<div class="floatright"><a href="//commons.wikimedia.org/wiki/File:Haeckel_Actiniae_big_spots.jpg" class="image"><img alt="Haeckel Actiniae big spots.jpg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Haeckel_Actiniae_big_spots.jpg/200px-Haeckel_Actiniae_big_spots.jpg" decoding="async" width="200" height="285" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Haeckel_Actiniae_big_spots.jpg/300px-Haeckel_Actiniae_big_spots.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Haeckel_Actiniae_big_spots.jpg/400px-Haeckel_Actiniae_big_spots.jpg 2x" data-file-width="2276" data-file-height="3244"></a></div>
<ol><li><i>Heliactis bellis</i> <small>(Thompson)</small> = <i><a href="//commons.wikimedia.org/wiki/Cereus" title="Cereus">Cereus</a> <a href="//commons.wikimedia.org/w/index.php?title=Cereus_pedunculatus&amp;action=edit&amp;redlink=1" class="new" title="Cereus pedunculatus (page does not exist)">pedunculatus</a></i> <small>(Pennant, 1777)</small></li>
<li><i>Mesacmaea stella</i> [<i>sic</i>] <small>(Andres)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Mesacmaea&amp;action=edit&amp;redlink=1" class="new" title="Mesacmaea (page does not exist)">Mesacmaea</a> <a href="//commons.wikimedia.org/w/index.php?title=Mesacmaea_stellata&amp;action=edit&amp;redlink=1" class="new" title="Mesacmaea stellata (page does not exist)">stellata</a></i> <small>(Andrès, 1881)</small></li>
<li><i>Aiptasia Couchii</i> <small>(Gosse)</small> = <i><a href="//commons.wikimedia.org/wiki/Aiptasia" title="Aiptasia">Aiptasia</a> <a href="//commons.wikimedia.org/w/index.php?title=Aiptasia_mutabilis&amp;action=edit&amp;redlink=1" class="new" title="Aiptasia mutabilis (page does not exist)">mutabilis</a></i> <small>(Gravenhorst, 1831)</small></li>
<li><i>Cylista impatiens</i> <small>(Dana)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Choriactis&amp;action=edit&amp;redlink=1" class="new" title="Choriactis (page does not exist)">Choriactis</a> <a href="//commons.wikimedia.org/w/index.php?title=Choriactis_impatiens&amp;action=edit&amp;redlink=1" class="new" title="Choriactis impatiens (page does not exist)">impatiens</a></i> <small>(Couthouy in Dana, 1846)</small></li>
<li><i>Bunodes thallia</i> <small>(Gosse)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Anthopleura&amp;action=edit&amp;redlink=1" class="new" title="Anthopleura (page does not exist)">Anthopleura</a> <a href="//commons.wikimedia.org/w/index.php?title=Anthopleura_thallia&amp;action=edit&amp;redlink=1" class="new" title="Anthopleura thallia (page does not exist)">thallia</a></i> <small>(Gosse, 1854)</small></li>
<li><i>Metridium praetextum</i> <small>(Couthouy)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Actinostella&amp;action=edit&amp;redlink=1" class="new" title="Actinostella (page does not exist)">Actinostella</a> <a href="//commons.wikimedia.org/w/index.php?title=Actinostella_flosculifera&amp;action=edit&amp;redlink=1" class="new" title="Actinostella flosculifera (page does not exist)">flosculifera</a></i> <small>(Lesueur, 1817)</small></li>
<li><i>Heliactis troglodytes</i> <small>(Thompson)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Sagartia&amp;action=edit&amp;redlink=1" class="new" title="Sagartia (page does not exist)">Sagartia</a> <a href="//commons.wikimedia.org/w/index.php?title=Sagartia_troglodytes&amp;action=edit&amp;redlink=1" class="new" title="Sagartia troglodytes (page does not exist)">troglodytes</a></i> <small>(Price, 1847)</small></li>
<li><i>Anthea cereus</i> <small>(Gosse)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Anemonia&amp;action=edit&amp;redlink=1" class="new" title="Anemonia (page does not exist)">Anemonia</a> <a href="//commons.wikimedia.org/wiki/Anemonia_sulcata" title="Anemonia sulcata">sulcata</a></i> <small>(Pennant, 1777)</small></li>
<li><i>Aiptasia undata</i> <small>(Martens)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Aiptasia_diaphana&amp;action=edit&amp;redlink=1" class="new" title="Aiptasia diaphana (page does not exist)">Aiptasia diaphana</a></i> <small>(Rapp, 1829)</small></li>
<li><i>Aiptasia diaphana</i> <small>(Andres)</small> = <i>Aiptasia diaphana</i> <small>(Rapp, 1829)</small></li>
<li><i>Bunodes monilifera</i> <small>(Dana)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Paractis&amp;action=edit&amp;redlink=1" class="new" title="Paractis (page does not exist)">Paractis</a> <a href="//commons.wikimedia.org/w/index.php?title=Paractis_monilifera&amp;action=edit&amp;redlink=1" class="new" title="Paractis monilifera (page does not exist)">monilifera</a></i> <small>(Drayton in Dana, 1846)</small></li>
<li><i>Corynactis viridis</i> <small>(Allman)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Corynactis&amp;action=edit&amp;redlink=1" class="new" title="Corynactis (page does not exist)">Corynactis</a> <a href="//commons.wikimedia.org/w/index.php?title=Corynactis_viridis&amp;action=edit&amp;redlink=1" class="new" title="Corynactis viridis (page does not exist)">viridis</a></i> <small>Allman, 1846</small></li>
<li><i>Metridium concinnatum</i> <small>(Dana)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Oulactis&amp;action=edit&amp;redlink=1" class="new" title="Oulactis (page does not exist)">Oulactis</a> <a href="//commons.wikimedia.org/w/index.php?title=Oulactis_concinnata&amp;action=edit&amp;redlink=1" class="new" title="Oulactis concinnata (page does not exist)">concinnata</a></i> <small>(Drayton in Dana, 1846)</small></li>
<li><i>Sagartia chrysoplenium</i> <small>(Gosse)</small> = <i><a href="//commons.wikimedia.org/w/index.php?title=Chrysoela&amp;action=edit&amp;redlink=1" class="new" title="Chrysoela (page does not exist)">Chrysoela</a> <a href="//commons.wikimedia.org/w/index.php?title=Chrysoela_chrysosplenium&amp;action=edit&amp;redlink=1" class="new" title="Chrysoela chrysosplenium (page does not exist)">chrysosplenium</a></i> <small>(Cocks in Johnston, 1847)</small></li>
<li><i>Actinoloba dianthus</i> <small>(Blainville)</small> = <i><a href="//commons.wikimedia.org/wiki/Metridium_senile" title="Metridium senile">Metridium senile</a></i> <small>(Linnaeus, 1761)</small></li></ol>
<bdi><a href="https://en.wikipedia.org/wiki/en:Ernst_Haeckel" class="extiw" title="w:en:Ernst Haeckel"><span title="German biologist, naturalist, philosopher, physician, and artist (1834-1919)">Ernst Haeckel</span></a>
</bdi>
1904
<i><a href="//commons.wikimedia.org/wiki/Kunstformen_der_Natur" title="Kunstformen der Natur">Kunstformen der Natur</a></i> (1904), plate/planche 49: Actiniae (see <a rel="nofollow" class="external text" href="http://caliban.mpiz-koeln.mpg.de/haeckel/kunstformen/high/Tafel_049_300.html">here</a>, <a rel="nofollow" class="external text" href="http://caliban.mpiz-koeln.mpg.de/haeckel/kunstformen/high/Tafel_049_schema_300.html">here</a>, <a rel="nofollow" class="external text" href="http://caliban.mpiz-koeln.mpg.de/haeckel/kunstformen/high/Tafel_049_text_1_200.html">here</a> and <a rel="nofollow" class="external text" href="http://caliban.mpiz-koeln.mpg.de/haeckel/kunstformen/high/Tafel_049_text_2_200.html">here</a>)