Helixotionella spiralis is found from the Recent of Western Australia, and has also been collected from the Tertiary of southeastern Australia. The illustrations are of a fossil specimen.
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| Colony frontal surface | Detail of zooids and avicularia |
Original description: Selenaria marginata var. spiralis Chapman, 1913.
Locality: Mallee Bore No.9, Vic., Australia.
Type specimen: NMV P12456.
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