Janospira Explained

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,[1] [2] though, some researchers presume it to be an archaeogastropod.[3]

Species of Janospira are known from northern Spitsbergen, Norway,[1] and from Australia[4]

Notes and References

  1. 10.1111/j.1502-3931.1976.tb00980.x. Janospira - an Ordovician microfossil in search of a Phylum. 1976. Fortey, RICHARD A.. Richard Fortey. Lethaia. 9. 4. 397. Whittaker. John E. .
  2. 10.1111/j.1502-3931.1977.tb00612.x. Comments on Janospira. 1977. Yochelson, ELLIS L.. Lethaia. 10. 3. 204 .
  3. Janospira, a presumed archaeogastropod . VLADIMÍR . POKORNý . January 1978 . 10.1111/j.1502-3931.1978.tb01220.x . 11 . 1 . Lethaia . 80.
  4. First occurrence of Janospira from the Early Ordovician of Australia . John R. . Paterson . 10.1080/03115510108619218 . 2001 . 25 . Alcheringa: An Australasian Journal of Palaeontology . 129–130. 129236604 .

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