Wanne daga cikin wadannan ba rukuni na dabbobi ba ne: Iagerstatten, cnidarians ko cypdippids? Bisa ga tambayar da ta gabata, ka rubuta mahallin da ke ɗauke da amsar. Zai iya zama jumla 1 - 20. Abubuwan da ke ciki:
Duk da jikinsu mai laushi, mai laushi, burbushin halittu da aka yi tunanin wakiltar ctenophores, a bayyane ba tare da tentacles ba amma da yawa-jerin gogewa fiye da nau'ikan zamani, an samo su a cikin lagerstätten har zuwa farkon Cambrian, kimanin shekaru miliyan 515 da suka gabata. Matsayin ctenophores a cikin bishiyar dangin dabbobi na juyin halitta an daɗe ana muhawara, kuma mafi yawan ra'ayi a halin yanzu, bisa ga ilimin kwayoyin halitta, shine cnidarians da bilaterians suna da alaƙa da juna fiye da ko dai ctenophores. Wani bincike na phylogenetics na kwayoyin kwanan nan ya kammala cewa kakannin kowa na dukkan ctenophores na zamani sun kasance kamar cydippid, kuma duk rukunin zamani sun bayyana kwanan nan, mai yiwuwa bayan Cretaceous <unk> Paleogene bacewar taron shekaru miliyan 66 da suka gabata. Shaidar da aka tara tun daga shekarun 1980 ta nuna cewa "cydippids" ba monophyletic bane, a wasu kalmomin ba su haɗa da duka ba kuma kawai zuriyar magabata guda ɗaya, saboda duk sauran ƙungiyoyin gargajiya na gargajiya zuriyar cydippids ne.