Yicaris

Yicaris
Temporal range: Cambrian Stage 3
Artist's reconstruction of Yicaris dianensis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Clade: Pancrustacea
Genus: †Yicaris
Zhang et al., 2007
Type species
†Yicaris dianensis
Zhang et al., 2007

Yicaris dianensis is a species of microscopic pancrustacean[1][2] found in the Yu’anshan Formation, Yunnan Province, China.[3] Yicaris' discovery is notable because its age suggests that true crustaceans already existed as far back in time as Early Cambrian, much earlier than other fossils known from the Middle and Late Cambrian. Its closest living relatives are believed to be Cephalocaridans.[4]

  1. ^ Daley, Allison C.; Antcliffe, Jonathan B.; Drage, Harriet B.; Pates, Stephen (2018-05-22). "Early fossil record of Euarthropoda and the Cambrian Explosion". Proceedings of the National Academy of Sciences. 115 (21): 5323–5331. Bibcode:2018PNAS..115.5323D. doi:10.1073/pnas.1719962115. PMC 6003487. PMID 29784780.
  2. ^ "Early Crustacean Evolution and the Appearance of Epipods/Gills". ResearchGate. Retrieved 2020-11-04.
  3. ^ Zhang, Xi-guang; Siveter, David; Waloszek, Dieter; Maas, Andreas (4 October 2007). "An epipodite-bearing crown-group crustacean from the Lower Cambrian". Nature. 449 (7162): 595–598. Bibcode:2007Natur.449..595Z. doi:10.1038/nature06138. PMID 17914395. S2CID 4329196.
  4. ^ Wolfe, Joanna M.; Hegna, Thomas A. (2014). "Testing the phylogenetic position of Cambrian pancrustacean larval fossils by coding ontogenetic stages". Cladistics. 30 (4): 366–390. doi:10.1111/cla.12051. ISSN 1096-0031. PMID 34788971. S2CID 86382575.