark olive-green dots; interior whitish, with the external coloration showing through. Dimensions: 6,9 (basal length) x 4,8 x 5,2 mm, anal slit 3,0 mm deep (holotype).