Extinct genus of molluscs
Janospira is a microfossil known from Ordovician deposits, whose affinity is uncertain. It resembles a spiral shell mounted on a cylinder, probably calcareous, about 1 mm in length. There are compelling reasons to discount a foramaniferan or molluscan affinity, though, some researchers presume it to be an archaeogastropod.
Species of "Janospira" are known from northern Spitsbergen, Norway, and from Australia
References.
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