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FIGURE 5: A–D, Holotype of Brookula charleenae sp. nov. (ZSM Mol 20070879) from Antarctica, South Sandwich Islands (58°15.98'S 24°53.72'W to 58°16.13'S 24°53.87'W), 2947–2970 m depth. A, Ventral view of the complete shell. B, View of the shell base showing the circular, deep opening of the umbilicus. C, Detail of fig. A, showing the protoconch and the first 1.5 teleoconch whorls. D, Detail of fig. C to show the fine protoconch ornamentation.