Name: Sidneyia ‭(‬named after Sidney Wallcott‭).
Phonetic: Sid-ney-ah.
Named By: Charles Walcott‭ ‬-‭ ‬1911.
Classification: Arthropoda,‭ ‬Limulavida.
Species: S.‭ ‬inexpectans‭ (‬type‭)‬.
Diet: Carnivore.
Size: Largest specimens up to‭ ‬12.7‭ ‬centimetres long.
Known locations: Canada,‭ ‬British Columbia‭ ‬-‭ ‬Burgess Shale.,‭ ‬Possibly also the USA.
Time period: Cambrian.
Fossil representation: Well over‭ ‬100‭ ‬individuals.

       Sidneyia is thought to have been a carnivore of other bottom dwelling marine organisms,‭ ‬scouring the ocean floor and sensing them out with its antennae.‭ ‬So far Sidneyia is known from well over a hundred specimens,‭ ‬with many more likely to yet be found.‭ ‬Individuals ran from about five centimetres to just under thirteen centimetres on length.‭ ‬Sidneyia was named by Charles Walcott in‭ ‬1911,‭ ‬and he named it after his son Sidney who actually discovered the first specimens.

Further reading
-‭ ‬Taphonomy of the Greater Phyllopod Bed community,‭ ‬Burgess Shale.‭ ‬-‭ ‬PALAIOS‭ ‬21‭ (‬5‭) ‬-Jean-Bernard Caron‭ & ‬Donald A.‭ ‬Jackson‭ ‬-‭ ‬2006.
- New occurrence of the Burgess Shale arthropod Sidneyia in the Early Cambrian Chengjiang Lagerstätte (South China), and revision of the arthropod Urokodia. - Alcheringa: An Australasian Journal of Palaeontology. 26: 1–8. - Xingliang Zhang, Jian Han & Degan Shu - 2008.
- Reconstructing the diet of a 505-million-year-old arthropod: Sidneyia inexpectans from the Burgess Shale fauna. - Arthropod Structure & Development. 45 (2): 200–220. - Axelle Zacaï, Jean Vannier & Rudy Lerosey-Aubril - 2016.
- The gnathobasic spine microstructure of recent and Silurian chelicerates and the Cambrian artiopodan Sidneyia : Functional and evolutionary implications. - Arthropod Structure & Development. 47 (1): 12–24. - Russell D. C. Bicknell, John R. Paterson, Jean-Bernard Caron & Christian B Skovsted - 2017.


Random favourites