Amakusanthura 1 7 



5. Integument noticeably pitted; mandible on one side lacking molar, on 



other side with spicate molar Apanthuroides t>-^^ 



Integument not pitted; mandibles similar on both sides Chalixanthura P- ^ 



6. Telson with single statocyst Anthomuda 



Telson with two statocysts, or lacking statocysts 7 



7. Pereopods 4—7, carpi roughly rectangular 8 



Pereopods 4-7, carpi triangular, with anterior margin considerably 



shorter than posterior margin 9 



8. Maxillipedal palp of two articles Haliophasma 



Maxillipedal palp of three articles Malacanthura 



9. Maxillipedal palp of one article; mandibular palp of one article 



PendanthuravSC 



Maxillipedal palp of more than one article; mandibular palp of more 

 than one article 10 



10. Maxillipedal palp of two articles 11 



Maxillipedal palp of three articles 12 



1 1 . Mandibular palp of two articles Cortezura f*- ^ ' 



Mandibular palp of three articles Cyathura f- ^* 



12. Cephalon with midventral process at base of mouthparts . . Skuphonura 

 Cephalon lacking midventral process 13 



13. Pleon lacking dorsal grooves or lines indicating boundaries of fused 



pleonites; species-specific persistent dorsal pigment pattern usually 



present Mesanthura 



Pleon with dorsal grooves or lines indicating boundaries of fused 



pleonites; persistent pigment pattern lacking 14 



14. Pleon with complete dorsal lines separating pleonites 



1-5 Apanthura (■ ^ 



Pleon with incomplete dorsal line between pleonites 4 and 5 



Amakusanthura j ["?" " 



Amakusanthura Nunomura, 1977 



DIAGNOSIS Integument sometimes with pigment. Eyes present. Antennular 

 flagellum of three articles. Antennal flagellum of two to four articles. Man- 

 dibular palp of three articles, terminal articles bearing distal spines. Max- 



