Biology:Calcaronea
From HandWiki
Calcaronea is a subclass of sea sponges in the class Calcarea, generally characterized by asymmetrical three-rayed (triactine) spicules, although some unusual specimens do have evenly-arranged rays. The nucleus of the choanocyte sits at the top of the cell (apinucleate) with the flagellum connected to it. It's larval form is a hollow ball of cells with an opening at one end, or stomoblastula, which eventually turns inside-out and forms a free-swimming, flagellated amphiblastula. Two-rayed (diactine) spicules are the first skeletal structures to develop as the sponge grows.[1]
References
- ↑ Soest, Rob W. M. Van; Boury-Esnault, Nicole; Vacelet, Jean; Dohrmann, Martin; Erpenbeck, Dirk; Voogd, Nicole J. De; Santodomingo, Nadiezhda; Vanhoorne, Bart et al. (2012-04-27). "Global Diversity of Sponges (Porifera)" (in en). PLOS ONE 7 (4). doi:10.1371/journal.pone.0035105. ISSN 1932-6203. PMID 22558119. Bibcode: 2012PLoSO...735105V.
External links
- World Register of Marine Species link: Calcaronea (+species list)
- "Calcaronea". National Center for Biotechnology Information (NCBI). https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=45124.
Wikidata ☰ Q1985953 entry
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