檢視環蛸枕的原始碼

{| class="wikitable" style="float:right; margin: -10px 0px 10px 20px; text-align:left"
|<center>'''環蛸枕'''<br><img src="https://www.nhm.ac.uk/resources/research-curation/projects/echinoid-directory/images/2066/specimen6905.jpg" width="280"></center><small>[https://www.nhm.ac.uk/our-science/data/echinoid-directory/taxa/specimen.jsp?id=6905 圖片來自nhm]</small> 
|}

'''環蛸枕'''（[[學名]]：'''''Linthia'''''），又名'''林西海膽'''，是一[[屬]]已[[滅絕]]的[[海膽]]。牠們生存於[[晚白堊紀]]至[[上新世]]。其[[化石]]分佈在[[非洲]]、[[亞洲]]、[[歐洲]]、[[北美洲]]及[[南美洲]]。<ref>[http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=33417 ''Linthia''] in the [[Paleobiology Database]]</ref>

== 特徵 ==
環蛸枕是一種很小、緊密的[[心海膽]]，在其前端有很突出的深凹口，線條分明的[[花瓣]]狀步帶長有孔。頂盤上四個大[[生殖]]孔用於排放[[卵細胞|卵]]和[[精子]]。牠們生活在鬆軟沉積的洞穴裡。<ref>{{cite book | title=自然珍藏系列──化石圖鑑 | location = [[台灣]][[新北市]] | publisher=[[貓頭鷹出版社]] | author= Cyril Walker | author2= Davod Ward | authorlink=Cyril Walker (palaeontologist) | authorlink2=David Ward (palaeontologist) | series=自然珍藏系列 | year=2002 | page=183 | date = 2002-02 | language = zh-hant}}</ref><ref>{{cite book | title=Fossils | publisher=[[多林金德斯利|Dorling Kindersley]] | author=Walker, Cyril | last2=Ward | first2=David | authorlink=Cyril Walker (palaeontologist) | authorlink2=David Ward (palaeontologist) | series=Smithsonian Handbooks | year=2002 | page=183 | isbn=0789489848 | edition=revised, illustrated}}</ref>

== 參考文獻 == 
{{reflist}}
[[Category: 380 動物學總論]]