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Atlanta brunnea is a small species (shell diameter to 2.0 mm) that is darkly pigmented (brown to reddish-and golden-brown). The keel is tall and colorless, and inserts between the last and penultimate shell whorls in animals larger than 1.5 mm. The spire is tall and conical, consisting of 4 whorls and possessing a complex pattern of spiral sculpture that ends on the protoconch and is replaced by spiral rows of small punctae on the teleoconch. Coloration ranges from brown to amber and reddish-brown. Eyes type a, operculum type a, and radula type I. Geographic distribution is cosmopolitan in tropical to subtropical waters.


  • Maximal shell diameter = 2.0 mm
  • Keel tall and colorless, and inserts between last and penultimate whorls in shells > 1.5 mm diameter
  • Spire tall and conical, with ornate, complex sculpture
  • Coloration brown to amber and reddish-brown
  • Eyes type a; operculum type a; radula type I


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