Dalyia

{{Short description|Genus of marine worm-like animals}}{{Automatic_taxobox | fossil_range = {{fossil range|Cambrian}} | image = Smithsonian miscellaneous collections (1924) (14577200318).jpg | image_caption = Images from Walcott from fossils collected at the Burgess Shale, published in 1924. The bottom two photos are ''Dalyia nitens'' (left) and ''Dalyia racemata''.(right) | | taxon = Dalyia | authority = Walcott, 1919 }} '''''Dalyia''''' is a genus of worm-like fossilized organisms found in the Walcott Quarry and Trilobite beds of the Burgess Shale from the middle Cambrian.<ref name=":0">{{cite journal |doi=10.1111/pala.12200|title=Graptolite (Hemichordata, Pterobranchia) preservation and identification in the Cambrian Series 3|journal=Palaeontology|volume=58|issue=6|pages=1073–1107|year=2015|last1=Maletz|first1=Jörg|last2=Steiner|first2=Michael|bibcode=2015Palgy..58.1073M |s2cid=129341868 |doi-access=free}}</ref> Due to its branching structure, it was previously interpreted as a red alga. However further examinations in 2015 suggest they may instead be pterobranchs, a class of small tube-dwelling worms.<ref name=":0" /> It has smooth or faintly lineated stems, which branch into up to four equal branches at branching points. 37 specimens of ''Dalyia'' are known from the Greater Phyllopod bed, where they comprise 0.07% of the community.<ref name="Caron2006">{{cite journal|last1=Caron |first1=Jean-Bernard|last2=Jackson |first2=Donald A.|title=Taphonomy of the Greater Phyllopod Bed community, Burgess Shale|journal=PALAIOS |volume=21 |issue=5 |pages=451–65|date=October 2006|doi=10.2110/palo.2003.P05-070R|jstor=20173022|bibcode=2006Palai..21..451C |s2cid=53646959 }}</ref>

== References == {{Reflist}}

== External links == * {{Cite web|date=2011|title=''Dalyia racemata''|work=Burgess Shale Fossil Gallery|publisher=Virtual Museum of Canada|url=http://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=42|archive-url=https://web.archive.org/web/20201112025257/http://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=42|archive-date=2020-11-12|url-status=dead|access-date=2023-01-21}}

† Category:Burgess Shale fossils Category:Prehistoric hemichordate genera Category:Cambrian genus extinctions