சீப்பு இழுது
{{taxobox
 | name = சீப்பு இழுது
 | fossil_range = {{geo range|540|0|ref=&lt;ref name=&quot;Chen2007&quot;&gt;{{cite journal | last1 = Chen | first1 = Jun-Yuan | last2 = Schopf | first2 = J. William | last3 = Bottjer | first3 = David J. | last4 = Zhang | first4 = Chen-Yu | last5 = Kudryavtsev | first5 = Anatoliy B. | last6 = Tripathi | first6 = Abhishek B. | last7 = Wang | first7 = Xiu-Qiang | last8 = Yang | first8 = Yong-Hua | last9 = Gao | first9 = Xiang | last10 = Yang | first10 = Ying | date = April 2007 | title = Raman spectra of a Lower Cambrian ctenophore embryo from southwestern Shaanxi, China | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 104 | issue = 15 | pages = 6289–6292 | doi = 10.1073/pnas.0701246104 | pmid=17404242 | pmc=1847456| bibcode = 2007PNAS..104.6289C }}&lt;/ref&gt;&lt;ref name=&quot;Stanley1983&quot;&gt;{{Cite journal | last1 = Stanley | first1 = G. D. | last2 = Stürmer | first2 = W. | doi = 10.1038/303518a0 | title = The first fossil ctenophore from the Lower Devonian of West Germany | url = https://archive.org/details/sim_nature-uk_1983-06-09_303_5917/page/518 | journal = Nature | volume = 303 | issue = 5917 | pages = 518–520 | date = 9 June 1983 | pmid = | pmc = |bibcode = 1983Natur.303..518S }}&lt;/ref&gt;&lt;ref name=&quot;Morris1996&quot;&gt;{{Cite journal | last1 = Conway Morris | first1 = S. | last2 = Collins | first2 = D. H. | doi = 10.1098/rstb.1996.0024 | title = Middle Cambrian Ctenophores from the Stephen Formation, British Columbia, Canada | journal = Philosophical Transactions of the Royal Society B: Biological Sciences | volume = 351 | issue = 1337 | pages = 279–308 | date = 29 March 1996}}&lt;/ref&gt;}}
 | image = Haeckel Ctenophorae.jpg
 | image_caption = சீப்பு இழுதுகள் ஓவியம்&lt;br/&gt;&lt;small&gt;from Ernst Haeckel's ''Kunstformen der Natur'', 1904
 | regnum = விலங்கினம்
 | subregnum = ஈரடுக்கி
 | phylum = '''சீப்பு இழுதுகள்'''
 | authority = [[Johann Friedrich von Eschscholtz|Eschscholtz]], 1829
 | type_species = ''[[Mnemiopsis leidyi]]''&lt;ref&gt;{{Cite journal|last=Ryan|first=J. F.|last2=Pang|first2=K.|last3=Schnitzler|first3=C. E.|last4=Nguyen|first4=A.-D.|last5=Moreland|first5=R. T.|last6=Simmons|first6=D. K.|last7=Koch|first7=B. J.|last8=Francis|first8=W. R.|last9=Havlak|first9=P.|date=2013-12-13|title=The Genome of the Ctenophore Mnemiopsis leidyi and Its Implications for Cell Type Evolution|url=http://www.sciencemag.org/cgi/doi/10.1126/science.1242592|journal=Science|language=en|volume=342|issue=6164|pages=1242592–1242592|doi=10.1126/science.1242592|issn=0036-8075|pmc=3920664|pmid=24337300}}&lt;/ref&gt;
 | subdivision_ranks = [[Class (biology)|Classes]]
 | subdivision = *[[Tentaculata]]
 *[[Nuda]]
 *{{extinct}}[[Scleroctenophora]]&lt;ref name=&quot;A vanished history of skeletonization in Cambrian comb jellies&quot;&gt;{{Cite journal |doi=10.1126/sciadv.1500092|pmid=26601209|pmc=4646772|title=A vanished history of skeletonization in Cambrian comb jellies|journal=Science Advances|volume=1|issue=6|pages=e1500092|date=July 2015|last1=Shu|first1=Degan|last2=Zhang|first2=Zhifei|last3=Zhang|first3=Fang|last4=Sun|first4=Ge|last5=Han|first5=Jian|last6=Xiao|first6=Shuhai|last7=Ou|first7=Qiang|bibcode=2015SciA....1E0092O}}&lt;/ref&gt;
 }}
 
 '''சீப்பு இழுது''' (''Ctenophora'') என்பது கடலில் வாழும் [[முதுகெலும்பிலி]]களை உள்ளடக்கிய ஒரு [[தொகுதி (உயிரியல்)|தொகுதி]] ஆகும். இதுவே தன் உடல் மயிர்களின் உதவியால் நீந்தும் விலங்கினங்களில் மிகப்பெரிய அளவுடையது ஆகும். இதில் மொத்தம் 100 முதல் 150 இனங்கள் வரை உள்ளன. 
 
 ==மேற்கோள்கள்==
 {{reflist}}
 
 {{கடல்வாழ் உயிரினங்கள்}}