{"refrec":{"BRefID":256328,"RR":"<b>Tiemann, H.; Jarms, G.</b> (2010). Organ-like gonads, complex oocyte formation, and long-term spawning in <i>Periphylla periphylla</i> (Cnidaria, Scyphozoa, Coronatae). <i>Mar. Biol. (Berl.) 157(3)</i>: 527-535. <a href=\"http://dx.doi.org/10.1007/s00227-009-1338-3\" target=\"_blank\">http://dx.doi.org/10.1007/s00227-009-1338-3</a>","BEntID":248337,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Mar. Biol. (Berl.) 157(3)</i>: 527-535. <a href=\"http://dx.doi.org/10.1007/s00227-009-1338-3\" target=\"_blank\">http://dx.doi.org/10.1007/s00227-009-1338-3</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Tiemann, H.; Jarms, G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Tiemann, H.; Jarms, G.","Englishabstract":"An account is given about the development of the gametes of the holopelagic coronate scyphomedusa Periphylla periphylla (Péron and Lesueur 1809). The gonads of the species are complex and differ from those thus far described in Scyphozoa in having this characteristic composition of trophocytes, follicle cells, gamete-releasing pores, mucus cells, and resorption cells. Our results differ from those of previous coronate studies with respect to the contact of the oocytes with the gonad tissue throughout the duration of development. Among the Medusozoa, follicle cells have thus far been considered as an apomorphy for the Staurozoa, but their presence in the Scyphozoa casts some doubts on this assumption. From morphological structure and examination of the gonads and gametes, it can be deduced that P. periphylla has true organs and that gamete release is continuous. 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