paragraph_text: <gallery> Image:Haikouella lanceolata China.jpg|<center>Haikouella lanceolata Image:Misszhouia_longicaudata_2.jpg|<center>Naraoia taijiangensis Image:Heliomedusa_orienta.jpg|<center>Heliomedusa orienta Image:Leanchoilia_illecebrosa.jpg|<center>Leanchoilia illecebrosa </gallery>