Janospira

Janospira
Temporal range: Ordovician[1]
Scientific classification
Kingdom: Animalia
Phylum: incertae sedis
Genus: †Janospira

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]

References

  1. 1 2 3 Fortey, RICHARD A.; Whittaker, John E. (1976). "Janospira - an Ordovician microfossil in search of a Phylum". Lethaia. 9 (4): 397. doi:10.1111/j.1502-3931.1976.tb00980.x.
  2. ↑ Yochelson, ELLIS L. (1977). "Comments on Janospira". Lethaia. 10 (3): 204. doi:10.1111/j.1502-3931.1977.tb00612.x.
  3. ↑ POKORNý, VLADIMÍR (January 1978). "Janospira, a presumed archaeogastropod". Lethaia. 11 (1): 80. doi:10.1111/j.1502-3931.1978.tb01220.x. Retrieved 4 July 2016.
  4. ↑ Paterson, John R. (2001). "First occurrence of Janospira from the Early Ordovician of Australia". Alcheringa: An Australasian Journal of Palaeontology. 25: 129–130. doi:10.1080/03115510108619218.


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