:en:Tamisiocaris

{{Short description|Extinct genus of marine animals}}

File:20210215 Tamisiocaris size.png

{{Speciesbox

| fossil_range = {{fossil_range|Cambrian Stage 3}}

| image = 20191228 Radiodonta frontal appendage Tamisiocaris borealis.png

| image2 = 20210630 Tamisiocaris borealis frontal appendage mobility.gif

| image2_caption = Movement of a frontal appendage

| genus = Tamisiocaris

| parent_authority = Daley & Peel, 2010

| species = borealis

| authority = Daley & Peel, 2010

}}

{{CEXNAV}}

Tamisiocaris (from Latin tamisium, sieve, and Greek karis, crab, shrimp) is a radiodont genus from the Cambrian period. The taxon was initially described in 2010 based on frontal appendages discovered from the Sirius Passet lagerstatte in northern Greenland.{{cite journal |last1=Daley |first1=Allison |last2=Peel |first2=John S. |name-list-style=amp |year=2010 |title=A possible anomalocaridid from the Cambrian Sirius Passet lagerstätte, North Greenland |url=https://www.academia.edu/368051 |journal=Journal of Paleontology |volume=84 |issue=2 |pages=352–355 |doi=10.1666/09-136R1.1|bibcode=2010JPal...84..352D }} A subsequent study by Vinther and colleagues in 2014 revealed that the frontal appendages were segmented and bore densely packed auxiliary spines, which were adapted to suspension feeding in a manner analogous to modern baleen whales.{{cite journal |last1=Vinther |first1=Jakob |last2=Stein |first2=Martin |last3=Longrich |first3=Nicholas R. |last4=Harper |first4=David A. T. |name-list-style=amp |year=2014 |title=A suspension-feeding anomalocarid from the Early Cambrian |url=https://durham-repository.worktribe.com/output/1427441 |journal=Nature |volume=507 |issue=7493 |pages=496–499 |doi=10.1038/nature13010 |pmid=24670770|bibcode=2014Natur.507..496V |hdl=1983/88f89453-e81f-4767-a74d-1794c33e6b34 |hdl-access=free }} It is assigned to the family Tamisiocarididae, and is measured about {{cvt|22.8|-|33.6|cm|ft}} long.{{cite journal |last1=Lerosey-Aubril |first1=Rudy |last2=Pates |first2=Stephen |name-list-style=and |date=September 2018 |title=New suspension-feeding radiodont suggests evolution of microplanktivory in Cambrian macronekton |journal=Nature Communications |volume=9 |issue=1 |pages=3774 |bibcode=2018NatCo...9.3774L |doi=10.1038/s41467-018-06229-7 |pmc=6138677 |pmid=30218075}} [https://datadryad.org/stash/dataset/doi:10.5061/dryad.1cf2fb0 Dryad Data]