The earliest triploblasts are thought to have evolved from the diploblasts some time in the Proterozoic, establishing themselves as a group prior to the diversification of them during the Cambrian explosion.[4][5][6]
See also
Embryo – Multicellular diploid eukaryote in its earliest stage of development
Eumetazoa – Basal animal clade as a sister group of the Porifera
References
^Ravichandra (Jan 1, 2008). Plant Nematology. I. K. International Pvt Ltd. p. 29. ISBN9788189866617.
^Hooper, John (2018). . Queensland Museum. Archived from the original on 26 September 2019. Retrieved 27 September 2019.
^Thacker, Robert W; Diaz, Maria Christina (8 September 2014). "The Porifera Ontology (PORO): enhancing sponge systematics with an anatomy ontology". J Biomed Semantics. 5 (39): 39. doi:10.1186/2041-1480-5-39. PMC4177528. PMID 25276334.
^Gu, Xun (1998). "Early metazoan divergence was about 830 million years ago". Journal of Molecular Evolution. 47 (3): 369–371. Bibcode:1998JMolE..47..369G. doi:10.1007/PL00013150. PMID 9732464. S2CID 30228208.
^Lynch, Michael (1999). "The age and relationships of the major animal phyla". Evolution. 53 (2): 319–325. doi:10.1111/j.1558-5646.1999.tb03768.x. PMID 28565434. S2CID 6120649.
^Seilacher, Adolf; Pradip K., Bose; Pflüger, Friedrich (1998). "riploblastic animals more than 1 billion years ago: trace fossil evidence from India". Science. 282 (5386): 80–83. Bibcode:1998Sci...282...80S. doi:10.1126/science.282.5386.80. PMID 9756480.
triploblasty, condition, gastrula, which, there, three, primary, germ, layers, ectoderm, mesoderm, endoderm, germ, cells, aside, embryo, blastula, stage, which, incorporated, into, gonads, during, organogenesis, germ, layers, form, during, gastrulation, blastu. Triploblasty is a condition of the gastrula in which there are three primary germ layers the ectoderm mesoderm and endoderm Germ cells are set aside in the embryo at the blastula stage which are incorporated into the gonads during organogenesis The germ layers form during gastrulation of the blastula The term triploblast may refer to any egg cell in which the blastoderm splits into three layers 1 All bilaterians the animals with bilaterally symmetrical embryos are triploblastic Other animal taxa the ctenophores placozoans and cnidarians are diploblastic meaning their embryos contain only two germ layers Sponges are even less developmentally specialized lacking both true tissues 2 and organs 3 The earliest triploblasts are thought to have evolved from the diploblasts some time in the Proterozoic establishing themselves as a group prior to the diversification of them during the Cambrian explosion 4 5 6 See also EditEmbryo Multicellular diploid eukaryote in its earliest stage of development Eumetazoa Basal animal clade as a sister group of the PoriferaReferences Edit Ravichandra Jan 1 2008 Plant Nematology I K International Pvt Ltd p 29 ISBN 9788189866617 Hooper John 2018 Structure of Sponges Queensland Museum Archived from the original on 26 September 2019 Retrieved 27 September 2019 Thacker Robert W Diaz Maria Christina 8 September 2014 The Porifera Ontology PORO enhancing sponge systematics with an anatomy ontology J Biomed Semantics 5 39 39 doi 10 1186 2041 1480 5 39 PMC 4177528 PMID 25276334 Gu Xun 1998 Early metazoan divergence was about 830 million years ago Journal of Molecular Evolution 47 3 369 371 Bibcode 1998JMolE 47 369G doi 10 1007 PL00013150 PMID 9732464 S2CID 30228208 Lynch Michael 1999 The age and relationships of the major animal phyla Evolution 53 2 319 325 doi 10 1111 j 1558 5646 1999 tb03768 x PMID 28565434 S2CID 6120649 Seilacher Adolf Pradip K Bose Pfluger Friedrich 1998 riploblastic animals more than 1 billion years ago trace fossil evidence from India Science 282 5386 80 83 Bibcode 1998Sci 282 80S doi 10 1126 science 282 5386 80 PMID 9756480 This developmental biology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Triploblasty amp oldid 1072579011, wikipedia, wiki, book, books, library,
