Brookula proseila
Brookula proseila is a species of sea snail, a marine gastropod mollusk unassigned in the superfamily Seguenzioidea.
Description
Size & shape: A minute, trochiform shell with an elevated spire; adults reach ~1.91 mm in height and ~1.67 mm in width; shell color white.Protoconch: Globose, ~ whorls, ~260 μm in diameter; surface with dense, anastomosing micro-ribs forming tiny alveolar pits. Teleoconch: Up to 3 whorls; whorl profile generally convex but slightly flattened just below a deep suture. Axial sculpture: Strong, narrow, orthocline ribs ; interspaces broad ; fine microscopic axial lines present in the interspaces. Critically, the axial ribs do not enter the umbilicus.Spiral sculpture: About 20 thin, regularly spaced cords on the last whorl plus base; cords cross the axial ribs. Around the umbilicus there are 3–4 stronger spiral cords that surround and enter the umbilical opening. Aperture & umbilicus: Aperture rounded, holostomate; outer lip thin. The umbilicus is deep and circled by the stronger spiral cords noted above.
Distribution
This species occurs in the Atlantic Ocean off Brazil, found at depths between 50 m and 900 m.