Pinacocyte

Pinacocytes are flat cells found on the outside of sponges, as well as the internal canals of a sponge.[1] Pinacocytes are not specific to the sponge however. It was discovered that pinacocytes do not have as many sponge specific genes. These genes suggest that pinacocytes had evolved before the metazoan time period, which is, before porifera had evolved.[2]

  1. ^ Maldonado, Manuel; Riesgo, Ana (2007-06-01). "Intra-epithelial spicules in a homosclerophorid sponge". Cell and Tissue Research. 328 (3): 639–650. doi:10.1007/s00441-007-0385-7. ISSN 1432-0878. PMID 17340151. S2CID 9930528.
  2. ^ Sogabe, Shunsuke; Hatleberg, William L.; Kocot, Kevin M.; Say, Tahsha E.; Stoupin, Daniel; Roper, Kathrein E.; Fernandez-Valverde, Selene L.; Degnan, Sandie M.; Degnan, Bernard M. (June 2019). "Pluripotency and the origin of animal multicellularity". Nature. 570 (7762): 519–522. Bibcode:2019Natur.570..519S. doi:10.1038/s41586-019-1290-4. hdl:10023/19125. ISSN 0028-0836. PMID 31189954. S2CID 92562184.