Description of a new potential fossil hydromedusa Palaequorea rygoli and revision of the fossil medusa Hydrocraspedota mayri from the Plattenkalks of the Franconian Alb, Southern Germany. Neues Jahrbuch fuer Geologie und Palaeontologie Abhandlungen, 264(3), Jun 2012: 249-262. 253 [Zoological Record Volume 148]