Ruta, Marcello A new stylophoran echinoderm, Juliaecarpus milnerorum, from the late Ordovician Upper Ktaoua Formation of Morocco - London Natural History Museum November 1999 - pp. 47-79 ilus., láms. ISSN: 0968-0462 Subjects--Topical Terms: ECHINODERMATAORDOVICICO Subjects--Geographic Terms: MARRUECOS