Name: Tamisiocaris ‭(‬sieve shrimp‭)‬.
Phonetic: Tam-is-e-o-kar-iss.
Named By: A.‭ ‬C.‭ ‬Daley‭ & ‬J.‭ ‬S.‭ ‬Peel‭ ‬-‭ ‬2010.
Classification: Arthropoda,‭ ‬Dinocaridida,‭ ‬Radiodonta,‭ ‬Anomalocarida.
Species: T.‭ ‬borealis‭ (‬type‭)‬.
Diet: Filter feeder.
Size: Reconstructed to be about‭ ‬70‭ ‬centimetres long.
Known locations: Greenland‭ ‬-‭ ‬Buen Formation Formation.
Time period: Early Cambrian.
Fossil representation: Fossils of at least two individuals.

       Tamisiocaris was first described as a possible anomalocaridid back in‭ ‬2010,‭ ‬but by‭ ‬2014‭ ‬the genus was not only being confirmed as an anomalocaridid,‭ ‬but as a filter feeder.‭ ‬Anomalocaridids generally have two curving appendages that depending upon the genus,‭ ‬are usually situated in front of the head.‭ ‬The appendages on Tamisiocaris had many more backward facing bristles that other genera and they were very fine forming a comb-like structure.‭ ‬This‭ ‘‬combs‭’ ‬are thought to have been swept through the water so that small aquatic organisms from plankton to small invertebrates were caught in them.‭ ‬The appendages would then curl back around and deliver the bristles to the mouth where they would be sucked clean of the trapped organisms.
       In‭ ‬2015‭ ‬a new anomalocaridid named Aegiroscassis was named,‭ ‬and this is also thought to have been a filter feeder,‭ ‬and one that reached very large sizes.

Further reading
-‭ ‬A Possible Anomalocaridid from the Cambrian Sirius Passet Lagerstätte,‭ ‬North Greenland.‭ ‬-‭ ‬Journal of Paleontology‭ ‬84‭(‬2‭)‬:352-355.‭ ‬-‭ ‬A.‭ ‬C.‭ ‬Daley‭ & ‬J.‭ ‬S.‭ ‬Peel‭ ‬-‭ ‬2010.
-‭ ‬A suspension-feeding anomalocarid from the Early Cambrian.‭ ‬-‭ ‬Nature‭ ‬507:496-499.‭ ‬-‭ ‬J.‭ ‬Vinther,‭ ‬M.‭ ‬Stein,‭ ‬N.‭ ‬R.‭ ‬Longrich‭ & ‬D.‭ ‬A.‭ ‬T.‭ ‬Harper‭ ‬-‭ ‬2014.


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