| two new species and a new phyllobothriid cestode genus from sharks of the genus negaprion whitley (carcharhiniformes). | alexandercestus n. g. (cestoda: tetraphyllidea) is erected for two cestode species found parasitising the two known species of lemon sharks (carcharhiniformes: negaprion spp.). this new genus differs from all other phyllobothriid genera except for hemipristicola cutmore, theiss, bennett & cribb, 2011, marsupiobothrium yamaguti, 1952, nandocestus reyda, 2008, orectolobicestus ruhnke, caira & carpenter 2006, orygmatobothrium diesing, 1863, paraorygmatobothrium ruhnke, 1994 and phyllobothrium van b ... | 2013 | 23595490 |