Milnesium swolenskyi

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Milnesium swolenskyi
Temporal range: Late Turonian
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Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Tardigrada
Class: Eutardigrada
Order: Apochela
Family: Milnesiidae
Genus: Milnesium
Species:
M. swolenskyi
Binomial name
Milnesium swolenskyi
Bertolani and Grimaldi 2000

Milnesium swolenskyi is a species of tardigrade from the Cretaceous period. [1] It, Beorn and Paradoryphoribius are the only known tardigrade genera in the fossil record. [2] The type specimen AMNH NJ-796 was found in Turonian New Jersey amber, from about 93.9 to 89.8 million years ago (mya). [3] [4] [5]

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Lebanese amber is fossilized resin found in Lebanon and southwest Syria. It dates back approximately 130-125 million years to the Barremian of the Early Cretaceous. It formed on what was then the northern coast of Gondwana, believed to be a tropical or subtropical zone in a temperate or hot climate. It is the oldest source of amber with a significant number of inclusions. Up to 300 sources of Lebanese amber have been recovered and 17 of them are important sources of organic inclusions, which are the oldest of their kind. The inclusions help to document Cretaceous fauna and flora.

Charentese amber is a type of amber that is found in sediments in the Charente-Maritime area of France. It dates to the late Albian to early Cenomanian stages of the mid-Cretaceous, around 100 million years ago. Charentese amber has been known since the early 19th century and was originally referred to as succin, succinic resin, or retinasphalt. The amber is known for its high quality and preservation of inclusions, such as insects, plant debris and other organisms. It is a valuable resource for paleontologists and other scientists studying the biodiversity of ancient ecosystems. The amber is often, but not always, opaque, requiring the usage of X-ray microtomography in order to observe specimens.

References

  1. "Milnesium swolenskyi". www.marinespecies.org. Retrieved 2020-05-09.
  2. Grimaldi, David; Engel, Michael S.; Engel, Michael S. (2005-05-16). Evolution of the Insects. Cambridge University Press. ISBN   978-0-521-82149-0.
  3. "†Milnesium swolenskyi Bertolani and Grimaldi 2000 (water bear)". PBDB.
  4. "Worlds Oldest Tardigrade Found In New Jersey - tardigrade.us" (PDF). Tardigrade US.
  5. Penney, David (2010). Biodiversity of Fossils in Amber from the Major World Deposits. Siri Scientific Press. ISBN   978-0-9558636-4-6.

Literature

  1. Guidetti R, Bertolani R (2005) Tardigrade taxonomy: an updated check list of the taxa and a list of characters for their identification. Zootaxa 845: 1-46
  2. Penney D. Biodiversity of Fossils in Amber from the Major World Deposits, Siri Scientific Press, 2010 - 304 pp.