Janospira ‐ an Ordovician microfossil in search of a Phylum

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Abstract
JANOSPIRA nodus is described from early Ordovician (Arenig) rocks of N Spitsbergen. It is a curious microfossil, probably calcareous, about 1 mm in length, made up of an initial coil which expands distally into a straight tube, at the same time as producing a narrower tube almost in line with the 1st but in the opposite direction. Although showing some similarities to Foraminifera, mollusks and polychaetes, there are objections to its inclusion in any of these groups, and it is equally probable that it belongs to an unknown group with a planktic early growth stage.

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