Izumonauta

Izumonauta
Temporal range: Miocene
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Octopoda
Family: Argonautidae
Genus: †Izumonauta
Kobayashi, 1954
Species

Izumonauta is an extinct genus of shelled octopods from the Mid to Late Miocene of Japan and New Zealand.

The keels of Izumonauta eggcases lack tubercules and are intermediate in morphology between those of the earlier Obinautilus and later Argonauta.

The New Zealand fossil material was described from the Kapitean Stage (uppermost Miocene).

References

  1. ↑ Kobayashi, T. (1954). Izumonauta, a new genus of the Argonautinae, with a note on their rare but gregarious fossil occurrence. Japanese Journal of Geology and Geography 25: 21-34.
  2. ↑ Saul, L. & C. Stadum (2005). "Fossil Argonauts (Mollusca: Cephalopoda: Octopodida) From Late Miocene Siltstones Of The Los Angeles Basin, California". Journal of Paleontology. 79 (3): 520–531. Bibcode:2005JPal...79..520S. doi:10.1666/0022-3360(2005)079<0520:FAMCOF>2.0.CO;2. S2CID 131373540.[permanent dead link]
  3. ↑ Marshall, B.A. (1971). Izumonauta (Argonautidae, Cephalopoda, Coleoida) from the Kapitean Stage (Uppermost Miocene) of New Zealand. New Zealand Journal of Geology and Geophysics 14: 288-292.

Further reading